期刊
NANO ENERGY
卷 76, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105083
关键词
Sulfurized polyacrylonitrile; Solid electrolyte coating; Tellurium; Solid-state battery; Lithium-sulfur battery
类别
资金
- National Natural Science Foundation of China [21975087, U1966214, 51902116]
- China Postdoctoral Science Foundation [2019M652634]
Considering its high theoretical energy density and high safety, the all-solid-state lithium-sulfur battery (ASSLSB) has become a promising candidate for the next-generation energy storage system. However, the low reactivity of sulfur and high interfacial resistances between the cathodes and solid electrolytes seriously hinder the practical application of high performance ASSLSBs. Sulfurized polyacrylonitrile (S@pPAN), which can effectively alleviate the volume expansion of sulfur, is a suitable choice for the sulfur cathode, but shows limited performance in ASSLSB. Here, we demonstrate a tellurium-doped S@pPAN (Te0.05S0.95@pPAN) cathode coated with solid electrolyte (Li7P3S11) for an ASSLSB with high reactivity and significant cycling stability. Benefiting from the thin layer coating of Li7P3S11 and the effect of Te-doping, the Te0.05S0.95@pPAN@Li7P3S11 composite delivers significantly enhanced reaction kinetics and excellent interfacial compatibility with the solid electrolyte. At mom temperature, the assembled ASSLSB exhibits excellent rate and long cycling performance, with a reversible capacity over 1173.1 mAh g(-1) and stable cycling over 500 cycles. The strategy of Te-doping and surface coating not only is facile and promising, but also provides guidance for constructing applicable ASSLSBs.
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