Lithium titanate battery electrolyte and lithium titanate battery

Abstract

The invention relates to the technical field of batteries and particularly relates to lithium titanate battery electrolyte and a lithium titanate battery. The lithium titanate battery electrolyte is composed of a lithium salt and an organic solvent; the organic solvent is prepared from the following raw materials: 10wt%-99.9wt% of a nitrile solvent, 0wt%-89wt% of an auxiliary solvent and 0.1wt%-5wt% of an additive. The nitrile solvent does not have a side reaction with a rock-salt-phase Li7Ti5O12 material at a charging state, and certain catalysis reactions which occur in the presence of carbonyl or hydroxyl can be effectively avoided; the decomposition of the electrolyte is reduced and the probability of producing gas by lithium titanate is reduced; a gas swelling phenomenon in the lithium titanate battery is reduced, so that the storage and circulating properties of the lithium titanate battery are improved. The lithium titanate battery provided by the invention takes the lithium titanate with relatively high electric potential as an electric potential negative electrode and the side reactions of the electrolyte and the electrode can be avoided, so that the stability of the lithium titanate battery electrolyte is enhanced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium titanate battery electrolyte and a lithium titanate battery. Background technique [0002] In the prior art, the lithium titanate material is used as the negative electrode material in the battery. Due to its own characteristics, the interaction between the material and the electrolyte is easy to occur and gas is precipitated during the charge-discharge cycle reaction process. Therefore, ordinary titanium Lithium-acid batteries are prone to flatulence, resulting in bulging of the battery cells, and a significant drop in electrical performance, which greatly reduces the theoretical cycle life of lithium titanate batteries. The test data shows that ordinary lithium titanate batteries will be flattened during the cycle, resulting in failure to use normally, which is also an important reason restricting the large-scale application of lithium titanate batteries. Contents...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the lithium titanate material is used as the negative electrode material in the battery. Due to its own characteristics, the interaction between the material and the electrolyte is easy to occur and gas is precipitated during the charge-discharge cycle reaction process. Therefore, ordinary titanium Lithium-acid batteries are prone to flatulence, resulting in bulging of the battery cells, and a significant drop in electrical performance, which greatly reduces the theoretical cycle life of lithium titanate batteries

The test data shows that ordinary lithium titanate batteries will be flattened during the cycle, resulting in failure to use normally, which is also an important reason restricting the large-scale application of lithium titanate batteries