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Quasi-solid-state Zn-air batteries with an atomically dispersed cobalt electrocatalyst and organohydrogel electrolyte.

ABSTRACT: Quasi-solid-state Zn-air batteries are usually limited to relatively low-rate ability (<10 mA cm^-2), which is caused in part by sluggish oxygen electrocatalysis and unstable electrochemical interfaces. Here we present a high-rate and robust quasi-solid-state Zn-air battery enabled by atomically dispersed cobalt sites anchored on wrinkled nitrogen doped graphene as the air cathode and a polyacrylamide organohydrogel electrolyte with its hydrogen-bond network modified by the addition of dimethyl sulfoxide. This design enables a cycling current density of 100 mA cm^-2 over 50 h at 25 °C. A low-temperature cycling stability of over 300 h (at 0.5 mA cm^-2) with over 90% capacity retention at -60 °C and a broad temperature adaptability (-60 to 60 °C) are also demonstrated.

SUBMITTER: Wang Q

PROVIDER: S-EPMC9237111 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Quasi-solid-state Zn-air batteries with an atomically dispersed cobalt electrocatalyst and organohydrogel electrolyte.

Wang Qichen Q Feng Qingguo Q Lei Yongpeng Y Tang Shuaihao S Xu Liang L Xiong Yu Y Fang Guozhao G Wang Yuchao Y Yang Peiyao P Liu Jingjing J Liu Wei W Xiong Xiang X

Nature communications 20220627 1

Quasi-solid-state Zn-air batteries are usually limited to relatively low-rate ability (<10 mA cm<sup>-2</sup>), which is caused in part by sluggish oxygen electrocatalysis and unstable electrochemical interfaces. Here we present a high-rate and robust quasi-solid-state Zn-air battery enabled by atomically dispersed cobalt sites anchored on wrinkled nitrogen doped graphene as the air cathode and a polyacrylamide organohydrogel electrolyte with its hydrogen-bond network modified by the addition of ...[more]

PMID: 35760794

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