화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.108, 366-373, April, 2022
DOI10.1016/j.jiec.2022.01.015  Export Citation
Improved cycling performance of polypyrrole coated potassium trivanadate as an anode for aqueous rechargeable lithium batteries
Najeeb ur Rehman Lashari1, †, Mingshu Zhao2, †, Jun Wang1, 3, Xinhai He1, Irfan Ahmed4, 5, Miao Miao Liang1, Songpon Tangsee6, and Xiaoping Song2
  • 1School of Material Science and Engineering, Xi’an Polytechnic University, Xi’an 710049, Shaanxi, China
  • 2School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Xi’an Jiaotong University, Xi’an 510000, Shaanxi, China
  • 3Department of Material Science, Winsor University, Windsor, Ontario, Canada
  • 4Department of Physics, City University of Hong Kong, Kowloon, Hong Kong
  • 5Electrical Engineering Department, Sukkur IBA University, Airport Road, Sukkur 65200, Pakistan
  • 6Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
E-mail:,
The energy storage properties of layered metal vanadate, especially alkali metal vanadates have been extensively studied. Metal vanadates have a more robust electrochemical output in contrast with pristine vanadium oxides. However, the detailed processes underlying the efficiency contrast of vanadates and vanadium oxides have rarely been studied. Herein a facile hydrothermal and low-temperature polymerization method was introduced to synthesize KV3O8 and KV3O8@PPy nanowire bundles as anode material for an aqueous rechargeable Lithium batteries. The nanowires are composed of KV3O8·0.59H2O calculated using thermal gravimetric analysis (TGA). Successfully synthesized layered vanadium based KV3O8 0.59H2O (KVO) and KV3O8 0.59H2O@PPy (KVO@PPy) nanowires and investigated the source of the improved electrochemical efficiency of PPy coated potassium vanadates compared to pristine KVO using crystal structure analysis and electrochemical tests. We demonstrated increase in electrochemical stability for KVO@PPy caused by synergistic effect of K+ in vanadate nanowires and PPy coating. In KVO the oxygen atoms have close contact with the K ions, and the stable K+ serve as ‘‘pillars” between interlayers to shield the layered structures from collapse during the charge/discharge phase, while the PPy reduces charge transfer resistance. This research adds helps us design better electrode materials to be used as an anode material for ARLB using alkali metal vanadate.
Keywords:Vanadium;Charge–discharge;Electrochemical impedance spectroscopy;ARLB
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