Battery, battery pack and uninterruptable power supply

A battery and water-based electrolyte technology, applied in the field of electrochemical energy storage, can solve the problems of battery cycle performance, impact of charge and discharge capacity, dendrites, etc., to improve electrochemical performance and safety performance, increase cycle life, and reduce dendrites the formation of the effect

Inactive Publication Date: 2017-03-29
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The second metal ion of this type of battery can be zinc ion. At this time, the negative electrode active material is metal zinc. However, there are problems such as dendrites in this type of negative electrode active material when charging and discharging in aqueous solution, so that the cycle performance, charge and discharge capacity of the battery affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] In another embodiment, the zinc active material includes zinc and a zinc-containing compound, wherein the zinc-containing compound accounts for 0-50% by mass of the negative electrode material. The zinc-containing compound includes at least one of zinc oxide, zinc hydroxide, and zinc salt. Zinc salts include, but are not limited to, zinc sulfate, zinc chloride, zinc acetate, and zinc oxalate. Specifically, the preparation method of the negative electrode comprises the following steps:

[0054] Dispersing zinc and / or zinc-containing compounds and binders in water, stirring evenly to obtain negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector, drying, rolling, and shearing.

[0055] The sheared negative electrode is externalized. Specifically, the negative electrode and the nickel positive electrode are placed in a 2-7mol / L potassium hydroxide solution, charged at a constant voltage of 2.1V and a constant current of...

Embodiment 1-1

[0083] Preparation of positive electrode: Lithium manganate LMO, conductive agent graphite KS15, binder styrene-butadiene rubber (SBR) and sodium carboxymethyl cellulose (CMC) according to the mass ratio LMO:CMC:SBR:graphite=86.5:1:2.5: 10 mixed in water to form a homogeneous cathode slurry. The positive electrode current collector is graphite foil, and the positive electrode slurry is coated on the positive electrode current collector to form an active material layer, which is then pressed into sheets to make a positive electrode sheet. The thickness of the positive electrode sheet is 0.4mm, and the surface density of the positive electrode active material is 750g / m 2 .

[0084] Prepare negative electrode: mix zinc oxide and zinc active material, conductive agent acetylene black, additive bismuth oxide, indium oxide, lead oxide and calcium hydroxide, binder PTFE and HPMC, disperse in deionized water, and stir evenly to obtain negative electrode slurry The negative electrod...

Embodiment 1-2

[0089] In Example 1-2, the steps for preparing the positive electrode are the same as in Example 1-1.

[0090] Prepare negative electrode: mix zinc active material zinc, conductive agent acetylene black, additives indium oxide, lead oxide and calcium hydroxide, binder PTFE and HPMC, disperse in deionized water, stir evenly to obtain negative electrode slurry, and negative electrode slurry Coating on the negative electrode collector punched copper foil with a pore diameter of 0.8 mm and a thickness of 0.2 mm, drying, rolling and shearing to obtain a porous zinc negative electrode sheet. Wherein the weight percent of each component in the negative electrode material is: zinc 89%, acetylene black 2%, bismuth oxide 2%, indium oxide 1%, lead oxide 0.5%, calcium hydroxide 3%, PTFE 2%, HPMC 0.5%. The porous zinc negative electrode sheet has not undergone chemical formation.

[0091] Weigh a certain mass of zinc sulfate and lithium sulfate, add them to dissolve in water, and configur...

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Abstract

The present invention provides a battery, which comprises a positive electrode, a negative electrode and a water-based electrolytic solution, wherein the positive electrode comprises a positive electrode active substance and a positive electrode current collector, the water-based electrolytic solution comprises a first metal ion and/or a second metal ion, the first metal ion can be reversibly removed from-embedded into the positive electrode during a charging and discharging process, the second metal ion is subjected to reduction deposition at the negative electrode during a charging process to form a second metal, the second metal is oxidized and dissolved during a discharging process to form the second metal ion, the negative electrode comprises a negative electrode substance having a porous structure, and the negative electrode substance comprises a zinc active substance and a negative electrode binder. According to the present invention, the dendritic crystal problem of the battery negative electrode can be effectively improved, the cycle life of the battery can be increased, and the electrochemical performance and the safety performance of the battery can be improved.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a battery. [0002] The invention also relates to a battery pack comprising several batteries. [0003] The invention also relates to an uninterruptible power supply. Background technique [0004] Lead-acid batteries, which have been around for more than a hundred years, have mature battery technology and occupy an absolute market share in energy storage fields such as car starter batteries, electric bicycles, and UPS. Although the lead-acid battery has a low cycle life and a relatively low energy density, it has the advantages of very low price and high cost performance. Therefore, in recent years, nickel-metal hydride batteries, lithium-ion batteries, sodium-sulfur batteries, and flow batteries cannot replace lead-acid batteries in the field of energy storage. [0005] In recent years, a new type of aqueous secondary battery has emerged. The positiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/42H01M4/62H01M4/80
CPCH01M4/42H01M4/621H01M4/80H01M10/36Y02E60/10
Inventor 李如飞罗云峰陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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