Multidimensional Synergistic Nanoarchitecture Exhibiting Highly Stable and Ultrafast Sodium‐Ion Storage |
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| Authors: | Shuangshuang Tan Yalong Jiang Qiulong Wei Qianming Huang Yuhang Dai Fangyu Xiong Qidong Li Qinyou An Xu Xu Zizhong Zhu Xuedong Bai Liqiang Mai |
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| Affiliation: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, China;2. Department of Materials Science and Engineering, University of California Los Angeles, CA, USA;3. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese academy of Sciences, Beijing, China;4. Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, China;5. Department of Chemistry, University of California, Berkeley, CA, USA |
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| Abstract: | Conversion‐type anodes with multielectron reactions are beneficial for achieving a high capacity in sodium‐ion batteries. Enhancing the electron/ion conductivity and structural stability are two key challenges in the development of high‐performance sodium storage. Herein, a novel multidimensionally assembled nanoarchitecture is presented, which consists of V2O3 nanoparticles embedded in amorphous carbon nanotubes that are then coassembled within a reduced graphene oxide (rGO) network, this materials is denoted V2O3?C‐NTs?rGO. The selective insertion and multiphase conversion mechanism of V2O3 in sodium‐ion storage is systematically demonstrated for the first time. Importantly, the naturally integrated advantages of each subunit synergistically provide a robust structure and rapid electron/ion transport, as confirmed by in situ and ex situ transmission electron microscopy experiments and kinetic analysis. Benefiting from the synergistic effects, the V2O3?C‐NTs?rGO anode delivers an ultralong cycle life (72.3% at 5 A g?1 after 15 000 cycles) and an ultrahigh rate capability (165 mAh g?1 at 20 A g?1, ≈30 s per charge/discharge). The synergistic design of the multidimensionally assembled nanoarchitecture produces superior advantages in energy storage. |
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| Keywords: | high rate multidimensional nanostructures sodium‐ion batteries synergistic effects ultralong cycle life V2O3
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