A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries

doi:10.1039/d0ta08845e

	A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries
	Lu, Jian 4; Wang, Changlai 1,4; Xia, Guoliang 4; Tong, Huigang 4; Yang, Yang 4; Zhu, Dequan 3; Chen, Qianwang 2,4
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2020-12-07
卷号	8
ISSN号	2050-7488
DOI	10.1039/d0ta08845e
通讯作者	Chen, Qianwang(cqw@ustc.edu.cn)
英文摘要	Metal oxides usually exhibit low reversible capacity, inferior rate capability and limited lifespan for potassium-ion batteries due to the large radius of K+. Herein, a spring-like lamellar nanostructure composed of VO nanoparticles embedded in amorphous carbon layers (VO/C) has been rationally designed. It exhibits a large capacity of 345 mA h g(-1) at 0.1 A g(-1) after 400 cycles, excellent stability of 241 mA h g(-1) at 1 A g(-1) over 1000 cycles and outstanding rate performance of 104 mA h g(-1) at 15 A g(-1), superior to most reported transition metal oxides for PIBs. The in situ formed lamellar VO/C nanostructure can accommodate the volume variation during cycling. Density functional theory (DFT) calculations reveal that the hybrid VO/C structure significantly increases the electronic states at the Fermi level, thus improving the electronic conductivity, and reduces the K+ diffusion barrier (from 1.95 eV of VO to 1.19 eV), which contributes to its large capacity and superior rate performance. A PIB full cell exhibits 168 mA h g(-1) at 2 A g(-1) and 80% capacity retention over 500 cycles. This work provides some insights into the rational design of metal oxide-based anodes for high-performance PIBs.
资助项目	National Natural Science Foundation of China (NSFC)[51772283] ; National Key R&D 229 Program of China[2016YFA0401801] ; Hong Kong Scholars Program[XJ2019022]
WOS关键词	ANODE ; INTERCALATION ; STORAGE ; PSEUDOCAPACITANCE ; COMPOSITE ; SPHERES
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000593047100020
资助机构	National Natural Science Foundation of China (NSFC) ; National Key R&D 229 Program of China ; Hong Kong Scholars Program
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/105460]
专题	中国科学院合肥物质科学研究院
通讯作者	Chen, Qianwang
作者单位	1.City Univ Hong Kong, Dept Mat Sci & Engn, Ctr Super Diamond & Adv Films COSDAF, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China 3.Anqing Normal Univ, Sch Elect Engn & Intelligent Mfg, Anqing 246052, Anhui, Peoples R China 4.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Lu, Jian,Wang, Changlai,Xia, Guoliang,et al. A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8.
APA	Lu, Jian.,Wang, Changlai.,Xia, Guoliang.,Tong, Huigang.,Yang, Yang.,...&Chen, Qianwang.(2020).A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries.JOURNAL OF MATERIALS CHEMISTRY A,8.
MLA	Lu, Jian,et al."A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries".JOURNAL OF MATERIALS CHEMISTRY A 8(2020).