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Synergistic Effect of In Doped ZnO/rGO Anode Material for Rechargeable Zn‐Ni Secondary Battery with High Specific Capacity
Author(s) -
Zhang Qiang,
Gai Liyan,
Cai Kedi,
Wang Erdong
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001935
Subject(s) - anode , faraday efficiency , materials science , battery (electricity) , graphene , doping , dissolution , indium , conductivity , chemical engineering , nanotechnology , metallurgy , optoelectronics , chemistry , electrode , power (physics) , physics , engineering , quantum mechanics
Zn−Ni secondary battery is a promising candidate as next generation of energy storage battery. However, suffering from the poor cycle performance, its commercialization remains rather challenging. The severe dendrite growth of Zn anode and the rapid capacity decay caused by its uncontrollable dissolution and poor electronic conductivity of ZnO are the main factors. Herein, we report a novel Indium (In) doped ZnO/rGO anode material to inhibit ZnO dissolution through the generated C−O−Zn bond between ZnO and graphene. Meanwhile, the capacity decay decline due to the enhanced electronic conductivity of ZnO by the In doping and combination of graphene. As a result, In doped ZnO/rGO anode material delivers a high specific capacity of 643.4 mAh g −1 (coulombic efficiency 97.63 %) and remains 531.3 mAh g −1 after 125 cycles at 0.5 C, which are significantly higher than bare ZnO.