A Safe High-Performance All-Solid-State Lithium–Vanadium Battery with a Freestanding V2O5 Nanowire Composite Paper Cathode
2016
Zhang, Yue | Lai, Jingyuan | Gong, Yudong | Hu, Yongming | Liu, Jin | Sun, Chunwen | Wang, Zhong Lin
The electronic conductivity and structural stability are still challenges for vanadium pentoxide (V₂O₅) as cathode materials in batteries. Here, we report a V₂O₅ nanowire–reduced graphene oxide (rGO) composite paper for direct use as a cathode without any additives for high-temperature and high-safety solid polymer electrolyte [PEO-MIL-53(Al)-LiTFSI] lithium–vanadium batteries. The batteries can show a fast and stable lithium-ion-storage performance in a wide voltage window of 1.0–4.0 V versus Li⁺/Li at 80 °C, in which with an average capacity of 329.2 mAh g–¹ at 17 mA g–¹ and a stable cycling performance over 40 cycles are achieved. The excellent electrochemical performance is mainly ascribed to integration of the electronic conductivity of rGO and interconnected networks of the V₂O₅ nanowires and solid electrolyte. This is a promising lithium battery for flexible and highly safe energy-storage devices.
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