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Cui Z, Wang T, Geng Z, Wan L, Liu Y, Xu S, Gao N, Li H, Yang M. CoNiO 2/Co 3O 4 Nanosheets on Boron Doped Diamond for Supercapacitor Electrodes. Nanomaterials (Basel) 2024; 14:474. [PMID: 38470803 DOI: 10.3390/nano14050474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 02/28/2024] [Accepted: 03/02/2024] [Indexed: 03/14/2024]
Abstract
Developing novel supercapacitor electrodes with high energy density and good cycle stability has aroused great interest. Herein, the vertically aligned CoNiO2/Co3O4 nanosheet arrays anchored on boron doped diamond (BDD) films are designed and fabricated by a simple one-step electrodeposition method. The CoNiO2/Co3O4/BDD electrode possesses a large specific capacitance (214 mF cm-2) and a long-term capacitance retention (85.9% after 10,000 cycles), which is attributed to the unique two-dimensional nanosheet architecture, high conductivity of CoNiO2/Co3O4 and the wide potential window of diamond. Nanosheet materials with an ultrathin thickness can decrease the diffusion length of ions, increase the contact area with electrolyte, as well as improve active material utilization, which leads to an enhanced electrochemical performance. Additionally, CoNiO2/Co3O4/BDD is fabricated as the positive electrode with activated carbon as the negative electrode, this assembled asymmetric supercapacitor exhibits an energy density of 7.5 W h kg-1 at a power density of 330.5 W kg-1 and capacity retention rate of 97.4% after 10,000 cycles in 6 M KOH. This work would provide insights into the design of advanced electrode materials for high-performance supercapacitors.
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Affiliation(s)
- Zheng Cui
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Tianyi Wang
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Ziyi Geng
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Linfeng Wan
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Yaofeng Liu
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Siyu Xu
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Nan Gao
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Hongdong Li
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Min Yang
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, College of Chemistry and Life Science, Chengdu Normal University, Chengdu 611130, China
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