Electrospun Li₃V₂(PO₄)₃ nanocubes/carbon nanofibers as free-standing cathodes for high-performance lithium-ion batteries

Abstract

A novel free-standing architecture with Li3V2(PO4)3 nanocubes embedded in N-doped carbon nanofibers has been successfully prepared through a facile ionic liquid-assisted electrospinning method, which exhibits an outstanding electrochemical performance including high specific capacity, stable cycling performance and superior rate capability.

Ionic Liquid Assisted Electrospinning of Porous LiFe0.4Mn0.6PO4/CNFs as Free‐Standing Cathodes with a Pseudocapacitive Contribution for High‐Performance Lithium‐Ion Batteries

“…Unfortunately, the poor solubility of PAN limits its complete coverage of the active material, resulting in the inability to form a continuous carbon coating on the surface of active material. To address this issue, ionic liquid (IL) was introduced as multi‐function precursor for the electrospinning of lithium vanadium phosphate, and successfully obtained the self‐supporting electrodes . More importantly, benefiting from its superior solubility, IL with fluidic property can penetrate and cover onto inherent active material easily, thus favouring the formation of a continuous and thin carbon layer on the active material surface .…”

Na3V2(PO4)3‐Supported Electrospun Carbon Nanofiber Nonwoven Fabric as Self‐Standing Na‐Ion Cell Cathode

“…Carbon nanofibers (CNF) have been widely used in preparation of electrodes, mainly as conductive fillers, anodic active materials and conductive supports for cathodic active materials due to their high electronic conductivity and mechanical properties. In fact, one dimensional (1D) nanofibers possess a unique structure that provides an enhanced surface‐to‐volume ratio, short transport length for ionic transport and efficient electron transport along the longitudinal direction.…”

“…The high electrical conductivity (up to 1000 S cm −1 ) and the porous interconnected structure of electrospun non‐woven CNF are features that well match the requirements of an ideal battery electrode, offering low internal resistance and allowing electrolyte diffusion for the complete usage of the active material. Active materials suffering from low electronic conductivity and limited cycle life when used in slurry‐based electrodes are reported to achieve better performances in terms of higher C‐rate, enhanced long‐term cycling ability and higher Coulombic efficiency if combined with proper conductive supports . Carbon‐supported Na 3 V 2 (PO 4 ) 3 /C has been the center of much research and interesting synthesis procedures and electrochemical results have been recently published .…”

“…Stabilization and carbonization of the CNF mat are investigated in detail to prove the reproducibility of the method and find useful correlation between the process parameters and the CNF mat morphology. The cathodic active material Na 3 V 2 (PO 4 ) 3 (NVP), was chosen due to the remarkable increase in cycle life performance when used in a conductive porous support . NVP is directly loaded into the CNF support by dip coating and through vacuum filtration system, two low‐cost and readily scalable techniques, which leads to a self‐supported cathode ready to use without, in principle, any current collector support and/or the addition of any conductivity enhancer, thus resulting in higher energy density at cell level.…”

Flexible Conductive Anodes Based on 3D Hierarchical Sn/NS-CNFs@rGO Network for Sodium-Ion Batteries

“…The carbonaceous materials also improve the conductivity of electrode and provide additional sodium storage [23]. In recent years, several effective attempts have been made to integrate nano-Sn with one-dimensional (1D) carbon nanofibers (CNFs), attractive for their uniform structure, oriented transport channels for electron and ion, and strong tolerance to mechanical stress [24][25][26]. 1D CNFs have demonstrated ideal construction units to build multi-functional and multi-dimensional electrodes for advanced energy storage devices [27].…”