Binder-free carbon-coated TiO2@graphene electrode by using copper foam as current collector as a high-performance anode for lithium ion batteries |
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| Affiliation: | 1. Key Laboratory of Graphene Technologies&Applications of Zhejiang Province and Advanced Li-ion Battery Engineering Laboratory, Ningbo Institute of Materials Technology&Engineering, Chinese Academy of Sciences, Zhejiang 315201, PR China;2. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China;1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha, 410083, PR China;2. School of Metallurgy and Environment, Central South University, Changsha, 410083, PR China;3. WMG, University of Warwick, Coventry, CV4 7AL, United Kingdom;4. KBC Corporation, LTD., Yiyang, 413000, PR China;1. Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China;2. Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China;3. College of Chemistry and Chemical Engineering, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi’s Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, PR China;4. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China;1. School of Materials Science and Engineering, Kookmin University, Seoul 136-702, Republic of Korea;2. School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea;3. Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea;4. Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea;5. Cellmotive Co. Ltd., #518, Engineering Building, Kookmin University, Seoul 136-702, Republic of Korea;1. State Key Laboratory of Separation Membrane and Membrane Processes, Tianjin Municipal Key Laboratory of Advanced Fibers and Energy Storage, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China;2. School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin, 300387, China;3. Test Center, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science (CAS), Ningbo, 315201, China;4. School of Materials Science and Engineering, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China |
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| Abstract: | Anatase TiO2 is widely used in lithium ion batteries (LIBs) due to its excellent safety and excellent structural stability. However, due to the poor ion and electron transport and low specific capacity (335 mAh g?1) of TiO2, its application in LIBs is severely limited. For the first time, we report a binder-free, carbon-coated TiO2@graphene hybrid by using copper foam as current collector (TG-CM) to enhance the ionic and electronic conductivity and increase the discharge specific capacity of the electrode material without adding conductive carbon (such as super P, etc.) and a binder (such as polyvinylidene fluoride (PVDF), etc.). When serving as an anode material for LIBs, TG-CM displays excellent electrochemical performance in the voltage range of 0.01–3.0 V. Moreover, the TG-CM hybrid delivers a high reversible discharge capacity of 687.8 mAh g?1 at 0.15 A g?1. The excellent electrochemical performance of the TG-CM hybrid is attributed to the increased lithium ion diffusion rate due to the introduction of graphene and amorphous carbon layer, and the increased contact area between the active material and electrolyte, and small resistance with copper foam as the current collector without an additional binder (PVDF) and conductivity carbon (super P). |
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| Keywords: | Lithium ion battery Copper foam Binder-free Graphene |
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