University of Science and Technology of China

03/10/2017 | News release | Distributed by Public on 03/20/2017 18:58

Scientists Realize Sodium-ion Battery with Long Life Cycle and High Rate Capability

Red phosphorus (P) is considered as a promising anode material for sodium-ion batteries, which can deliver a high theoretical sodium-storage capacity of 2595 mAh /g. Prof. YU Yan's group had applied highly order mesoporous carbon to load red P and realized improvement of lithium & sodium storage performance (Nano Lett.). Based on the previous work, researchers devoted to the improvement of sodium storage performance of phosphorus-based materials.

They demonstrated a rational strategy by confining nano-sized amorphous red P into metal-organic framework derived nitrogen-doped microporous carbon matrix, which highly improves the sodium storage performance of phosphorus-based anode materials. When used as anode for sodium-on batteries, the obtained material displays a high reversible specific capacity of ~600 mAh/g at 0.15 A/g and ultralong working life at a high current density (~450 mAh/g at 1 A/g after 1000 cycles).

The prepared red P-based anode material shows great promise for practical application in the next-generation sodium-ion batteries. This design could be extended to prepare other energy storage materials that need efficient ionic and electronic transport.

This work is supported by the National Natural Science Foundation of China, the 'Recruitment Program of Global Experts', the Fundamental Research Funds for the Central Universities, and the Collaborative Innovation Center of Suzhou Nano Science and Technology.