Lithium ion battery negative electrode material additive, lithium ion battery and negative electrode material thereof

Abstract

The invention relates to a lithium ion battery negative electrode material additive, a lithium ion battery and a negative electrode material thereof. The additive comes from a metabolic product generated by at least one of lactic acid bacteria, yeast, photosynthetic bacteria and gram negative bacteria through metabolism, and the generated metabolic product is a compound, the tail end or branched chain of which has a phosphate ion or an acetate ion. Adding of the additive provided in the invention in a lithium ion battery negative electrode material can effectively mitigate self discharge during lithium ion battery storage and high-temperature heat due to overcharge without affecting the original electrical performance of a lithium ion battery, and can maintain good battery cycle life.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a lithium ion battery negative electrode material additive using a biochemical molecular formula, and a lithium ion battery and negative electrode material using the additive. Background technique [0002] Batteries can be mainly divided into Primary Battery and Secondary Battery. The primary battery converts chemical energy into electrical energy, and cannot convert electrical energy into chemical energy through charging. Therefore, once the chemical substances inside the battery Disappeared, that is, can not continue to supply power, such as mercury batteries, carbon-zinc batteries, alkaline batteries, etc.; secondary batteries can continue to repeat through charging, such as nickel-cadmium batteries, nickel-metal hydride batteries and lithium-ion batteries. [0003] In addition, in recent years, secondary batteries can be widely used in a variety of portable electronic products, such a...

AI Technical Summary

Problems solved by technology

However, graphite or carbon materials are usually used as the negative electrode in soft-pack lithium-ion batteries. Since it is easy to contain impurities of natural components, the lithium ions in the carbon material negative electrode after charging will form complexes with impurities, resulting in lithium-ion batteries. The overall impedance increases and internal self-discharge occurs, which reduces the storage life of the battery

In addition, the lithium cobalt oxide compound is the main conductive substance in the positive electrode of lithium-ion batteries. Due to its high energy density characteristics, when overcharging, it may cause the battery to heat up and even explode.

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