兰州大学机构库 >物理科学与技术学院
Oxygen vacancies enriched nickel cobalt based nanoflower cathodes: Mechanism and application of the enhanced energy storage
Ye, Jiahui1; Zhai, Xingwu1; Chen, Long1; Guo, Wen1; Gu, Tiantian1; Shi, Yulin1; Hou, Juan1; Han, Fei2; Liu, Yi3; Fan, Changchun1; Wang, Gang1; Peng, SL(彭尚龙)4; Guo, Xuhong1,5
2021-11-01
Source PublicationJournal of Energy Chemistry
ISSN2095-4956
Volume62Pages:252-261
AbstractThe rational design of oxygen vacancies and electronic microstructures of electrode materials for energy storage devices still remains a challenge. Herein, we synthesize nickel cobalt-based oxides nanoflower arrays assembled with nanowires grown on Ni foam via the hydrothermal process followed annealing process in air and argon atmospheres respectively. It is found that the annealing atmosphere has a vital influence on the oxygen vacancies and electronic microstructures of resulting NiCo2O4 (NCO-Air) and CoNiO2 (NCO-Ar) products, which NCO-Ar has more oxygen vacancies and larger specific surface area of 163.48 m2/g. The density functional theory calculation reveals that more oxygen vacancies can provide more electrons to adsorb –OH free anions resulting in superior electrochemical energy storage performance. Therefore, the assembled asymmetric supercapacitor of NCO-Ar//active carbon delivers an excellent energy density of 112.52 Wh/kg at a power density of 558.73 W/kg and the fabricated NCO-Ar//Zn battery presents the specific capacity of 180.20 mAh/g and energy density of 308.14 Wh/kg. The experimental measurement and theoretical calculation not only provide a facile strategy to construct flower-like mesoporous architectures with massive oxygen vacancies, but also demonstrate that NCO-Ar is an ideal electrode material for the next generation of energy storage devices. © 2021 Science Press
KeywordCathodes Density functional theory Energy storage Nanoflowers Oxygen vacancies Storage (materials) Supercapacitor Cobalt-based Electrode material Electronic microstructures Energy Energy density Flower-like microstructure Hydrothermal process Ni foam Oxygen vacancy defects Rational design
PublisherElsevier B.V.
DOI10.1016/j.jechem.2021.03.030
Indexed ByEI
Language英语
EI Accession Number20211810279931
EI KeywordsCobalt compounds
EI Classification Number525.7 Energy Storage ; 694.4 Storage ; 704.1 Electric Components ; 761 Nanotechnology ; 922.1 Probability Theory ; 931.3 Atomic and Molecular Physics ; 931.4 Quantum Theory ; Quantum Mechanics ; 933.1 Crystalline Solids
Original Document TypeJournal article (JA)
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/451837
Collection物理科学与技术学院
Corresponding AuthorChen, Long
Affiliation1.Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi; Xinjiang; 832003, China;
2.Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, College of Materials Science and Engineering, Hunan University, Changsha; Hunan; 410082, China;
3.Institut für Chemie, AG Elektrochemie, Technische Universität Chemnitz, Chemnitz; 09111, Germany;
4.National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, School of Physical Science and Technology, Lanzhou University, Lanzhou; Gansu; 730000, China;
5.State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai; 200237, China
Recommended Citation
GB/T 7714
Ye, Jiahui,Zhai, Xingwu,Chen, Long,et al. Oxygen vacancies enriched nickel cobalt based nanoflower cathodes: Mechanism and application of the enhanced energy storage[J]. Journal of Energy Chemistry,2021,62:252-261.
APA Ye, Jiahui.,Zhai, Xingwu.,Chen, Long.,Guo, Wen.,Gu, Tiantian.,...&Guo, Xuhong.(2021).Oxygen vacancies enriched nickel cobalt based nanoflower cathodes: Mechanism and application of the enhanced energy storage.Journal of Energy Chemistry,62,252-261.
MLA Ye, Jiahui,et al."Oxygen vacancies enriched nickel cobalt based nanoflower cathodes: Mechanism and application of the enhanced energy storage".Journal of Energy Chemistry 62(2021):252-261.
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