CoF2 nanoparticles grown on carbon fiber cloth as conversion reaction cathode for lithium-ion batteries

Abstract Lithium-ion batteries are a typical representative of energy storage system with high storage capacity and good cycle stability. However, the low specific capacity can not meet the storage capacity requirements for new generation of electronic products, which have limited their practical application. Herein, CoF 2 nanoparticles loaded on carbon fiber cloth (CoF 2 @CFC) as a flexible composite material prepared without binder or conductive agent is introduced as a cathode for lithium-ion batteries, which exhibit a high specific capacity of 330 mA h g −1  at 100 mA g −1 and have a stable specific capacity of 100 mA h g −1  at 1 A g −1 even after 1000 cycles. In addition, the flexibility of CoF 2 @CFC creates an application potential in the field of flexible electronic devices and wearable electronics.