Chengxiang Huang, Zhou Jiang, Fuxi Liu, Wenwen Li, Qing Liang, Zhenzhen Zhao, Xin Ge, Kexin Song, Lirong Zheng, Xin Zhou, Sifan Qiao, Wei Zhang, Weitao Zheng
In aqueous aluminum-ion batteries(AAIBs), the insertion/extraction chemistry of Al3+ often leads to poor kinetics, whereas the rapid diffusion kinetics of hydrated hydrogen ions (H3O+) may offer the solution. However, the presence of considerable Al3+ in the electrolyte hinders the insertion reaction of H3O+. Herein, we report how oxygen-deficient α-MoO3 nanosheets unlock selective H3O+ insertion in a mild aluminum-ion electrolyte. The abundant oxygen defects impede the insertion of Al3+ due to excessively strong adsorption, while allowing H3O+ to be inserted/diffused through the Grotthuss proton conduction mechanism...
April 22, 2024: Angewandte Chemie