Evidence of covalent synergy in silicon-sulfur-graphene yielding highly efficient and long-life lithium-ion batteries

被引:181
作者
Hassan, Fathy M. [2 ]
Batmaz, Rasim [2 ]
Li, Jingde [2 ]
Wang, Xiaolei [2 ]
Xiao, Xingcheng [1 ,3 ]
Yu, Aiping [2 ]
Chen, Zhongwei [2 ]
机构
[1] Gen Motors Global Res & Dev Ctr, Chem & Mat Syst, Warren, MI 48090 USA
[2] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada
[3] Gen Motors Global Res & Dev Ctr, Chem & Mat Syst, Warren, MI 48090 USA
基金
加拿大自然科学与工程研究理事会;
关键词
SOLID-ELECTROLYTE INTERPHASE; OXYGEN REDUCTION; DOPED CARBON; ALLOY ANODES; PERFORMANCE; CHEMISTRY; NITROGEN; SPECTRA; XPS;
D O I
10.1038/ncomms9597
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Silicon has the potential to revolutionize the energy storage capacities of lithium-ion batteries to meet the ever increasing power demands of next generation technologies. To avoid the operational stability problems of silicon-based anodes, we propose synergistic physicochemical alteration of electrode structures during their design. This capitalizes on covalent interaction of Si nanoparticles with sulfur-doped graphene and with cyclized polyacrylonitrile to provide a robust nanoarchitecture. This hierarchical structure stabilized the solid electrolyte interphase leading to superior reversible capacity of over 1,000 mAhg(-1) for 2,275 cycles at 2 Ag-1. Furthermore, the nanoarchitectured design lowered the contact of the electrolyte to the electrode leading to not only high coulombic efficiency of 99.9% but also maintaining high stability even with high electrode loading associated with 3.4 mAh cm(-2). The excellent performance combined with the simplistic, scalable and non-hazardous approach render the process as a very promising candidate for Li-ion battery technology.
引用
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页数:11
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