As a new generation of chemical storage battery, lithium-ion battery has high working voltage, large volume and weight energy density, stable charge discharge voltage platform, long service time, low temperature resistance and environmental friendliness. It has been widely used in notebook computers, mobile communications, electric toys, visual wearable products and other fields. In recent years, with the intensification of energy crisis and environmental pollution, with the vigorous promotion of the state, it will become the preferred power supply for electric vehicles. Carbon negative electrode materials include graphite and non graphite (such as lithium titanate). Graphite negative electrode has the advantages of low lithium embedding potential (< 1.0vvsli / Li), high lithium embedding capacity, good conductivity, high safety and low price. It is the mainstream negative electrode material of commercial lithium-ion battery at present.

However, due to the structural defects of graphite negative electrode materials, it has poor matching with the electrolyte. In the process of charge and discharge, it is easy to co embed with propylene carbonate organic solvent in the electrolyte, resulting in structural damage, which affects the cycle stability and charge and discharge efficiency of the battery. At the same time, the anisotropic structure of graphite affects the diffusion direction of lithium ions in the graphite structure and limits the specific capacity of graphite cathode material. These problems hinder the application of carbon anode materials in electronic mobile devices, electric vehicles and other fields. As a kind of carbon anode materials, hard carbon (HC) has isotropic structure characteristics, larger layer spacing than graphite, and fast lithium ion diffusion during charging, which makes it have better rate performance. At the same time, hard carbon material also has the advantages of good cycle performance, low price and high safety. It has attracted people's attention in the fields of electric vehicles and so on.

Acey new energy provides hard carbon raw material powder for the negative electrode of lithium ion battery.