期刊
JOURNAL OF POWER SOURCES
卷 329, 期 -, 页码 268-272出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.08.058
关键词
All-solid-state battery; Lithium-sulfur battery; Activation of sulfur; High energy density; High power density
All-solid-state lithium-sulfur batteries are expected to be valuable next generation batteries. To improve the performance of all-solid-state lithium-sulfur batteries, it is essential to raise both the reactivity of sulfur and the ionic conductivity of the positive composite electrode. For achieving this, we investigate a positive composite electrode prepared using P2S5 and a solid electrolyte with a high ionic conductivity. As a result, we have found that the lithium-sulfur cell exhibits a relatively low activation energy together with high ionic conductivity. The positive composite electrode exhibits an extremely high capacity of 1550 mA h g(-1) (sulfur) at 13 mA cm(-2) and 25 degrees C. Moreover, when using the positive electrode, the energy densities at the cell level (18650) are 540 W h kg(-1) and 990 W h L-1, estimated from the equivalent structure of a current lithium-ion battery. (C) 2016 Elsevier B.V. All rights reserved.
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