Integrated Intercalation‐Based and Interfacial Sodium Storage in Graphene‐Wrapped Porous Li4Ti5O12 Nanofibers Composite Aerogel |
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| Authors: | Chaoji Chen Henghui Xu Tengfei Zhou Zaiping Guo Lineng Chen Mengyu Yan Liqiang Mai Pei Hu Shijie Cheng Yunhui Huang Jia Xie |
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| Affiliation: | 1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, P. R. China;2. State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, P. R. China;3. Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials (AIIM), School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, North Wollongong, NSW, Australia;4. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT‐Harvard Joint Nano Key Laboratory, Wuhan University of Technology, Wuhan, P. R. China;5. Collaborative Innovation Center of Intelligent New Energy Vehicle, Tongji University, Shanghai, P. R. China |
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| Abstract: | Sodium storage in both solid–liquid and solid–solid interfaces is expected to extend the horizon of sodium‐ion batteries, leading to a new strategy for developing high‐performance energy‐storage materials. Here, a novel composite aerogel with porous Li4Ti5O12 (PLTO) nanofibers confined in a highly conductive 3D‐interconnected graphene framework (G‐PLTO) is designed and fabricated for Na storage. A high capacity of 195 mA h g?1 at 0.2 C and super‐long cycle life up to 12 000 cycles are attained. Electrochemical analysis shows that the intercalation‐based and interfacial Na storage behaviors take effect simultaneously in the G‐PLTO composite aerogel. An integrated Na storage mechanism is proposed. This study ascribes the excellent performance to the unique structure, which not only offers short pathways for Na+ diffusion and conductive networks for electron transport, but also guarantees plenty of PLTO–electrolyte and PLTO–graphene interfacial sites for Na+ adsorption. |
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| Keywords: | graphene frameworks interfacial sodium storage Li4Ti5O12 long‐life sodium‐ion batteries |
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