Preparation of disodium terephthalate/multi-walled carbon nanotube composite as an anode material for sodium-ion batteries: Performance and mechanism

Abstract

Compared with the scarce resources of lithium-ion batteries (LIBs), sodium-ion batteries have been attracting research attentions as an ideal carrier for large-scale energy storage systems due to their abundant raw material resources. Organic materials are gaining importance as SIB anodes due to their advantages of simple preparation method, recyclability, and multi-electron reactions. In this work, disodium terephthalate/multi-walled carbon nanotube (Na2TP/MWCNT) organic composite was prepared as SIB anode material by an anti-solvent method. Experimental results indicated that the optimum sodium storage can be achieved with 10 wt% MWCNT dosage, where reversible capacities reached 229.9 and 93.2 mA h/g at current densities 0.1 and 2C, respectively. The capacity remained 124.9 mA h/g after 50 cycles at 1C current density, which suggested that the composite could act as a candidate for sodium ion battery anodes.