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Silicon Nanowire Array Weaved by Carbon Chains for Stretchable Lithium-Ion Battery Anode
Pengfei Su1, Ziqi Zhang2, Linshan Luo1
1Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China.
Small (Weinheim an Der Bergstrasse, Germany)
|December 15, 2023
Summary
Researchers developed flexible silicon anode materials for batteries using silicon nanowires and carbon chains. This innovation enhances structural integrity and electrical connectivity during bending, promising advanced flexible energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Silicon anodes are promising for high-capacity batteries but suffer from structural degradation during flexible device operation.
- Maintaining structural integrity and electrical connectivity of silicon anodes under mechanical stress (bending, torsion) is a key challenge for flexible batteries.
Purpose of the Study:
- To develop a novel flexible silicon anode structure for high-performance, durable energy storage devices.
- To address the limitations of silicon anodes in flexible battery applications.
Main Methods:
- Fabrication of 1D silicon nanowire arrays integrated with flexible carbon chains (carbon nanofibers and carbon nanotubes).
- Characterization of the structural and electrochemical properties of the developed anode material.
- Testing electrochemical performance under dynamic bending conditions.
Main Results:
- Achieved a high initial specific capacity of 2856 mAh g-1.
- Maintained 60% capacity retention (1602 mAh g-1) after 1000 cycles.
- Demonstrated excellent cycling stability with less than 1% capacity attenuation after 100 bending cycles, even with high Si loading (6.92 mg cm-2).
Conclusions:
- The proposed silicon nanowire array combined with flexible carbon chains offers a robust and integrated configuration for flexible anodes.
- This novel approach significantly enhances the electrochemical performance and durability of flexible silicon anodes, paving the way for high-loading flexible energy-storage devices.
