Synthesis and electrochemical performance of hole-rich Li4Ti5O12 anode material for lithium-ion secondary batteries |
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| Institution: | 1. College of Physics and Energy, Fujian Normal University, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou 350117, China;2. Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen 361005, China;1. International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No.1 Dai Co Viet, Hanoi, Vietnam;2. Advanced Institute of Science and Technology (AIST), Hanoi University of Science and Technology (HUST), No.1 Dai Co Viet, Hanoi, Vietnam;3. University of Transportation and Communication, No. 3 Cau Giay, Hanoi, Vietnam;4. Vietnam-Japan International Institute for Science of Technology (VJIIST), Hanoi University of Science and Technology (HUST), No.1 Dai Co Viet, Hanoi, Vietnam;1. Department of Physics, Gebze Technical University, 41400 Gebze, Kocaeli, Turkey;2. Institute of Physics, Azerbaijan National Academy of Sciences, AZ – 1143, Baku, Azerbaijan;3. Physics Engineering Department, Faculty of Science and Letters, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey;1. Facultad de Ingeniería, Universidad Nacional del Comahue, Buenos Aires 1400, 8300 Neuquén, Argentina;2. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas – CONICET-UNCo, Argentina;3. Dpto. de Física, Universidad Nacional del Sur, Bahía Blanca, Argentina;4. Instituto de Física – UNS-CONICET, Argentina;5. Centro Atómico Bariloche e Instituto Balseiro, Avda. Bustillo 9500, 8400 Bariloche, Argentina;6. CONICET, Argentina |
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| Abstract: | Hole-rich Li4Ti5O12 composites are synthesized by spray drying using carbon nanotubes as additives in precursor solution, subsequently followed calcinated at high temperature in air. The structure, morphology, and texture of the as-prepared composites are characterized with XRD, Raman, BET and SEM techniques. The electrochemical properties of the as-prepared composites are investigated systematically by charge/discharge testing, cyclic voltammograms and AC impedance spectroscopy, respectively. In comparison with the pristine Li4Ti5O12, the hole-rich Li4Ti5O12 induced by carbon nanotubes exhibits superior electrochemical performance, especially at high rates. The obtained excellent electrochemical performances of should be attributed to the hole-rich structure of the materials, which offers more connection-area with the electrolyte, shorter diffusion-path length as well faster migration rate for both Li ions and electrons during the charge/discharge process. |
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| Keywords: | Lithium-ion batteries Lithium titanate Carbon nanotubes High-rate capability |
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