Ultrasound-assisted synthesis of Li-rich mesoporous LiMn2O4 nanospheres for enhancing the electrochemical performance in Li-ion secondary batteries |
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Authors: | Kim Jung Min Lee Gaehang Kim Byung Hoon Huh Yun Suk Lee Go-Woon Kim Hae Jin |
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Institution: | a Division of Materials Science, Korea Basic Science Institute (KBSI), Daejeon 305-333, Republic of Korea b Graduate School and Department of Analytical Science and Technology, Chungnam National University, Daejeon 305-764, Korea |
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Abstract: | The hierarchically structured mesoporous LiMn2O4 (LMO) nanospheres were synthesized using a template-free self-assembly process that was coupled with ultrasound (U). The ultrasound technique suggested here is very powerful for controlling an ordered nanostructure and improving crystallinity with large single-crystalline domains. Owing to the hierarchical mesoporous structure and high crystallinity, U-LMO provides an excellent rate capability and cycle stability with a capacity retention of more than 98% up to 50 cycles at a 0.2 C rate. Here, we demonstrate that mesoporous U-LMO nanospheres were fabricated to enhance the electrochemical performance and protect it from structurally significant collapsing because of high crystallinity. |
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Keywords: | Ultrasound Lithium manganese oxides Mesoporous nanosphere Crystallinity Single-crystalline domains |
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