Nitrogen-doped black titania for high performance supercapacitors

作     者：Chongyin Yang Xin Wang Wujie Dong I-Wei Chen Zhou Wang Jijian Xu Tianquan Lin Hui Gu Fuqiang Huang 杨重寅;王鑫;董武杰;陈一苇;汪宙;徐吉健;林天全;顾辉;黄富强

作者机构：State Key Laboratory of High Performance Ceramics and Superfine MicrostructuresShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Department of Materials Science and EngineeringUniversity of PennsylvaniaPennsylvaniaPA 19104-6272USA State Key Laboratory of Rare Earth Materials Chemistry and Applications and National LaboratoryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China College of Chemistry and Molecular EngineeringZhengzhou UniversityZhengzhou 450001China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2020年第63卷第7期

页      面：1227-1234页

核心收录：

学科分类：081702[工学-化学工艺] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National key R&D Program of China(2016YFB0901600) the Key Research Program of Chinese Academy of Sciences(QYZDJ-SSWJSC013)Chen IW was supported by U.S.Department of Energy BES grant DE-FG02-11ER46814 used the facilities(Laboratory for Research on the Structure of Matter)supported by NSF grant DMR-1120901 

主　　题：black titania supercapacitor nitrogen-dopant N-mediated redox reactions 

摘      要：For energy storage system,it is still a huge challenge to achieve high energy density and high power density *** potential solution is to fabricate electrochemical capacitors(ECs),which store electric energy through surface ion adsorption or redox *** we report a new electrode material,heavy nitrogen-doped(9.29 at.%)black titania(TiO2-x:N).This unique hybrid material,consisting of conductive amorphous shells supported on nanocrystalline cores,has rapid N-mediated redox reaction(TiO2-xNy+zH++ze■-TiO2-xNyHz),especially in acidic solutions,providing a specific capacitance of 750 Fg-1at 2 m V s-1(707 Fg-1at 1 A g-1),great rate capability(503 F g-1at 20 Ag-1),and maintain stable after initial *** a new developed supercapacitor material,nitrogen-doped black titania may revive the oxide-based supercapacitors.