Journal
CHEMSUSCHEM
Volume 9, Issue 14, Pages 1843-1849Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600365
Keywords
electrochemistry; energy transfer; lithium-ion battery; manganese; synthesis design
Funding
- German Federal Ministry of Education and Research (BMBF) [03X4636A]
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We report Co-free, Li-rich Li1+xNi0.5Mn1.5O4 (0<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 Li1.5Ni0.5Mn1.5O4 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+xNi0.5Mn1.5O4 (0<1), make practical applications of high-energy density Li-ion batteries possible.
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