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首页> 外文期刊>RSC Advances >Hierarchical porous ZnMnO3 yolk-shell microspheres with superior lithium storage properties enabled by a unique one-step conversion mechanism
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Hierarchical porous ZnMnO3 yolk-shell microspheres with superior lithium storage properties enabled by a unique one-step conversion mechanism

机译：具有优越的锂储存性能的分层多孔ZnMNO3蛋黄微球，通过独特的一步转换机制实现

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摘要

ZnMnO3 has attracted enormous attention as a novel anode material for rechargeable lithium-ion batteries due to its high theoretical capacity. However, it suffers from capacity fading because of the large volumetric change during cycling. Here, porous ZnMnO3 yolk-shell microspheres are developed through a facile and scalable synthesis approach. This ZnMnO3 can effectively accommodate the large volume change upon cycling, leading to an excellent cycling stability. When applying this ZnMnO3 as the anode in lithium-ion batteries, it shows a remarkable reversible capacity (400 mA h g(-1) at a current density of 400 mA g(-1) and 200 mA h g(-1) at 6400 mA g(-1)) and excellent cycling performance (540 mA h g(-1) after 300 cycles at 400 mA g(-1)) due to its unique structure. Furthermore, a novel conversion reaction mechanism of the ZnMnO3 is revealed: ZnMnO3 is first converted into intermediate phases of ZnO and MnO, after which MnO is further reduced to metallic Mn while ZnO remains stable, avoiding the serious pulverization of the electrode brought about by lithiation of ZnO.
机译：由于其高理论能力，ZnMNO3引起了作为可充电锂离子电池的新型阳极材料。然而，由于循环期间的体积变化大，因此它受到容量衰落。这里，通过容易和可扩展的合成方法开发多孔ZnMNO3蛋白壳微球。该ZnMNO3可以有效地适应循环时的大体积变化，导致优异的循环稳定性。当锂离子电池中的阳极施加该ZnMNO3时，它显示出在6400 mA的400mA G（-1）的电流密度的显着可逆容量（400 mA Hg（-1），并且在6400 mA时G（-1））由于其独特的结构，G（1））和在400 mA G（-1）的300次循环后的优异循环性能（540 mA Hg（-1））。此外，揭示了ZnMNO3的新型转化反应机理：首先将ZnMNO 3转化为ZnO和MNO的中间相，之后，在ZnO保持稳定的同时进一步减少到金属Mn的MNO，避免通过锂化引起的电极的严重粉碎Zno。

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  • 来源
    《RSC Advances》 |2018年第55期|共8页
  • 作者

    Su Xiaoru; Huang Jian; Yan Bangyuan; Hong Zhouping; Li Siyuan; Pang Baocheng; Luo Yulin; Feng Li; Zhou Mingjiong; Xia Yongyao;

  • 作者单位

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Zhejiang Univ State Key Lab Chem Engn Inst Pharmaceut Engn Coll Chem &

    Biol Engn Hangzhou 310027 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Ningbo Univ Sch Mat Sci &

    Chem Engn Ningbo 315211 Zhejiang Peoples R China;

    Fudan Univ Dept Chem Shanghai 200433 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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