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High‐Performance Ytterbium‐Doped V 2 O 5 ⋅ H 2 O Binder‐Free Thin‐Film Electrodes for Supercapacitors
Author(s) -
Yang Shu,
Cen Yuan,
Hu Bingbing,
Xu Chuanlan,
Li Yan,
Yu Jingjing,
Hu Bihao,
Meng Jiazhi,
Yu Danmei,
Chen Changguo
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100169
Subject(s) - materials science , electrode , thin film , electrochemistry , supercapacitor , doping , capacitance , analytical chemistry (journal) , nanotechnology , chemical engineering , optoelectronics , chemistry , chromatography , engineering
In this work, honeycomb‐like Yb‐doped V 2 O 5 ⋅ nH 2 O binder‐free thin film electrodes are synthesized via a simple and convenient sol‐gel method. Benefiting from the synergy of V 2 O 5 ⋅ nH 2 O and rare‐earth metal ion Yb 3+ , thin‐layer honeycomb‐like morphology formed upon the introduction of Yb 3+ into the V 2 O 5 ⋅ nH 2 O, which markedly promotes the electrochemical performance of the V 2 O 5 ⋅ H 2 O thin‐film electrode. After the condition optimization, 8 % Yb−V 2 O 5 ⋅ H 2 O exhibits superior electrochemical performance with a specific capacitance of 703 F g −1 (at 1 A g −1 ) and outstanding cycling stability. Besides, owing to the ultra‐high conductivity of oxide super‐P (OSP) nanoparticles, the V 2 O 5 ⋅ H 2 O@OSP‐4 binder‐free film electrode shows a high specific capacitance of 627 F g −1 , which was prepared by the same simple sol‐gel strategy. The assembled 8 % Yb−V 2 O 5 ⋅ nH 2 O//V 2 O 5 ⋅ nH 2 O@OSP‐4 device delivers a high specific energy density and excellent cycling stability. This study may have certain inspirations for the fabrication of thin‐film electrodes for high‐efficiency energy storage systems.