A high-performance flexible aqueous Al ion rechargeable battery with long cycle life
© 2019 Elsevier B.V. With the increasing development of flexible and wearable electronic devices, exploration of advanced power supplies with excellent electrochemical performance, safety and flexibility is highly urgent. In light of natural abundance as well as three-electron redox properties, rechargeable Al ion batteries (AIBs) draw much attention while they still face great challenge of limited Al3+ storage material as well as poorly ionic conductive electrolyte. In our work, an intercalation MoO3 anode and VOPO4 cathode are proposed and mechanically robust gelatin-polyacrylamide hydrogel electrolyte is utilized to fabricate a safe and flexible high-performance rechargeable AIB. The as-assembled AIB exhibits high rate capability of 6 A g−1, high discharge capacity of 88 mAh g−1 and long cyclic stability of 86.2% capacity retention even after 2800 cycles. Besides, the AIB possesses high safety and mechanical flexibility properties, which could serve as reliable power source when even being bent, punctured or cut. Additionally, the aqueous AIB could power 1 m long and 100 cm2 electroluminescent panels, demonstrating their good Al storage property. Considering their favourable electrochemical performance, robustness and safety, the flexible aqueous AIB in our work is believed to open up new avenue in flexible and wearable energy.
Wang, P; Chen, Z; Wang, H; Ji, Z; Feng, Y; Wang, J; Liu, J; Hu, M; Fei, J; Gan, W; Huang, Y
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