颗粒粒径与硫酸处理对竹碳电极电化学性能的影响

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

将竹碳进行球磨和硫酸处理,比较颗粒粒径和硫酸处理时间对竹碳电极电化学性能的影响.结果表明,平均粒径5μm的竹碳电极具有较好的充放电效率,而硫酸处理可有效提高材料的放电容量.硫酸处理18 h的竹碳电极首次放电比容量可达328.2 mAh·g-1,50次循环后其比容量仍保持302.3 mAh·g-1,显示出优异的循环寿命.

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 re-sult displays that the bamboo charcoal with mean particle size about 5 μm has the best first coulombic efficien-cy. Sulfuric acid treatment could raise the discharge capacity of bamboo charcoal, and the first discharge ca-pacity of 328.2 mAh·g^-1 was obtained with the bamboo charcoal treated by sulfuric acid for 18 h. Further-more, the capacity of 302.3 mAh·g^-1 could be maintained for 50 cycles, showing good cyclability.