Method for improving electrode stability of aqueous electrolyte battery and aqueous electrolyte capacitor

A water-based electrolyte and capacitor technology, which is applied in the direction of hybrid capacitor electrodes, battery electrodes, electrode carriers/collectors, etc., can solve the problems of poor electrode stability, battery cycle stability and cycle life decline, and achieve good machining performance, The effect of improving the ability to collect electrons and excellent electrical conductivity

Inactive Publication Date: 2015-09-02
哈尔滨天宝石墨科技发展有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the electrodes made of traditional metal current collectors for water-based electrolyte batteries and water-based electrolyte capacitors have poor stability, which leads to a decrease in the cycle stability and cycle life of the batteries, and provides an improved water-based electrolyte battery and Method for Electrode Stability of Aqueous Electrolyte Capacitor

Method used

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  • Method for improving electrode stability of aqueous electrolyte battery and aqueous electrolyte capacitor
  • Method for improving electrode stability of aqueous electrolyte battery and aqueous electrolyte capacitor
  • Method for improving electrode stability of aqueous electrolyte battery and aqueous electrolyte capacitor

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specific Embodiment approach 1

[0020] Specific embodiment 1: The method of this embodiment to improve the electrode stability of water-based electrolyte batteries and water-based electrolyte capacitors is specifically modified with flexible graphite paper or conductive polymers in secondary battery systems or capacitors in which an aqueous solution is used as the electrolyte. The graphite-based material is used as the current collector to support the active material of the electrode material.

[0021] In this embodiment, the water-based electrolyte battery refers to a battery that uses an electrolyte solution composed of water as a solvent as the electrolyte; a water-based electrolyte capacitor refers to a capacitor that uses an electrolyte solution composed of water as a solvent as the electrolyte.

[0022] In this embodiment, ultra-thin flexible graphite paper or conductive polymer modified graphite material is used as the positive and negative current collector materials for water-based electrolyte batteries a...

specific Embodiment approach 2

[0023] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the aqueous solution refers to a solution formed by dissolving lithium, sodium, magnesium, zinc, and copper sulfate, chloride, nitrate, or chlorate in water. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that the secondary battery system refers to a sodium ion battery, a lithium ion battery, a magnesium ion battery, a zinc ion battery, or a copper ion battery. Others are the same as the first or second embodiment.

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Abstract

The invention provides a method for improving the electrode stability of an aqueous electrolyte battery and an aqueous electrolyte capacitor, relates to methods for stability of batteries and capacitors, and aims at solving the problem that an existing electrode current collector is poor in stability and short in service life. According to the method, ultrathin flexible graphite paper or a conducting polymer modified graphite material is used as a positive and negative electrode current collector material of the aqueous electrolyte battery and the aqueous electrolyte capacitor; on one hand, an ultrathin flexible graphite paper coiled material is used for preparing the current collector, so that the continuous production of electrode plates can be realized; on the other hand, a conducting polymer on the surface of the ultrathin flexible graphite paper is modified, so that the problem that the electrode material is in uniform coating caused by the fact that the hydrophilia of the graphite paper is poor is solved. The method can be used in the fields of the aqueous electrolyte batteries and the aqueous electrolyte capacitors.

Description

Technical field [0001] The invention relates to a method for improving the stability of the electrodes of batteries and capacitors. Background technique [0002] At present, energy storage batteries using aqueous solutions as electrolytes have attracted widespread attention because they can achieve low-cost, high-safety and environmentally friendly requirements for batteries while maintaining a considerable specific capacity. However, the selection of the electrode current collector material by the aqueous electrolyte is more demanding. Common current collectors are mainly metal materials, such as lead, aluminum, copper, foamed nickel, foamed copper, stainless steel, platinum, etc., because these metal materials are easily processed into foils, plates, grids and other shapes and have good electrical conductivity. However, in acidic, alkaline, or even neutral water electrolytes, and under the action of electrochemical oxidation and reduction, these metal current collectors are pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01G11/32
CPCH01G11/32H01M4/663Y02E60/10
Inventor 曹殿学邢涛
Owner 哈尔滨天宝石墨科技发展有限公司
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