Zhu Ji-Ping, Zu Wei, Zhao Jun-Jie, Yang Guang, Xu Quan-Bao
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, PR China.
J Nanosci Nanotechnol. 2012 Mar;12(3):2539-42. doi: 10.1166/jnn.2012.6136.
Series of anode materials (Ag modified Li4TiO512) were acquired through two types of solid state calcination (doping and coating). The samples were characterized by XRD and their grain sizes were examined by laser particle-size analyzer and the morphology of them were obtained by SEM. At 0.5 C discharging rate, the first specific discharge capacities of Ag doped Li4Ti5O12 (the amounts of dopants were 0.1, 0.25, 0.5 and 1 wt% of the weight of Li4Ti5O12) were found to be 136.8, 135.5, 140.4 and 155.6 mAh/g respectively. However, the corresponding values of coated samples (the amounts of coating were of the weight of Li4Ti5O12) were respectively at the same condition. Obviously, the Ag coated samples possessed the higher capacities. The first specific discharge capacities of the Ag coated samples (the amounts of coating were 3.0, 5.0, 8.0 and 10 wt% of the weight of Li4Ti5O12) were 170.74, 175.31, 191.61 and 192.06 mAh/g.
通过两种固态煅烧方式（掺杂和包覆）制备了一系列阳极材料（Ag改性Li4TiO512）。采用X射线衍射仪对样品进行表征，用激光粒度分析仪检测其晶粒尺寸，并用扫描电子显微镜观察其形貌。在0.5 C放电速率下，发现Ag掺杂Li4Ti5O12（掺杂量分别为Li4Ti5O12重量的0.1%、0.25%、0.5%和1%）的首次比放电容量分别为136.8、135.5、140.4和155.6 mAh/g。然而，在相同条件下，包覆样品（包覆量为Li4Ti5O12重量）的相应值分别为。显然，Ag包覆样品具有更高的容量。Ag包覆样品（包覆量分别为Li4Ti5O12重量的3.0%、5.0%、8.0%和10%）的首次比放电容量分别为170.74、175.31、191.61和192.06 mAh/g。
