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- 저자 : Najeeb ur Rehman Lashari (검색결과 1 건)
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Najeeb ur Rehman Lashari,Mingshu Zhao,Jun Wang,XINHAI HE,Irfan Ahmed,Miao Miao Liang,Songpon Tangsee,Xiaoping Song 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
The energy storage properties of layered metal vanadate, especially alkali metal vanadates have beenextensively studied. Metal vanadates have a more robust electrochemical output in contrast with pristinevanadium oxides. However, the detailed processes underlying the efficiency contrast of vanadates andvanadium oxides have rarely been studied. Herein a facile hydrothermal and low-temperature polymerizationmethod was introduced to synthesize KV3O8 and KV3O8@PPy nanowire bundles as anode materialfor an aqueous rechargeable Lithium batteries. The nanowires are composed of KV3O8·0.59H2O calculatedusing thermal gravimetric analysis (TGA). Successfully synthesized layered vanadium based KV3O80.59H2O (KVO) and KV3O8 0.59H2O@PPy (KVO@PPy) nanowires and investigated the source of theimproved electrochemical efficiency of PPy coated potassium vanadates compared to pristine KVO usingcrystal structure analysis and electrochemical tests. We demonstrated increase in electrochemical stabilityfor KVO@PPy caused by synergistic effect of K+ in vanadate nanowires and PPy coating. In KVO theoxygen atoms have close contact with the K ions, and the stable K+ serve as ‘‘pillars” between interlayersto shield the layered structures from collapse during the charge/discharge phase, while the PPy reducescharge transfer resistance. This research adds helps us design better electrode materials to be used as ananode material for ARLB using alkali metal vanadate.
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