1. Tailored Reaction Route by Micropore Confinement for Li-S Batteries Operating under Lean Electrolyte Conditions.
- Author
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Hui Wang, Adams, Brian D., Huilin Pan, Liang Zhang, Kee Sung Han, Estevez, Luis, Dongping Lu, Haiping Jia, Jun Feng, Jinghua Guo, Zavadil, Kevin R., Yuyan Shao, and Ji-Guang Zhang
- Subjects
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MICROPORES , *LITHIUM sulfur batteries , *ELECTROLYTES , *ENERGY storage , *LITHIUM-ion batteries , *DISCONTINUOUS precipitation - Abstract
Lithium-sulfur (Li-S) batteries are one of the most promising alternative energy storage systems beyond Li-ion batteries. However, the sluggish kinetics of the nucleation and growth of the solid discharge product of Li2S/Li2S2 in the lower discharge plateau has been recently identified as a critical hurdle for attaining high specific capacity in Li-S batteries with high sulfur loadings under lean electrolyte conditions. Herein, a new strategy of breaking the charge-transport bottleneck by successful generation of experimentally verified stable Li2S2 and a reservoir of quasi-solid lithium polysulfides within the micropores of activated carbon fiber cloth as a high-sulfur-loading host is proposed. The developed Li-S cell is capable of delivering a highly sustainable areal capacity of 6.0 mAh cm-2 under lower electrolyte to sulfur ratios (<3.0 mLE gS -1). Micropore confinement leads to generation of solid Li2S2 that enables high utilization of the entire electroactive area by its inherent self-healing capacity. This strategy opens a new avenue for rational material designs for Li-S batteries under lean electrolyte condition. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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