期刊
JOURNAL OF POWER SOURCES
卷 355, 期 -, 页码 134-139出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.04.055
关键词
LiMnTiO4; Nanorod; Template; Spinel framework; Li-ion battery
资金
- Materials and Components Research and Development - Ministry of Knowledge Economy (MKE, Korea) [10044203]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2014R1A1A1002909, 2016R1E1A2020571]
- Strategic Key-Material Development - Ministry of Knowledge Economy (MKE, Korea) [10044203]
- National Research Foundation of Korea [2016R1E1A2020571] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Spinel-layered composites of Li1.5MnTiO4+delta were studied for their use as high-energy, low-cost, and environmentally benign cathode materials. The bulk particles showed an attractive specific capacity of up to 250 mAh g(-1) at C/10. To improve the performance of this cathode at a high C-rate, a spinel-layered Li1.5MnTiO4+delta nanorod was successfully synthesized using a beta-MnO2 nanorod template. The nanorod, which had an average diameter of 200 nm and a length of 1 gm, showed specific capacity as high as the bulk particle at C/10. However, owing to a one-dimensional nanostructure with a large effective contact area for Li+ diffusion, the nanorod sample exhibited enhanced capacities 11% (170 mAh g(-1)) and 167% higher (80 mAh g(-1)) at 1C and 10C rates, respectively, compared to the bulk particles. Moreover, both samples showed good cycle stability and capacity retention of over 85% after 100 cycles at 1C. (C) 2017 Elsevier B.V. All rights reserved.
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