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首页> 外文期刊>Advanced energy materials >Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries
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Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries

机译：通过可调谐阳极氧化架构无定形钒氧化物/ MXENE纳米粉剂，用于高性能钠离子电池

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摘要

Structural engineering and creating atomic disorder in electrodes are promising strategies for highly efficient and rapid charge storage in advanced batteries. Herein, a nanohybrid architecture is presented with amorphous vanadium oxide conformally coated on layered V2C MXene (a-VOx/V2C) via tunable anodic oxidation, which exhibits a high reversible capacity of 307 mAh g(-1) at 50 mA g(-1), decent rate capability with capacity up to 96 mAh g(-1) at 2000 mA g(-1), and good cycling stability as a cathode for sodium-ion batteries. The a-VOx layer enables reversible and fast Na+ insertion/extraction by providing sufficient vacancies and open pathways in the amorphous framework, unlike the irreversible phase transition in its crystalline counterpart, while layered V2C MXene offers abundant electron/ion transfer channels, which are joined together to boost the electrochemical performance. Notably the improved reversibility and structural superiority of the a-VOx/V2C nanohybrid are clearly revealed by in situ Raman, in situ transmission electron microscopy, in situ synchrotron X-ray absorption spectroscopy, and density functional theory calculations, demonstrating a reversible V-O vibration and valence oscillation between V4+ and V5+ in the disordered framework, with robust structural stability and unobstructed Na+ diffusion. This work provides a meaningful reference for the elaborate design of MXene-based nanostructured electrodes toward advanced rechargeable batteries.
机译：结构工程和电极产生原子的无序状态是在先进电池高效，快速的电荷存储好的战略。在此，纳米杂化体系结构呈现非晶态氧化钒形涂覆在层状V2C MXene（α-氧化钒/ V2C）经由可调阳极氧化，这在50mA克表现出的307毫安克（-1）的高可逆容量（-1 ），体面速率容量容量可达到96毫安时的克（-1）2000毫安克（-1），和良好的循环稳定性，作为钠离子电池的阴极。在a-氧化钒层使得可逆且快速的Na +插入/提取通过提供足够的空位和开放路径在非晶框架，不像在其结晶对应的不可逆相变，而层状V2C MXene提供了丰富的电子/离子传递信道，其连接合力助推电化学性能。值得注意的是在a-氧化钒/ V2C纳米杂化物的改进的可逆性和结构优越性通过原位拉曼清楚地表明，原位透射电子显微镜，原位同步辐射X射线吸收光谱，和密度泛函理论计算，表明可逆VO振动和在无序框架V4 +和V5 +化合价之间振荡，具有强大的结构稳定性和通畅的Na +扩散。这项工作提供了用于朝向先进的可充电电池基于MXene - 纳米结构电极的精心设计一个有意义的参考。

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  • 来源
    《Advanced energy materials》 |2021年第22期|2100757.1-2100757.11|共11页
  • 作者

    Zhang Wang; Peng Jian; Hua Weibo; Liu Ying; Wang Jinsong; Liang Yaru; Lai Weihong; Jiang Yue; Huang Yang; Zhang Wei; Yang Huiling; Yang Yingguo; Li Lina; Liu Zhenjie; Wang Lei; Chou Shu-Lei;

  • 作者单位

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China|Univ Wollongong Inst Superconducting & Elect Mat Australian Inst Innovat Mat Innovat Campus Squires Way North Wollongong NSW 2522 Australia;

    Univ Wollongong Inst Superconducting & Elect Mat Australian Inst Innovat Mat Innovat Campus Squires Way North Wollongong NSW 2522 Australia;

    Xi An Jiao Tong Univ Sch Chem Engn & Technol Xian 710049 Shaanxi Peoples R China;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Univ Wollongong Inst Superconducting & Elect Mat Australian Inst Innovat Mat Innovat Campus Squires Way North Wollongong NSW 2522 Australia;

    Univ Wollongong Inst Superconducting & Elect Mat Australian Inst Innovat Mat Innovat Campus Squires Way North Wollongong NSW 2522 Australia;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Guangdong Univ Technol Guangzhou Key Lab Low Dimens Mat & Energy Storage Sch Mat & Energy Guangzhou 510006 Peoples R China;

    Univ Wollongong Inst Superconducting & Elect Mat Australian Inst Innovat Mat Innovat Campus Squires Way North Wollongong NSW 2522 Australia;

    Chinese Acad Sci Shanghai Adv Res Inst Zhangjiang Lab Shanghai Synchrotron Radiat Facil SSRF Shanghai 201204 Peoples R China;

    Chinese Acad Sci Shanghai Adv Res Inst Zhangjiang Lab Shanghai Synchrotron Radiat Facil SSRF Shanghai 201204 Peoples R China;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Univ Wollongong Inst Superconducting & Elect Mat Australian Inst Innovat Mat Innovat Campus Squires Way North Wollongong NSW 2522 Australia;

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  • 正文语种 eng
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  • 关键词

    amorphous materials; layered MXene; nanohybrid; sodium#8208; ion batteries; tunable anodic oxidation; vanadium oxide;

    机译：无定形材料;层状mxene;纳米式;钠＆＃8208;离子电池;可调阳极氧化;氧化钒;

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