Hard carbon/Li2.6Co0.4N composite anode materials for Li-ion batteries |
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| Affiliation: | 1. Center for Materials Architecturing, Institute for Multi-Disciplinary Convergence of Materials, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Soengbuk-gu, Seoul, 136-791, Republic of Korea;2. Department of Chemical Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-gu, Seoul, 130-743, Republic of Korea;3. Nanomaterials Science and Engineering, University of Science and Technology, 176 Gajung-dong, Yuseong-gu, Daejeon, 305-333, Republic of Korea;1. Laboratory of Fiber modification and Functional Fiber, College of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China;2. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;3. Synergetic Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, PR China;1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;2. College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;3. Shanghai Institute of Space Power-Sources, Shanghai, 200000, China;1. Laboratory of Fiber modification and Functional Fiber, College of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China;2. Tianjin Lishen Battery Joint-Stock Co., Ltd, Tianjin 300384, PR China;1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China;2. State Key Laboratory of New Ceramics & Fine Processing, Beijing, 100084, China;3. State Key Laboratory of Automotive Safety and Energy, Beijing, 100084, China |
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| Abstract: | Hard carbon/Li2.6Co0.4N composite anode electrode is prepared to reduce the initial high irreversible capacity of hard carbon, which hinders potential application of hard carbon in lithium ion batteries, by introducing Li2.6Co0.4N into hard carbon. Lithiated Li2.6Co0.4N provides the compensation of lithium in the first cycle, leading to a high initial coulombic efficiency of ca. 100% versus lithium. As-prepared hard carbon/Li2.6Co0.4N composite electrode presents initial capacity of 438 mA h g− 1. A full cell using LiCoO2 cathode and the composite anode shows much higher initial coulombic efficiency and capacity than those of a cell using LiCoO2 and hard carbon anode. This paves the way to reduce the large initial irreversible capacity of hard carbon. |
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