A new strategy to diminish the 4 V voltage plateau of LiNi{sub 0.5}Mn{sub 1.5}O{sub 4}

Journal Article · Thu Nov 14 23:00:00 EST 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.07.002· OSTI ID:22285233

Liu, Guoqiang; Zhang, Lingxi; Sun, Lu; Wang, Lun

Graphical abstract: The annealed sample LiNi{sub 0.5}Mn{sub 1.5}O{sub 4} cannot eliminate the 4-V voltage plateau completely. The Mg-doped compound LiNi{sub 0.5}Mn{sub 1.45}Mg{sub 0.05}O{sub 4} can effectively diminish the 4 V voltage plateau during charge and discharge process. - Highlights: • Mg-doped compound LiNi{sub 0.5}Mn{sub 1.45}Mg{sub 0.05}O{sub 4} was prepared. • The 4 V voltage plateau in the charge–discharge curves of LiNi{sub 0.5}Mn{sub 1.45}Mg{sub 0.05}O{sub 4} was diminished. • Compound LiNi{sub 0.5}Mn{sub 1.45}Mg{sub 0.05}O{sub 4} exhibited good electrochemical properties. - Abstract: As for spinel LiNi{sub 0.5}Mn{sub 1.5}O{sub 4}, there is 4 V voltage plateau in the charge–discharge profiles. This voltage plateau can be reduced by an annealing process, however it is hard to avoid it completely. In this study, a new strategy of partial substitution for Mn by Mg is applied. There is no 4 V voltage plateau in the charge–discharge profiles of Mg-doped compound LiNi{sub 0.5}Mn{sub 1.45}Mg{sub 0.05}O{sub 4}. This compound exhibits good electrochemical properties which can be used as cathode material of lithium ion batteries. At 1 C rate, it can deliver a capacity of around 129 mAh g{sup −1} and remain good cycle performance.

• OSTI ID: 22285233
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 48; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
DOPED MATERIALS
ELECTRIC BATTERIES
ELECTROCHEMISTRY
INORGANIC COMPOUNDS
LITHIUM IONS
SYNTHESIS
X-RAY DIFFRACTION