Facile fabrication of LiMn2O4 microspheres from multi-shell MnO2 for high-performance lithium-ion batteries

• MnO2 with a multi-shell structure is fabricated in a simple and facile way.
• LiMn2O4 microspheres are successfully produced from multi-shell MnO2.
• LiMn2O4 microspheres show a close-to-theory specific capacity.
• LiMn2O4 microspheres also exhibit an excellent rate performance.

A facile and convenient method is proposed to fabricate the LiMn2O4 microspheres from multi-shell MnO2. Comparing to the LiMn2O4 synthesized from commercial electrolytic MnO2 (EMD), the LiMn2O4 microspheres synthesized in this work exhibit a close-to-theory specific capacity of 145.9 mA h/g at 0.2 C, while the LiMn2O4 from commercial MnO2 only shows a value of 105.3 mA h/g under the same testing conditions. LiMn2O4 microspheres also exhibit an excellent rate performance: 131.8 and 113.3 mA h/g at 5 and 10 C, respectively. This facile and convenient method to prepare LiMn2O4 microspheres provides a new way to fabricate lithium manganate cathode materials with high specific capacity and rate performance.

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