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Oxygen vacancy-rich doped CDs@graphite felt-600 heterostructures for high-performance supercapacitor electrodes.
Chen, Yashi; Huang, Danlian; Lei, Lei; Chen, Sha; Liu, Xigui; Cheng, Min.
Afiliación
  • Chen Y; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China. huangdanlian@hnu.edu.cn and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
  • Huang D; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China. huangdanlian@hnu.edu.cn and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
  • Lei L; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China. huangdanlian@hnu.edu.cn and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
  • Chen S; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China. huangdanlian@hnu.edu.cn and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
  • Liu X; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China. huangdanlian@hnu.edu.cn and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
  • Cheng M; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China. huangdanlian@hnu.edu.cn and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
Nanoscale ; 13(9): 4995-5005, 2021 Mar 12.
Article en En | MEDLINE | ID: mdl-33635307
Carbon dots (CDs) have attracted much attention owing to their distinctive 0D chemical structure, ultra-small size, and intrinsic surface/edge defects, and have been widely used in many kinds of research fields. In this work, a facile method to synthesize an oxygen vacancy-rich doped CDs@graphite felt-600 heterostructure with outstanding electrochemical properties is presented. The electron spin resonance (ESR) provides clear evidence for the existence of abundant oxygen vacancies in the CDs@graphite felt-600 heterostructure. The as-synthesized CDs@graphite felt-600 shows superior areal specific capacitance (5.99 F cm-2), due to abundant oxygen vacancies and extensive surface/edge defects in the heterostructure. In addition, a home-made coin cell supercapacitor (SC) with CDs@graphite felt-600 as the electrode delivers a large areal energy density of 20.7 µW h cm-2 at a power density of 150.0 µW cm-2. To determine the charge storage mechanism at the interface of CDs@graphite felt-600, the binding energies between the CDs and graphite felt are calculated by density functional theory (DFT).
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido