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Customized Kirigami Electrodes for Flexible and Deformable Lithium-Ion Batteries
Yinhua Bao1, Guangqi Hong2, Ya Chen2
1State Key Laboratory for Turbulence and Complex Systems & Center for Applied Physics and Technology, College of Engineering , Peking University , Beijing 100871 , China.
ACS Applied Materials & Interfaces
|December 19, 2019
Summary
Researchers developed customizable kirigami electrodes for flexible lithium-ion batteries (LIBs). These electrodes maintain robust performance after extensive stretching, enabling durable flexible electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Mechanical Engineering
Background:
- Flexible and wearable electronics require advanced power sources like customized deformable lithium-ion batteries (LIBs).
- Fabricating deformable electrodes with both mechanical resilience and stable electrochemical function remains a significant challenge.
Purpose of the Study:
- To develop a method for creating customized, free-standing kirigami electrodes for deformable LIBs.
- To evaluate the mechanical robustness and electrochemical performance of these electrodes under stretching.
Main Methods:
- Utilized an evolutionary printing method with universal viscous electrode inks and a polydimethylsiloxane template.
- Incorporated lithium iron phosphate or lithium titanium oxide nanoparticles within a carbon nanotubes/poly(vinylidene fluoride) scaffold.
- Performed finite element analysis and experimental tests to assess strain and electrochemical stability.
Main Results:
- Fabricated kirigami electrodes demonstrated superior mechanical robustness, enduring over 500 stretch-release cycles.
- Electrodes exhibited ultralow strain (<3%) even at 100% stretch ratio.
- Full-cell LIBs with stretched electrodes maintained an average discharge capacity of 94.5 mA h g⁻¹ after 100 cycles.
Conclusions:
- The developed kirigami electrodes offer excellent mechanical stability and electrochemical performance for deformable LIBs.
- The simple printing method and accessible materials present a promising approach for flexible energy storage devices.
