期刊
MATERIALS LETTERS
卷 229, 期 -, 页码 198-201出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.07.007
关键词
Lithium sulfur batteries; Potassium phosphotungstate spheres; Nanocomposites; Energy storage and conversion
资金
- NSFC [21603093]
- Natural Science Foundation of Jiangxi [20161BBE50095]
Herein, a new strategy of using polyoxometalates (K3PW12O40) to stabilize sulfur was introduced for the first time for Li-S batteries. The as prepared K3PW12O40 spheres/S electrode shows a initial discharge capacity of 1281.0 mAh g(-1 )with a good cycling stability at a rate of 0.1 C. In particular, the K3PW12O40/S electrode exhibits an initial specific capacity of 810.0 mAh g(-1) at a high current rate of 2 C, and remains 560.4 mAh g(-1) after 250 cycles. The excellent performances are attributed to the significant roles that K3PW12O40 host played during the charge/discharge process. (C) 2018 Elsevier B.V. All rights reserved.
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