Sim Seoung-Ju, Lee Seung-Hwan, Jin Bong-Soo, Kim Hyun-Soo
Next-Generation Battery Research Center, Korea Electrotechnology Research Institute, Changwon, 641-120, South Korea.
Sci Rep. 2019 Jun 20;9(1):8952. doi: 10.1038/s41598-019-45556-7.
Ni-rich layered LiNiCoMnO cathode material was modified by doping with vanadium to enhance the electrochemical performances. The XRD, FESEM and XPS analyses were indicated that the vanadium is successfully doped in the crystal lattice of LiNiCoMnO with high crystallinity. 0.05 mol% vanadium doped LiNiCoMnO exhibits superior initial discharge capacity of 204.4 mAh g, cycling retention of 88.1% after 80 cycles and rate capability of 86.2% at 2 C compared to those of pristine sample. It can be inferred that the vanadium doping can stabilize the crystal structure and improve the lithium-ion kinetics of the layered cathode materials.
通过掺杂钒对富镍层状LiNiCoMnO正极材料进行改性，以提高其电化学性能。XRD、FESEM和XPS分析表明，钒成功地掺杂到具有高结晶度的LiNiCoMnO晶格中。与原始样品相比，0.05 mol%钒掺杂的LiNiCoMnO表现出优异的初始放电容量，为204.4 mAh g，80次循环后的循环保持率为88.1%，在2 C下的倍率性能为86.2%。可以推断，钒掺杂可以稳定晶体结构并改善层状正极材料的锂离子动力学。
