A High-Voltage and High-Capacity Li1+x Ni0.5 Mn1.5 O4 Cathode Material: From Synthesis to Full Lithium-Ion Cells.
We report Co-free, Li-rich Li1+x Ni0.5 Mn1.5 O4 (0<x<1) compounds as high-voltage and high-capacity cathode materials for Li-ion cells. Their tailored morphology allows high density and facile processability for electrode development. In the potential range 2.4-4.9 V, the cathode material of composition Li1.5 Ni0.5 Mn1.5 O4 shows excellent performance in terms of capacity and cycling stability in half-cells. In addition, for the first time, we demonstrate the application of the high-voltage and high-capacity cathode in full Li-ion cells with graphite anodes with very high cycling stability. The electrochemical performance and low cost of the cathode material, together with the feasibility of a chemical method to obtain Li-rich Li1+x Ni0.5 Mn1.5 O4 (0<x<1), make practical applications of high-energy density Li-ion batteries possible.
Accumulator Materials Research (ECM), Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Helmholtzstraße 8, 89081, Ulm, Germany.
Marilena
0000-0001-9088-6068
M
Mancini
Accumulator Materials Research (ECM), Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Helmholtzstraße 8, 89081, Ulm, Germany. peter.axmann@zsw-bw.de.
Peter
P
Axmann
Accumulator Materials Research (ECM), Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Helmholtzstraße 8, 89081, Ulm, Germany.
Giulio
G
Gabrielli
Group of Electron Microscopy of Material Science, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.|Helmholtz Institute Ulm, Helmholtzstraße 11, 89081, Ulm, Germany.
Michael
M
Kinyanjui
Group of Electron Microscopy of Material Science, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
Ute
U
Kaiser
Accumulator Materials Research (ECM), Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Helmholtzstraße 8, 89081, Ulm, Germany.|Helmholtz Institute Ulm, Helmholtzstraße 11, 89081, Ulm, Germany.
Margret
M
Wohlfahrt-Mehrens
D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D014961:X-Ray Diffraction
D008094:Lithium
electrochemistry; energy transfer; lithium-ion battery; manganese; synthesis design