Effect of carbon dimensions on the electrochemical performance of SnSe2 anode for Na-ion batteries

The emerging Na-ion batteries have attracted the world's attention due to abundant resources and low cost. SnSe2 is a promising anode material with high capacity. To overcome the poor electronic conductivity and large volume expansion, different dimensional carbon, including Super P, carbon nanotube and graphene, are compositing with SnSe2 via ball milling. It is proved that 2 dimensional (2D) graphene could better improve the capacity, cycle stability, and reduce the charge transfer resistance. The conductive network of graphene accelerated both long-range and short-range charge transfer, which is better than that of others. Thus SnSe2/RGO sample delivers the highest specific capacity of 469 mAh g (1) at 50 mA g (1) and 145 mAh g (1) at 5 A g (1). This work reveals that the dimension of carbon is an important factor in materials design and performance improvement. (c) 2020 Elsevier B.V. All rights reserved.

Automated summary

Na-ion batteries have gained attention for their abundant resources and low cost. By compositing SnSe2 with different dimensional carbon materials via ball milling, the performance of the batteries can be improved. Graphene plays a vital role in enhancing charge transfer, capacity, and cycle stability in the composites.