Lithium titanate battery non-water electrolyte and lithium titanate battery

Abstract

The invention discloses a lithium titanate battery non-water electrolyte and a lithium titanate battery, and aims to provide the lithium titanate battery non-water electrolyte and the lithium titanate battery which can restrain the lithium titanate battery from generating gas to prevent the battery from gas expansion at a high temperature. The lithium titanate battery comprises a cathode material, an anode material and an electrolyte, wherein the anode material is lithium titanate; the electrolyte comprises lithium, an organic solvent and an additive; the additive is selected from at least one of difluoro bis(oxalato) lithium phosphate, tetra-fluoro (oxalato) lithium phosphate, tris-oxalate lithium phosphate, 1,8-naphthalene sulfonic acid lactone, and 1,3-propene sulfonic acid lactone; the use mass of the additive is equivalent to 1-5% of the total mass of the lithium and the organic solvent. The lithium titanate battery non-water electrolyte and the lithium titanate battery can be widely applied to the lithium titanate battery field.

Description

technical field [0001] The invention relates to a lithium titanate battery non-aqueous electrolyte and a lithium titanate battery. Background technique [0002] At present, most commercial lithium-ion battery anode materials are lithium-intercalated carbon materials. Since the potential of the carbon electrode after lithium intercalation is very close to that of metal lithium, when the battery is overcharged, metal lithium is easily precipitated on the surface of the carbon electrode, and it interacts with the electrolyte. The reaction produces a flammable gas mixture, thus causing a great safety hazard to the battery, especially the power battery. At the same time, the graphite electrode also has the problem of co-intercalation of the electrolyte, which will also affect the cycle stability of the electrode. Lithium titanate material is a high-performance, high-rate lithium secondary battery negative electrode material. In the process of Li intercalation or extraction, the...

AI Technical Summary

Problems solved by technology

[0002] At present, most commercial lithium-ion battery anode materials are lithium-intercalated carbon materials. Since the potential of the carbon electrode after lithium intercalation is very close to that of metal lithium, when the battery is overcharged, metal lithium is easily precipitated on the surface of the carbon electrode, and it interacts with the electrolyte. The reaction produces a flammable gas mixture, which poses a great safety hazard to batteries, especially power batteries

At the same time, graphite electrodes also have the problem of co-intercalation of the electrolyte, which will also affect the cycle stability of the electrode.

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