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Decoupling "Cling-Cover-Capture" Triple Effects on Stable Zn Anode/Electrolyte Interface
Quan Zong1,2, Yifei Yu1, Chaofeng Liu3
1College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, Zhejiang, People's Republic of China.
ACS Nano
|September 24, 2024
Summary
Aspartame (APM) stabilizes zinc anodes in aqueous electrolytes by forming a protective interface. This prevents dendrite growth and side reactions, significantly enhancing battery lifespan and efficiency.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- The electrochemical performance of zinc anodes is critically dependent on the anode/electrolyte interface.
- Uncontrolled interfacial reactions lead to dendrite growth and reduced battery lifespan.
Purpose of the Study:
- To investigate the use of aspartame (APM) to engineer a stable zinc anode/electrolyte interface.
- To elucidate the mechanism by which APM enhances zinc anode stability and electrochemical performance.
Main Methods:
- Electrochemical testing of zinc anodes in aqueous electrolytes with and without APM.
- Analysis of the zinc anode/electrolyte interface using surface-sensitive techniques.
- Fabrication and testing of Zn||NH4V4O10 full cells to evaluate APM's impact on practical device performance.
Main Results:
- Aspartame (APM) exhibits synergistic "cling-cover-capture" effects at the zinc anode surface.
- APM effectively homogenizes Zn2+ flux and suppresses interfacial water, preventing dendrite growth and side reactions.
- Zinc anodes with APM demonstrated a cycle lifespan of 5100 h and an average Coulombic efficiency of 99.73% over 1600 cycles.
- Full cells utilizing APM-modified anodes showed improved rate capability and cycling durability.
Conclusions:
- Aspartame (APM) acts as an effective interface stabilizer for aqueous zinc anodes.
- The unique interfacial chemistry imparted by APM significantly enhances the stability, reversibility, and cycle life of zinc-based batteries.
- APM holds promise for developing high-performance and long-lasting aqueous zinc batteries.
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