Kim Young-Sung, Jeoung Tae-Hoon, Nam Sung-Pill, Lee Seung-Hwan, Kim Jea-Chul, Lee Sung-Gap
J Nanosci Nanotechnol. 2015 Mar;15(3):2436-40. doi: 10.1166/jnn.2015.10261.
LiFePO4/C composite powder as cathode material and graphite powder as anode material for Li-ion batteries were synthesized by using the sol-gel method. An electrochemical improvement of LiFePO4 materials has been achieved by adding polyvinyl alcohol as a carbon source into as-prepared materials. The samples were characterized by elemental analysis (EA), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-EM). The chemical composition of LiFePO4/C powders was in a good agreement with that of the starting solution. The capacity loss after 500 cycles of LiFePO4/C cell is 11.1% in room temperature. These superior electrochemical properties show that LiFePO4/C composite materials are promising candidates as cathode materials.
采用溶胶-凝胶法合成了锂离子电池用LiFePO₄/C复合粉末作为正极材料和石墨粉末作为负极材料。通过在制备好的材料中添加聚乙烯醇作为碳源，实现了LiFePO₄材料的电化学性能提升。采用元素分析（EA）、X射线衍射（XRD）和场发射扫描电子显微镜（FE-EM）对样品进行了表征。LiFePO₄/C粉末的化学成分与起始溶液的化学成分吻合良好。LiFePO₄/C电池在室温下500次循环后的容量损失为11.1%。这些优异的电化学性能表明LiFePO₄/C复合材料是很有前景的正极材料候选者。
