高性能硅基负极聚合物粘结剂的研究进展.

Silicon （Si） has become the most promising anode material for the next generation lithium-ion battery because of its ultra-high theoretical specific capacity. However， the intercalation and removal of lithium-ions will cause a great change in the volume of silicon microparticles (SiMP)， which will lead to the pulverization of SiMP and irreversible attenuation of electrode capacity， which seriously limits the wide application of silicon based materials. A large number of reports in the past have shown that polymer binder can effectively overcome the “island effect” caused by the volume expansion of SiMP . It could maintain the integrity of the electrode in the charge-discharge process， and then improve the electrochemical performance of the electrode. According to the structure classification of polymer binders， they can be roughly divided into four categories， linear， branched， cross-linked and conjugated. When the binders with different molecular structures are used as silicon-based negative electrode， the electrodes show different electrochemical properties. Particularly， when polymer binders with multiple molecular structures are designed， the practical application of silicon-based negative electrodes will be greatly promoted. By analyzing the effects of various polymer binders on the electrochemical properties of silicon anode， the differences of binders with different molecular structures can be clearly obtained， and then provide ideas for the development of silicon anode polymer binder in the future. Finally， this paper proposes the design direction of the next-generation polymer binder to promote its development towards large-scale application and industrial production. [ABSTRACT FROM AUTHOR]