Synthesis and electrochemical performance of Li4Ti5O12 submicrospheres coated with TiN as anode materials for lithium-ion battery |
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| Affiliation: | 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30 College Road, Beijing 100083, China;2. China Electric Power Research Institute, Beijing 100085, China;1. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC) c/Sor Juana Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain;2. Laboratoire de Chimie des Matériaux et de l''Environnement, Université Cadi Ayyad. Avenue A. Khattabi, BP 549 Marrakech, Morocco;1. Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;2. Department of Nano Fusion Technology and College of Nanoscience and Nanotechnology, Pusan National University, Busan 609-735, South Korea;3. Department of Chemistry, Sungshin Women’s University, Seoul 142-732, South Korea;4. Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 443-803, South Korea;1. Fujian Provincial Key Laboratory of Functional Materials and Applications, Institute of Advanced Energy Materials, School of Materials Science and Engineering, Xiamen University of Technology, 600 Ligong Road, Jimei, Xiamen 361024, China;2. College of Physics Science and Technology, Shenyang Normal University, 253 North Huanghe Street, Shenyang 110034, China |
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| Abstract: | The TiN coated Li4Ti5O12 (LTO) submicrospheres with high electrochemical performance as anode materials for lithium-ion battery were synthesized successfully by solvothermal method and subsequent nitridation process in the presence of ammonia. The XRD results revealed that the crystal structure of LTO did not change after thermal nitridation process. The submicrospheres morphology of LTO and TiN film on the surface of LTO submicrospheres were characterized by FESEM and HRTEM, respectively. XPS result confirmed that a small amount of Ti changed from Ti4+ to Ti3+ after nitridation process, which will increase the electronic conductivity of LTO. Electrochemical results showed that electrochemical performance of TiN coated LTO anode materials compared favorably with that of pure LTO. Also its rate capability and cycling performance were apparently superior to those of pure LTO. The reversible capacity of TiN-LTO is 105.2 mA h g?1 at a current density of 10 C after 100 cycles and maintain 92.9% of its initial discharge capacity, while that of pure LTO is only 83.6 mA h g?1 with a capacity retention of 90.3%. Even at 20 C, the discharge capacity of TiN coated LTO sample is 101.3 mA h g?1, compared with 77.3 mA h g?1 for pristine LTO in the potential range 1.0–2.5 V (vs. Li/Li+). |
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| Keywords: | TiN Submicrospheres Coated Lithium-ion battery |
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