期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 16, 页码 18519-18525出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c01607
关键词
all-solid-state lithium-sulfur battery; stable interface; electronic/ionic conduction; sulfur-embedded FeS2; electrochemical performance
资金
- National Key R&D Program of China [2018YFB0905400]
- National Natural Science Foundation of China [51872303, U1964205]
- Zhejiang Provincial Natural Science Foundation of China [LD18E020004, LY18E020018]
- Ningbo S&T Innovation 2025 Major Special Programme [2018B10061, 2018B10087, 2019B10044]
- Jiangxi Provincial Key R&D Program of China [20182ABC28007]
- Youth Innovation Promotion Association CAS [2017342]
All-solid-state lithium-sulfur batteries employing sulfur electrodes and a solid electrolyte at room temperature are still a great challenge owing to the low conductivities of sulfur cathodes. In this work, we report room temperature all-solid-state lithium-sulfur batteries using thin sulfur layer-embedded FeS2 (FeS2@S) microsphere composites as active materials in the FeS2@S-Li10GeP2S12-Super P cathode electrode. Setting the cut-off voltage between 1.5 and 2.8 V, only lithiation-delithiation reactions between L2FeS2 and FeSy and direct reaction between Li2S and S will occur, which avoids large volume change of FeS2 caused by the conversion reaction, leading to the structure integrity of FeS2@S. The resultant batteries exhibit excellent rate and cyclic performances, delivering specific capacities of 1120.9, 937.2, 639.7, 517.2, 361.5, and 307.0 mA h g(-1) for the FeS2@S composite cathode, corresponding to the normalized capacities of 1645.5, 1252.9, 782.5, 700.2, 478.4, and 363.6 mA h g(-1) for sulfur at 30, 50, 100, 500, 1000, and 5000 mA g-1, respectively. Besides, they can retain the normalized capacity of 430.7 mA h g(-1) for sulfur at 1000 mA g(-1) after 200 cycles at room temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据