CMC is generally classified according to different degree of substitution (Ds), and the product morphology and performance are greatly affected by Ds. LXie studied CMC of Ds with different H and Na. The results of SEM analysis showed that: CMC-Li-1 (DS=1). 00) is granular structure, CMC-Li-2 (DS=0). 62) is linear structure. M. He proved that: CMC. Styrene butadiene rubber (SBR) can inhibit the agglomeration of Li: O organization can stabilize the interface structure, and facilitate the effect of electrochemical properties.
As a binder, CMC material can be used in different types of electrode materials such as natural graphite, mesophase carbon microspheres (MCMB), lithium titanate, tin-based silicon-based cathode material, lithium iron phosphate anode material, etc., which can improve the battery capacity, cycle stability and cycle life compared with PYDF. This is due to the good thermal stability, electrical conductivity and electrochemical characteristics of CMC materials. There are two main mechanisms for CMC to improve the performance of lithium ion batteries:
(1) CMC bond performance is stable to obtain a stable battery performance to create the necessary prerequisite;
(2) CMC has good electron and ion conductivity, which can promote the transfer of Li.
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