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首页> 外文期刊>Advanced Functional Materials >Ever-Increasing Pseudocapacitance in RGO-MnO-RGO Sandwich Nanostructures for Ultrahigh-Rate Lithium Storage
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Ever-Increasing Pseudocapacitance in RGO-MnO-RGO Sandwich Nanostructures for Ultrahigh-Rate Lithium Storage

机译：RGO-MnO-RGO三明治纳米结构中用于超高速率锂存储的伪电容不断增加

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摘要

Lithium ion batteries have attained great success in commercialization owing to their high energy density. However, the relatively delaying discharge/charge severely hinders their high power applications due to intrinsically diffusion-controlled lithium storage of the electrode. This study demonstrates an ever-increasing surface redox capacitive lithium storage originating from an unique microstructure evolution during cycling in a novel RGO-MnO-RGO sandwich nanostructure. Such surface pseudocapacitance is dynamically in equilibrium with diffusion-controlled lithium storage, thereby achieving an unprecedented rate capability (331.9 mAh g(-1) at 40 A g(-1), 379 mAh g(-1) after 4000 cycles at 15 A g(-1)) with outstanding cycle stability. The dynamic combination of surface and diffusion lithium storage of electrodes might open up possibilities for designing high-power lithium ion batteries.
机译：锂离子电池由于其高能量密度而在商业化方面取得了巨大成功。然而，由于电极的本质上受扩散控制的锂存储，相对延迟的放电/充电严重阻碍了其高功率应用。这项研究表明，在新型RGO-MnO-RGO三明治纳米结构的循环过程中，独特的微观结构演变导致表面氧化还原电容性锂的存储量不断增加。这种表面伪电容与扩散控制的锂存储动态地处于平衡状态，从而实现了空前的速率能力（40 A g（-1）时为331.9 mAh g（-1），在15 A时经过4000次循环后达到379 mAh g（-1） g（-1）），具有出色的循环稳定性。电极的表面和扩散锂存储的动态组合可能为设计大功率锂离子电池开辟可能性。

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  • 来源
    《Advanced Functional Materials》 |2016年第13期|2198-2206|共9页
  • 作者

    Yuan Tianzhi; Jiang Yinzhu; Sun Wenping; Xiang Bo; Li Yong; Yan Mi; Xu Ben; Dou Shixue;

  • 作者单位

    Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Key Lab Novel Mat Informat Technol Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China|Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Key Lab Novel Mat Informat Technol Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China|Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;

    Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia;

    Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Key Lab Novel Mat Informat Technol Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China|Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Key Lab Novel Mat Informat Technol Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China|Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Key Lab Novel Mat Informat Technol Zhejiang Prov, Hangzhou 310027, Zhejiang, Peoples R China|Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China;

    Northumbria Univ, Fac Engn & Environm, Smart Mat & Surfaces Lab, Mech Engn, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England;

    Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    anode; high-rate battery; lithium storage; MnO; pseudocapacitance;

    机译：阳极;高倍率电池;锂存储;MnO;伪电容;

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