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

doi:10.1016/j.electacta.2020.136815

GIEC OpenIR

	Strategy for practically constructing high-capacity sulfur cathode by combining sulfur-hierarchical porous graphitic carbon composite with surface modification of polydopamine
	Hu, Qianqian 1,2,3; Liu, Shuling 1,3; Lu, Jiqun 1,3; Zhong, Haoxiang 1,3; Ren, Yilun 1,3; Hu, Yunjian 2; Cao, Shubin 2; Li, Tingliang 2; Zhang, Lingzhi1 ; Hong, Ye 4
	2020-10-01
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	356 页码:10
通讯作者	Zhang, Lingzhi(lzzhang@ms.giec.ac.cn) ; Hong, Ye(hongye2016@163.com)
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.
关键词	Lithium sulfur batteries Hierarchical porous graphitic carbon Polydopamine coating Improve cycling stability Pouch cell
DOI	10.1016/j.electacta.2020.136815
关键词[WOS]	HIGH-PERFORMANCE ; LI-S ; LITHIUM ; SHELL ; GRAPHENE ; ARCHITECTURES
收录类别	SCI
语种	英语
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
项目资助者	K.C. Wong Education Foundation ; National Natural Science Foundation of China ; Guangzhou Automobile Group, China
WOS类目	Electrochemistry
WOS记录号	WOS:000571450200002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/32072
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
第一作者单位	中国科学院广州能源研究所
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.