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Aqueous zinc‐ion batteries (ZIBs) are considered as the promising candidate of flexible energy storage devices due to their high safety, eco‐friendliness, and low‐cost. However, conventional flexible aqueous ZIBs undergo severe capacity loss at bending and subzero temperature states. Herein, an anti‐freezing hydrogel electrolyte based on zinc tetrafluoroborate (Zn(BF4)2) and polyacrylamide (PAM) is...
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