以LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2为正极的高功率锂离子蓄电池性能研究

Performance Research on High Power Lithium Ion Batteries Using LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 as Cathode Material

对以LiNi1/3Co1/3Mn1/3O2为正极的高功率锂离子蓄电池性能进行了实验研究。给出了试验的材料和内容。用扫描电镜观察三元活性材料的表面形貌,测定了LiNi1/3Co1/3Mn1/3O2的氧化还原电位和比容量,以及ITP30单体性能。结果表明:三元材料的比容量达到170mA·h/g;在高功率放电的条件下放电终压曲线微降,2 154次循环后容量保有量为96.5%;大倍率放电条件下温度上升值也相对较小。

The performance of high power lithium ion batteries using LiNi1/3 Co1/3 Mn1/3O2 as cathode material was studied in this paper. The materials and items of the test were given out. The surface morphology of the ternary active materials was observed by scanning electron microscopy. The oxidation and reduction potential and specific capacity of LiNi1/3 Co1/3 Mn1/3O2 and performance of ITP30 unit were measured. The results showed that the specific capacity of LiNi1/3Co1/3 Mnl/3 O2 was about 170 mA h/g. The end of discharge voltage was slightly decreased with high discharge rate. The capacity retention was about 96.5% after 2 154 charging and discharging cycles. The increased temperature was lower when discharged at high rate.