Application of D-tartaric acid cyclodimethyl sulfate in lithium ion battery electrolyte

Abstract

The invention discloses an application of D-tartaric acid cyclodimethyl sulfate in a lithium ion battery electrolyte. The structural formula of the D-taric acid cyclodimethyl sulfate is shown as a formula (I) in the specification. The D-taric acid cyclodimethyl sulfate is used as an additive of the lithium ion battery electrolyte, can improve the high-temperature cycle performance and the low-temperature charging performance of the lithium ion battery, and has relatively good application prospects in the technical field of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to the application of a kind of D-tartrate cyclic dimethyl sulfate in lithium ion battery electrolyte. Background technique [0002] Lithium-ion batteries have developed rapidly because of their advantages such as high specific energy, high battery voltage, wide operating temperature range, long storage life, no memory effect, low self-discharge rate, and fast charge and discharge. At present, lithium-ion batteries have been widely used In electronic products such as mobile phones, notebook computers, and digital cameras, they are also used as power batteries in electric bicycles, model airplanes, and electric vehicles. During the use of lithium-ion batteries, it has always been the focus of research by battery scientists to take into account the performance at high and low temperatures. Generally speaking, batteries with good performance at room temperature can only t...

AI Technical Summary

Problems solved by technology

During the use of lithium-ion batteries, it has always been the focus of research by battery scientists to take into account the performance at high and low temperatures. Generally speaking, batteries with good performance at room temperature can only take into account good low-temperature performance or high-temperature performance, which is difficult. Achieve both high and low temperature

The main reason is that the liquid temperature window of the lithium-ion battery electrolyte is narrow, which cannot take into account the thermal stability and electrochemical stability at high and low temperatures. When the temperature rises, the lithium-ion battery shows a higher initial capacity, but the battery The cycle stability of the battery is reduced, and the rate of capacity decay is accelerated. Therefore, the cycle stability of the battery at high temperature is also very important.

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