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首页> 外文期刊>Advanced energy materials >Superassembly of Porous Fe_(tet)(NiFe)octO Frameworks with Stable Octahedron and Multistage Structure for Superior Lithium–Oxygen Batteries
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Superassembly of Porous Fe_(tet)(NiFe)octO Frameworks with Stable Octahedron and Multistage Structure for Superior Lithium–Oxygen Batteries

机译：多孔Fe_（TET）（NIFE）octo框架的超级组件，具有稳定的八面体和多级锂电池的多级结构

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摘要

Promising lithium-oxygen batteries (LOBs) with extra-high capacities have attracted increasing attention for use in future electric devices. However, the challenges facing this complicated battery system still limit their practical applications. These challenges mainly consist of inefficient product evolution and low-activity catalysts. In present work, a cation occupying, modified 3D-architecture NiFeO cubic spinel is constructed via superassembly strategy to achieve a high rate, stable electrocatalyst for LOBs. The octahedron predominant spinel provides a stable polycrystal structure and optimized electronic structure, which dominates the discharge/charge products evolution with multiformation kinetics of crystal Li2O2 and Li2-xO2 at low and high rate conditions and energetically favors the mass transport between the electrode/electrolyte interface. Simultaneously, the porous NiFeO framework provides adequate spaces for Li2O2 accommodation and complex channels for sufficient electrolyte, oxygen, and ion transportation, which dramatically alter the cathode catalysis for an unprecedented performance. As a consequence, a large specific capacity of 23413 mAh g(-1) and an excellent cyclability of 193 cycles at a high current of 1000 mA g(-1), and 300 cycles at a current of 500 mA g(-1), are achieved. The present work provides intrinsic insights into designing high-performance metal oxide electrocatalysts for Li-O-2 batteries with fine-tuned electronic and frame structure.
机译：具有超高容量的承诺锂 - 氧气电池（LOO波）吸引了在未来的电气设备中使用的越来越关注。然而，这种复杂的电池系统面临的挑战仍然限制了其实际应用。这些挑战主要由效率低下的产品进化和低活性催化剂组成。在目前的工作中，通过超级组织策略构建了一种占据，改进的3D架构Nifeo立方尖晶石，以实现高速，稳定的叶子电催化剂。八面体主要尖晶石提供稳定的多晶结构和优化的电子结构，其在低和高速率条件下用晶体Li2O2和Li2-XO2的多圆形动力学主导了放电/充电产品演进，并且能够在电极/电解质界面之间进行大量传输。同时，多孔NIFEO框架为Li2O2的住宿和复杂通道提供足够的电解质，氧和离子运输的空间，这显着改变了阴极催化作用以进行前所未有的性能。因此，在1000mA g（-1）的高电流下，具有23413mAhg（-1）的大特异性容量为23413mAhg（-1），以及在1000mA g（-1）的高电流下为300次循环，并且在500mA g（-1）的电流下，实现。本作本作的内部见解为设计高性能金属氧化物电池设计为Li-O-2电池，具有微调电子和框架结构。

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  • 来源
    《Advanced energy materials》 |2020年第21期|1904262.1-1904262.13|共13页
  • 作者

    He Biao; Wang Jun; Liu Jiaqing; Li Yong; Huang Qishun; Hou Yue; Li Gaoyang; Li Jiajia; Zhang Runhao; Zhou Junjie; Tian Wei; Du Yong; Dang Feng; Wang Hongchao; Kong Biao;

  • 作者单位

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut & Proc Mat Jinan 250061 Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut & Proc Mat Jinan 250061 Peoples R China;

    Qilu Univ Technol Shandong Acad Sci Adv Mat Inst Natl Supercomp Res Ctr Adv Mat Jinan 250014 Peoples R China;

    Qilu Univ Technol Shandong Acad Sci Adv Mat Inst Natl Supercomp Res Ctr Adv Mat Jinan 250014 Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut & Proc Mat Jinan 250061 Peoples R China;

    Qilu Univ Technol Shandong Acad Sci Adv Mat Inst Natl Supercomp Res Ctr Adv Mat Jinan 250014 Peoples R China|Fudan Univ iChEM Shanghai Key Lab Mol Catalysis & Innovat Mat Dept Chem Shanghai 200433 Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut & Proc Mat Jinan 250061 Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut & Proc Mat Jinan 250061 Peoples R China;

    Fudan Univ iChEM Shanghai Key Lab Mol Catalysis & Innovat Mat Dept Chem Shanghai 200433 Peoples R China;

    Fudan Univ iChEM Shanghai Key Lab Mol Catalysis & Innovat Mat Dept Chem Shanghai 200433 Peoples R China;

    Fudan Univ iChEM Shanghai Key Lab Mol Catalysis & Innovat Mat Dept Chem Shanghai 200433 Peoples R China;

    Cent South Univ State Key Lab Powder Met Changsha 410083 Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut & Proc Mat Jinan 250061 Peoples R China;

    Shandong Univ Sch Phys Jinan 250100 Peoples R China;

    Fudan Univ iChEM Shanghai Key Lab Mol Catalysis & Innovat Mat Dept Chem Shanghai 200433 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    lithium-oxygen batteries; NiFeO frameworks; superassembly;

    机译：锂 - 氧气电池;Nifeo框架;超级组装;

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