i-LAB, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China.
Sci Rep. 2013;3:1910. doi: 10.1038/srep01910.
We report the synthesis of ultrafine S nanoparticles with diameter 10 ~ 20 nm via a membrane-assisted precipitation technique. The S nanoparticles were then coated with conducting poly (3,4-ethylenedioxythiophene) (PEDOT) to form S/PEDOT core/shell nanoparticles. The ultrasmall size of S nanoparticles facilitates the electrical conduction and improves sulfur utilization. The encapsulation of conducting PEDOT shell restricts the polysulfides diffusion, alleviates self-discharging and the shuttle effect, and thus enhances the cycling stability. The resulting S/PEDOT core/shell nanoparticles show initial discharge capacity of 1117 mAh g(-1) and a stable capacity of 930 mAh g(-1) after 50 cycles.
我们报告了一种通过膜辅助沉淀技术合成直径为 10~20nm 的超细 S 纳米粒子的方法。然后，将 S 纳米粒子涂覆在导电聚（3,4-亚乙基二氧噻吩）（PEDOT）上，形成 S/PEDOT 核/壳纳米粒子。S 纳米粒子的超小尺寸有利于电传导，并提高了硫的利用率。导电 PEDOT 壳的包裹限制了多硫化物的扩散，缓解了自放电和穿梭效应，从而提高了循环稳定性。所得到的 S/PEDOT 核/壳纳米粒子在 50 次循环后具有 1117mAhg(-1)的初始放电容量和 930mAhg(-1)的稳定容量。
