Electrochemical properties of LiCoO_2anocarbon composites fabricated from organic liquids

摘要

We fabricated LiCoO_2/carbon composites by forming helical carbon nanomaterials (HCNs) from organic liquids as carbon sources on the surface of LiCoO_2 particles by chemical vapor deposition (CVD) and estimated their electrochemical properties as cathodes of rechargeable lithium cells. By scanning electron microscopy measurements, we observed HCNs called carbon nanotwists formed on the surface of UCoO_2 particles. X-ray diffraction measurements suggested that acetic acid supplies LiCoO_2/HCNs with less decomposition of UCOO_2 than C_2H_2 does. However, we found that the electrochemical properties of cells containing the composites were not as good as those of cells containing acetylene black (AB).