Influences of Particle Size and Sulfuric Acid Treatment on the Electrochemical Performance of Bamboo Charcoal

The bamboo charcoal had been milled and treated by sulfuric acid.The influence of as-prepared material particle size and sulfuric acid treatment on the electrochemical performance had been studied.The result displays that the bamboo charcoal with mean particle size about 5 μm has the best first coulombic efficiency.Sulfuric acid treatment could raise the discharge capacity of bamboo charcoal,and the first discharge capacity of 328.2 mAh·g-1 was obtained with the bamboo charcoal treated by sulfuric acid for 18 h.Furthermore,the capacity of 302.3 mAh·g-1 could be maintained for 50 cycles,showing good cyclability.