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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.
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页数:11
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