Boosting Supercapacitor Performance of TiO2Nanobelts by Efficient Nitrogen Doping
Zhi, Jian1; Zhao, Wei1; Lin, Tianquan1; Huang, Fuqiang1,2
Source PublicationChemElectroChem
AbstractTiO2has great potential in the application of biocompatible supercapacitors. Unfortunately, because of its semiconducting nature, TiO2exhibits poor electrical conductivity and extremely low specific capacitance. Doping with other atoms is a facile way to enhance electrochemical activity of TiO2. However, the restricted solubility of substitutional dopants in bulk largely impaired the effectiveness of doping, resulting in quite limited capacitance improvement. To overcome this issue, we propose a two-step approach to efficiently dope TiO2nanobelts with nitrogen. High-level nitrogen doping (6.1 at. %) was achieved in the distinct crystalline core/disordered shell structured TiO2, boosting the specific capacitance of TiO2from 4 F g−1to 216 F g−1. Employing compressible, light-weight three-dimensional graphene as current collector, the symmetrical cell exhibits a volumetric energy density of 9.6 mWh cm−3, highly comparable with the supercapacitors based on conventional pseudocapacitive materials. These encouraging findings unambiguously smash the capacitance bottleneck of TiO2and open the door towards the application of TiO2in energy-storage systems. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
EI Accession Number20172403754610
EI KeywordsMagnetic semiconductors
EI Classification Number461.9.1 Immunology - 701.1 Electricity: Basic Concepts and Phenomena - 708.4 Magnetic Materials - 761 Nanotechnology - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 933 Solid State Physics
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Document Type期刊论文
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing; 100871, China
Recommended Citation
GB/T 7714
Zhi, Jian,Zhao, Wei,Lin, Tianquan,et al. Boosting Supercapacitor Performance of TiO2Nanobelts by Efficient Nitrogen Doping[J]. ChemElectroChem,2017,4(9):2328-2335.
APA Zhi, Jian,Zhao, Wei,Lin, Tianquan,&Huang, Fuqiang.(2017).Boosting Supercapacitor Performance of TiO2Nanobelts by Efficient Nitrogen Doping.ChemElectroChem,4(9),2328-2335.
MLA Zhi, Jian,et al."Boosting Supercapacitor Performance of TiO2Nanobelts by Efficient Nitrogen Doping".ChemElectroChem 4.9(2017):2328-2335.
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