Research on self-supporting flexible cathode materials with high LFP loading based on PAN in situ inorganic reaction

Abstract

High loading flexible electrode material is a key component of flexible batteries. This article prepares a flexible electrode by using electrospinning technology that achieves high conductivity and self-supporting without adhesive and current collector. This structural advantage is attributed to the high compatibility and fibrosis of PAN (polyacrylonitrile) and LFP/CNF, which is transformed in situ by precursor conversion method into a flexible self-supporting composite electrode with continuous carbon fiber/CNF as the conductive phase and LFP(LiFePO₄) as the lithium storage phase. These flexible materials achieving a specific capacity of 110.5 mAh/g at 0.1C, 92 mAh/g at 0.5C, and 58 mAh/g at 3C, further demonstrated reversible charge and discharge cycles after mechanical bending. These findings highlight the potential of LFP/CNF electrodes for flexible and high-performance energy storage applications.