Aqueous electrolyte, aqueous metal ion battery and preparation method thereof

A water-based electrolyte and metal ion technology, applied in alkaline electrolytes, aqueous electrolytes, secondary batteries, etc., can solve problems such as battery failure, punctured diaphragm, short circuit, etc., to suppress deflagration, reduce capacity decay and improve uniformity effect

Active Publication Date: 2020-09-11
北京恩力动力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the number of cycles increases, the dendrites continue to grow towards the positive side, eventually piercing the separator, causing a short circuit and causing the battery to fail

Method used

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  • Aqueous electrolyte, aqueous metal ion battery and preparation method thereof
  • Aqueous electrolyte, aqueous metal ion battery and preparation method thereof
  • Aqueous electrolyte, aqueous metal ion battery and preparation method thereof

Examples

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Effect test

preparation example Construction

[0030] The preparation method of using the above-mentioned water-based electrolyte to form a water-based metal ion battery comprises the following steps:

[0031] (1) The active material of the positive electrode, the conductive agent, and the binder are mixed evenly by high-speed stirring, ball milling or kneading, and then evenly coated on the positive electrode current collector by coating, pulping or kneading, and dried to obtain The positive electrode film attached to the positive electrode current collector is used as the positive electrode; the active material of the negative electrode, the conductive agent, and the binder are mixed evenly by high-speed stirring, ball milling or kneading, and then coated, pulped or opened. The method is to apply evenly on the negative electrode current collector, and dry to obtain the negative electrode film attached to the negative electrode current collector, which is used as the negative electrode; (2) The prepared positive electrode,...

Embodiment 1

[0034] Lithium manganate, conductive carbon black, and binder are mixed evenly by kneading in a mass fraction ratio of 8:1:1, wherein the binder is polytetrafluoroethylene; The method is evenly compacted on the stainless steel net, and dried to obtain the positive electrode film, which is used as the positive electrode; the metal-modified zinc powder (99% of the zinc powder, the rest is Bi and In), the conductive agent and the binder are mixed by kneading. Mix evenly according to the mass fraction ratio of 8:1:1, wherein the conductive agent is a mixture of conductive carbon black, carbon nanotubes and activated carbon, and the binder is polytetrafluoroethylene; Evenly compacted on the stainless steel mesh by the practice method, and dried to obtain the negative electrode film, which was used as the negative electrode.

[0035] Mix zinc sulfate, lithium sulfate and deionized water, stir magnetically for 15 minutes, then add propylene glycol additive, and stir for 1 hour to pre...

Embodiment 2

[0037] Lithium manganate, conductive carbon black, and binder are mixed evenly by kneading in a mass fraction ratio of 8:1:1, wherein the binder is polytetrafluoroethylene; The method is evenly compacted on the stainless steel net, and dried to obtain the positive electrode film, which is used as the positive electrode; the metal-modified zinc powder (99% of the zinc powder, the rest is Bi and In), the conductive agent and the binder are mixed by kneading. Mix evenly according to the mass fraction ratio of 8:1:1, wherein the conductive agent is a mixture of conductive carbon black, carbon nanotubes and activated carbon, and the binder is polytetrafluoroethylene; Evenly compacted on the stainless steel net in the way of training, and dried to obtain the negative electrode film, which is used as the negative electrode;

[0038] Mix zinc sulfate, lithium sulfate and deionized water, stir magnetically for 15 minutes, then add pyridine additive, stir for 1 hour, the concentration o...

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Abstract

The invention provides an aqueous electrolyte, an aqueous metal ion battery and a preparation method thereof. The invention relates to the technical field of ion batteries, and provides an aqueous electrolyte with water as a solvent, water-soluble metal salt as a solute and one or more of C1-C10 alcohols, C1-C10 acids, pyridine and methanesulfonic acid as additives, and the mass fraction of the additives is 0.001%-10%. The aqueous electrolyte disclosed by the invention has flame-retardant and explosion-proof functions; safety accidents such as deflagration caused by thermal runaway of the battery in the overcharge and overdischarge process can be effectively inhibited; dendrite generated by the negative electrode in a metal electrodeposition reaction can be effectively inhibited, the uniformity of the electrodeposition reaction of the negative electrode is improved, capacity attenuation and battery failure caused by micro short circuit of the positive electrode and the negative electrode are reduced, and the cycling stability and the service life of the battery are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of ion batteries, in particular to an aqueous electrolyte, an aqueous metal ion battery and a preparation method thereof. Background technique [0002] With the increasing demand for efficient, clean and renewable energy in the global market, energy storage batteries have broad application prospects in distributed power stations, communication base stations, UPS / EPS, wind power, photovoltaic power generation, and power grid peak regulation and frequency regulation. At present, the batteries mainly used in the energy storage industry are lead-acid batteries and lithium-ion batteries. Although lead-acid batteries are cheap and have mature technology, they cause serious environmental pollution because they contain heavy metal lead and the wastewater that needs to be treated contains a large amount of sulfuric acid. Although the lithium-ion battery has superior performance, it has a hidden danger of deflagration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38H01M2300/0014Y02E60/10Y02P70/50
Inventor 杨鹏丁波曹翊李昌盛罗刚国车勇戴翔
Owner 北京恩力动力技术有限公司
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