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Secondary battery anode material

A negative electrode material and secondary battery technology, applied in the field of electrochemical energy storage, can solve problems such as battery design difficulties

Inactive Publication Date: 2017-01-04
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of traditional Zn / Zn 2+ electrodes, inevitably face the problem of zinc dendrites, making battery design very difficult

Method used

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  • Secondary battery anode material
  • Secondary battery anode material
  • Secondary battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 2

[0044] The preparation of embodiment 1 secondary battery

[0045] 1. Preparation of positive electrode sheet: LiMn 2 o 4 It is the positive electrode active material, according to the positive electrode active material 90%: Super-P (Special Conductive Agent Model for Lithium Batteries of Temegao Company) 6%: Adhesive SBR (Styrene Butadiene Rubber Latex) 2%: Thickener CMC (Carboxymethyl Sodium cellulose) 2% ratio, first mix CMC and a certain amount of water evenly, then add active material and conductive carbon black, stir for 2 hours, finally add SBR and stir for 10 minutes to obtain positive electrode slurry. The positive electrode current collector is a 150 mesh SUS304 stainless steel mesh, and the positive electrode slurry is evenly coated on the positive electrode current collector, cut into a size of 10mmX10mm, and a weight of 50mg. Dry at 120°C for 12 hours to form a positive electrode sheet.

[0046] 2. Preparation of negative electrode active material: 1Kg of commer...

Embodiment 2

[0052] The battery is manufactured in the same manner as in Example 1, except that the preparation method of the negative electrode active material is as follows:

[0053] Get 100 grams of sodium polyacrylate (molecular weight 10,000) and place it in 1L of deionized water, dissolve 400 grams of zinc sulfate in 1L of water, then pour it into the mixture of sodium polyacrylate and water, mix the solution for 10 hours, wash and filter, Then it is mixed with Super-P, PTFE emulsion (weight in dry state) and the ratio is 8:1:1, pressed into a pole piece, the mass per unit area is the same as that of the positive electrode, and the negative electrode is pasted on the zinc foil current collector.

[0054] The positive electrode of the battery uses the lithium manganate pole piece described in Example 1, the positive and negative electrode areas are the same, the mass ratio of positive and negative active materials is 1:1, and the electrolyte is a neutral lithium sulfate solution with p...

Embodiment 3

[0058] The battery is manufactured in the same manner as in Example 1, except that the preparation method of the negative electrode active material is as follows:

[0059] Get 100 grams of polyacrylic acid weak acid adsorption resin (DIAION WK10, a kind of methacrylic acid type weak acid cation exchange resin, the structure is as follows Figure 7 Shown below) crushed to 400-mesh sieve, 400 grams of zinc sulfate was dissolved in 1L of water, poured into the above resin powder, the solution was mixed for 10 hours, washed and filtered, and then mixed with Super-P, binder PTFE powder So that the ratio of 8:1:1 is mixed, hot pressed at 140 degrees to form a sheet, and pasted on the zinc foil current collector.

[0060] The positive electrode of the battery uses the lithium manganate pole piece described in Example 1, the size of the positive and negative pole pieces is the same, the mass ratio of the active material is 1:1, and the electrolyte is a neutral lithium sulfate solution...

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Abstract

The invention discloses a secondary battery anode material. The material comprises a framework, chelating / adsorption groups and active substances. The framework does not participate in electrochemical reaction and just provides carriers for the chelating / adsorption groups; the chelating / adsorption groups outer layer electrons of contained atoms such as N, S, P and O which have lone pair electrons and can form chelating or chemisoptive bonds (represented by iminodiacetic acid chelating groups in the drawing) along with divalent or multivalent metals; the active substances are divalent or multivalent metal ions which can be reduced into a lower-valence state. During charging, the metal ions used as the active substances are reduced into a lower-valence state or metal elementary substance state, and during discharging, metal ions can be reversibly produced and can form ionic bonds or coordination bonds along with the chelating / adsorption groups. The anode material can be matched with many cathode materials to form a battery. The battery anode disclosed by the invention is novel in principle and structure, and is very expected to be applied to electric automobiles and large-size energy storage projects due to low cost and high reliability.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a secondary battery negative electrode material. Background technique [0002] The current demand for energy storage technology far exceeds any time in human history. Whether it is new energy vehicles, or future wind energy, supporting solar power plants, or urban smart grids, all require a large number of reliable energy storage technologies. [0003] The current commercialized battery technology is mainly the old lead-acid battery that is harmful to the environment. The emerging lithium-ion battery has achieved great success in portable devices, but in the field of large-scale power or energy storage, due to the price, Factors such as safety are constrained. Therefore, it is a very urgent task to develop a safe and cheap rechargeable battery. [0004] In 1994, Wu Li from the research group of Jeff Dahn in Canada published an article named as VO in SC...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/36
CPCH01M4/36H01M4/62Y02E60/10
Inventor 颜竞
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