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Insight into the role of interfacial reconstruction of manganese oxides toward enhanced electrochemical capacitors
Zhang, Jie1,2; Li, Wenli1,2; Hu, Dandan1; Shifa, Tofik Ahmed3; Chen, Shuaichao1; Xu, Guangwen1; Cui, Yanbin1,2
2020-05-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume388Pages:9
AbstractThe 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.
KeywordSawtooth-shape MnO2 Activated graphene Cycling stability Asymmetric supercapacitor Interfacial reconstruction
DOI10.1016/j.cej.2020.124293
Language英语
WOS KeywordENERGY DENSITY ; MNO2 ; ELECTRODE ; SUPERCAPACITORS ; PERFORMANCE ; FABRICATION ; TRANSITION ; NANOSHEETS ; OXIDATION ; NANOWIRES
Funding ProjectFund of State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering, Chinese Academy of Sciences[MPCS-2019-A-03]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationFund of State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering, Chinese Academy of Sciences
WOS IDWOS:000532784800017
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40521
Collection中国科学院过程工程研究所
Corresponding AuthorCui, Yanbin
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
3.Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China
Recommended Citation
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.
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