Insight into the role of interfacial reconstruction of manganese oxides toward enhanced electrochemical capacitors

doi:10.1016/j.cej.2020.124293

	Insight into the role of interfacial reconstruction of manganese oxides toward enhanced electrochemical capacitors
	Zhang, Jie 1,3; Li, Wenli 1,3; Hu, Dandan 1; Shifa, Tofik Ahmed 2; Chen, Shuaichao 1; Xu, Guangwen 1; Cui, Yanbin 1,3
刊名	CHEMICAL ENGINEERING JOURNAL
	2020-05-15
卷号	388 页码:9
关键词	Sawtooth-shape MnO2 Activated graphene Cycling stability Asymmetric supercapacitor Interfacial reconstruction
ISSN号	1385-8947
DOI	10.1016/j.cej.2020.124293
英文摘要	The pursuit of facile synthetic methods for systematic control over the morphology and crystal phase of nanostructures has attracted a tremendous amount of interest. By utilizing the acid-induced layer-to-tunnel transition method of MnO2, we here for the first time report multi-layered sawtooth-shape MnO2 with relatively high mass loading. The optimized electrode exhibits durable activity with enhanced surface area, electrical conductivity and ionic diffusion. A high areal capacitance of 1781.8 mF/cm(2) is obtained and excellent rate performance can be corroborated from capacitance retention of 64.1% when the current density is increased by 45-fold. Our uniquely assembled heterostructure endows a large number of active sites and acts as electron superhighways to facilitate efficient charge transportation. Further coupling with activated graphene/CC anode, a flexible device with a maximum operating voltage of 2.2 V is assembled, delivering a high volumetric energy density of 4.3 mWh/cm(3) at a power density of 27.6 mW/cm(3) with outstanding cycling performance. The finding promotes the development of highly efficient faradaic electrode materials toward closing the gap between achieved and theoretical capacitance without limiting the mass loading.
资助项目	Fund of State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering, Chinese Academy of Sciences[MPCS-2019-A-03]
WOS关键词	ENERGY DENSITY ; MNO2 ; ELECTRODE ; SUPERCAPACITORS ; PERFORMANCE ; FABRICATION ; TRANSITION ; NANOSHEETS ; OXIDATION ; NANOWIRES
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000532784800017
资助机构	Fund of State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/40520]
专题	中国科学院过程工程研究所
通讯作者	Cui, Yanbin
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jie,Li, Wenli,Hu, Dandan,et al. Insight into the role of interfacial reconstruction of manganese oxides toward enhanced electrochemical capacitors[J]. CHEMICAL ENGINEERING JOURNAL,2020,388:9.
APA	Zhang, Jie.,Li, Wenli.,Hu, Dandan.,Shifa, Tofik Ahmed.,Chen, Shuaichao.,...&Cui, Yanbin.(2020).Insight into the role of interfacial reconstruction of manganese oxides toward enhanced electrochemical capacitors.CHEMICAL ENGINEERING JOURNAL,388,9.
MLA	Zhang, Jie,et al."Insight into the role of interfacial reconstruction of manganese oxides toward enhanced electrochemical capacitors".CHEMICAL ENGINEERING JOURNAL 388(2020):9.