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Revealing the Charg...
Revealing the Charge Storage Mechanism of Nickel Oxide Electrochromic Supercapacitors
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- Luo, Zhihui (författare)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China.
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- Liu, Lei (författare)
- Beihang Univ, Sch Phys, Beijing 100191, Peoples R China.
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- Yang, Xiaoyong (författare)
- Uppsala universitet,Materialteori,Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China.
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- Luo, Xuan (författare)
- China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Sichuan, Peoples R China.
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- Bi, Peng (författare)
- Southwest Univ Sci & Technol, Sch Sci, Mianyang 621010, Sichuan, Peoples R China.
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- Fu, Zhenjin (författare)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China.
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- Pang, Aimin (författare)
- Hubei Inst Aerosp Chemotechnol, Sci & Technol Aerosp Chem Power Lab, Xiangyang 441003, Hubei, Peoples R China.
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- Li, Wei (författare)
- Hubei Inst Aerosp Chemotechnol, Sci & Technol Aerosp Chem Power Lab, Xiangyang 441003, Hubei, Peoples R China.
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- Yi, Yong (författare)
- Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China.
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Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China Beihang Univ, Sch Phys, Beijing 100191, Peoples R China. (creator_code:org_t)
- 2020-08-03
- 2020
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 12:35, s. 39098-39107
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Nickel oxide (NiO) is considered one of the most promising positive anode materials for electrochromic supercapacitors. Nevertheless, a detailed mechanism of the electrochromic and energy storage process has yet to be unraveled. In this research, the charge storage mechanism of a NiO electrochromic electrode was investigated by combining the in-depth experimental and theoretical analyses. Experimentally, a kinetic analysis of the Li-ion behavior based on the cyclic voltammetry curves reveals the major contribution of surface capacitance versus total capacity, providing fast reaction kinetics and a highly reversible electrochromic performance. Theoretically, our model uncovers that Li ions prefer to adsorb at fcc sites on the NiO(1 1 1) surface, then diffuse horizontally over the plane, and finally migrate in the bulk. More significantly, the calculated theoretical surface capacity (106 mA h g(-1)) accounts for about 77.4% of the total experimental capacity (137 mA h g(-1)), indicating that the surface storage process dominates the whole charge storage, which is in accordance with the experimental results. This work provides a fundamental understanding of transition-metal oxides for application in electrochromic supercapacitors and can also promote the exploration of novel electrode materials for high-performance electrochromic supercapacitors.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- electrochromic supercapacitor
- transition-metal oxides
- first-principles calculation
- reaction kinetic analysis
- charge storage mechanism
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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