Few-layer bismuth selenide cathode for low-temperature quasi-solid-state aqueous zinc metal batteries.

ABSTRACT: The performances of rechargeable batteries are strongly affected by the operating environmental temperature. In particular, low temperatures (e.g., ≤0 °C) are detrimental to efficient cell cycling. To circumvent this issue, we propose a few-layer Bi₂Se₃ (a topological insulator) as cathode material for Zn metal batteries. When the few-layer Bi₂Se₃ is used in combination with an anti-freeze hydrogel electrolyte, the capacity delivered by the cell at -20 °C and 1 A g^-1 is 1.3 larger than the capacity at 25 °C for the same specific current. Also, at 0 °C the Zn | |few-layer Bi₂Se₃ cell shows capacity retention of 94.6% after 2000 cycles at 1 A g^-1. This behaviour is related to the fact that the Zn-ion upta

SUBMITTER: Zhao Y 

PROVIDER: S-EPMC8825835 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature