Nano-Scale Interface Engineering of Sulfur Cathode to Enable High-Performance All-Solid-State Li-S Batteries

被引:11
|
作者
Zhong, Haoyue [1 ]
Su, Yu [1 ]
Ma, Ruqin [1 ]
Luo, Yu [1 ]
Lin, Hongxin [1 ]
Gu, Jiabao [1 ]
Gong, Zhengliang [2 ]
Yang, Yong [1 ]
机构
[1] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Coll Energy, Xiamen 361102, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
ALD; interface engineering; all-solid-state Li-S battery; electrolyte decomposition; ATOMIC LAYER DEPOSITION; LITHIUM; COATINGS; MICROSTRUCTURE; STABILITY; CHEMISTRY; CARBON; AL2O3;
D O I
10.1002/adfm.202315925
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
All-solid-state lithium-sulfur batteries (ASSLSBs) are expected to be the next generation of high-energy battery systems due to their long lifespan and high safety. However, unstable interfaces between elemental sulfur, conductive carbon, and solid electrolytes lead to slow charge transport and mechanical failures, thereby limiting battery performance. Herein, atomic layer deposition-derived lithium phosphorus oxide is applied to the surface of carbon/sulfur particles to enhance the interfacial stability of the sulfur cathode and improve the electrochemical performance of ASSLSBs. The coating layer can inhibit electrolyte decomposition and improve interfacial stability by blocking electron conduction between carbon and electrolyte. Moreover, it not only serves as an ion-conducting layer to facilitate Li+ transport but also acts as a stress buffer layer to alleviate contact failure. The assembled ASSLSBs with sulfide electrolyte exhibit an initial specific capacity of 1322 mAh g(-1) at 0.2 C and capacity retention of 86.4% after 300 cycles. Furthermore, ASSLSBs maintain a reversible capacity of 645 mAh g(-1) at 0.5 A g(-1) after 1000 cycles, confirming the long cycling stability of the coated sulfur cathode. Even under high sulfur loading, ASSLSBs achieve high areal capacities of 4.6 mAh cm(-2) at 30 degrees C and 11.7 mAh cm(-2) at 60 degrees C.
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页数:11
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