High-Energy and High-Power Pseudocapacitor–Battery Hybrid Sodium-Ion Capacitor with Na+ Intercalation Pseudocapacitance Anode

Nano-Micro Letters

Yunlong Zhao¹  Qiulong Wei²  Dong-Liang Peng²  Qidong Li³  Liqiang Mai⁴  Shuangshuang Tan⁴  Jun Dong⁴  Yalong Jiang⁴ 

[1] Advanced Technology Institute, University of Surrey, Surrey GU2 7XH, Guildford, UK;Department of Materials Science and Engineering, Fujian Key Laboratory of Materials Genome, College of Materials, Xiamen University, 361005, Xiamen, People’s Republic of China;Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, 518055, Shenzhen, People’s Republic of China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070, Wuhan, People’s Republic of China;

关键词: Sodium-ion capacitors;    Pseudocapacitance;    Hybrid capacitors;    Two-dimensional materials;    Iron vanadate;   

DOI  :  10.1007/s40820-020-00567-2

来源: Springer

【 摘 要 】

tsLayered iron vanadate ultrathin nanosheets (FeVO UNSs) with a thickness of ~ 2.2 nm were synthesized by a sonicate-assisted method.Pseudocapacitive Na+ intercalation of FeVO UNSs anode delivers high initial coulombic efficiency (93.86%), high reversible capacity (292 mAh g−1), excellent rate capability, and remarkable cycling stability.A pseudocapacitor–battery hybrid SIC is assembled with the elimination of presodiation and delivers high energy and power densities.

【 授权许可】

CC BY