Pre-intercalation of Ammonium Ions in Layered δ-MnO2 Nanosheets for High-Performance Aqueous Zinc-Ion Batteries

Haixin Yao, Huan Yu, Yaqi Zheng, Nian Wu Li, Sheng Li, Deyan Luan, Xiong Wen (David) Lou*, Le Yu*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

99 Citations (Scopus)

Abstract

Layered manganese dioxide is a promising cathode candidate for aqueous Zn-ion batteries. However, the narrow interlayer spacing, inferior intrinsic electronic conductivity and poor structural stability still limit its practical application. Herein, we report a two-step strategy to incorporate ammonium ions into manganese dioxide (named as AMO) nanosheets as a cathode for boosted Zn ion storage. K+-intercalated δ-MnO2 nanosheets (KMO) grown on carbon cloth are chosen as the self-involved precursor. Of note, ammonium ions could replace K+ ions via a facile hydrothermal reaction to enlarge the lattice space and form hydrogen-bond networks. Compared with KMO, the structural stability and the ion transfer kinetics of the layered AMO are enhanced. As expected, the obtained AMO cathode exhibits remarkable electrochemical properties in terms of high reversible capacity, decent rate performance and superior cycling stability over 10000 cycles. © 2023 Wiley-VCH GmbH.
Original languageEnglish
Article numbere202315257
JournalAngewandte Chemie - International Edition
Volume62
Issue number51
Online published6 Nov 2023
DOIs
Publication statusPublished - 18 Dec 2023

Research Keywords

  • Ammonium Ions
  • Hydrogen Bonds
  • Pre-Intercalation
  • Zn-Ion Batteries
  • δ-MnO2

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