新型多孔碳材料的制备和性能

Preparation and Property of a Hierarchical Porous Carbon Material

以聚对苯二甲酸乙二酯(Polyethylene terephthalate,PET)无纺布和嵌段聚合物Pluronic F127作为模板,以酚醛树脂作为碳前驱体,用双模板法制备了具有大孔和介孔双重复合结构的碳材料。结果表明,PET的分解产生了尺寸为10~15μm的大孔,而F127的分解产生了尺寸为4~6 nm的介孔。调节碳化过程的反应条件,可使多孔碳材料的电阻率由1.63×10~4Ω·m降低至3.13×10^(-3)Ω·m。不使用导电添加剂或黏合剂,用该多孔碳材料作为电极材料的锂离子电池,其容量十分稳定。

Porous carbon materials were fabricated by a dual-templating method, using non-woven polyethylene terephthalate（PET） fabrics as the hard template and Pluronic F127 as the soft template,with soluble phenolic resol as the carbon precursor. There exists meso pores of 4-6 nm resulted from decomposition of F127 and macro pores of 10-15 μm resulted from decomposition of PET fabric in the prepared hierarchical porous materials. The conductivity can be reduced from 1.63×10^4Ω·m to 3.13×10^-3Ω·m by properly adjusting the carbonization process parameter. This porous carbon sheet can be directly used as an electrode for Li-ion battery without any conductive additive or binder, and has very stable capacity.