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Lithium titanate battery and its electrolyte

A lithium titanate battery, electrolyte technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of easy flatulence of batteries, and achieve the effect of inhibiting gas production

Active Publication Date: 2015-09-16
ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, it is found that the battery with lithium titanate as the negative electrode is easy to swell at high temperature, and this phenomenon is especially obvious for flexible packaging batteries.

Method used

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  • Lithium titanate battery and its electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The lithium titanate battery of the present invention includes a positive electrode material, a negative electrode material and an electrolyte, the negative electrode material is lithium titanate, the electrolyte includes a lithium salt, an organic solvent and an additive, and the lithium salt can be lithium hexafluorophosphate (LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ), lithium bistrifluoromethanesulfonimide (LiN(CF 3 SO 2 ) 2 ) in any one or a combination of several of them, the concentration can be 0.5M-1.5M, what is used in this embodiment is lithium hexafluorophosphate with a concentration of 1M, and ethylene carbonate with a weight ratio of 1:1:1 ester (EC), diethyl carbonate (DEC) and ethyl methyl carbonate (EMC) as an organic solvent, and based on 100 parts by weight of the lithium salt and the organic solvent, add 1 part by weight of bis Lithium oxalate borate is used as the additive.

Embodiment 2

[0014] Others are the same as in Example 1, the additives are 1 part by weight of lithium difluorooxalate borate, 1 part by weight of lithium bisoxalate borate, and 3 parts by weight of 1,3-propane sultone.

Embodiment 3

[0016] Others are the same as in Example 1, the additives are 2 parts by weight of lithium difluorooxalate borate, and 0.5 parts by weight of 1,3-propane sultone.

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Abstract

The invention discloses a lithium titanate battery and an electrolyte for the lithium titanate battery, and aims to provide the lithium titanate battery and the electrolyte for the lithium titanate battery which can prevent the swelling of a battery at a high temperature by inhibiting the aerogenesis of the lithium titanate battery. The lithium titanate battery comprises an anode material and the electrolyte; the anode material is lithium titanate; the electrolyte comprises a lithium salt, an organic solvent and additives; the additives comprise one or combinations of lithium bis(oxalate) borate (LiBOB), lithium difluoroborate (LiODFB) and 1,3-propane suhone (PS); and the using mass of the additives is equal to 1 to 5% of total mass of the lithium salt and the organic solvent. The lithium titanate battery can be widely applied to the field of lithium titanate batteries.

Description

technical field [0001] The invention relates to a lithium titanate battery and its electrolytic solution. 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. Therefore, it is necessary to find new anode materials that can intercalate lithium at a slightly positive potential than carbon anodes, are cheap, easy to obtain, safe and reliable. Among the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M4/485
CPCY02E60/122Y02E60/10
Inventor 许杰戴晓兵
Owner ZHUHAI SMOOTHWAY ELECTRONICS MATERIALS