CAJ | 학술논문

针对锂硫电池研究中硫单质电导率低和多硫化锂易溶解于电解液的问题，制备了一种核壳结构的碳纳米管（CNT＠ C）作为硫载体，碳纳米管外壳包覆的碳层中的微孔能吸附多硫化锂，从而抑制多硫离子扩散．X射线衍射（XRD），透射电子显微镜（TEM）和扫描电子显微镜（SEM）表征结果表明硫均匀负载在核壳结构碳纳米管上．电化学测试结果表明这种核壳结构的复合材料有较高容量和良好的循环性能．
침대리류전지연구중류단질전도솔저화다류화리역용해우전해액적문제，제비료일충핵각결구적탄납미관（CNT＠ C）작위류재체，탄납미관외각포복적탄층중적미공능흡부다류화리，종이억제다류리자확산．X사선연사（XRD），투사전자현미경（TEM）화소묘전자현미경（SEM）표정결과표명류균균부재재핵각결구탄납미관상．전화학측시결과표명저충핵각결구적복합재료유교고용량화량호적순배성능．
The development of lithium‐sulfur battery has been hindered by the poor conductivity of sulfur and the dissolution of lithium polysulfides in the electrolyte .In this paper ,the core‐shell structured nanotube (CNT@ C) was designed to overcome these shortcomings .The as‐prepared CN T@ C can improve the conductivity of sulfur and restrain the diffusion of polysul‐fide ions by microporous carbon coating as well .X‐ray diffraction (XRD) ,transmission elec‐tron microscopy (TEM ) and scanning electron microscopy (SEM ) were used to measure the nanocomposites .The results indicated that elemental sulfur was uniformly distributed across the core‐shell carbon nanotube .The electrochemical experiment showed that the core‐shell composite has high capacity and good cycle performance .