Fluorine-Doped LiNi0.8Mn0.1Co0.1O2 Cathode for High-Performance Lithium-Ion Batteries

Energies

Sung-Beom Kim¹  Deok-Hye Park¹  Kyung-Won Park¹  Hyeona Kim¹ 

[1] Department of Chemical Engineering, Soongsil University, Seoul 06987, Korea;

关键词: fluorine;    doping;    LiNi_0.8Co_0.1Mn_0.1O₂;    cathode;    lithium-ion batteries;   

DOI  :  10.3390/en13184808

来源: DOAJ

【 摘 要 】

For advanced lithium-ion batteries, LiNi_xCo_yMn_zO₂ (x + y + z = 1) (NCM) cathode materials containing a high nickel content have been attractive because of their high capacity. However, to solve severe problems such as cation mixing, oxygen evolution, and transition metal dissolution in LiNi_0.8Co_0.1Mn_0.1O₂ cathodes, in this study, F-doped LiNi_0.8Co_0.1Mn_0.1O₂ (NCMF) was synthesized by solid-state reaction of a NCM and ammonium fluoride, followed by heating process. From X-ray diffraction analysis and X-ray photoelectron spectroscopy, the oxygen in NCM can be replaced by F^- ions to produce the F-doped NCM structure. The substitution of oxygen with F^- ions may produce relatively strong bonds between the transition metal and F and increase the c lattice parameter of the structure. The NCMF cathode exhibits better electrochemical performance and stability in half- and full-cell tests compared to the NCM cathode.

【 授权许可】

Unknown