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N-Doped Defective Carbon Layer Encapsulated W2C as a Multifunctional Cathode Catalyst for High Performance Li-O2Battery
Gao, Rui1; Zhou, Yao2; Liu, Xiangfeng1; Wang, Jiacheng2
2017
发表期刊Electrochimica Acta
ISSN00134686
卷号245页码:430-437
摘要The sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) restricts the practical application of Li-O2batteries. The design and facile synthesis of cathode catalysts with high activity on both ORR and OER are desired. In this study, an ultrathin N-doped defective carbon layer-encapsulated W2C hybrid (W2C@NC) which has been successfully synthesized through a facile in-situ pyrolysis and reduction of WO3@g-C3N4shows a high activity on ORR, OER and even the decomposition of the undesired Li2CO3as a multifunctional cathode catalyst for Li-O2batteries. The cells catalyzed by W2C@NC show a much higher initial capacity of 10976 mAh g−1, lower overpotential and longer cycle life, which can be largely attributed to the synergistic effect of W2C nanoparticles and the ultrathin defective N-doped carbon layers. The unique architecture not only accelerates the electron and Li+conduction but also provides more active sites, which lead to the large enhancement of the electrocatalytic performance. In addition to the high activity on both ORR and OER, W2C@NC also shows a high catalytic function on the decomposition of the undesired side product of Li2CO3. This study offers some new insights into the design and synthesis of novel high performance cathode catalyst for Li-O2battery. © 2017 Elsevier Ltd
DOI10.1016/j.electacta.2017.05.177
EI入藏号20172303731632
EI主题词Lithium-air batteries
EI分类号802.2 Chemical Reactions - 804 Chemical Products Generally
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25881
专题中国科学院上海硅酸盐研究所
作者单位1.College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing; 100049, China;
2.State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China
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Gao, Rui,Zhou, Yao,Liu, Xiangfeng,et al. N-Doped Defective Carbon Layer Encapsulated W2C as a Multifunctional Cathode Catalyst for High Performance Li-O2Battery[J]. Electrochimica Acta,2017,245:430-437.
APA Gao, Rui,Zhou, Yao,Liu, Xiangfeng,&Wang, Jiacheng.(2017).N-Doped Defective Carbon Layer Encapsulated W2C as a Multifunctional Cathode Catalyst for High Performance Li-O2Battery.Electrochimica Acta,245,430-437.
MLA Gao, Rui,et al."N-Doped Defective Carbon Layer Encapsulated W2C as a Multifunctional Cathode Catalyst for High Performance Li-O2Battery".Electrochimica Acta 245(2017):430-437.
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