首页|(162848)Influence of the LiFePO_4/C coating on the electrochemical performance of Nickel-rich cathode for lithium-ion batteries
(162848)Influence of the LiFePO_4/C coating on the electrochemical performance of Nickel-rich cathode for lithium-ion batteries
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
LiFePO_4/C (LFP/C)-coated LiNi_(0.8)Co_(0.1)Mn_(0.1)(NCM811) was prepared by a simple ball milling method (400 rpm for 4 h), and the influence of different coating amounts of LFP/C on the electrochemical performance of NCM811 was studied in detail. When the LFP/C coating amount was 1 wt%, the material maintained good electrochemical cycling stability and rate performance. The capacity retention of NCM811 @ 1 LFP/C after 300 cycles was 61.6% at 25 °C, which was significantly better than the corresponding value of 48.63% of NCM811. Simultaneously, the high temperature (55 °C) and high pressure (2.8-4.5 V) cycling stability performance of NCM811 @ 1 LFP/C was also better than for uncoated materials. The EIS results showed that the 1 LFP/C modification effectively reduced R_(SEI) (from 46.37 to 32.13 Ω) and Rct (from 155.9 to 113.5 Ω), which was beneficial for the interface charge transfer of electrons and Li~+ ions, consistent with the CV analysis. The XRD, XPS, and FESEM results indicated that the coating layer suppressed the changes in the NCM811 particle macro-volume and reduced the side reactions, improving the electrochemical performance of Nickel-rich layered materials.
Nickel-rich metal oxideCoating layerLithium-ion batteriesElectrochemical performanceLithium iron phosphate/ carbon
Yan Zhuang、Wei Zhang、Yingqing Bao
展开 >
School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou 215006, China
BTR New Material Group Co., Ltd., Shenzhen 518000, China
NSTL
Elsevier
