Ice crystal sublimation for easily producing MnO2 cathodes with hierarchically porous structure and enhanced cyclic reversibility

Xiangru Si; Ruijie Zhu; Yang Yang; Huijun Yang; Nan Sheng; Chunyu Zhu

doi:10.1039/d3nr04028c

Ice crystal sublimation for easily producing MnO₂ cathodes with hierarchically porous structure and enhanced cyclic reversibility

Nanoscale. 2023 Nov 16;15(44):17758-17764. doi: 10.1039/d3nr04028c.

Authors

Xiangru Si¹, Ruijie Zhu², Yang Yang³, Huijun Yang³, Nan Sheng¹, Chunyu Zhu¹

Affiliations

¹ School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China. zcyls@cumt.edu.cn.
² Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan.
³ National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba 305-8568, Japan.

PMID: 37882093
DOI: 10.1039/d3nr04028c

Abstract

The charge/discharge performance of rechargeable aqueous zinc ion batteries (RAZIBs) at high currents is often unsatisfactory due to the cathode preparation process and the use of hydrophobic binders. By adding freeze-drying treatment to the preparation process of the cathodes, MnO₂ cathodes with hierarchically porous structures are obtained, which provide additional channels for ion transfer, thus greatly enhancing the charge/discharge performance in aqueous Zn-MnO₂ batteries.