Graphene lithium ion battery electrolyte

Abstract

The invention relates to technical fields of graphene preparation and graphene application, and specifically to a graphene lithium ion battery electrolyte. The graphene lithium ion battery electrolytecomprises the components in parts by mass: 120-220 parts of organic solvent, 14-33 parts of lithium salt, 5-10 parts of additives and 10-15 parts of graphene, wherein the additives comprise a flame-retardant additive, a film-forming additive and a low-temperature additive; and the flame-retardant additive adopts a graphene-molybdenum oxide nanometer flame-retardant composite material. The graphene lithium ion battery electrolyte is high in safety and high-low-temperature performance.

Description

technical field [0001] The invention relates to the technical field of graphene preparation and graphene application, in particular to a graphene lithium ion battery electrolyte. Background technique [0002] Lithium-ion batteries have the advantages of high voltage platform and no memory performance, and are currently widely used in portable electronic devices such as mobile phones, laptop computers, and large and medium-sized electric devices such as power tools and electric bicycles. However, there are still a series of problems in lithium batteries, mainly in: (1) poor high and low temperature performance. Batteries with good battery performance at room temperature can only be used at low temperature or at high temperature, but they cannot be used at the same time. The temperature window of the electrolyte of lithium-ion batteries is too narrow to take into account both high and low temperature performance. In particular, the electrolyte loses capacity rapidly at high t...

AI Technical Summary

Problems solved by technology

However, there are still a series of problems in lithium batteries, mainly in: (1) poor high and low temperature performance

Batteries with good battery performance at room temperature can only be used at low temperature or at high temperature, but they cannot be used at the same time. The temperature window of the electrolyte of lithium-ion batteries is too narrow to take into account both high and low temperature performance.

In particular, the capacity of the electrolyte is lost rapidly at high temperatures, and the cycle performance is poor, which cannot meet the needs of power batteries that often work under high temperature conditions.

(2) Poor safety performance: In recent years, incidents such as explosions and fires of lithium-ion batteries have occurred frequently, resulting in safety issues that have become an urgent problem to be solved in the deepening and large-scale development of lithium-ion batteries

The electrolyte carries the transportation of lithium ions between the positive and negative electrodes, and the organic solvent in the electrolyte is usually volatile and has a low flash point, which makes the electrolyte prone to combustion and explosion when the battery is abused or heated