Defect Engineering of Oxygen‐Deficient Manganese Oxide to Achieve High‐Performing Aqueous Zinc Ion Battery
National University of Singapore · National University Heart Centre Singapore · +3 more institutions
Abstract
Abstract A major limitation of MnO 2 in aqueous Zn/MnO 2 ion battery applications is the poor utilization of its electrochemical active surface area. Herein, it is shown that by generating oxygen vacancies ( V O ) in the MnO 2 lattice, Gibbs free energy of Zn 2+ adsorption in the vicinity of V O can be reduced to thermoneutral value (≈0.05 eV). This suggests that Zn 2+ adsorption/desorption process on oxygen‐deficient MnO 2 is more reversible as compared to pristine MnO 2 . In addition, because of the fact that fewer electrons are needed for ZnO bonding in oxygen‐deficient MnO 2 , more valence electrons can be contributed into the delocalized electron cloud of the material, which aids in enhancing the…
Citation impact
- FWCI
- 45.88
- Percentile
- 100%
- References
- 41
Authors
10- TXTing Xiong
National University of Singapore, National University Heart Centre Singapore
- ZGZhi Gen Yu
Agency for Science, Technology and Research, Institute of High Performance Computing
- HWHaijun Wu
National University of Singapore
- YDYonghua Du
Agency for Science, Technology and Research, Institute of Chemical and Engineering Sciences
- QXQidong Xie
National University of Singapore
Topics & keywords
- Birnessite
- Materials science
- Electrochemistry
- Aqueous solution
- Oxygen
- Manganese
- Delocalized electron
- Valence (chemistry)