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Dynamically Resettable Electrode-Electrolyte Interface through Supramolecular Sol-Gel Transition Electrolyte for
Pengzhou Li1, Meng Liao1, Shuquan Cui1
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai, 200438, P. R. China.
Angewandte Chemie (International Ed. in English)
|February 28, 2023
Summary
This study introduces a novel supramolecular sol-gel transition electrolyte (SGTE) for flexible batteries. This adaptable electrolyte self-repairs interfaces, enhancing durability and performance in wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Flexible batteries are crucial for wearable electronics but face challenges with electrode-electrolyte interface stability during deformation.
- Existing gel electrolytes often lead to irreversible capacity loss or battery failure due to interface vulnerability.
Purpose of the Study:
- To design a novel supramolecular sol-gel transition electrolyte (SGTE) capable of dynamic deformation accommodation and interface repair.
- To enhance the durability and performance of flexible batteries through a self-healing electrolyte.
Main Methods:
- Development of an SGTE utilizing Pluronic micellization and host-guest interactions between α-cyclodextrin (α-CD) and polyethylene oxide.
- Investigating the electrolyte's controllable rewetting properties at low temperatures for interface repair.
- Fabricating and testing flexible aqueous zinc batteries with the novel SGTE.
Main Results:
- The SGTE demonstrated dynamic accommodation to complex deformations, maintaining interface integrity.
- Controllable rewetting at low temperatures enabled efficient repair of electrode-electrolyte interfaces.
- Constructed flexible aqueous zinc batteries exhibited high durability and stable performance.
Conclusions:
- The developed SGTE offers a promising solution for overcoming interface instability in flexible batteries.
- This supramolecular approach provides new insights for creating highly durable and resettable flexible energy storage devices.
- The SGTE design contributes to advancing the field of flexible electronics power solutions.
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