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Enhancing Ammonium-Ion Storage Capability of NH4V3O8 via an Interlayer Defect-Modulation Strategy
Yu-Ting Wang1, Pengcheng Su2, Kang Zhang2
1College of Environmental Economics, Henan Finance University, Zhengzhou 450046, China.
ACS Omega
|August 14, 2026
Summary
Researchers enhanced ammonium vanadate (NVO) cathode performance for ammonium-ion batteries by modulating interlayer ions. This strategy improves ion kinetics and expands interlayer spacing for better ammonium storage.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Ammonium vanadates (NVO) show promise as cathode materials for ammonium-ion batteries.
- However, their application is limited by slow ammonium-ion kinetics.
Purpose of the Study:
- To enhance the ammonium-ion storage capability of NH4V3O8 cathodes.
- To investigate the effect of interlayer cation modulation on NVO performance.
Main Methods:
- Proposing an interlayer cation-modulation strategy for NH4V3O8.
- Tuning the number of interlayer ammonium ions within the NVO structure.
- Evaluating performance in three-electrode and full-cell systems.
Main Results:
- Achieved expanded interlayer distance in the modulated NVO.
- Demonstrated weakened electrostatic repulsion between ammonium ions and the NVO host.
- Observed enhanced electrochemical performance in both tested systems.
Conclusions:
- Interlayer cation modulation is an effective strategy to improve ammonium-ion kinetics in NVO cathodes.
- The modified NVO exhibits superior ammonium-ion storage capability.
- This work promotes the application of NVO cathodes in aqueous ammonium-ion batteries.
