Yao, Di, Wu, Zongdeng, Song, Juanjuan, Cai, Li, Ouyang, Yu, Lei, Wu, Mathur, Sanjay ORCID: 0000-0003-2765-2693, Wu, Fengqin and Hao, Qingli (2020). Oxygen Vacancy Modulated LiMnxOy@C Three-Dimensional Nanosheet Arrays on Nickel Foam for Lithium-Ion Capacitor with High Performance. ACS Appl. Energ. Mater., 3 (5). S. 4840 - 4852. WASHINGTON: AMER CHEMICAL SOC. ISSN 2574-0962

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Abstract

The three-dimensional LiMnxOy@C (LMO@C) nanosheet arrays with rich oxygen vacancies were fabricated using a three-step method involving gamma-MnO2 electrodeposition on Ni foam combined with hydrothermal lithiation and carbon coating. The open-framework and porous structure of the LMO@C can remarkably facilitate the fast insertion/extraction of lithium-ion and charge transfer. The introduced oxygen vacancies and conducting carbon-shell can significantly improve the electrochemical property of an integrated electrode. The LMO@C electrode presents a higher mass capacitance (239.2 mAh g(-1) at 1 A g(-1)) and an enhanced cycling performance (nearly no decay after 10 000 cycles) compared with the LMO electrode. Additionally, a Li-ion capacitor (LIC) coin cell was assembled with Ni foam@LMO@C and activated carbon/Ni foam as the cathode and anode, respectively. The LIC can deliver 44.3 and 29.6 Wh kg(-1) energy density at the power density of 800 and 8000 W kg(-1), respectively, with superior cycling performance (80% capacitance retention after 4000 cycles). Thereby, the Ni foam@LMO@C electrode is promising for energy-storage devices due to its excellent electrochemical performance.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Yao, DiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wu, ZongdengUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Song, JuanjuanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cai, LiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ouyang, YuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lei, WuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, SanjayUNSPECIFIEDorcid.org/0000-0003-2765-2693UNSPECIFIED
Wu, FengqinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hao, QingliUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-332853
DOI: 10.1021/acsaem.0c00436
Journal or Publication Title: ACS Appl. Energ. Mater.
Volume: 3
Number: 5
Page Range: S. 4840 - 4852
Date: 2020
Publisher: AMER CHEMICAL SOC
Place of Publication: WASHINGTON
ISSN: 2574-0962
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SPINEL LIMN2O4 NANOWIRES; HYDROTHERMAL SYNTHESIS; CATHODE MATERIAL; ELECTRODEPOSITION; ELECTROLYTE; TEMPERATURE; BATTERY; NANOPARTICLES; STABILITY; ANODEMultiple languages
Chemistry, Physical; Energy & Fuels; Materials Science, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/33285

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