摘要
以Fe^(3+)为铁源,乙炔黑为碳源,采用溶胶-凝胶法合成出了多孔的LiFePO_4/C,并用XRD、SEM、CV及恒流充放电测试对材料进行了研究和表征.该材料以1C倍率充放电时,首次放电容量达139.5mAh/g,循环50周后,仍有132.0mAh/g的容量.这是由于合成的多孔材料可以与电解液有更充分的接触,从而提高了材料的利用率.
Olivine typed mesoporous LiFePO4/C was synthesized by a sol-gel method in this paper using Fe^3＋ as iron source and acetylene black as carbon source. Sample was tested using XRD, SEM, CV and charge-discharge tests. The initial discharge capacity reached 139.5 mAh/g under 1 C rate and remained 132. 0 mAh/g after 50 cycles. The meso pores were formed within LiFePO4/C particles which can be filled with electrolyte and make full use of the material.
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期7-10,共4页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
天津市自然科学基金(06YFJMJC04900)
国家自然科学基金(20801059)
