Comparative Analysis the Performance of Single and Poly-Crystal LiNi0.8Co0.1Mn0.1O2
[Purposes]In order to insight into the characteristic of Ni-rich ternary Li-ion batteries,two different crystalline characteristics of LiNi0.8Co0.1Mn0.1O2(NCM811)were researched and analyzed in this article.[Methods]Single and poly-crystalline cathode materials of NCM811(SC-811 and PC-811)were prepared,by mixing different precursors with LiOH·H2O calcinated at high temperature.[Findings]The results showed that the initial discharge specific capacity of PC-811 is up to 204.5 mAh/g at 0.5 C,which is higher than that of SC-811 with a value of 189.4 mAh/g.The specific capacity of PC-811 is higher than that of SC-811 at low rate,while the specific capacity of SC-811 is higher than that of PC-811 at high rate.Moreover,the capacity retention of SC-811 is higher than that of PC-811 at low tem-perature,indicating that SC-811 has a better low-temperature tolerance.[Conclusions]It was con-cluded that SC-811 has the advantage of stable crystal structure,excellent cycle performance and low-temperature performance.In the meanwhile,PC-811 has a higher specific capacity and energy density.
NETL
NSTL
万方数据
