Manipulating surface reactions in lithium–sulphur batteries using hybrid anode structures

Cheng Huang, Jie Xiao, Yuyan Shao, Jianming Zheng, Wendy D. Bennett, Dongping Lu, Laxmikant V. Saraf, Mark Engelhard, Liwen Ji, Jiguang Zhang, Xiaolin Li, Gordon L. Graff (+1 others)
2014 Nature Communications  
Lithium-sulphur batteries have high theoretical energy density and potentially low cost, but significant challenges such as severe capacity degradation prevent its widespread adoption. Here we report a new design of lithium-sulphur battery using electrically connected graphite and lithium metal as a hybrid anode to control undesirable surface reactions on lithium. Lithiated graphite placed in front of the lithium metal functions as an artificial, self-regulated solid electrolyte interface layer
more » ... yte interface layer to actively control the electrochemical reactions and minimize the deleterious side reactions, leading to significant performance improvements. Lithiumsulphur cells incorporating this hybrid anodes deliver capacities of 4800 mAh g À 1 for 400 cycles at a high rate of 1,737 mA g À 1 , with only 11% capacity fade and a Coulombic efficiency 499%. This simple hybrid concept may also provide scientific strategies for protecting metal anodes in other energy-storage devices.
doi:10.1038/ncomms4015 pmid:24402522 fatcat:zeh2yhr7cvg77bt5rdvdfhfcxe