Quasi-solid-state Zn-air batteries with an atomically dispersed cobalt electrocatalyst and organohydrogel electrolyte.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35760794.
- Also identified by DOI 10.1038/s41467-022-31383-4 and PMC identifier 9237111.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
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 dimethyl sulfoxide. This design enables a cycling current density of 100 mA cm<sup>-2</sup> over 50 h at 25 °C. A low-temperature cycling stability of over 300 h (at 0.5 mA cm<sup>-2</sup>) with over 90% capacity retention at -60 °C and a broad temperature adaptability (-60 to 60 °C) are also demonstrated.