WO2024042854A1 - 全固体型カリウムイオン選択性電極およびその製造方法 - Google Patents
全固体型カリウムイオン選択性電極およびその製造方法 Download PDFInfo
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- the present invention relates to an all-solid-state potassium ion selective electrode and a method for manufacturing the same.
- Ion-selective electrodes are used in devices that measure ion concentration in liquids, and generate potential changes in response to specific ions. It has various application fields and is used in environment-related technology, medical-related technology, agricultural-related technology, etc.
- Patent Document 1 discloses a magnesium ion-selective electrode and a calcium ion-selective electrode containing a Prussian blue analog.
- the present invention was made to solve these problems, and aims to provide a more stable potassium ion-selective electrode and a method for manufacturing the same.
- An example of an all-solid-state potassium ion selective electrode according to the present invention is a conductor; an insertion material formed on the surface of the conductor; a potassium ion sensitive membrane covering the insertion material; Equipped with The insertion material is a mixed material containing Prussian blue analog particles and conductive material particles,
- the Prussian blue analog particles are represented by the structural formula K x Fe[Fe(CN) 6 ] y ⁇ nH 2 O,
- the Prussian blue analog particles have at least a monoclinic crystal structure, x is a number greater than or equal to 1.5 and less than or equal to 2, y is a number greater than 0 and less than or equal to 1, and n is a number greater than or equal to 0.
- An example of the method for manufacturing the all-solid-state potassium ion selective electrode according to the present invention is as follows: a conductor; an insertion material formed on the surface of the conductor; a potassium ion sensitive membrane covering the insertion material; A method for producing an all-solid-state potassium ion selective electrode, comprising:
- the insertion material is a mixed material containing Prussian blue analog particles and conductive material particles,
- the Prussian blue analog particles are represented by the structural formula K x Fe[Fe(CN) 6 ] y ⁇ nH 2 O,
- the Prussian blue analog particles have at least a monoclinic crystal structure, x is a number greater than or equal to 1.5 and less than or equal to 2, y is a number greater than 0 and less than or equal to 1, and n is a number greater than or equal to 0,
- the method includes: supplying slurry onto the conductor and drying the slurry to form a mixture film on the surface of the conductor; forming an insertion material on the
- the method comprises the step of manufacturing the slurry,
- the step of producing the slurry includes the step of oxidizing a monoclinic Prussian blue analog to synthesize Prussian blue analog particles having at least a portion of a cubic crystal structure.
- the method includes, after the step of forming the potassium ion sensitive membrane, holding the electrode at the redox potential of K2FeFe in an aqueous K2SO4 solution.
- the method comprises the step of manufacturing the slurry,
- the step of manufacturing the slurry includes: Prussian blue analog particles; Acetylene black or Ketjen black or multi-wall carbon nanotubes, polyvinylidene fluoride, including the step of mixing.
- Prussian blue analog particles include: Acetylene black or Ketjen black or multi-wall carbon nanotubes, polyvinylidene fluoride, including the step of mixing.
- the stability of the potassium ion-selective electrode can be further improved.
- the structure of the ion selective electrode 10 according to Embodiment 1 of the present invention A part of the process of manufacturing a slurry for forming the insertion material 2 of FIG. 1.
- FIG. 1 shows the configuration of an ion-selective electrode 10 according to Embodiment 1 of the present invention.
- the ion-selective electrode 10 is an all-solid-state potassium ion-selective electrode.
- FIG. 1(a) shows a plan view
- FIG. 1(b) shows a cross-sectional view taken along line BB in FIG. 1(a).
- the ion selective electrode 10 includes an epoxy resin 5, a copper wiring 4 disposed in the epoxy resin 5, a platinum electrode 3 (conductor) connected to the copper wiring 4 and exposed on the surface of the epoxy resin 5, and a platinum electrode 3.
- An insertion material 2 formed on the surface of the insertion material 2 and a potassium ion sensitive film 1 covering the insertion material 2 are provided.
- Any insulator can be used in place of the epoxy resin 5, and any conductor can be used in place of the copper wiring 4 and/or platinum electrode 3.
- Insertion material 2 is a mixed material containing Prussian blue analog particles and conductive material particles.
- Prussian blue analog particles are represented by the structural formula K x Fe[Fe(CN) 6 ] y ⁇ nH 2 O.
- x is a number of 1.5 or more and 2 or less, and is preferably close to 2.
- y is a number greater than 0 and less than or equal to 1, and is preferably close to 0.
- n is a number greater than or equal to 0.
- the Prussian Blue analog particles have at least a part of them a monoclinic crystal structure.
- the Prussian blue analog particles may have a cubic crystal structure in part.
- the manufacturing method includes a step of manufacturing a slurry for forming the insertion material 2, and the ion-selective electrode 10 is manufactured using the manufactured slurry.
- K x FeFe a substance containing K x FeFe, when x is relatively close to 2, it may be written as "K 2 FeFe", but this notation does not necessarily mean that the value of x is 2. It is not intended to limit the range of x.
- FIG. 2 shows a part of the process of manufacturing a slurry for forming the insertion material 2.
- the process shown in FIG. 2 is particularly a process for synthesizing the active material contained in the slurry.
- iron chloride ( II ) 100 mL of an aqueous solution (4 mmol Fe II Cl 2 ) is added dropwise and stirred (Step S1).
- These solutions preferably contain tripotassium citrate (1.0 M), which functions as a K 2 FeFe particle size control and K source. Dripping is performed, for example, under a nitrogen atmosphere at a rate of 0.5 mL/min. Stirring is performed at 300 rpm using a stirring blade, for example.
- K 2 FeFe is synthesized. Note that the method for synthesizing K 2 FeFe is not limited to the method shown in FIG. 2, and can be designed as appropriate by those skilled in the art.
- step S2 the above white precipitate is stirred (step S2). Stirring is performed, for example, at room temperature under a nitrogen atmosphere using a stirring blade at 300 rpm for 15 hours.
- step S3 the white precipitate is suction filtered under a nitrogen atmosphere.
- step S4 the white precipitate is washed (step S4). Cleaning is performed using ion-exchanged water and ethanol, for example under a nitrogen atmosphere. Since K 2 FeFe is a substance that is extremely easily oxidized in the atmosphere, steps S1 to S4 of the steps in FIG. 2 are preferably performed under a nitrogen atmosphere as described above to prevent oxidation during synthesis. .
- step S5 the white precipitate is dried. Drying is performed, for example, by vacuuming at 100° C. for 24 hours.
- the powder sample obtained as a result of step S5 is exposed to the atmosphere for several days. This yields a blue powder of K 2 FeFe.
- This blue powder is a Prussian blue analog particle containing a cubic crystal structure at least in part, and serves as the active material of the insertion material 2.
- the blue powder is considered to be a two-phase coexistence of Prussian blue and Prussian white.
- the step of producing the slurry includes the step of oxidizing the monoclinic Prussian blue analog to synthesize Prussian blue analog particles that include at least a portion of the cubic crystal structure.
- oxidation was performed at ambient room temperature by exposing the material to the atmosphere for several days, but the oxidation method is not limited to this, and oxidation may be performed electrochemically or by other methods. Good too. Further, depending on the composition of K 2 FeFe, the oxidation step may be omitted.
- FIG. 3 shows an example of the results of X-ray diffraction measurement of a Prussian blue analogue.
- “ ⁇ ” in the structural formula of FIG. 3 indicates a [Fe(CN) 6 ] defect.
- c-KFeHCF cubic Prussian blue analog
- m-KFeHCF monoclinic Prussian blue analog
- Figure 4 shows an example of the results of particle size measurement of Prussian blue analogues.
- the horizontal axis represents the particle size, and the vertical axis represents the volume ratio.
- the c-KFeHCF according to the comparative example has a larger particle size because the particles are slightly aggregated.
- FIG. 5 shows an example of a method for manufacturing the ion-selective electrode 10 using the active material synthesized in this way.
- the method includes a step of manufacturing a slurry (step S11).
- the step of manufacturing the slurry includes the step of mixing the active material (Prussian blue analog particles) synthesized as described above, a conductive material, and a binder.
- the ratio of active material:conductive material:binder is, for example, 80:10:10 [wt%].
- the conductive material is, for example, acetylene black, Ketjen black, or multi-wall carbon nanotubes, and in the example of FIG. 5, it is acetylene black (AB).
- the binder in the example of FIG. 5, is polyvinylidene fluoride dispersed in N-methylpyrrolidone (NMP).
- the manufacturing method according to the first embodiment includes the step of forming a mixture film on the surface of the platinum electrode 3 by supplying slurry onto the platinum electrode 3 and drying the slurry.
- the slurry contains Prussian blue analog particles represented by the structural formula K x Fe[Fe(CN) 6 ] y ⁇ nH 2 O.
- Prussian blue analog particles have a monoclinic crystal structure at least in part, x is a number from 1.5 to 2, y is a number from 0 to 1, and n is 0. These are the above numbers.
- step S14 the mixture film is immersed in a 0.01M KCl aqueous solution (first potassium chloride aqueous solution) (step S14). Soaking is carried out for 24 hours, for example. This provides appropriate conditioning and makes it possible to form the insertion material 2 on the surface of the platinum electrode 3 by homogenizing the distribution of K + in the Prussian blue analogue.
- a potassium ion sensitive membrane (K + -ISM) stock solution is dropped onto the surface of the insertion material 2 (step S15).
- the dropping amount is, for example, 50 ⁇ L.
- the potassium ion sensitive membrane stock solution includes, for example, an ionophore, a membrane matrix, a membrane solvent, and an anion scavenger.
- the ionophore is, for example, bis(benzo-15-crown-5)
- the membrane matrix is, for example, polyvinyl chloride (PVC)
- the membrane solvent is, for example, o-nitrophenyl octyl ether (o-NPOE)
- the anion scavenger is, for example, potassium tetrakis(4-chlorophenyl)borate (K-TCPB).
- Tetrahydrofuran (THF) is used as a dispersion medium.
- step S16 the potassium ion-sensitive membrane stock solution is dried (step S16). Drying takes place, for example, overnight at room temperature. This forms an ion-sensitive membrane.
- the manufacturing method according to the first embodiment supplies the potassium ion-sensitive membrane stock solution to the surface of the insertion material 2, and dries the potassium ion-sensitive film stock solution, so that the ion-sensitive membrane stock solution is applied to the surface of the insertion material 2.
- the method includes a step of forming a raw film.
- this ion-sensitive raw film is immersed in a 0.01M KCl aqueous solution (second potassium chloride aqueous solution) (step S17). Soaking is carried out for 24 hours, for example. As a result, appropriate conditioning is performed, and a potassium ion sensitive film 1 is formed on the surface of the insertion material 2. In this way, the ion selective electrode 10 shown in FIG. 1 is manufactured.
- a 0.01M KCl aqueous solution second potassium chloride aqueous solution
- FIG. 6 shows an example of the results of a constant current charge/discharge test.
- the test was conducted with the following configuration.
- Cell...SB9 two-chamber three-electrode cell
- Working electrode ion selective electrode 10
- KB London blue
- KB London blue
- PVdF polyvinylidene fluoride
- Reference electrode...Ag/AgCl saturated KCl
- FIG. 6 shows the results using an electrode of a comparative example, and is an example where x is less than 1.5 in the structural formula K x Fe[Fe(CN) 6 ] y ⁇ nH 2 O.
- c-KFeHCF such a composition
- the electrode according to the comparative example shows a sloped potential change, which is considered to be a single-phase reaction.
- FIG. 6(b) shows the results of using the electrode according to Embodiment 1, and is an example where x is 1.5 or more in the structural formula K x Fe[Fe(CN) 6 ] y ⁇ nH 2 O. .
- m-KFeHCF such a composition
- a stable potential plateau is observed in the electrode according to Embodiment 1, and it is considered that the reaction is a two-phase reaction.
- FIG. 7 shows an example of the results of self-potential measurement.
- the horizontal axis represents the logarithm of the potassium ion concentration, and the vertical axis represents the potential. Note that E 0 represents the intercept of the calibration curve at a concentration of 0.01.
- the absolute value of the potential is lower in the first embodiment. This is considered to be because in Embodiment 1, the amount of potassium in the crystal was large and the potassium ion activity was high, so that the membrane potential decreased.
- FIG. 8 shows reproducibility data of the self-potential measurement shown in FIG. 7.
- Three electrodes with the same structure represented as #1 to #3 were prepared, and self-potential measurements were performed on each electrode.
- FIG. 9 shows an example of the results of a long-term stability test. The test was conducted with the following configuration, and the potential change of the working electrode with respect to the reference electrode was measured.
- Working electrode “Potassium ion selective electrode
- Reference electrode ...Ag/AgCl (saturated KCl) Measurement solution
- 10-2M KCl aqueous solution Measurement temperature
- room temperature Measurement temperature
- FIG. 9 shows the measurement results of the comparative example and the first embodiment.
- the electrode using c-KFeHCF according to the comparative example had the worst long-term stability. This is considered to be because the potential curve has a slope shape as shown in FIG. 6(a), and therefore the potential fluctuation is large when a composition change occurs.
- the Prussian blue analogue was oxidized at atmospheric temperature in the step of producing a slurry, and the Prussian blue analogue was electrochemically oxidized in the step of producing the slurry. Measurements were carried out using each sample.
- the electrochemically oxidized electrode the electrode was kept at the redox potential of K 2 FeFe in a K 2 SO 4 aqueous solution. By holding the potential in this way, the amount of potassium in the crystal can be adjusted, so long-term stability is further improved.
- the potential curve When oxidized at room temperature in the atmosphere, the potential curve has a flat portion as shown in FIG. 6(b), so potential fluctuations when the composition changes are small and stability is high. Furthermore, in the case of electrochemical oxidation, the characteristics of the flat part shown in FIG. 6(b) appeared more strongly and showed the highest long-term stability.
- FIG. 9(b) shows reproducibility data for oxidation at room temperature in the atmosphere in Embodiment 1. Three electrodes with the same structure were produced and a long-term stability test was conducted on each.
- the electrode of the comparative example showed a potential fluctuation of about 20 mV on the 6th day, but as shown in FIGS. 9(a) and (b), the electrode of Embodiment 1 In both cases, the potential fluctuation was within about 10 mV on the 6th day.
- the all-solid-state potassium ion selective electrode according to Embodiment 1 uses K 2 FeFe, which is considered to be a two-phase coexistence of Prussian blue and Prussian white, as the active material, so that the potential fluctuation is about 10 mV. This has led to improved long-term stability of the electrode.
- FIG. 10 shows an example of the results of a polarization test using chronopotentiometry.
- the test was conducted with the following configuration.
- Working electrode ...Potassium ion selective electrode
- Counter electrode ...Pt line
- Reference electrode ...Ag/AgCl (saturated KCl)
- Electrolyte ... 10-2M KCl aqueous solution Applied current... ⁇ 1nA Measurement temperature...room temperature
- FIG. 11 shows a Nyquist plot as an example of the results of the AC impedance measurement test.
- the horizontal axis in FIG. 11 represents the real part of impedance, and the vertical axis represents the imaginary part.
- the test was conducted with the following configuration.
- Working electrode ...Potassium ion selective electrode
- Counter electrode ...Pt line
- Reference electrode ...Ag/AgCl (saturated KCl)
- Amplitude...100mV Frequency...100kHz ⁇ 10mHz Measurement temperature...room temperature
- the stability of the potassium ion-selective electrode can be further improved.
- FIG. 12 shows an example of how to use the ion-selective electrode 10.
- Ion selective electrode 10 and reference electrode 11 are immersed in test liquid 12 .
- Ion selective electrode 10 and reference electrode 11 are electrically connected via voltage measuring device 13 .
- the voltage measuring device 13 measures the potential difference between the ion selective electrode 10 and the reference electrode 11 and outputs a signal representing the potential difference. Since the measured potential difference changes depending on the concentration of potassium ions contained in the test liquid 12, the concentration of potassium ions can be calculated based on the potential difference.
- Embodiment 2 differs from Embodiment 1 in that the specific configuration of the ion-selective electrode is changed. Hereinafter, descriptions of parts common to Embodiment 1 may be omitted.
- FIG. 13 shows the configuration of an electrode device 30 according to the second embodiment.
- the electrode device 30 includes a substrate 21 , an ion-selective electrode 20 , and a reference electrode 11 .
- the substrate 21 is made of alumina, for example. Ion selective electrode 20 and reference electrode 11 are formed on substrate 21 .
- the ion-selective electrode 20 is an all-solid-state potassium ion-selective electrode, and has the same configuration as the ion-selective electrode 10 of Embodiment 1 (however, the insulator part is made of a substrate 21 instead of the epoxy resin 5). ). Moreover, the ion-selective electrode 20 can be manufactured by the same manufacturing method as the ion-selective electrode 10 of Embodiment 1.
- a pair of connection parts 22 are formed on the substrate 21.
- the pair of connecting parts 22 are connected to the ion-selective electrode 20 and the reference electrode 11 via conductive wires 23, respectively.
- a part of the surface of the substrate 21, including the area where the conductive wire 23 is formed, is covered with a protective film 24 (transparently shown by a broken line) made of an insulator such as epoxy. Ion-selective electrode 20 and reference electrode 11 are not covered by protective film 24, and connection portions 22 (at least a portion thereof) are also not covered by protective film 24.
- FIG. 14 shows an example of how to use the electrode device 30.
- the ion selective electrode 20 and the reference electrode 11 are immersed in the test liquid 12.
- Ion selective electrode 20 and reference electrode 11 are electrically connected via voltage measurement device 13 .
- the voltage measuring device 13 measures the potential difference between the ion selective electrode 20 and the reference electrode 11 and outputs a signal representing the potential difference. Since the measured potential difference changes depending on the concentration of potassium ions contained in the test liquid 12, the concentration of potassium ions can be calculated based on the potential difference.
- the all-solid-state potassium ion selective electrode according to Embodiment 2 has the same configuration as Embodiment 1 and is manufactured by the same manufacturing method, so that the stability of the potassium ion selective electrode is similar to that of Embodiment 2. can be further increased.
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Abstract
Description
導体と、
前記導体の表面に形成されたインサーション材料と、
前記インサーション材料を覆うカリウムイオン感応膜と、
を備え、
前記インサーション材料は、プルシアンブルー類似体粒子および導電材料粒子を含む混合材料であり、
前記プルシアンブルー類似体粒子は、構造式KxFe[Fe(CN)6]y・nH2Oで表され、
前記プルシアンブルー類似体粒子は、少なくとも一部に単斜晶系の結晶構造を持ち、
xは1.5以上2以下の数であり、yは0よりも大きく1以下の数であり、nは0以上の数である。
導体と、
前記導体の表面に形成されたインサーション材料と、
前記インサーション材料を覆うカリウムイオン感応膜と、
を備えた、全固体型カリウムイオン選択性電極の製造方法であって、
前記インサーション材料は、プルシアンブルー類似体粒子および導電材料粒子を含む混合材料であり、
前記プルシアンブルー類似体粒子は、構造式KxFe[Fe(CN)6]y・nH2Oで表され、
前記プルシアンブルー類似体粒子は、少なくとも一部に単斜晶系の結晶構造を持ち、
xは1.5以上2以下の数であり、yは0よりも大きく1以下の数であり、nは0以上の数であり、
前記方法は、
スラリーを導体上に供給し、前記スラリーを乾燥させることによって、前記導体の表面に合剤膜を形成する工程と、
前記合剤膜を第1の塩化カリウム水溶液に浸漬させ、前記プルシアンブルー類似体におけるK+の分布を均一にすることによって、前記導体の表面にインサーション材料を形成する工程と、
前記インサーション材料の表面にカリウムイオン感応膜原液を供給し、前記カリウムイオン感応膜原液を乾燥させることによって、前記インサーション材料の表面に、イオン感応原膜を形成する工程と、
前記イオン感応原膜を、第2の塩化カリウム水溶液に浸漬させることによって、前記インサーション材料の表面にカリウムイオン感応膜を形成する工程と、
を備える。
前記方法は、前記スラリーを製造する工程を備え、
前記スラリーを製造する工程は、単斜晶系プルシアンブルー類似体を酸化させることにより、少なくとも一部に立方晶系の結晶構造を含むプルシアンブルー類似体粒子を合成する工程を含む。
前記方法は、前記スラリーを製造する工程を備え、
前記スラリーを製造する工程は、
プルシアンブルー類似体粒子と、
アセチレンブラックまたはケッチェンブラックまたはマルチウォールカーボンナノチューブと、
ポリフッ化ビニリデンと、
を混合させる工程を含む。
本明細書は本願の優先権の基礎となる日本国特許出願番号2022-134340号の開示内容を包含する。
[実施形態1]
図1に、本発明の実施形態1に係るイオン選択性電極10の構成を示す。イオン選択性電極10は、全固体型カリウムイオン選択性電極である。図1(a)は平面図を示し、図1(b)は図1(a)のB-B線に沿った断面による断面図を示す。
セル…SB9(二室式三極セル)
作用極(イオン選択性電極10)…PB(プルシアンブルー):KB(ケッチェンブラック):PVdF(ポリフッ化ビニリデン)=70:20:10(重量%)
対極…AC:KB:PTFE(ポリテトラフルオロエチレン)=80:10:10(重量%)
参照極…Ag/AgCl(飽和KCl)
電解液…0.5M K2SO4水溶液
セパレータ…グラスファイバーフィルタ
電流密度…1C (156mAg-1)
電圧範囲…-0.25Vから0.50V vs. Ag/AgCl
作用極…カリウムイオン選択性電極
参照極…Ag/AgCl(飽和KCl)
測定溶液…10-2M KCl水溶液
測定温度…室温
作用極…カリウムイオン選択性電極
対極…Pt線
参照極…Ag/AgCl(飽和KCl)
電解液…10-2M KCl水溶液
印加電流…±1nA
測定温度…室温
作用極…カリウムイオン選択性電極
対極…Pt線
参照極…Ag/AgCl(飽和KCl)
電解液…10-2M KCl水溶液
振幅…100mV
周波数…100kHz~10mHz
測定温度…室温
実施形態2は、実施形態1において、イオン選択性電極の具体的構成を変更したものである。以下、実施形態1と共通する部分については説明を省略する場合がある。
2…インサーション材料
3…白金電極(導体)
4…銅配線
5…エポキシ樹脂
10…イオン選択性電極(全固体型カリウムイオン選択性電極)
11…参照電極
12…被検液
13…電圧測定装置
20…イオン選択性電極(全固体型カリウムイオン選択性電極)
21…基板
22…接続部
23…導線
24…保護膜
30…電極装置
本明細書で引用した全ての刊行物、特許および特許出願はそのまま引用により本明細書に組み入れられるものとする。
Claims (5)
- 導体と、
前記導体の表面に形成されたインサーション材料と、
前記インサーション材料を覆うカリウムイオン感応膜と、
を備え、
前記インサーション材料は、プルシアンブルー類似体粒子および導電材料粒子を含む混合材料であり、
前記プルシアンブルー類似体粒子は、構造式KxFe[Fe(CN)6]y・nH2Oで表され、
前記プルシアンブルー類似体粒子は、少なくとも一部に単斜晶系の結晶構造を持ち、
xは1.5以上2以下の数であり、yは0よりも大きく1以下の数であり、nは0以上の数である、
全固体型カリウムイオン選択性電極。 - 導体と、
前記導体の表面に形成されたインサーション材料と、
前記インサーション材料を覆うカリウムイオン感応膜と、
を備えた、全固体型カリウムイオン選択性電極の製造方法であって、
前記インサーション材料は、プルシアンブルー類似体粒子および導電材料粒子を含む混合材料であり、
前記プルシアンブルー類似体粒子は、構造式KxFe[Fe(CN)6]y・nH2Oで表され、
前記プルシアンブルー類似体粒子は、少なくとも一部に単斜晶系の結晶構造を持ち、
xは1.5以上2以下の数であり、yは0よりも大きく1以下の数であり、nは0以上の数であり、
前記方法は、
スラリーを導体上に供給し、前記スラリーを乾燥させることによって、前記導体の表面に合剤膜を形成する工程と、
前記合剤膜を第1の塩化カリウム水溶液に浸漬させ、前記プルシアンブルー類似体におけるK+の分布を均一にすることによって、前記導体の表面にインサーション材料を形成する工程と、
前記インサーション材料の表面にカリウムイオン感応膜原液を供給し、前記カリウムイオン感応膜原液を乾燥させることによって、前記インサーション材料の表面に、イオン感応原膜を形成する工程と、
前記イオン感応原膜を、第2の塩化カリウム水溶液に浸漬させることによって、前記インサーション材料の表面にカリウムイオン感応膜を形成する工程と、
を備える、全固体型カリウムイオン選択性電極の製造方法。 - 前記方法は、前記スラリーを製造する工程を備え、
前記スラリーを製造する工程は、単斜晶系プルシアンブルー類似体を酸化させることにより、少なくとも一部に立方晶系の結晶構造を含むプルシアンブルー類似体粒子を合成する工程を含む、
請求項2に記載の方法。 - 前記方法は、前記カリウムイオン感応膜を形成する前記工程の後に、電極をK2SO4水溶液中においてK2FeFeの酸化還元電位で電位保持する工程を含む、請求項2または3に記載の方法。
- 前記方法は、前記スラリーを製造する工程を備え、
前記スラリーを製造する工程は、
プルシアンブルー類似体粒子と、
アセチレンブラックまたはケッチェンブラックまたはマルチウォールカーボンナノチューブと、
ポリフッ化ビニリデンと、
を混合させる工程を含む、請求項2または3に記載の方法。
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| WO2017047374A1 (ja) * | 2015-09-14 | 2017-03-23 | 株式会社日立製作所 | イオン選択電極、その作製方法及びカートリッジ |
| JP2020046364A (ja) * | 2018-09-20 | 2020-03-26 | Koa株式会社 | 全固体型イオン選択性電極、および全固体型イオン選択性電極の製造方法 |
| US20210043932A1 (en) * | 2019-08-07 | 2021-02-11 | Tsinghua University | Method for rapidly preparing prussian blue analogue with monoclinic crystal structure |
| WO2023026883A1 (ja) * | 2021-08-24 | 2023-03-02 | Koa株式会社 | 全固体型カリウムイオン選択性電極、および全固体型カリウムイオン選択性電極の製造方法 |
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| WO2017047374A1 (ja) * | 2015-09-14 | 2017-03-23 | 株式会社日立製作所 | イオン選択電極、その作製方法及びカートリッジ |
| JP2020046364A (ja) * | 2018-09-20 | 2020-03-26 | Koa株式会社 | 全固体型イオン選択性電極、および全固体型イオン選択性電極の製造方法 |
| US20210043932A1 (en) * | 2019-08-07 | 2021-02-11 | Tsinghua University | Method for rapidly preparing prussian blue analogue with monoclinic crystal structure |
| WO2023026883A1 (ja) * | 2021-08-24 | 2023-03-02 | Koa株式会社 | 全固体型カリウムイオン選択性電極、および全固体型カリウムイオン選択性電極の製造方法 |
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