期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 50, 页码 43669-43681出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b16428
关键词
CuS@S hybrid; molecular-level dispersion; mineral chemistry; energy storage; electrochemistry
资金
- National Key Research and Development Program of China [2017YFB0102000]
- National Natural Science Foundation of China [51622406, 21673298, 21473258]
- National Postdoctoral Program for Innovative Talents [BX00192]
- China Postdoctoral Science Foundation [2017M6203552]
- Young Elite Scientists Sponsorship Program by CAST [2017QNRC001]
- Innovation Mover Program of Central South University [2017CX004, 2018CX005]
- Hunan Provincial Science and Technology Plan [2017TP1001]
- Provincial Natural Science Foundation of Hunan [2016TP1009]
- Hunan Provincial Natural Science Foundation of China [2018JJ3633]
- Fundamental Research Funds for the Central Universities of Central South University [2018zzts013, 2018zzts369]
- National Mittal Student Innovation Program [201810533258]
- Postgraduate Electronic Design Competition of China [502241802]
The transition-metal sulfide, CuS, is deemed a promising material for energy storage, mainly derived from its good chemisorption and conductivity, although serious capacity fading limits its advancement within reversible lithium storage. Learning from the gold extraction method utilizing the lime-sulfur synthetic-solution, a CuS@S hybrid utilizing CaSx as both sulfur resource and reductant-oxidant is prepared, which is an efficient approach to apply the metallurgy for the preparation of electrode materials. Regulating the amount of CuCl2, the CuS@S is induced to reach a molecular-level hybrid. When utilized as an anode within a lithium-ion battery, it presents the specific capacity of 514.4 mA h g(-1) at 0.1 A g(-1) over 200 cycles. Supported by the analyses of pseudo capacitive behaviors, it is confirmed that the CuS matrix with the suitable content of auxiliary sulfur could improve the durability of the CuS-based anode. Expanding the wider application within lithium-sulfur batteries, the synchronous growth of CuS@S exhibits stronger chemisorption with polysulfides than the mechanical mixture of CuS and S. A suite of in situ electrochemical impedance spectroscopy studies further investigates the stable resistances of the CuS@S within the charge/discharge process, corresponding to the reversible structure evolution. This systematic work may provide a practical fabricating route of metal sulfides for scalable energy storage applications.
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