Quaternary layered Cr‐doped modified NCMFe cathode material for Lithium‐Ion Batteries

• DOI: 10.1002/cctc.202301529
• Publication Date: 2024-01-20T03:48:59Z
• Authors: Ming‐Lv Zhang; Jie‐Long He; Hua‐Cheng Wu; Zhen‐Yuan Tang; Qian Luo; Jia‐Ni Wu; Jun Li
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract A series of cathode materials, Li[Ni 0.6 Co 0.12 Mn 0.2 Fe 0.08 ] 1‐x Cr x O 2 (x=0, 0.02, 0.04, 0.06), are synthesized via the co‐precipitation method. Structural characterization shows that 3+ ions successfully incorporated into material structure and evenly dispersed on surface crystal particles with other metal elements. The Cr‐doped a well‐defined hexagonal layered less cation mixing, increase in interionic interlayer distances is beneficial for transport lithium ions. Compared to pure NCMFe phase, cyclic rate performances quaternary materials have been significantly improved. Among them, 4Cr exhibits best electrochemical performance. capacity retention after 50 charge‐discharge cycles at 0.1 C was increased from 74.83 % 87.32 %. performance has also 87.6 92.69 can reduce charge transfer resistance enhance stability structure, which results outstanding cathode. CV EIS tests were conducted various doping levels, further confirming degree polarization electrode discharge reversibility, materials.