文献类型：期刊文献

英文题名：In-situ self-assembly robust defected graphene wrapped silicon/nanorod carbon for high-performance binder-free Li ion battery

作者：Li, Xinrui[1];Su, Haiping[1];Ma, Cheng[2];Cong, Yuchen[1];Wang, Jian[3];Lin, Hongzhen[3];Shang, Yazhuo[1];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Peoples R China

年份：2022

卷号：324

外文期刊名：MATERIALS LETTERS

收录：;EI(收录号：20222612276627);WOS:【SCI-EXPANDED(收录号:WOS:000877458600004)】；

基金：This work was financially supported by the National Science Foun- dation of China (No. 21908053) , Shanghai Sailing Program (19YF1411700) , the Natural Science Foundation of Jiangsu Province (NO. BK20210130).

语种：英文

外文关键词：Self-assembly; Si/C hybrid anode; 3D conductive network; Binder-free anode

摘要：High capacity silicon electrode with low cost is deemed as the promising anode material for the future Li-ion batteries with the replacement of graphite anode. In this work, robust defected graphene layers wrapped silicon/nanorod carbon (Si/NRC@DG) is synthesized through evaporation-induced self-assembly method for high lithium ion storage. Results show that the rapid conductive network formed by nanorods and defected graphene shorten the electron/lithium ion pathway to reach Si nanoparticles, enhancing the utilization. Meanwhile, the unique three-dimensional nano-architecture accommodates the large volumetric expansion of Si, immerses the electrolyte and facilitates efficient lithium ion diffusion. As a result, the so-synthesized Si/NRC@DG electrode exhibits a remarkable capacity of 669 mA h g(-1) at 0.1 A g(-1) after 100 cycles. Coupled with LiFePO4 cathode, the assembled full cell is capable of offering an initial capacity of 126 mA h g(-1), providing opportunities for realizing high energy lithium ion batteries.