Ionic Liquid Assisted Electrospinning of Porous LiFe<sub>0.4</sub>Mn<sub>0.6</sub>PO<sub>4</sub>/CNFs as Free‐Standing Cathodes with a Pseudocapacitive Contribution for High‐Performance Lithium‐Ion Batteries
Jing Yang, Rou Tan, Di Li, Jianmin Ma, Xiaochuan Duan
Abstract
Abstract In pursuit of high‐performance cathode materials for lithium‐ion batteries with high energy and power densities, porous LiFe 0.4 Mn 0.6 PO 4 /CNF free‐standing electrodes have been successfully prepared through a facile ionic liquid (IL) assisted electrospinning method. Owing to the hierarchical porosity and N‐doped carbon layer derived from the ionic liquid, the resulting electrodes exhibited superior electrochemical performances with an improvement of conductivity and pseudocapacitive contribution, delivering a discharge capability of 162.7, 133.5, 114.5, and 102.6 mAh g −1 at the current rates of 0.1, 1, 5, and 10 C, respectively. It is highly expected that this facile IL‐assisted electrospinning method will lead to further developments for other phosphate‐based free‐standing electrodes, which offers a new route in designing polyanionic cathodes for high‐performance Li‐ion batteries.