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US20030183517A1 - Polymer electrolyte, half cell for electrochemical measurements, and the use thereof - Google Patents

Polymer electrolyte, half cell for electrochemical measurements, and the use thereof Download PDF

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Publication number
US20030183517A1
US20030183517A1 US10/396,401 US39640103A US2003183517A1 US 20030183517 A1 US20030183517 A1 US 20030183517A1 US 39640103 A US39640103 A US 39640103A US 2003183517 A1 US2003183517 A1 US 2003183517A1
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US
United States
Prior art keywords
polymer electrolyte
substituted alkyl
alkyl group
methacrylate
half cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/396,401
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English (en)
Inventor
Philippe Ehrismann
Rolf Thrier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mettler Toledo GmbH Germany
Original Assignee
Mettler Toledo Schweiz GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mettler Toledo Schweiz GmbH filed Critical Mettler Toledo Schweiz GmbH
Assigned to METTLER-TOLEDO GMBH reassignment METTLER-TOLEDO GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EHRISMANN, PHILIPPE, THRIER, ROLF
Publication of US20030183517A1 publication Critical patent/US20030183517A1/en
Assigned to METTLER-TOLEDO AG reassignment METTLER-TOLEDO AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: METTLER-TOLEDO GMBH
Priority to US11/797,763 priority Critical patent/US7387716B2/en
Abandoned legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28Electrolytic cell components
    • G01N27/30Electrodes, e.g. test electrodes; Half-cells
    • G01N27/301Reference electrodes

Definitions

  • the invention relates to a polymer electrolyte, to a half cell, and to uses of the half cell and of the polymer electrolyte.
  • half cells for electrochemical measurements such as potentiometric or amperometric measurements
  • such half cells can be embodied as reference electrodes, which are used in combination with potentiometric or amperometric sensors.
  • reference electrodes it is imporant that they output as constant a reference potential as possible.
  • a fluid reference electrolyte such as an aqueous potassium chloride solution
  • a fluid measuring medium such as a liquid connection
  • the liquid junction is typically designed as a more or less porous diaphragm.
  • One disadvantage of such liquid junctions is that soiling or even plugging up of the pores can occur, which can lead to considerable faulty potentials and possibly interruptions.
  • reference electrodes instead of the diaphragm, a single opening or a plurality of openings is provided, as a result of which the aforementioned problem of soiling can be largely avoided.
  • this embodiment means that instead of the otherwise usual fluid or gel-like reference electrolyte, a non-flowable reference electrolyte is used, to prevent the reference electrolyte from flowing out.
  • EP 1124132 A1 which is hereby incorporated by reference in its entirety, a reference electrode of this generic type is described which contains a polymer electrolyte that contains a polymer on the basis of monomers selected from N-substituted acrylamides and/or methacrylates.
  • the methacrylate is a methacrylate with at least two hydroxy groups, and in particular 2,3-dihydroxypropyl methacrylate.
  • An object of the invention is to furnish further polymer electrolytes which are especially well suited for electrochemical half cells and in particular for reference half cells.
  • Other objects of the invention are to furnish an improved half cell and to disclose uses of the half cell and of the polymer electrolytes.
  • the polymer electrolytes of the invention contain a polymer which as a first monomer component contains at least one alkyl methacrylate.
  • the aforementioned alkyl methacrylate has a substituted alkyl group with from three to seven carbon atoms and at least two substituents, and the aforementioned substituents are selected from the group comprising OR 1 and NR 2 R 3 , and R 1 , R 2 and R 3 are selected from the group comprising hydrogen, methyl, and ethyl, on the condition that the substituted alkyl group contains the substituent OH at most once.
  • the properties of the polymer electrolyte in particular its polarity and hence its resistance and stability to water or to polar or apolar solvents, can be adapted accordingly to the intended area of use.
  • the polymer electrolytes of the invention are distinguished by good resistance and stability to acids.
  • the half cell of the invention which can be used as a component in potentiometric or amperometric sensors, contains one of the polymer electrolytes of the invention.
  • the polymer electrolyte of the invention can also be used as a solid-phase electrolyte in a battery half cell.
  • Exemplary embodiments are directed to the substituted alkyl group of the alkyl methacrylate intended as the first monomer component.
  • the substituted alkyl group is a 3-amino-2-hydroxypropyl or a 2-amino-3-hydroxypropyl.
  • the substituted alkyl group may be a 3-diethylamino-2-hydroxypropyl, a 3-ethoxy-2-hydroxypropyl, a 3-methoxy-2-hydroxypropyl, or a 3- methylamino-2-hydroxypropyl.
  • the substituted alkyl group can be a —CH 2 —CH 2 OH—CH 2 —NR 2 R 3 or a —CH 2 —CH 2 —NR 2 R 3 —CH 2 OH, in which R 2 and R 3 , are as described above.
  • the substituted alkyl group can be a —CH 2 —CH 2 OH—CH 2 —OR 4 or a —CH 2 —CH 2 —OR 4 —CH 2 OH, in which R 4 is a methyl or ethyl.
  • a mixture of alkyl methacrylates of the type named above can also be contemplated as the first monomer component.
  • the polymer contains, as a further monomer component, a hydroxyalkyl methacrylate, which is preferably 2-hydroxyethyl methacrylate and/or 3-hydroxypropyl methacrylate.
  • a hydroxyalkyl methacrylate which is preferably 2-hydroxyethyl methacrylate and/or 3-hydroxypropyl methacrylate.
  • Exemplary embodiments can be used in conjunction with a half cell with a glass housing. Because the polymer contains, as an additional monomer component, a silylated alkyl methacrylate, preferably 3-(trimethoxysilyl)propyl methacrylate, an adhesion of the polymer electrolyte to the glass housing is achieved, as a result of which a longer service life of the half cell and in particular better resistance to pressure and washing out is attained.
  • a silylated alkyl methacrylate preferably 3-(trimethoxysilyl)propyl methacrylate
  • Exemplary embodiments are directed to a polymer electrolyte.
  • This polymer electrolyte can additionally contain a concentrated aqueous solution of a salt or salt mixture, which is indicated for use in polar measuring media.
  • the polymer electrolyte can contain a mixture of an organic solvent and an aqueous solution of a salt and is accordingly predominantly usable for less-polar measuring media.
  • the organic solvent is selected from the group comprising glycerine, ethylene glycol, methanol, ethanol, N-propanol, isopropanol, acetone, and mixtures thereof. It is especially advantageous if the salt is additionally in the form of a suspension.
  • the progressive depletion of the salt caused by the washing out can be readily ascertained visually from the developing washing-out or depletion front, which forms the boundary between a region of the polymer electrolyte that is clouded by the salt suspension and a region of the polymer electrolyte that is more clear because the salt suspension is no longer present there.
  • the aforementioned salt is selected from the group comprising potassium chloride, sodium chloride, lithium chloride, potassium nitrate, potassium perchlorate, sodium formiate, lithium acetate, lithium sulfate, ammonium chloride, methylammonium chloride, dimethylammonium chloride, trimethylammonium chloride, and mixtures thereof.
  • This salt can, however, also be a further ionic organic halide, for instance.
  • This salt can also form a redox system.
  • the half cell can have an open liquid junction between the polymer electrolyte and a surrounding medium—as a rule, a measuring medium or a fluid specimen.
  • a surrounding medium as a rule, a measuring medium or a fluid specimen.
  • FIGURE schematically shows a reference electrode for electrochemical measurements in longitudinal section.
  • the reference electrode shown in the drawing has a tubular housing 2 , made from glass or plastic, whose lower end 4 , in the example shown, is immersed in a measuring medium 6 .
  • the interior of the housing 2 is filled with a polymer electrolyte 8 , in which a lead-off element 10 is immersed.
  • the lead-off element is formed for instance by a chlorinated silver wire, which is extended to the outside through an upper cap part 12 of the housing 2 .
  • An opening 14 in the vicinity of the lower end 4 serves as liquid junction between the polymer electrolyte 8 and the measuring medium 6 .
  • the polymer electrolyte 8 is advantageously formed in the interior of the housing 2 ; first the requisite educts, and in particular the corresponding monomer components, are introduced into the interior, and after that a polymerization is performed. In this reaction, a solidification takes place, so that the polymer electrolyte 8 formed cannot escape from the opening 14 .
  • the reference electrode can be combined with a measuring electrode, for instance a pH electrode, to form a single-rod measurement chain, in a manner known per se.
  • a measuring electrode for instance a pH electrode
  • electrochemical half cells can be equipped with the polymer electrolyte, for instance for amperometric measurements.
  • the polymer electrolyte can also be used as a solid-phase electrolyte in a battery half cell.
  • the first monomer component designated above as aminohydroxypropyl methacrylate (AHPMA)
  • AHPMA aminohydroxypropyl methacrylate
  • 3-amino-2-hydroxypropyl methacrylate and 2-amino-3-hydroxypropyl methacrylate which can be produced for instance by reacting glycidyl methacrylate (2,3-epoxypropyl methacrylate) with ammonia in an isomer ratio of approximately 9:1.
  • WAKO 44 is a radical former that is used as an azo initiator for polymerization reactions.
  • TEMED is a starter compound for the polymerization of acryl and methacryl derivatives.
  • Silica gel and aerosil are used to improve the consistency of the polymer and to adsorb interfering substances, such as electrode poisons, from the measuring medium.
  • the polymer electrolytes described above are distinguished by excellent stability to acids, water, and both polar and apolar solvents. Accordingly, these polymer electrolytes can be used in the most various types of measuring media.
  • Example 1 Proportion by Weight Monomer 3-Amino-2-hydroxypropyl methacrylate 15% 3-(Trimethyloxysilyl)propyl 1% methacrylate Cross-linking agent 2% Fillers KCl 25% Silicic acid 5% Solvents Water 22% Glycerine 30%
  • Example 3 Proportion by Weight Monomer 3-Ethoxy-2-hydroxypropyl 18% methacrylate 3-(Trimethyloxysilyl)propyl 1% methacrylate Cross-linking agent 3% Fillers KCl 20% Silicic acid 5% Solvents Water 20% Glycerine 33%
  • Example 4 Proportion by Weight Monomer 3-Methoxy-2-hydroxypropyl 19% methacrylate 3-(Trimethyloxysilyl)propyl 1% methacrylate Cross-linking agent 3% Fillers KCl 15% Silicic acid 6% Solvents Water 21% Glycerine 35%
  • Example 5 Proportion by Weight Monomer 3-Methylamino-2-hydroxypropyl 14% methacrylate 3-(Trimethyloxysilyl)propyl 1% methacrylate Hydroxypropyl methacrylate 4% Cross-linking agent 5% Fillers KCl 20% Silicic acid 5% Solvents Water 15% Glycerine 36%
  • the polymer electrolyte of Example 1 is stable to water but not to organic solvents.
  • the polymer electrolyte of Example 2 is suitable for use with water and polar solvents.
  • the polymer electrolyte of Example 4, compared to that of Example 3, has a shorter service life.
  • the polymer electrolyte of Example 5 is especially well suited, because of its stability, for use with any organic solvents.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Conductive Materials (AREA)
US10/396,401 2002-03-27 2003-03-26 Polymer electrolyte, half cell for electrochemical measurements, and the use thereof Abandoned US20030183517A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/797,763 US7387716B2 (en) 2002-03-27 2007-05-07 Polymer electrolyte, half cell for electrochemical measurements, and the use thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10214035A DE10214035A1 (de) 2002-03-27 2002-03-27 Polymer-Elektrolyt, Halbzelle für elektrochemische Messungen sowie deren Verwendung
DE10214035.9 2002-03-27

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US11/797,763 Expired - Fee Related US7387716B2 (en) 2002-03-27 2007-05-07 Polymer electrolyte, half cell for electrochemical measurements, and the use thereof

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JP (1) JP4413514B2 (de)
CH (1) CH696007A5 (de)
DE (1) DE10214035A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1560019A1 (de) * 2004-01-28 2005-08-03 Mettler-Toledo GmbH Polymer-Elektrolyt, Halbzelle für elektrochemische Messungen sowie deren Verwendung
EP1956369A2 (de) 2007-02-08 2008-08-13 Hamilton Bonaduz AG Nano-Hybridgele auf Basis von umgeesterten Organosiloxanen als Polymer-Elektrolyte
US20090166198A1 (en) * 2007-12-28 2009-07-02 Industrial Technology Research Institute Reference electrode
WO2014091083A1 (en) * 2012-12-14 2014-06-19 Åbo Akademi A reference electrode and an arrangement for an electrochemical measurement

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080012014A1 (en) * 2006-07-14 2008-01-17 Jin-Seong Park Thin film transistor, method of preparing the same, and flat panel display device including the thin film transistor
US8986928B2 (en) * 2009-04-10 2015-03-24 Pacific Biosciences Of California, Inc. Nanopore sequencing devices and methods
US9017937B1 (en) * 2009-04-10 2015-04-28 Pacific Biosciences Of California, Inc. Nanopore sequencing using ratiometric impedance
US8652779B2 (en) * 2010-04-09 2014-02-18 Pacific Biosciences Of California, Inc. Nanopore sequencing using charge blockade labels
WO2013087106A1 (de) 2011-12-15 2013-06-20 Mettler-Toledo Ag Referenzelektrode
JP6603135B2 (ja) * 2014-01-31 2019-11-06 株式会社パイロットコーポレーション 比較電極用内部液、比較電極及びガラス電極
KR20170047656A (ko) 2015-10-23 2017-05-08 삼성전자주식회사 리튬 이차전지용 비수 전해액 및 이를 포함하는 리튬 이차전지
KR20170047659A (ko) 2015-10-23 2017-05-08 삼성전자주식회사 리튬 이차전지용 비수 전해액 및 이를 포함하는 리튬 이차전지
KR102490866B1 (ko) 2015-10-23 2023-01-20 삼성전자주식회사 리튬 이차전지용 비수 전해액 및 이를 포함하는 리튬 이차전지
KR102425829B1 (ko) 2015-10-23 2022-07-28 삼성전자주식회사 리튬 이차전지용 비수 전해액 및 이를 포함하는 리튬 이차전지
CN110603666B (zh) 2017-05-04 2023-01-10 联邦科学及工业研究组织 固态参比电极
AT520779B1 (de) 2017-12-21 2020-03-15 Erba Tech Austria Gmbh Referenzelektrode zur potentiometrischen Messung von Ionenkonzentrationen

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US4432366A (en) * 1981-11-27 1984-02-21 Cordis Corporation Reference electrode catheter
US20020193451A1 (en) * 1999-08-18 2002-12-19 Jsr Corporation Method of chemical mechanical polishing

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GB9118300D0 (en) 1991-08-24 1991-10-09 Kodak Ltd Reference half-cell electrode
JPH05198303A (ja) 1992-01-21 1993-08-06 Dai Ichi Kogyo Seiyaku Co Ltd 電 池
US5549988A (en) * 1995-03-10 1996-08-27 Motorola, Inc. Polymer electrolytes and electrochemical cells using same
EP1124132B1 (de) * 2000-02-10 2008-12-31 Hamilton Bonaduz AG Polymerelektrolyt
DE502004005900D1 (de) * 2004-01-28 2008-02-21 Mettler Toledo Gmbh Polymer-Elektrolyt, Halbzelle für elektrochemische Messungen sowie deren Verwendung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798750A (en) * 1972-07-21 1974-03-26 Gen Electric Sensor and method of manufacture
US4432366A (en) * 1981-11-27 1984-02-21 Cordis Corporation Reference electrode catheter
US20020193451A1 (en) * 1999-08-18 2002-12-19 Jsr Corporation Method of chemical mechanical polishing

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1560019A1 (de) * 2004-01-28 2005-08-03 Mettler-Toledo GmbH Polymer-Elektrolyt, Halbzelle für elektrochemische Messungen sowie deren Verwendung
WO2005073704A1 (de) * 2004-01-28 2005-08-11 Mettler-Toledo Gmbh Polymer-elektrolyt, halbzelle für elektrochemische messungen sowie deren verwendung
US20070020527A1 (en) * 2004-01-28 2007-01-25 Mettler-Toledo Ag Polymer electrolyte, half-cell for electrochemical measurements, as well as the use thereof
CN100529751C (zh) * 2004-01-28 2009-08-19 梅特勒-托利多公开股份有限公司 含有聚合物电解质的参比半电池及其应用
US7790323B2 (en) * 2004-01-28 2010-09-07 Mettler-Toledo Ag Polymer electrolyte, half-cell for electrochemical measurements, as well as the use thereof
EP1956369A2 (de) 2007-02-08 2008-08-13 Hamilton Bonaduz AG Nano-Hybridgele auf Basis von umgeesterten Organosiloxanen als Polymer-Elektrolyte
EP1956368A1 (de) * 2007-02-08 2008-08-13 Hamilton Bonaduz AG Nano-Hybridgele als Polymer-Elektrolyte
US20090166198A1 (en) * 2007-12-28 2009-07-02 Industrial Technology Research Institute Reference electrode
US8187435B2 (en) * 2007-12-28 2012-05-29 Industrial Technology Research Institute Reference electrode
WO2014091083A1 (en) * 2012-12-14 2014-06-19 Åbo Akademi A reference electrode and an arrangement for an electrochemical measurement
US10094798B2 (en) 2012-12-14 2018-10-09 Abo Akademi University Reference electrode and an arrangement for an electrochemical measurement

Also Published As

Publication number Publication date
US20070205098A1 (en) 2007-09-06
JP4413514B2 (ja) 2010-02-10
DE10214035A1 (de) 2003-10-09
JP2004004011A (ja) 2004-01-08
US7387716B2 (en) 2008-06-17
CH696007A5 (de) 2006-11-15

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