alpha-MnO2 nanofibers/carbon nanotubes hierarchically assembled microspheres: Approaching practical applications of high-performance aqueous Zn-ion batteries

doi:10.1016/j.jpowsour.2019.227244

	alpha-MnO2 nanofibers/carbon nanotubes hierarchically assembled microspheres: Approaching practical applications of high-performance aqueous Zn-ion batteries
	Liu, Yunzhao; Chi, Xiaowei; Han, Qi; Du, Yuexiu; Huang, Jiaqi; Liu, Yu; Yang, Jianhua
刊名	JOURNAL OF POWER SOURCES
	2019-12-15
卷号	443
关键词	Zn-ion batteries MnO2 cathode Spray-granulation Tap density Energy density
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.227244
文献子类	Article
英文摘要	Rechargeable Zn-ion batteries (ZIBs) have attracted extensive attention, but their practical application is hindered by the limited cycling life and complicated preparation process of cathode materials. Here, we develop a facile yet scalable chemical precipitation/spray-granulation combined methodology for the fabrication of alpha-MnO2 nanofibers/carbon nanotubes hierarchically assembled microspheres (alpha-MnO2/CNT HMs) as the cathode material for aqueous ZIBs. The alpha-MnO2 evenly anchoring to the CNTs-based framework shows significantly increased tap density compared with pristine alpha-MnO2, which can effectively enhance the electrochemical stability. Owing to the synergistic merits of highly conductive carbon nanotubes network and alpha-MnO2 nanofibers with desirable structure features, within our knowledge, the highest areal energy density of 0.98 Wh cm(-2) at 0.2 A g(-1) and the record cycling stability with 96% capacity retention over 10000 cycles at 3 A g(-1) among the reported cathodes for ZIBs are achieved. Zn2+ and H+ co-insertion reaction mechanism with high reversibility is further revealed. Fast kinetic of the H+ insertion/extraction process renders the cell excellent cycling stability. Facile preparation of nanofibrous alpha-MnO2 based micro-composite, cost benefit of the source materials, and the superior battery performance provide new approaches for the practical applications of ZIBs.
WOS关键词	STORAGE ; ZNMN2O4 ; ARRAYS
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27447]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Liu, Yunzhao,Chi, Xiaowei,Han, Qi,et al. alpha-MnO2 nanofibers/carbon nanotubes hierarchically assembled microspheres: Approaching practical applications of high-performance aqueous Zn-ion batteries[J]. JOURNAL OF POWER SOURCES,2019,443.
APA	Liu, Yunzhao.,Chi, Xiaowei.,Han, Qi.,Du, Yuexiu.,Huang, Jiaqi.,...&Yang, Jianhua.(2019).alpha-MnO2 nanofibers/carbon nanotubes hierarchically assembled microspheres: Approaching practical applications of high-performance aqueous Zn-ion batteries.JOURNAL OF POWER SOURCES,443.
MLA	Liu, Yunzhao,et al."alpha-MnO2 nanofibers/carbon nanotubes hierarchically assembled microspheres: Approaching practical applications of high-performance aqueous Zn-ion batteries".JOURNAL OF POWER SOURCES 443(2019).