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Anion-Assisted Regulation of Solvation Structure for High-Performance Manganese-Organic Batteries
Zhizan Zhang1, Junjie Li2, Kang Zhou1
1Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
ACS Applied Materials & Interfaces
|April 24, 2026
Summary
Rechargeable manganese metal batteries (MMBs) show promise due to manganese
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Rechargeable manganese metal batteries (MMBs) offer advantages over zinc-based systems due to manganese's abundance and high theoretical capacity.
- Challenges include hydrogen evolution in aqueous electrolytes and sluggish kinetics/polarization in nonaqueous systems.
- Limited cathode options for reversible Mn2+ storage hinder MMB development.
Purpose of the Study:
- To develop a high-performance electrolyte for reversible manganese plating/stripping in MMBs.
- To investigate the effect of electrolyte composition on manganese ion solvation and desolvation kinetics.
- To demonstrate the stability and performance of MMBs with a novel electrolyte and cathode.
Main Methods:
- Design of a propylene carbonate (PC)-based electrolyte with MnBr2 and EMIMBF4.
- Analysis of Mn2+ solvation sheath structure and coordination number.
- Electrochemical testing of Mn||Mn symmetric cells and full cells with a PNTCDA cathode.
Main Results:
- The optimized electrolyte significantly reduces Mn2+ desolvation energy and deposition overpotential (from ~1 V to 0.15 V).
- Achieved high Coulombic efficiency (>95%) and excellent stability (>3000 h) in symmetric cells.
- Full cells demonstrated good rate capability and retained 80% capacity after 500 cycles.
Conclusions:
- Cooperative anion incorporation (Br- and BF4-) effectively regulates Mn2+ solvation structure in PC-based electrolytes.
- This strategy enables highly reversible Mn plating/stripping, addressing key limitations in MMBs.
- The developed MMB system shows potential for high-performance energy storage applications.
Keywords:
Mn plating/strippingdesolvation kineticsenergy storage mechanismmanganese metal batteriesnonaqueous electrolytespolyimide cathodesolvation structure regulationMore Related Videos
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