Porous Fe2O3 nanorods anchored on nitrogen-doped graphenes and ultrathin Al2O3 coating by atomic layer deposition for long-lived lithium ion battery anode |
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| Affiliation: | 1. Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang, Liaoning 110004, China;2. Department of Mechanical, Aerospace & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA;3. Department of Chemistry and Biochemistry and Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA;4. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;1. Department of Chemistry, Nanchang University, No. 999, Xuefu Road, New District of Honggutan, Nanchang, Jiangxi 330031, PR China;2. School of Civil Engineering, Harbin Institute of Technology, Heilongjiang 150090, PR China;3. Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA;4. Graphene Research Center, KAIST Institute of NanoCentury, School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;5. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA;1. Department of Physics, The Chinese University of Hong Kong, Hong Kong, China;2. Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong, China;1. School of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China;2. Jiangsu Marine Resources Development Research Institute, Lianyungang 222005, China;3. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;4. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;5. School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China;1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, People’s Republic of China;2. Key Lab of Structure Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin, 150090, People’s Republic of China;3. School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, People’s Republic of China;4. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China;5. Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY, 12180, United States;1. Chemicobiology and Functional Materials Institute, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2. Jiangsu Provincial Key Laboratory of Photonic and Electronic Materials Sciences and Technology, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;1. Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, Heilongjiang, China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;3. School of Transportation Science and Technology, Harbin Institute of Technology, Harbin 150090, China;4. State Key Lab of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China;5. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA;6. Department of Chemistry, Nanchang University, Nanchang 330031, China |
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| Abstract: | Porous iron oxide (Fe2O3) nanorods anchored on nitrogen-doped graphene sheets (NGr) were synthesized by a one-step hydrothermal route. After a simple microwave treatment, the iron oxide and graphene composite (NGr-I-M) exhibits excellent electrochemical performances as an anode for lithium ion battery (LIB). A high reversible capacity of 1016 mAh g−1 can be reached at 0.1 A g−1. When NGr-I-M electrode was further coated by 2 ALD cycles of ultrathin Al2O3 film, the first cycle Coulombic efficiency (CE), rate performance and cycling stability of the coated electrode can be greatly improved. A stable capacity of 508 mAh g−1 can be achieved at 2 A g−1 for 200 cycles, and an impressive capacity of 249 mAh g−1 at 20 A g−1 can be maintained without capacity fading for 2000 cycles. The excellent electrochemical performance can be attributed to the synergy of porous iron oxide structures, nitrogen-doped graphene framework, and ultrathin Al2O3 film coating. These results highlight the importance of a rational design of electrode materials improving ionic and electron transports, and potential of using ALD ultrathin coatings to mitigate capacity fading for ultrafast and long-life battery electrodes. |
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