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Microwave-Assisted Synthesis of High-Voltage Nanostructured LiMn1.5Ni0.5O4 Spinel: Tuning the Mn3+ Content and Electrochemical Performance

Author:
Jafta, Charl J., Mathe, Mkhulu K., Manyala, Ncholu, Roos, Wiets D., Ozoemena, Kenneth I.
Source:
ACS Applied Materials & Interfaces 2013 v.5 no.15 pp. 7592-7598
ISSN:
1944-8252
Subject:
cathodes, electrochemistry, lithium, lithium batteries, manganese, microwave radiation, microwave treatment
Abstract:
The LiMn₁.₅Ni₀.₅O₄ spinel is an important lithium ion battery cathode material that has continued to receive major research attention because of its high operating voltage (∼4.8 V). This study interrogates the impact of microwave irradiation on the Mn³⁺ concentration and electrochemistry of the LiMn₁.₅Ni₀.₅O₄ spinel. It is shown that microwave is capable of tuning the Mn³⁺ content of the spinel for enhanced electrochemical performance (high capacity, high capacity retention, excellent rate capability, and fast Li⁺ insertion/extraction kinetics). This finding promises to revolutionize the application of microwave irradiation for improved performance of the LiMn₁.₅Ni₀.₅O₄ spinel, especially in high rate applications.
Agid:
5274825