Nanowire of WP as a High-Performance Anode Material for Sodium-Ion Batteries

Graphical Nanowire anode material : WP nanowires on carbon cloth (WP/CC) act as a high-performance anode material for sodium-ion batteries. The WP/CC shows a superior sodium storage capability (502 mA h g −1 at 0.1 A g −1 , see figure) compared with its powder (80 mA h g −1 at 0.1 A g −1 ). Moreover, this anode has a long lifespan at 2 A g −1 with excellent capacity retention of 99 % after 1000 cycles. The design and development of electrode materials with high specific capacity and long cycling life for sodium-ion batteries (SIBs) is still a critical challenge. In this communication, we report the development of tungsten phosphide (WP) nanowire on carbon cloth (WP/CC) as an anode for SIBs. The WP/CC exhibits superior sodium storage capability with 502 mA h g −1 at 0.1 A g −1 . Moreover, this anode is capable of delivering a long lifespan at 2 A g −1 with an excellent capacity retention of 99 % after 1000 cycles.