Self-Supported and Flexible Sulfur Cathode Enabled via Synergistic Confinement for High-Energy-Density Lithium-Sulfur Batteries.
作者:Wang, Zhuosen; Shen, Jiadong; Liu, Jun; Xu, Xijun; Liu, Zhengbo; Hu, Renzong; Yang, Lichun; Feng, Yuezhan; Liu, Jun; Shi, Zhicong...更多内容
Advanced materials (Deerfield Beach, Fla.)
页:e1902228
DOI:10.1002/adma.201902228
出版年: 2019-Jun-20 (Epub 2019 Jun 20)
文献类型:Journal Article
摘要
Lithium-sulfur (Li-S) batteries have attracted much attention in the field of electrochemical energy storage due to their high energy density and low cost. However, the shuttle effect of the sulfur cathode, resulting in poor cyclic performance, is a big barrier for the development of Li-S batteries. Herein, a novel sulfur cathode integrating sulfur, flexible carbon cloth, and metal-organic framework (MOF)-derived N-doped carbon nanoarrays with embedded CoP (CC@CoP/C) is designed. These unique flexible nanoarrays with embedded polar CoP nanoparticles not only offer enough voids for volume expansion to maintain the structural stability during the electrochemical process, but also promote the physical encapsulation and chemical entrapment of all sulfur species. Such designed CC@CoP/C cathodes with synergistic confinement (physical adsorption and chemical interactions) for soluble intermediate lithium polysulfides possess high sulfur loadings (as high as 4.17 mg cm-2 ) and exhibit large specific capacities at different C-rates. Specially, an outstanding long-term cycling performance can be reached. For example, an ultralow decay of 0.016% per cycle during the whole 600 cycles at a high current density of 2C is displayed. The current work provides a promising design strategy for high-energy-density Li-S batteries.
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
关键词
关键词列表:Li-S batteries; flexible electrodes; high sulfur loading; self-supported arrays; synergistic confinement
作者信息
地址:Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.
Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Smart Energy Research Centre, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510000, P. R. China.
Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou, 450002, P. R. China.
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Materials Science and Engineering, Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Dalian National Laboratory for Clean Energy (DNL), Chinese Academy of Sciences (CAS), Dalian, 116023, P. R. China.
基金资助致谢
基金资助信息:
ID机构
2018YFB0905400National Key R&D Research Program of China
51771076National Natural Science Foundation of China
51622210National Natural Science Foundation of China
51872277National Natural Science Foundation of China
21673051National Natural Science Foundation of China
NSFC51621001National Natural Science Foundation of China
DNL180310DNL cooperation Fund, CAS
2017GC010218Chinese Government, the Guangdong Pearl River Talents Plan
201804010104Guangzhou Science and Technology Plan Projects
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