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Planar Fully Stretchable Lithium-Ion Batteries Based on a Lamellar Conductive Elastomer
Xiaodan Wang1, Yao Lu2, Dongsheng Geng1
1Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
ACS Applied Materials & Interfaces
|November 13, 2020
Summary
Researchers developed a fully stretchable lithium-ion battery (LIB) for wearable electronics. This new battery maintains stable performance and over 70% capacity after 100 cycles with 150% stretch.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Stretchable lithium-ion batteries (LIBs) are crucial for wearable electronics.
- Challenges remain in creating fully stretchable LIBs, particularly in integrating components.
Purpose of the Study:
- To develop a simple strategy for fabricating fully stretchable LIBs.
- To demonstrate stable electrochemical performance of the stretchable battery under mechanical strain.
Main Methods:
- Electrostatic spraying of anode and cathode materials onto an elastic current collector.
- Fabrication of a polyvinylidene fluoride/thermoplastic polyurethane nanofiber separator.
- Hot-sandwiching the separator between the electrodes to form the full battery.
Main Results:
- A fully stretchable LIB was successfully fabricated.
- The battery demonstrated stable electrochemical performance during repeatable release-stretch cycles.
- Achieved a stable capacity of 6 mA•h/cm² at 0.5 C and retained over 70% capacity after 100 cycles with ~150% stretch.
Conclusions:
- The reported strategy enables the creation of scalable, stretchable electrodes and separators for full LIBs.
- The fabricated stretchable LIB shows promising potential as a power source for advanced wearable devices.
