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Biomimetic Superstructured Interphase for Aqueous Zinc-Ion Batteries
Yan Ai1, Chaochao Yang1, Ziqing Yin1
1Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and iChEM, Fudan University, Shanghai 200433, P. R. China.
Journal of the American Chemical Society
|May 24, 2024
Summary
Researchers developed a biomimetic superstructured interphase using mesoporous polydopamine for stable aqueous zinc-ion batteries (AZIBs). This innovation prevents dendrites and side reactions, enhancing battery performance and lifespan.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Aqueous zinc-ion batteries (AZIBs) face challenges from dendrites and side reactions due to unstable Zn-electrolyte interphases.
- These issues limit the practical application and lifespan of AZIBs.
Purpose of the Study:
- To construct a robust superstructured solid electrolyte interphase for stable Zn anodes in AZIBs.
- To overcome the trade-off between mechanical robustness and ionic conductivity in battery interphases.
Main Methods:
- Utilized mesoporous polydopamine (2D-mPDA) platelets as building blocks for the interphase.
- Investigated the interphase structure, mimicking nacre's "brick-and-mortar" design with ordered mesopores.
- Employed experimental results and simulations to analyze ion transport and surface chemistry.
Main Results:
- The biomimetic interphase demonstrated a "brick-and-mortar" structure with transmembrane channels.
- Surface functional groups (-OH and -NH) facilitated Zn2+ desolvation and homogenized flux, inhibiting dendrites.
- Achieved ultralow nucleation potential (35 mV), high Coulombic efficiency (99.8% over 1500 cycles), and prolonged lifespan (>580 h at 20 mA cm-2).
Conclusions:
- The developed superstructured interphase ensures stable Zn anode performance in AZIBs.
- This approach effectively inhibits dendrites and side reactions, enhancing battery longevity.
- The biomimetic strategy offers a promising route for advanced rechargeable aqueous metal-ion batteries.
