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Li H, Ma Y, Zhang X, Zhang X, Di L. Plasma Engineering of Co 4N/CoN Heterostructure for Boosting Supercapacitor Performance. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3529. [PMID: 39063821 PMCID: PMC11278462 DOI: 10.3390/ma17143529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 07/09/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024]
Abstract
Supercapacitor electrode materials play a decisive role in charge storage and significantly affect the cost and capacitive performance of the final device. Engineering of the heterostructure of metal-organic framework (MOF)-derived transition metal nitrides (TMNs) can be conducive to excellent electrochemical performance owing to the synergistic effect, optimized charge transport/mass transfer properties, and high electrical conductivity. In this study, a Co4N/CoN heterostructure was incorporated into a nitrogen-doped support by radio-frequency (RF) plasma after simple pyrolysis of Co-based formate frameworks (Co-MFFs), with the framework structure well retained. Plasma engineering can effectively increase the ratio of Co4N in the Co4N/CoN heterostructure, accelerating the electron transfer rate and resulting in a rough surface due to the reduction effect of high-energy electrons and the etching effect of ions. Benefiting from the plasma modification, the obtained electrode material Co4N/CoN@C-P exhibits a high specific capacitance of 346.2 F·g-1 at a current density of 1 A·g-1, approximately 1.7 times that of CoN/Co4N@C prepared by pyrolysis. The specific capacitance of Co4N/CoN@C-P reaches 335.6 F·g-1 at 10 A·g-1, approximately 96.9% of that at 1 A·g-1, indicating remarkable rate capability. Additionally, the capacitance retention remains at 100% even after 1000 cycles, suggesting excellent cycling stability. The rational design and plasma engineering of the TMN heterostructures at the nanoscale are responsible for the excellent electrochemical performance of this novel composite material.
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Affiliation(s)
- Hong Li
- College of Physical Science and Technology, Dalian University, Dalian 116622, China; (H.L.); (Y.M.); (X.Z.)
| | - Yunzhe Ma
- College of Physical Science and Technology, Dalian University, Dalian 116622, China; (H.L.); (Y.M.); (X.Z.)
| | - Xulei Zhang
- Sunstone Energy Co., Ltd., Jiayuguan 735100, China;
| | - Xiuling Zhang
- College of Physical Science and Technology, Dalian University, Dalian 116622, China; (H.L.); (Y.M.); (X.Z.)
| | - Lanbo Di
- College of Physical Science and Technology, Dalian University, Dalian 116622, China; (H.L.); (Y.M.); (X.Z.)
- State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
- Key Laboratory of Advanced Technology for Aerospace Vehicles of Liaoning Province, Dalian University of Technology, Dalian 116024, China
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Lu L, Zhang B, Song J, Gao H, Wu Z, Shen H, Li Y, Lei W, Hao Q. Synthesis of MnO-Sn cubes embedding in nitrogen-doped carbon nanofibers with high lithium-ion storage performance. NANOTECHNOLOGY 2021; 33:115403. [PMID: 34874284 DOI: 10.1088/1361-6528/ac4064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 12/06/2021] [Indexed: 06/13/2023]
Abstract
In this paper, a carbon nanofiber (CNF) hybrid nanomaterial composed of MnO-Sn cubes embedding in nitrogen-doped CNF (MnO-Sn@CNF) is synthesized through electrospinning and post-thermal reduction processes. It exhibits good electrochemical lithium-ion storage performance as the anode, such as high reversible capacity, outstanding cycle performance (754 mAh g-1at 1 A g-1after 1000 cycles), and good rate capability (447 mAh g-1at 5 A g-1). The excellent electrochemical properties are derived from a unique nanostructure design. MnO-Sn@CNF has a three-dimensional conductive network with a stable core-shell structure, which improves the electrical conductivity and mechanical stability of the materials. In addition, the mesopores on the surface of carbon fibers can shorten the diffusion distance of lithium ions and promote the combination of active sites of the material with lithium ions. The internal MnO and Sn form a heterostructure, which enhances the stability of the physical structure of the electrode material. This material design method provides a reference strategy for the development of high-performance lithium-ion batteries anode.
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Affiliation(s)
- Longgang Lu
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Bin Zhang
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Juanjuan Song
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Haiwen Gao
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Zongdeng Wu
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Honglong Shen
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Yujunwen Li
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Wu Lei
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
| | - Qingli Hao
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, 210094, People's Republic of China
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