A lithium titanate battery with high cycle performance

A lithium titanate battery, cycle performance technology, applied in the direction of secondary batteries, battery components, electrolyte battery manufacturing, etc. Overcome and other problems, to achieve the effect of not being flatulent, improving safety performance, and solving flatulence
CN105470574BActive Publication Date: 2018-05-18WANXIANG 123 CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
WANXIANG 123 CO LTD
Publication Date
2018-05-18

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Abstract

The invention relates to the technical field of lithium ion batteries. In order to solve the problem of low cycle performance of the existing lithium titanate battery, the invention provides a lithium titanate battery with high cycle performance, which includes a positive electrode sheet, a negative electrode sheet, a diaphragm, and an electrolyte. and outer packaging, the active material on the positive electrode sheet is a ternary material, the active material on the negative electrode sheet is lithium titanate, the solvent of the electrolyte solution is organic carbonate, the electrolyte solution contains lithium salt, the electrolyte solution It also contains electrolyte additives and gas eliminators. The electrolyte additives contain ammonium percyanate and succinic acid. The diaphragm is a microporous film diaphragm or a non-woven diaphragm. Polyolefin or polyethylene terephthalate of stone particles and carboxymethyl cellulose fibers. The lithium titanate battery in the present invention is not easy to produce flatulence, has good cycle performance, and the diaphragm has good wettability and moisturizing performance for the electrolyte, and the present invention is suitable for use as a power battery.
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Description

technical field

[0001] The invention relates to the technical field of lithium ion batteries, in particular to a battery with high cycle performance using lithium titanate as a negative electrode material. Background technique

[0002] At present, most commercial lithium-ion battery anode materials use various lithium-intercalated carbons and graphites. However, carbon-containing negative electrode materials have some disadvantages, such as the formation of a passivation film on the surface during the first cycle, which greatly consumes lithium ions in the positive electrode material, resulting in a large capacity loss; the potential of the carbon negative electrode is very close to that of lithium. Nearly, when the battery is overcharged, metal lithium may precipitate on the surface of the carbon electrode and cause safety problems; the speed of releasing energy is not fast enough, and it is not suitable for devices that require instantaneous high current. Lithium titanium...

Claims

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