Negative electrode material of lithium ion battery and preparation method for negative electrode material

一种锂离子电池负极材料及其制备方法

Abstract

本发明公开了一种锂离子电池负极材料及其制备方法。其中,锂离子电池负极材料的制备方法包括:将高柔韧性聚合物与SiOx基活性物质混合均匀形成混合物,对混合物进行处理使得高柔韧性聚合物在SiOx基活性物质表面形成均一薄膜,得到锂离子电池负极材料。通过上述方式,本发明能够有效阻止活性物质之间的相互剥离和脱落,减小体积膨胀收缩,提高SiOx(0≤x≤2)基材料的比容量,从而有效改善SiOx(0≤x≤2)基材料的循环稳定性能。
The invention discloses a negative electrode material of a lithium ion battery and a preparation method for the negative electrode material. The preparation method of the negative electrode material of the lithium ion battery comprises the following steps of uniformly mixing a high-flexibility polymer and a SiOx based active substance to form a mixture; and processing the mixture to enable the high-flexibility polymer to form a uniform thin film on the surface of the SiOx based active substance to obtain the negative electrode material of the lithium ion battery. Through the above mode, the active substances can be effectively prevented from striping and dropping from each other, the volume expansion and shrinkage is reduced, the specific capacity of a SiOx (x is more than or equal to 0 and less than or equal to 2) based material is improved, and thus, the cycle stability performance of the SiOx (x is more than or equal to 0 and less than or equal to 2) based material is effectively improved.

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