Unlock instant, AI-driven research and patent intelligence for your innovation.

Electrode, electrochemical device, and method of making electrode

A manufacturing method and electrode technology, applied in electrode manufacturing, electrochemical generator, electrode rolling/calendering, etc., can solve the obstacles of high output or high energy density of electrochemical devices, high internal resistance of electrochemical devices, contact The problem of high resistance can reduce the contact resistance, reduce the number of processes, and reduce the cost.

Active Publication Date: 2005-11-02
TDK CORPARATION
View PDF1 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it was found that the electrode manufactured by the above method has a relatively high contact resistance between the particles containing the active material and the current collector.
When this type of electrode is used in an electrochemical device, the internal resistance of the electrochemical device becomes high, so it may hinder the high output or high energy density of the electrochemical device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrode, electrochemical device, and method of making electrode
  • Electrode, electrochemical device, and method of making electrode
  • Electrode, electrochemical device, and method of making electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0139] Here, first, an electrode for an electric double layer capacitor is prepared.

[0140] (1) Preparation of composite particles

[0141] First, the composite particles 250 used in the production of the active material-containing layer of each electrode for an electric double layer capacitor were produced in the following procedure. Here, the composite particles 250 are composed of a cathode or anode active material (90% by mass), conductive additive particles (5% by mass), and a binder (5% by mass).

[0142] Activated carbon (average particle diameter: 15 μm) was used as the active material (particles containing the active material) for the cathode and anode. In addition, carbon black (acetylene black) was used as a conductive aid. Furthermore, polyvinylidene fluoride (PVDF) is used as an adhesive.

[0143] First, a "raw material solution" in which carbon black was dispersed in a solution of polyvinylidene fluoride dissolved in N,N-dimethylformamide as a solvent (3% by...

Embodiment A2、A3

[0152] Except making roll line pressure be 200 * 10 in embodiment A2, A3 2 N / m, 2000×10 2 Except for N / m, others are the same as in Example A1.

Embodiment A4

[0154] In Example A4, a lithium ion secondary battery was prepared. As the anode, the same electrode as in Example A1 was used. On the other hand, the cathode was produced by performing the same hot roll processing as in Example A1 using the following composite particles and the following current collector.

[0155] Use of LiCoO as particles containing active material 2 Composite particles were produced in the same manner as in Example A1 for particles (average particle diameter: 0.5 mm), acetylene black (electrochemical black) as a conductive additive, and polyvinylidene fluoride (PVDF) as a binder. The particle size of the composite particles was 200 μm. In addition, the constituent ratio of the composite particle was the particle containing an active material (90 mass %), the conductive additive particle (7 mass %), and the binder (3 mass %).

[0156] The current collector was an aluminum foil (thickness: 20 μm), and an aluminum foil on which a conductive resin layer (th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

An electrode comprises a planar collector, and an active material containing layer disposed on the collector. The active material containing layer comprises a plurality of particles containing an active material, and a binder for binding the particles containing the active material to each other and the particles containing the active material to the collector. The collector has a surface depressed in conformity to a form of the particles containing the active material.

Description

technical field [0001] The present invention relates to electrodes that can be used in electrochemical devices such as primary batteries, secondary batteries (especially lithium ion secondary batteries), electrolytic batteries, capacitors (especially electrochemical capacitors), electrochemical devices equipped with the electrodes, and electrodes. Production method. Background technique [0002] Electrochemical devices such as high-energy batteries such as lithium-ion secondary batteries or electrochemical containers such as electric double layer capacitors are widely used in portable devices and the like. This type of electrochemical device mainly includes a pair of electrodes and an electrolyte (such as a liquid electrolyte or a solid electrolyte) interposed between the electrodes. [0003] In electrodes of such electrochemical devices, an active material-containing layer is usually laminated on a plate-shaped current collector, and the active material-containing layer in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25D17/10H01G9/042H01G9/058H01M4/02H01M4/04H01M4/139H01M4/70H01M10/0525H01M10/36
CPCH01M4/0471H01G9/042H01G11/28H01M10/0525H01G11/42H01M4/0435H01M4/70Y02E60/122Y02E60/13H01G11/38H01M4/139H01M2004/021H01G9/058Y10T29/49002Y02E60/10
Inventor 铃木忠铃木长栗原雅人丸山哲
Owner TDK CORPARATION