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Strategy for practically constructing high-capacity sulfur cathode by combining sulfur-hierarchical porous graphitic carbon composite with surface modification of polydopamine

文献类型：期刊论文

作者Hu, Qianqian1,2,3; Liu, Shuling1,3; Lu, Jiqun1,3; Zhong, Haoxiang1,3; Ren, Yilun1,3; Hu, Yunjian2; Cao, Shubin2; Li, Tingliang2; Zhang, Lingzhi1; Hong, Ye4
刊名ELECTROCHIMICA ACTA
出版日期2020-10-01
卷号356页码:10
ISSN号0013-4686
关键词Lithium sulfur batteries Hierarchical porous graphitic carbon Polydopamine coating Improve cycling stability Pouch cell
DOI10.1016/j.electacta.2020.136815
通讯作者Zhang, Lingzhi(lzzhang@ms.giec.ac.cn) ; Hong, Ye(hongye2016@163.com)
英文摘要Driven by intriguingly high energy density up to 2600 Wh/kg, lithium sulfur (Li-S) battery is considered as one of the most promising energy storage devices compared with conventional lithium ion battery. The main obstructions plaguing Li-S batteries associated with the electrical resistivity of sulfur/lithium sulfides, the dissolution of polysulfides in ether-based electrolyte and the large volume variation, result in poor cycling performance and rate capability. Here, we develop a polymer optimized cathode that is polydopamine layer coated on the surface of sulfur loaded hierarchical porous graphitic carbon composites (HPGC-S-PD) by a simple in-situ polymerization method toward the highly suppressed shuttle effect, thus the significantly improved cell performance. Attributed to the superiorities of the structure engineering including the strengthened polysulfide trapping, accelerated ionic conductivity and stable electrode construction, this cathode can deliver an excellent cycling performance over 700 cycles at 1 C, a high areal capacity of 7.25 mAh/cm(2) with raised sulfur loading as high as 5.15 mg/cm(2). Meanwhile, the obtained cathode can work well with a lower E/S ratio compared with the non-coated cell, which suggests the immense possibility for yielding a practically Li-S battery with high energy density based on this electrode architecture. Strikingly, the pouch cell with optimized cathode material can realize an energy density of 272 Wh/kg after 40 cycles at 0.1 C. This rational design of sulfur cathode combining HPGC with polymer coating by a scalable strategy provides a comprehensive understanding of the structural engineering for sulfur cathodes in pursuit of practically high performance Li-S batteries. (C) 2020 Elsevier Ltd. All rights reserved.
WOS关键词HIGH-PERFORMANCE ; LI-S ; LITHIUM ; SHELL ; GRAPHENE ; ARCHITECTURES
资助项目K.C. Wong Education Foundation ; National Natural Science Foundation of China[21573239] ; Guangzhou Automobile Group, China
WOS研究方向Electrochemistry
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000571450200002
资助机构K.C. Wong Education Foundation ; National Natural Science Foundation of China ; Guangzhou Automobile Group, China
源URL[http://ir.giec.ac.cn/handle/344007/32071]  
专题中国科学院广州能源研究所
通讯作者Zhang, Lingzhi; Hong, Ye
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China
2.GAC Automot Res & Dev Ctr, Guangzhou 511434, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Guangdong Polytech Normal Univ, Ind Training Ctr, Guangzhou 510665, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Qianqian,Liu, Shuling,Lu, Jiqun,et al. Strategy for practically constructing high-capacity sulfur cathode by combining sulfur-hierarchical porous graphitic carbon composite with surface modification of polydopamine[J]. ELECTROCHIMICA ACTA,2020,356:10.
APA Hu, Qianqian.,Liu, Shuling.,Lu, Jiqun.,Zhong, Haoxiang.,Ren, Yilun.,...&Hong, Ye.(2020).Strategy for practically constructing high-capacity sulfur cathode by combining sulfur-hierarchical porous graphitic carbon composite with surface modification of polydopamine.ELECTROCHIMICA ACTA,356,10.
MLA Hu, Qianqian,et al."Strategy for practically constructing high-capacity sulfur cathode by combining sulfur-hierarchical porous graphitic carbon composite with surface modification of polydopamine".ELECTROCHIMICA ACTA 356(2020):10.

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来源：广州能源研究所

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