Unlocking the potential of silicon anodes in lithium-ion batteries:A claw-inspired binder with synergistic interface bonding  

作　　者：Jun Shen Shilin Zhang Haoli Wang Renxin Wang Yingying Hu Yiyang Mao Ruilin Wang Huihui Zhang Yumeng Du Yameng Fan Yingtang Zhou Zaiping Guo Baofeng Wang 

机构地区：[1]Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai University of Electric Power,Shanghai,200090,China [2]School of Chemical Engineering,The University of Adelaide,Adelaide 5000,Australia [3]Institute for Superconducting&Electronic Materials,University of Wollongong,Wollongong,2500,Australia [4]Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control,National Engineering Research Center for Marine Aquaculture,Marine Science and Technology College,Zhejiang Ocean University,Zhoushan 316004,China

出　　处：《eScience》2024年第3期127-133,共7页电化学与能源科学（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No:22075173);the Science and Technology Commission of Shanghai Municipality(19DZ2271100 and 21010501100);the Australian Research Council(DE240100159)。

摘　　要：Binders play a crucial role in enhancing the cycling stability of silicon anodes in next-generation Li-ion batteries.However,traditional linear polymer binders have difficulty withstanding the volume expansion of silicon during cycling.Herein,inspired by the fact that animals’claws can grasp objects firmly,a claw-like taurine-grafted-poly(acrylic acid)binder(Tau-g-PAA)is designed to improve the electrochemical performance of silicon anodes.The synergistic effects of different polar groups(sulfo and carboxyl)in Tau-g-PAA facilitate the formation of multidimensional interactions with silicon nanoparticles and the diffusion of Li ions,thereby greatly improving the stability and rate performance of silicon anodes,which aligns with results from density functional theory(DFT)simulations.As expected,a Tau-g-PAA/Si electrode exhibits excellent cycling performance with a high specific capacity of 1003mAhg−1at 1C(1C=4200mAhg−1)after 300 cycles,and a high rate performance.The design strategy of using polar small molecule-grafted polymers to create claw-like structures could inspire the development of better binders for silicon-based anodes.

关 键 词：Si electrode Taurine-g-poly(acrylic acid) Claw-inspired binder High ionic conductivity 

分 类 号：TM912[电气工程—电力电子与电力传动]