Abstract:
Polyanion compounds based flexible electrodes of Lithium/Sodium ion battery have shown many advantages, such as better flexibility, ductility, high working voltage, and stabilized framework structure, which attach extensive attention. Based on different types of transition metal elements in polyanion compounds, the developing process and technology idea of the electrode are reviewed from two views including electrode preparation method and energy storage performance of polyanion compounds. In terms of electrode preparation, the influence of electrospinning, solve thermal and sol-gel methods on the mechanical property of the electrode are mainly discussed. In the performance feature of energy storage, the impact on the properties of flexible batteries is assessed and analyzed from specific capacity, working voltage, rate performance to cycle life. Aiming at the requirement of high energy density and long cycle life in flexible electrode employing poly-anion type materials, the problems and developing direction of such materials, such as low energy density, optimization and matching of electrochemical performance and non-uniform evaluation criteria for the flexibility, are pointed out, and these will provide ideas for reference in the research and development of flexible electrode and battery devices with high performance in the future.
