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Engineering High Voltage Aqueous Aluminum-Ion Batteries
Erhai Hu1, Bei-Er Jia2, Qiang Zhu3
1Energy Research Institute @ NTU, Nanyang Technological University, Singapore, 637141, Singapore.
Small (Weinheim an Der Bergstrasse, Germany)
|January 13, 2024
Summary
Aqueous aluminum-ion batteries (AAIBs) show promise for energy storage but face voltage limitations. Strategies like interface enhancement and tailored electrolytes are proposed to overcome these challenges for better performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- The global energy transition demands advanced storage solutions beyond lithium-ion batteries.
- Aqueous aluminum-ion batteries (AAIBs) offer a sustainable and abundant alternative.
- Current AAIBs underperform due to voltage limitations compared to theoretical potentials.
Purpose of the Study:
- To critically examine the voltage challenges hindering AAIB performance.
- To identify key factors contributing to the voltage gap in AAIBs.
- To propose strategies for enhancing AAIB voltage output.
Main Methods:
- Review and analysis of existing literature on AAIB voltage limitations.
- Exploration of electrochemical principles governing AAIB performance.
- Identification of material and electrolyte factors influencing voltage.
Main Results:
- Voltage deficits in AAIBs are linked to aluminum reduction potential, hydrogen evolution, and passivation.
- Underpotential deposition, alloying, and interface engineering show potential for improvement.
- Optimized electrolytes and advanced cathode designs are crucial for voltage enhancement.
Conclusions:
- Addressing voltage challenges is key to unlocking the full potential of AAIBs.
- Proposed strategies offer a roadmap for developing high-performance AAIBs.
- AAIBs can play a significant role in future renewable energy storage systems.
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