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

被引：316

作者：

Huang, Cheng ^{[1
]}

Xiao, Jie ^{[1
]}

Shao, Yuyan ^{[1
]}

Zheng, Jianming ^{[1
]}

Bennett, Wendy D. ^{[1
]}

Lu, Dongping ^{[1
]}

Saraf, Laxmikant V ^{[1
]}

Engelhard, Mark ^{[1
]}

Ji, Liwen ^{[1
]}

Zhang, Jiguang ^{[1
]}

Li, Xiaolin ^{[1
]}

Graff, Gordon L. ^{[1
]}

Liu, Jun ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

关键词：

LI-S BATTERIES; CARBON ELECTRODES; CATHODE; PERFORMANCE; ION; BINDER; COMPOSITES;

D O I：

10.1038/ncomms4015

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：

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 to actively control the electrochemical reactions and minimize the deleterious side reactions, leading to significant performance improvements. Lithium-sulphur cells incorporating this hybrid anodes deliver capacities of >800 mAhg(-1) for 400 cycles at a high rate of 1,737mAg(-1), with only 11% capacity fade and a Coulombic efficiency >99%. This simple hybrid concept may also provide scientific strategies for protecting metal anodes in other energy-storage devices.

引用

页数：7

共 55 条

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