中文摘要：

LiNi_(0.85 )Co_(0.15x ) Al_xO_2 样品(x=0.025， 0.05 和 0.10 ) 被稳固的州的反应从 LiOH 中心点 H_2O 为 24 h 在 725 deg C 作好准备， Ni_2O_3， Co_2O_3 andAl (哦) 在氧下面的 _3 流动。煤同时做的分层的 LiNiO_2 被试试改进阴极表演。结果证明为 Niin LiNiO_2 的最佳数量艾尔和公司的替换毫无疑问在增加能力和骑车的行为上有某有益的效果。当在 LiNi_(0.85 )Co_(0.15x ) Al_xO_2 增加 x 时，起始的分泌物能力减少了， itscyclability 增加了。妥协高特定的能力和好 cyclability，最佳 x inLiNi_(0.85 )Co_(0.15x ) Al_xO_2 是 x=0.05。作为后果， LiNi_(0.85 )Co_(0.15x )Al_(0.05 ) O_2 让第一在 10 个周期以后解除 186.2 mAh/g 的能力和 180.1 mAh/g 的一个能力。微分能力对电压曲线显示共同做的 LiNiO_2 作为与 LiNiO_2 相比显示出阶段转变的抑制。

英文摘要：

LiNi0.85CO0.15-xAlxO2 samples （x=0.025, 0.05 and 0.10） were prepared by solid state reaction at 725℃ for 24 h from LiOH-H2O, Ni2O3, Co2O3 and Al（OH）3 under oxygen flow. Layered LiNiO2 simultaneously doped by Co-Al has been tried to improve the cathode performance. The results showed that substitution of optimum amount Al and Co for the Ni in LiNiO2 definitely had some beneficial effect on increasing the capacity and cycling behavior. When increasing x in LiNio.85CO0.15-xAlxO2, the initial discharge capacity decreased and its cyclability increased. Compromising high specific capacity and good cyclability, the optimum x in LiNi0.85Co0.15-xAlxO2 was x=0.05. As a consequence, LiNi0.85Co0.15-xAlxO2 had the first discharge capacity of 186.2 mAh/g and a capacity of 180.1 mAh/g after 10 cycles. Differential capacity vs voltage curves indicated that the co-doped LiNiO2 showed suppression of the phase transitions as compared with LiNiO2.