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Flexible All-Solid-State Li-Ion Battery Manufacturable in Ambient Atmosphere
Shicheng Yu1, Qi Xu1,2, Chih-Long Tsai1
1Institut für Energie- und Klimaforschung (IEK-9: Grundlagen der Elektrochemie), Forschungszentrum Jülich, D-52425 Jülich, Germany.
ACS Applied Materials & Interfaces
|July 21, 2020
Summary
Researchers developed a flexible all-solid-state battery using carbon nanotube enhanced phosphate electrodes and a solid polymer electrolyte. This safe, robust, and inexpensive energy storage system offers high flexibility for wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Wearable electronics require safe, flexible, and inexpensive energy storage solutions.
- Existing batteries often lack the necessary mechanical stability and safety for integrated applications.
Purpose of the Study:
- To design and explore a flexible all-solid-state battery with high electrochemical performance and mechanical stability.
- To utilize low-toxicity, manufacturable components for ambient atmosphere assembly.
Main Methods:
- Fabrication of carbon nanotube (CNT) enhanced phosphate electrodes (LiTi2(PO4)3 and Li3V2(PO4)3).
- Development of a highly conductive solid polymer electrolyte (polyphosphazene/PVDF-HFP/LiBOB).
- Novel electrode design embedding active particles in CNT structures without binders or metallic current collectors.
Main Results:
- The flexible all-solid-state battery demonstrated competitive electrochemical performance and mechanical stability.
- Electrodes showed outstanding performance in half-cells.
- The battery delivered over 50% of its theoretical capacity at 1C and 30 °C, with >75% capacity retention after 200 cycles.
- Reduced capacity fading observed at 50 °C.
Conclusions:
- A flexible, safe, and robust all-solid-state battery was successfully realized through facile manufacturing.
- The novel electrode design and component selection enable high flexibility and stability for wearable devices.
- The developed battery concept and fabrication method show promising practical applications.
