Abstract
Aqueous zinc-ion batteries are regarded as a novel scheme for the next generation of functional batteries due to their high safety and environment-friendly performance. Nevertheless, aqueous zinc-ion batteries suffer from poor cycling stability, which is mainly due to the poor structural stability and distortion of the electrode materials during charging and discharging. Herein, Ni-PTA-Mn, an organic metal framework porous material with a large specific surface area and conductive function, was directly synthesized by one-step hydrothermal method. When it was directly applied as the cathode of aqueous zinc-ion batteries, the batteries exhibited a discharge specific capacity of up to 139 mAh g−1 (0.1 A g−1) and an capacity retention rate of about 93% at 1 A g−1 (after 100 cycles). Outstanding electrochemical performance was mainly attributed to proton conductivity through the formation of H-bond networks inside the framework backbone.
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