锂二氧化碳电池存在过电位大、循环寿命低等问题。以六水合三氯化铁为氧化剂、甲基橙为模板，采用模板法并经高温碳化制备了大孔径氮掺杂聚吡咯碳纳米管（NPPy-CNTs）。SEM和TEM分析结果表明，制备的聚吡咯碳纳米管具有较大的管径，能够为放电产物的均匀沉积提供场所。EDS分析结果表明，氮元素的掺杂能够在聚吡咯碳纳米管表面引入缺陷，增加活性位点，提高催化性能。与商业CNTs负极相比，NPPy-CNTs作为锂二氧化碳电池阴极催化剂表现出良好的放电比容量、循环性能和低过电位。

Lithium-carbon dioxide batteries have problems such as large overpotential potential and low cycle life.Large-pore nitrogen-doped polypyrrole carbon nanotubes (NPPy-CNTs) are prepared through the template method and high temperature carbonization method with ferric chloride hexahydrate as the oxidant and methyl orange as the template.SEM and TEM observations show that the prepared polypyrrole carbon nanotubes have a large diameter, which can provide a place for uniform deposition of discharge products.The results by EDS analysis show that the doping of nitrogen can produce defects on the surface of polypyrrole carbon nanotubes, increase active site, and improve the catalytic performance.Compared with commercial CNTs cathode, the prepared NPPy-CNTs as cathode catalysts for lithium carbon dioxide batteries exhibit good discharge specific capacity, cyclic properties and low overpotentials.

袁梦明(1997-),男,硕士研究生,研究方向为新能源材料与器件,yuanmengmingtp@163.com