Surface modification of spherical LiNi1/3Co1/3Mn1/3O2 with Al2O3 using heterogeneous nucleation process

摘要：

To improve the cycle stability at high voltage and high charge/discharge rate,spherical LiNi1/3Co1/3Mn1/3O2 was coated with Al2O3 by using heterogeneous nucleation process,and the physical and electrochemical properties were studied.The SEM images show that there is a uniform coating on the modified spherical LiNi1/3Co1/3Mn1/3O2.The electrochemical tests indicate that the properties of LiNi1/3Co1/3Mn1/3O2 coated with 0.5％ aluminum oxide are the best.The initial capacities are 150 and 173 mA·h/g at the rate of 1C in the voltage range of 2.74.3 V and 2.74.6 V,respectively,and the discharge capacities maintain about 99％ and 85％ after 30 cycles,respectively.While those of the bare LiNi1/3Co1/3Mn1/3O2 are only 90％ and 75％,respectively.The CV tests of LiNi1/3Co1/3Mn1/3O2 show that Al2O3-coating can restrain the oxide-reduction peak currents fading during the charge/discharge course.

关键词： Li-ion battery LiNi1/3Co1/3Mn1/3O2 heterogeneous nucleation Al2O3-coated

作者: YANG Zhi LI Xin-hai WANG Zhi-xing ZHU Yong-jun

作者单位: School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）