Details

Autor(en) / Beteiligte

• Chen, Yongxiang
• Li, Puliang
• Li, Yunjiao
• Su, Qianye
• Xue, Longlong
• Han, Qiang
• Cao, Guoling
• Li, Jianguo

Titel

Enhancing the high-voltage electrochemical performance of the LiNi0.5Co0.2Mn0.3O2 cathode materials via hydrothermal lithiation

Ist Teil von

• Journal of materials science, 2018-02, Vol.53 (3), p.2115-2126

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The chemical lithiated transition metal oxide precursor has been prepared via a hydrothermal process and successfully used for preparing the LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode materials by the post-heat treatment. The results indicate that the lithiated transition metal oxide precursor inherits the morphology of the Ni 0.5 Co 0.2 Mn 0.3 (OH) 2 precursor but has a typical α -NaFeO 2 -type (space group: R-3 m) layered structure with an imperfect crystallinity, and the Li is homogenously distributed in the particles. It is further confirmed that the obtained LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode material has a suppressed cation mixing resulting in an excellent electrochemical performance. It delivers the high initial capacity of 187.3 mAhg −1 at 1 C over the high cutoff voltage range of 3.0–4.6 V and the excellent capacity retention of 81.90% after 100 cycles as well as the rate capability of 152.3 mAhg −1 at 8 C, which are attributed to the low polarization, fast Li + diffusion and small charge–discharge resistance of the as-prepared material upon cycling.