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A self-stabilized suspension catholyte to enable long-term stable Li-S flow batteries
Xu, Song1,2; Zhang, Lan1; Zhang, Xiangping1; Cai, Yingjun1; Zhang, Suojiang1
2017-07-07
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
卷号5期号:25页码:12904-12913
摘要

Lithium-sulfur suspension flow batteries are a promising technology for large-scale energy storage, but long-term stability of the suspension catholyte is urgently needed for future application of this system. Here a special self-stabilized suspension catholyte is designed and prepared based on a pie-structured sulfur-Ketjenblack@reduced graphene oxide (S-KB@rGO) composite. In the S-KB@rGO suspension, the sulfur nanoparticles are loaded onto the conductive KB by an in situ redox reaction; the special hyperbranched structure of KB enhances the stability of the suspension; rGO sheets which wrap the S-KB particles not only act as a multilayered physical barrier for sulfur immobilization, but also facilitate electron transportation in the whole suspension. Therefore, a suspension catholyte with long-term physical and electrochemical stability is achieved by the synergetic effect of the KB and rGO. Li-S flow cells with this catholyte show excellent cycle stability (more than 1000 cycles with 99% coulombic efficiency) and low self-discharge (1.1% loss per day). Continuous charge/discharge tests in different flow modes are performed and the influence of the flow rate on the flow battery performance is discussed. The smooth operation in long-lasting flow mode further demonstrates the stability of the suspension catholyte.

文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c7ta02110k
收录类别SCI
语种英语
关键词[WOS]LITHIUM-SULFUR BATTERIES ; ELECTROCHEMICAL ENERGY-STORAGE ; RESEARCH-AND-DEVELOPMENT ; CYCLE LIFE ; CATHODE MATERIALS ; NICKEL FOAM ; PERFORMANCE ; ELECTRODE ; DENSITY ; EFFICIENCY
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
WOS类目Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
项目资助者National Key Projects for Fundamental Research and Development of China(2016YFB0100100) ; International Cooperation and Exchange of the National Natural Science Foundation of China(51561145020) ; Key Program of National Natural Science Foundation of China(91434203) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDA09010103) ; CAS/SAFEA International Partnership Program for Creative Research Teams(20140491518)
WOS记录号WOS:000404571500031
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22725
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn, State Key Lab Multiphase Complex Syst,Inst Proc E, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
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GB/T 7714
Xu, Song,Zhang, Lan,Zhang, Xiangping,et al. A self-stabilized suspension catholyte to enable long-term stable Li-S flow batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(25):12904-12913.
APA Xu, Song,Zhang, Lan,Zhang, Xiangping,Cai, Yingjun,&Zhang, Suojiang.(2017).A self-stabilized suspension catholyte to enable long-term stable Li-S flow batteries.JOURNAL OF MATERIALS CHEMISTRY A,5(25),12904-12913.
MLA Xu, Song,et al."A self-stabilized suspension catholyte to enable long-term stable Li-S flow batteries".JOURNAL OF MATERIALS CHEMISTRY A 5.25(2017):12904-12913.
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