Interface-Adaptive Binder Enabled by Supramolecular Interactions for High-Capacity Si/C Composite Anodes in Lithium-Ion Batteries

被引:94
作者
Hu, Linlin [1 ]
Jin, Mihan [1 ]
Zhang, Zhen [1 ]
Chen, Haixia [1 ]
Ajdari, Farshad Boorboor [2 ]
Song, Jiangxuan [1 ]
机构
[1] Xi An Jiao Tong Univ, Shaanxi Int Res Ctr Soft Matter, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Univ Kashan, Dept Appl Chem, Kashan 8731753153, Iran
基金
中国国家自然科学基金;
关键词
high areal capacity; interface-adaptive ability; lithium-ion batteries; polymer binders; Si; C anodes;
D O I
10.1002/adfm.202111560
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Although Si and graphite (Si/C) composite materials are among the most promising alternative to graphite anode in commercial batteries because of high capacity, the issue of the poor structural and interfacial stability of the composite electrode is extremely challenging. Herein, an interface-adaptive triblock polymer binder that can interact Si and graphite particles to improve the particle affinity and binder spreadability via the supramolecular interactions of pi center dot center dot center dot pi stacking and hydrogen bonding is presented. The strategy of enhancing the interfacial interactions can further effectively stabilize the electrode interface and minimize the electrode/electrolyte side reactions. Benefiting from this proposed binder, the Si/C anode retains a high reversible capacity (82.1%) after 400 cycles and delivers improved cycling stability even at high areal capacity (4 mAh cm(-2), 0.067% capacity loss/cycle) and in Si/C|LiNi0.8Co0.1Mn0.1O2 full cell (0.22% capacity loss/cycle). This design strategy for the binder provides a novel path toward high-energy, long-cycling Si/C anodes.
引用
收藏
页数:9
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