Synergistic effect of cobalt, nitrogen-codoped hollow carbon sphere hosts for high performance lithium sulfur batteries

doi:10.1039/d0nj00787k

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Synergistic effect of cobalt, nitrogen-codoped hollow carbon sphere hosts for high performance lithium sulfur batteries
	Li, Qihua ; Yang, Jian ; Zhao, Yue ; Zhang, Zengcheng ; Wang, Chao ; He, Hao ; Wu, Jinghua ; Yao, Xiayin
刊名	NEW JOURNAL OF CHEMISTRY
	2020
卷号	44 期号:15 页码:5965-5971
关键词	MESOPOROUS CARBON POLYSULFIDE REDOX EFFICIENT NANOSPHERES CATHODE CATALYST POROSITY
DOI	10.1039/d0nj00787k
英文摘要	Lithium-sulfur (Li-S) batteries are considered to be one of the most promising candidates for the next generation of rechargeable batteries due to their high theoretical energy density and low cost. However, the practical application of Li-S batteries is seriously hindered by the dissolution of polysulfide and the intrinsic insulation of sulfur. Herein, we demonstrate a novel strategy to address these two problems by designing and synthesizing a cobalt, nitrogen-codoped hollow carbon sphere (Co, N@CPDA-HCS) with a highly conductive carbon shell to accommodate the sulfur. In this unique material architecture, each component synergistically serves a specific purpose: the highly conductive shell carbon can provide fast electron conduction paths and structural stability; the superfine Co nanoparticles uniformly embedded in the carbon shell can accelerate the conversion kinetics of the polysulfides by strong chemical interaction; moreover, the hollow structure provides a buffer space for the volume change of sulfur during charging and discharging, thus leading to a good cycle stability of sulfur cathodes. Co, N@CPDA-HCS exhibits balanced high electrochemical performance with respect to specific capacity, rate capability, and cycling stability. Specifically, S/Co, N@CPDA-HCS presents a high initial gravimetric capacity of 1365 mA h g(-1) at 0.1 A g(-1). The discharge capacity of 588 mA h g(-1) still remained at the current density of 1 A g(-1) after 300 cycles.
学科主题	Chemistry
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19776]
专题	2020专题
作者单位	1.Wu, JH (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China. 2.He, H (corresponding author), Zhengzhou Univ, Sch Phys & Microelect, Key Lab Mat Phys, Minist Educ, Zhengzhou 450001, Henan, Peoples R China. 3.Wu, JH (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Li, Qihua,Yang, Jian,Zhao, Yue,et al. Synergistic effect of cobalt, nitrogen-codoped hollow carbon sphere hosts for high performance lithium sulfur batteries[J]. NEW JOURNAL OF CHEMISTRY,2020,44(15):5965-5971.
APA	Li, Qihua.,Yang, Jian.,Zhao, Yue.,Zhang, Zengcheng.,Wang, Chao.,...&Yao, Xiayin.(2020).Synergistic effect of cobalt, nitrogen-codoped hollow carbon sphere hosts for high performance lithium sulfur batteries.NEW JOURNAL OF CHEMISTRY,44(15),5965-5971.
MLA	Li, Qihua,et al."Synergistic effect of cobalt, nitrogen-codoped hollow carbon sphere hosts for high performance lithium sulfur batteries".NEW JOURNAL OF CHEMISTRY 44.15(2020):5965-5971.