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CN1516304A - A lithium ion battery - Google Patents

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CN1516304A
CN1516304A CNA031135129A CN03113512A CN1516304A CN 1516304 A CN1516304 A CN 1516304A CN A031135129 A CNA031135129 A CN A031135129A CN 03113512 A CN03113512 A CN 03113512A CN 1516304 A CN1516304 A CN 1516304A
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lithium ion
ion battery
carbon nano
lithium
walled carbon
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陈杰良
吕昌岳
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Electrochemistry (AREA)
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  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
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Abstract

本发明涉及一种锂离子电池，其包括一阴极、一阳极及渗透隔离膜，该阴极包括LixCoyNizO2纳米颗粒，阳极包括由多壁碳纳米管构成的碳纳米管阵列，各多壁碳纳米管包含多个同轴石墨管层，相邻石墨管层之间可嵌入锂离子，由于多壁碳纳米管的层状结构，阴极LixCoyNizO2纳米颗粒具有比表面积大及化学活性高的特点，因而可易于嵌入大量锂离子，从而提高电池的电容量。

Figure 03113512

The present invention relates to a lithium ion battery, which comprises a negative electrode, an anode and a permeable isolation membrane, the negative electrode comprises Li x Co y N z O 2 nanoparticles, and the anode comprises a carbon nanotube array composed of multi-walled carbon nanotubes, Each multi-walled carbon nanotube contains multiple coaxial graphite tube layers, and lithium ions can be intercalated between adjacent graphite tube layers. Due to the layered structure of multi-walled carbon nanotubes, the cathode Li x Co y N z O 2 nanoparticles have Due to its large specific surface area and high chemical activity, it can easily intercalate a large amount of lithium ions, thereby increasing the capacity of the battery.

Figure 03113512

Description

一种锂离子电池A lithium ion battery

【技术领域】【Technical field】

本发明涉及一种锂离子电池，尤其涉及一种利用碳纳米管及纳米颗粒作为电极材料的锂离子电池。The invention relates to a lithium ion battery, in particular to a lithium ion battery using carbon nanotubes and nanoparticles as electrode materials.

【背景技术】【Background technique】

由于视听、信息及通信等电子产品均朝向无线化、便携化方向发展，电子产品所用的电池，尤其是二次电池，广泛应用于消费性电子产品如手机、笔记本电脑等，其中，锂离子电池因其电容量大、环保而受到普遍欢迎。As electronic products such as audio-visual, information and communication are all developing towards wireless and portable, batteries used in electronic products, especially secondary batteries, are widely used in consumer electronic products such as mobile phones, notebook computers, etc. Among them, lithium-ion batteries It is widely welcomed because of its large capacity and environmental protection.

一般而言，锂离子电池包括一阴极、一阳极及连接阴极与阳极并将其分隔开的渗透隔离膜。其中，渗透隔离膜为多孔结构，可使离子通过，却对电子绝缘，一般为聚乙烯、聚丙烯或聚苯乙烯；阴极一般为嵌锂过渡金属氧化物，如LiMO2(M＝Co、Ni或Mn)，是电子供给者，阴极材料的原子在氧化过程中变成离子，并释放出电子，离子通过渗透隔离膜在另一电极还原，电子则传输至外电路中形成电流；阳极材料一般为可嵌锂化合物，如各种碳材料包括石墨、碳纤维及金属氧化物等。由于锂离子电池是通过锂离子的嵌入与脱嵌反应实现充放电，取代锂电池内锂金属沉积与溶解反应，因而可避免在电极表面锂的枝状晶化问题，使锂离子电池的寿命及安全性能更优。In general, a lithium-ion battery includes a cathode, an anode, and a permeable separator that connects and separates the cathode and anode. Among them, the permeable isolation membrane is a porous structure, which can allow ions to pass through but insulate electrons, and is generally polyethylene, polypropylene or polystyrene; the cathode is generally a lithium-intercalated transition metal oxide, such as LiMO 2 (M=Co, Ni or Mn), is the electron supplier, the atoms of the cathode material become ions during the oxidation process, and release electrons, the ions are reduced at the other electrode through the permeable isolation membrane, and the electrons are transmitted to the external circuit to form a current; the anode material is generally It is a compound that can intercalate lithium, such as various carbon materials including graphite, carbon fiber and metal oxide. Since lithium-ion batteries are charged and discharged through the intercalation and deintercalation reactions of lithium ions, replacing the lithium metal deposition and dissolution reactions in lithium batteries, it is possible to avoid the dendrite problem of lithium on the electrode surface, and to improve the life and safety of lithium-ion batteries. Better performance.

锂离子电池的电容量及充放电性能与阴极、阳极及渗透隔离膜有关，为提高锂离子电池的电容量，寻找更适合存储锂离子的电极材料成为研究重点。The capacity and charge-discharge performance of lithium-ion batteries are related to the cathode, anode and permeable separator. In order to improve the capacity of lithium-ion batteries, finding more suitable electrode materials for storing lithium ions has become a research focus.

碳纳米管是一种新型碳材料，由日本科学家Iijima于1991年发现，请参见″Helical microtubules of graphitic carbon″，S Iijima，Nature，vol.354，p56(1991)，它与石墨、金刚石互为同素异形体，有单壁碳纳米管与多壁碳纳米管之分。Jijun Zhao等人研究嵌锂碳纳米管的性质，发表在Physical ReviewLetters，vol.85，p1707～1709(2000)，结果表明，单壁碳纳米管内部及管间空隙均可嵌入锂，单壁碳纳米管的锂嵌入电势与石墨相似，但嵌入密度明显高于石墨，可达Li0.5C。Carbon nanotubes are a new type of carbon material, discovered by Japanese scientist Iijima in 1991, please refer to "Helical microtubules of graphitic carbon", S Iijima, Nature, vol.354, p56 (1991), it interacts with graphite and diamond Allotropes are divided into single-walled carbon nanotubes and multi-walled carbon nanotubes. Jijun Zhao and others studied the properties of lithium-intercalated carbon nanotubes, published in Physical Review Letters, vol.85, p1707-1709 (2000), and the results showed that lithium can be intercalated inside and between the single-walled carbon nanotubes, and single-walled carbon The lithium intercalation potential of nanotubes is similar to that of graphite, but the intercalation density is significantly higher than that of graphite, up to Li 0.5 C.

美国专利第6,280,697号揭露一种单壁碳纳米管作锂离子电池的电极材料，其制备过程包括：a)以激光烧蚀法制备单壁碳纳米管，其中含有其它杂质碳及金属催化剂颗粒；b)经清冼、纯化步骤，可获得单壁碳纳米管含量超过80％的混合物；c)将该混合物溶于溶液中，将一基底浸入该溶液，在基底表面形成一薄膜，该薄膜含有大量单壁碳纳米管。因单壁碳纳米管可嵌入锂，故，可用作锂离子电池的电极，其实验表明，其锂嵌入密度最高可达Li5.4C6。U.S. Patent No. 6,280,697 discloses a single-walled carbon nanotube as an electrode material for a lithium-ion battery. The preparation process includes: a) preparing a single-walled carbon nanotube by laser ablation, which contains other impurity carbon and metal catalyst particles; b) After cleaning and purification steps, a mixture with a single-walled carbon nanotube content exceeding 80% can be obtained; c) Dissolving the mixture in a solution, immersing a substrate in the solution, forming a film on the surface of the substrate, the film contains A large number of single-walled carbon nanotubes. Because single-walled carbon nanotubes can intercalate lithium, they can be used as electrodes for lithium-ion batteries. Experiments have shown that the lithium intercalation density can reach up to Li 5.4 C 6 .

但是，上述所用的单壁碳纳米管制备困难，产量小，不利于工业大量生产；而且，制备所得产物的直径与长度难以控制，产物纯度低，掺杂有大量无定型碳及金属催化剂纳米颗粒等杂质，需经过繁杂的提纯步骤。However, the above-mentioned single-walled carbon nanotubes used are difficult to prepare, and the output is small, which is not conducive to industrial mass production; moreover, the diameter and length of the prepared product are difficult to control, the product has low purity, and is doped with a large amount of amorphous carbon and metal catalyst nanoparticles. and other impurities, need to go through complicated purification steps.

因此，提供一种具有大电容量的锂离子电池实为必要。Therefore, it is necessary to provide a lithium-ion battery with a large electric capacity.

【发明内容】【Content of invention】

本发明之目的在于提供一种具有较大电容量且易于生产制备的锂离子电池。The object of the present invention is to provide a lithium ion battery with relatively large electric capacity and easy production and preparation.

本发明提供一种锂离子电池，其包括一阴极、一阳极及渗透隔离膜，该阴极包括LixCoyNizO2纳米颗粒，阳极包括由多壁碳纳米管构成的碳纳米管阵列，各多壁碳纳米管包含多个同轴石墨管层，相邻石墨管层之间可嵌入锂离子，该渗透隔离膜具有微孔结构，可使离子通过而不导电。The invention provides a lithium ion battery, which includes a cathode, an anode and a permeable separator, the cathode includes LixCoyNizO2nanoparticles , the anode includes a carbon nanotube array made of multi-walled carbon nanotubes , Each multi-walled carbon nanotube contains a plurality of coaxial graphite tube layers, and lithium ions can be intercalated between adjacent graphite tube layers. The permeable isolation membrane has a microporous structure, which allows ions to pass through and is not conductive.

与现有技术相比，本发明具有如下优点：由于阳极包括碳纳米管阵列，阴极的LixCoyNizO2纳米颗粒具有比表面积大、化学活性高的特点，因而易于嵌入更多锂离子，从而提高电池的电容量。Compared with the prior art, the present invention has the following advantages: since the anode includes a carbon nanotube array, the Li x Co y N z O 2 nanoparticles of the cathode have the characteristics of large specific surface area and high chemical activity, so it is easy to intercalate more lithium ions, thereby increasing the capacity of the battery.

【附图说明】【Description of drawings】

图1为本发明锂离子电池的示意图。Fig. 1 is a schematic diagram of the lithium ion battery of the present invention.

图2为碳纳米管阵列的示意图。Fig. 2 is a schematic diagram of a carbon nanotube array.

图3为本发明锂离子电池第一实施例的阳极示意图。Fig. 3 is a schematic diagram of the anode of the first embodiment of the lithium ion battery of the present invention.

图4为本发明锂离子电池第二实施例的阳极示意图。Fig. 4 is a schematic diagram of the anode of the second embodiment of the lithium ion battery of the present invention.

图5为多壁碳纳米管的示意图。Figure 5 is a schematic diagram of multi-walled carbon nanotubes.

【具体实施方式】【Detailed ways】

请参见图1，为本发明锂离子电池的示意图，其包括一阳极1，一阴极5，以及设置在阳极1和阴极5之间的渗透隔离膜3。该阴极5的材料包括LixCoyNizO2纳米颗粒，可通过烧结等方法制备，该LixCoyNizO2纳米颗粒的粒径为10纳米至100纳米，其中x、y、z的数值满足化学计量比即可。因纳米颗粒具有比表面积大、化学活性高的特点，因而易于发生反应，有利于锂离子的嵌入与脱嵌。渗透隔离膜3连接阳极1与阴极5，且将阳极1与阴极5隔开，其为多孔结构，孔径小，能通过离子，且该渗透隔离膜不导电，一般可采用聚乙烯、聚丙烯或聚苯乙烯材料。Please refer to FIG. 1 , which is a schematic diagram of a lithium-ion battery of the present invention, which includes an anode 1 , a cathode 5 , and a permeable separator 3 disposed between the anode 1 and the cathode 5 . The material of the cathode 5 includes Li x Co y N z O 2 nanoparticles, which can be prepared by sintering and other methods. The particle diameter of the Li x Co y N z O 2 nanoparticles is 10 nanometers to 100 nanometers, where x, y, The numerical value of z may satisfy the stoichiometric ratio. Because of the characteristics of large specific surface area and high chemical activity, nanoparticles are easy to react, which is beneficial to the intercalation and deintercalation of lithium ions. The permeable isolation membrane 3 connects the anode 1 and the cathode 5, and separates the anode 1 and the cathode 5. It is a porous structure with a small pore size and can pass ions, and the permeable isolation membrane is non-conductive. Generally, polyethylene, polypropylene or Polystyrene material.

请参见图2，为在基底10表面生成的碳纳米管阵列12的示意图。一般而言，生成碳纳米管阵列12的方法是化学气相沉积(CVD)法，其包括下列步骤：在硅基底10表面形成金属催化剂(未图示)，如铁、钴、镍或其氧化物，经退火处理形成催化剂纳米颗粒(未图示)，通入乙烯或乙炔等碳源气，加热到生长温度(如630～700℃)，在催化剂纳米颗粒的生长点逐渐生长出碳纳米管(图未标示)，形成碳纳米管阵列12。以CVD法生长的碳纳米管阵列12均为多壁碳纳米管，其直径与密度取决于催化剂颗粒的大小与密度，可通过控制退火过程而实现，碳纳米管阵列12的高度可通过控制生长时间而定，一般可达数十微米甚至更高。Please refer to FIG. 2 , which is a schematic diagram of the carbon nanotube array 12 formed on the surface of the substrate 10 . In general, the method for generating the carbon nanotube array 12 is a chemical vapor deposition (CVD) method, which includes the following steps: forming a metal catalyst (not shown), such as iron, cobalt, nickel or its oxides, on the surface of the silicon substrate 10 , form catalyst nanoparticles (not shown) after annealing treatment, pass through carbon source gas such as ethylene or acetylene, heat to the growth temperature (such as 630-700 ° C), and gradually grow carbon nanotubes at the growth point of catalyst nanoparticles ( The figure is not marked), and the carbon nanotube array 12 is formed. The carbon nanotube arrays 12 grown by CVD are all multi-walled carbon nanotubes, and their diameter and density depend on the size and density of the catalyst particles, which can be achieved by controlling the annealing process. The height of the carbon nanotube arrays 12 can be controlled by growing Depending on the time, generally up to tens of microns or even higher.

如图3所示，为本发明第一实施例的阳极示意图。锂离子电池从外形上可分为圆柱形及方形，本实施例即可满足方形锂离子电池的需要。该阳极为方形电极，是由上述图1的碳纳米管阵列12移植至一方形基板11而成，移植时将硅基底10去除，仅将碳纳米管阵列12移至基板11表面，其中碳纳米管22为多壁碳纳米管，其外管径为10至100纳米，相邻碳纳米管22的间距为20至500纳米。当锂离子嵌入碳纳米管阵列12，其可存储于碳纳米管22及各碳纳米管22间的空隙内。基板11为金属板，其具有一平整表面，使得碳纳米管阵列12与该表面良好接触。基板11提供阳极1与外电路(未图示)的电连接，电流可通过此基板11在锂离子电池与外电路之间传输。As shown in FIG. 3 , it is a schematic diagram of the anode of the first embodiment of the present invention. Lithium-ion batteries can be divided into cylindrical and square in shape, and this embodiment can meet the needs of square lithium-ion batteries. The anode is a square electrode, which is formed by transplanting the carbon nanotube array 12 of FIG. The tubes 22 are multi-walled carbon nanotubes with an outer diameter of 10 to 100 nanometers, and the distance between adjacent carbon nanotubes 22 is 20 to 500 nanometers. When lithium ions are intercalated into the carbon nanotube array 12 , they can be stored in the carbon nanotubes 22 and the gaps between the carbon nanotubes 22 . The substrate 11 is a metal plate with a flat surface, so that the carbon nanotube array 12 is in good contact with the surface. The substrate 11 provides an electrical connection between the anode 1 and an external circuit (not shown), and current can be transmitted between the lithium-ion battery and the external circuit through the substrate 11 .

请参见图4，本发明第二实施例的阳极示意图，为一圆形电极，可适于圆柱形锂离子电池。其包括一具有平整表面的圆形基板11’及由碳纳米管22组成的碳纳米管阵列12，其中碳纳米管阵列12可由上述图1的碳纳米管阵列12经裁剪为圆形后移植而得，也可在圆形硅基底上生成圆形碳纳米管阵列移植而得，移植时将硅基底10去除，仅将碳纳米管阵列12移至金属基板11’的平整表面，以实现碳纳米管阵列12与基板11’的良好接触。基板11’提供阳极与外电路的电连接，电流可通过此基板11’在锂离子电池与外电路之间传输。Please refer to FIG. 4 , which is a schematic diagram of the anode according to the second embodiment of the present invention. It is a circular electrode, which is suitable for a cylindrical lithium-ion battery. It includes a circular substrate 11' with a flat surface and a carbon nanotube array 12 composed of carbon nanotubes 22, wherein the carbon nanotube array 12 can be transplanted after the carbon nanotube array 12 in FIG. 1 is cut into a circle. It can also be obtained by transplanting a circular carbon nanotube array on a circular silicon substrate. During transplantation, the silicon substrate 10 is removed, and only the carbon nanotube array 12 is moved to the flat surface of the metal substrate 11' to realize carbon nanotube arrays. Good contact of the tube array 12 with the substrate 11'. The substrate 11' provides the electrical connection between the anode and the external circuit, and current can be transmitted between the lithium-ion battery and the external circuit through the substrate 11'.

请参见图5，为碳纳米管22的示意图。碳纳米管22是多壁碳纳米管，由多个不同直径的同轴碳管(图未标示)相套而成，各同轴碳管为一石墨层卷绕而成，其结构与石墨层相同，其最内层碳管内以及各同轴碳管之间均可嵌入锂离子，锂离子嵌入电势与石墨相同，但因其为中空多壁结构，所以可嵌入锂离子数量远比同等质量石墨多。Please refer to FIG. 5 , which is a schematic diagram of carbon nanotubes 22 . Carbon nanotubes 22 are multi-walled carbon nanotubes, which are formed by a plurality of coaxial carbon tubes (not shown) with different diameters. Similarly, lithium ions can be embedded in the innermost carbon tube and between the coaxial carbon tubes. The lithium ion insertion potential is the same as that of graphite, but because of its hollow multi-wall structure, the amount of lithium ions that can be embedded is much larger than that of graphite with the same mass. many.

本发明锂离子电池的电解液溶剂可为碳酸丙烯脂(Propylene Carbonate，PC)、碳酸乙烯酯(Ethylene Carbonate，EC)或碳酸二甲酯(Dimethyl Carbonate，DEC)等，电解液溶质可为LiPF6、LiBF4或LiClO4等。The electrolyte solvent of lithium ion battery of the present invention can be propylene carbonate (Propylene Carbonate, PC), ethylene carbonate (Ethylene Carbonate, EC) or dimethyl carbonate (Dimethyl Carbonate, DEC) etc., and electrolyte solute can be LiPF6 , LiBF 4 or LiClO 4 etc.

本发明锂离子电池还可有其它变化设计，例如：将多个碳纳米管阵列并排放置，以增加阳极的面积，或将二层或多于二层的碳纳米管阵列堆叠一起，增加阳极的高度，相应改变阴极的大小以适应阳极，即可改变锂离子电池的容量；亦可改变各碳纳米管的管径大小及其间距，及改变电解液的组成，或改变渗透隔离膜，使锂离子顺畅通过等等，均是从本发明易于思及的变化。Lithium-ion battery of the present invention also can have other variation design, for example: a plurality of carbon nanotube arrays are placed side by side, to increase the area of anode, or two-layer or more than two-layer carbon nanotube arrays are stacked together, increase the anode. Height, correspondingly change the size of the cathode to adapt to the anode, you can change the capacity of the lithium-ion battery; you can also change the diameter and spacing of each carbon nanotube, and change the composition of the electrolyte, or change the permeable separator, so that lithium The smooth passage of ions, etc., are all variations easily conceivable from the present invention.

Claims (10)

1. lithium ion battery, it comprises anode, negative electrode and osmotic isolating film, wherein anode links to each other by described osmotic isolating film with negative electrode, it is characterized in that: described anode comprises first carbon nano pipe array that is formed by multi-walled carbon nano-tubes, and described negative electrode comprises Li xCo yNi zO 2Nano particle, its particle diameter are 10 nanometer to 100 nanometers.
2. lithium ion battery according to claim 1 is characterized in that it further comprises one second carbon nano pipe array and parallel being arranged side by side of described first carbon nano pipe array.
3. lithium ion battery according to claim 1 is characterized in that it comprises that further one second carbon nano pipe array is stacked on the described first carbon nano pipe array surface.
4. lithium ion battery according to claim 1, the diameter that it is characterized in that described multi-walled carbon nano-tubes are 10 nanometer to 100 nanometers.
5. lithium ion battery according to claim 1, the spacing that it is characterized in that adjacent multi-walled carbon nano-tubes are 20 nanometer to 500 nanometers.
6. lithium ion battery according to claim 1 is characterized in that can embedding lithium ion in the multi-walled carbon nano-tubes.
7. lithium ion battery according to claim 6 is characterized in that described multi-walled carbon nano-tubes comprises that a plurality of coaxial graphite linings are nested and forms, and lithium ion can embed in this graphite linings or between the graphite linings.
8. lithium ion battery according to claim 1 is characterized in that lithium ion embeds between the adjacent multi-walled carbon nano-tubes.
9. lithium ion battery according to claim 1 is characterized in that carbon nano pipe array is to prepare by chemical vapour deposition technique.
10. lithium ion battery according to claim 1 is characterized in that Li xCo yNi zO 2Nano particle is to prepare by sintering process.
CNA031135129A 2003-01-03 2003-01-03 A lithium ion battery Pending CN1516304A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101315974B (en) * 2007-06-01 2010-05-26 清华大学 Lithium-ion battery negative electrode and preparation method thereof
CN101192493B (en) * 2006-11-22 2011-02-02 鸿富锦精密工业（深圳）有限公司 Anode device and its producing method
CN101517815B (en) * 2006-11-15 2012-02-01 丰田自动车株式会社 Method for manufacturing lithium rechargeable battery, and lithium rechargeable battery
CN109300704A (en) * 2013-03-15 2019-02-01 伟尔斯达生物催化有限责任公司 Methods of making nanofiber electrodes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101517815B (en) * 2006-11-15 2012-02-01 丰田自动车株式会社 Method for manufacturing lithium rechargeable battery, and lithium rechargeable battery
CN101192493B (en) * 2006-11-22 2011-02-02 鸿富锦精密工业（深圳）有限公司 Anode device and its producing method
CN101315974B (en) * 2007-06-01 2010-05-26 清华大学 Lithium-ion battery negative electrode and preparation method thereof
CN109300704A (en) * 2013-03-15 2019-02-01 伟尔斯达生物催化有限责任公司 Methods of making nanofiber electrodes

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