中文摘要：

以椰壳为原料、氢氧化钾为活化剂,制备高比表面积（2258 m^2/g）、具有微孔结构的活性炭。采用氨水、双氧水进行改性,随后经高温封装法将改性活性炭与硫复合（硫含量为60%）,作为正极材料制备锂硫电池,研究官能团改性对锂硫电池性能的影响。氨水改性引入了大量的氨基,以200 mA/g的电流在1.7-2.8 V循环,首次放电比容量由硫正极的1058mAh/g提高至硫碳复合正极的1 333 mAh/g;双氧水改性引入了羧基基团,对锂硫电池的容量和循环性能不利。

英文摘要：

The high surface area microporous activated carbon（2258 m^2/g）was synthesized by using coconut shell as raw material and KOH as activator, then modified by ammonia and hydrogen peroxide respectively. After loading sulfur（60% ）, the S/C composite was used as cathode for lithium （ Li ） -sulfur （S） battery. The content of amidogen was increased after ammonia modification, when cycled in 1.7 -2. 8 V with the current of 200 mA/g, the initial specific discharge capacity was increased from 1 058 mAh/g of sulfur cathode to 1 333 mAh/g of sulfur carbon composite cathode. The carboxyl group brought by hydrogen peroxide treatment, made a negative influence on the capacity and cycle performance of lithium-sulfur battery.