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- Title
Quasi-solid-state Zn-air batteries with an atomically dispersed cobalt electrocatalyst and organohydrogel electrolyte.
- Authors
Wang, Qichen; Feng, Qingguo; Lei, Yongpeng; Tang, Shuaihao; Xu, Liang; Xiong, Yu; Fang, Guozhao; Wang, Yuchao; Yang, Peiyao; Liu, Jingjing; Liu, Wei; Xiong, Xiang
- 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. Quasi-solid-state Zn-air batteries are limited by sluggish kinetics and low temperature incompatibility. Here, the authors use a single-atom catalyst and an organohydrogel electrolyte to enable a 100 mA cm−2 cycling current density at 25 °C and a −60 to 60 °C operational window.
- Subjects
SOLID state batteries; LITHIUM-air batteries; ELECTROLYTES; COBALT; STORAGE batteries; DIMETHYL sulfoxide; LOW temperatures
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-31383-4