Ionically Conductive Tunnels in h-WO₃ Enable High-Rate NH₄ ⁺ Storage.

ABSTRACT: Compared to the commonly applied metallic ion charge carriers (e.g., Li⁺ and Na⁺ ), batteries using nonmetallic charge carriers (e.g., H⁺ and NH₄ ⁺ ) generally have much faster kinetics and high-rate capability thanks to the small hydrated ionic sizes and nondiffusion control topochemistry. However, the hosts for nonmetallic charge carriers are still limited. In this work, it is suggested that mixed ionic-electronic conductors can serve as a promising host for NH₄ ⁺ storage. Using hexagonal tungsten oxide (h-WO₃ ) as an example, it is shown that the existence of ionic conductive tunnels greatly promotes the high-rate NH₄ ⁺ storage. Specifically, a much higher capacity of 82 mAh g

SUBMITTER: Zhang YZ 

PROVIDER: S-EPMC8981906 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature