以葡萄糖为碳源、乙酰胺为氮源、氢氧化钾(KOH)为活化剂,通过水热碳化及烧结处理,制备了氮掺杂多孔碳材料,将其与硫进行复合得到多孔碳/硫复合正极材料,考察了不同质量活化剂对多孔碳材料比表面积、孔容孔径及多孔碳/硫复合正极材料电化学性能的影响。结果表明:多孔碳前驱体与活化剂质量比为1∶4时制备的多孔碳材料具有最大的比表面积和孔隙率,且该材料与硫复合得到的多孔碳/硫复合正极材料具有最优的电化学性能、较高的放电比容量和良好的循环性能。
Small molecule glucose as carbon source,acetamide as nitrogen source and different amounts of KOH as activators were used to prepare nitrogen-doped mesoporous carbon materials.Then they were impregnated with sulfur to obtain carbon/sulfur composite material.The effects of the amount of activator on the specific surface area,pore volume and size of the materials and electrochemical properties of C/S anodes were investigated.The results showed that when the mass ratio of precursor and KOH was 1∶4,the obtained product possessed the highest specific surface area and pore volume.Meanwhile,the corresponding C/S anode exhibited high specific discharge capacity and good cycling performance.
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基金资助
国家国际科技合作专项资助项目(2015DFR50350);国家自然科学基金资助项目(51702256);陕西省科技厅创新人才推进计划-科技创新团队项目(2019TD-019);陕西省科技计划资助项目(2017GY-160);陕西省自然科学基础研究计划资助项目(2017JQ5055);电动汽车智能充放电与电网互动协调关键技术研究(109-441218001)
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