A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O-2 batteries

doi:10.1039/c8ra05905e

	A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O-2 batteries
	Liu, Shuo 1,2; Wang, Chengdong 1; Dong, Shanmu 1; Hou, Hongbin 1; Wang, Ben 2; Wang, Xiaogang 1; Chen, Xiao 1; Cui, Guanglei 1
刊名	RSC ADVANCES
	2018
卷号	8 期号:49 页码:27973-27978
ISSN号	2046-2069
DOI	10.1039/c8ra05905e
英文摘要	Lithium-oxygen (Li-O-2) batteries as promising energy storage devices possess high gravimetric energy density and low emission. However, poor reversibility of electrochemical reactions at the cathode significantly affects the electrochemical properties of nonaqueous Li-O-2 batteries, and low charge-discharge efficiency also results in short cycle-life. In this work, functional air cathodes containing mesoporous tungsten carbide nanoparticles for improving the reversibility of positive reactions in Li-O-2 cells are designed. Mesoporous tungsten carbides are synthesized with mesoporous carbon nitride as the reactive template and carbon source. And mesoporous tungsten carbides in cathode materials display better electrochemical performance in Li-O-2 cells in comparison with mesoporous carbon nitride and hard carbon. Tungsten carbide-1 (WC-1) with larger specific surface area promotes reversible formation and decomposition of Li2O2 at the cathode and lower charge overpotential (about 0.93 V) at 100 mA g(-1), which allows the Li-O-2 cell to run up to 100 cycles. In addition, synergistic interaction between WC-1 and LiI could further decrease the charging overpotentials of Li-O-2 cells and improve the charge-discharge performances of the Li-O-2 cells. These results indicate that mesoporous electrocatalysts can be utilized as promising functional materials for Li-O-2 cells to decrease overpotentials.
资助项目	National Science Fund for Distinguished Young Scholars[51625204] ; Key Scientific and Technological Innovation Project of Shandong[2017CXZC0505] ; Shandong Provincial Natural Science Foundation[ZR2014BQ004] ; National Natural Science Foundation of China[21473228] ; Qingdao Key Lab of Solar Energy Utilization and Energy Storage technology
WOS关键词	LITHIUM-OXYGEN BATTERIES ; MOLYBDENUM-DISULFIDE ; REDUCTION REACTION ; CARBON ; LI2O2 ; NITRIDE ; G-C3N4 ; CHARGE ; NANOPARTICLES ; COCATALYSTS
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000442078800039
资助机构	National Science Fund for Distinguished Young Scholars ; Key Scientific and Technological Innovation Project of Shandong ; Shandong Provincial Natural Science Foundation ; National Natural Science Foundation of China ; Qingdao Key Lab of Solar Energy Utilization and Energy Storage technology
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/12136]
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Chen, Xiao; Cui, Guanglei
作者单位	1.Chinese Acad Sci, Qingdao Ind Energy Storage Res Inst, Qingdao Inst Bioenergy & Bioproc Technol, 189 Songling Rd, Qingdao 266101, Peoples R China 2.Qingdao Univ Sci & Technol, Coll Environm & Safety Engn, Qingdao 266042, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shuo,Wang, Chengdong,Dong, Shanmu,et al. A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O-2 batteries[J]. RSC ADVANCES,2018,8(49):27973-27978.
APA	Liu, Shuo.,Wang, Chengdong.,Dong, Shanmu.,Hou, Hongbin.,Wang, Ben.,...&Cui, Guanglei.(2018).A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O-2 batteries.RSC ADVANCES,8(49),27973-27978.
MLA	Liu, Shuo,et al."A mesoporous tungsten carbide nanostructure as a promising cathode catalyst decreases overpotential in Li-O-2 batteries".RSC ADVANCES 8.49(2018):27973-27978.