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Hierarchical NiO nanobelt film array as an anode for lithium-ion batteries with enhanced electrochemical performance

机译:分层NIO纳米玻璃阵列作为锂离子电池的阳极,具有增强的电化学性能

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摘要

In this study, an ultrathin 2-dimensional hierarchical nickel oxide nanobelt film array was successfully assembled and grown on a Ni substrate as a binder-free electrode material for lithium ion batteries. In the typical synthesis process, the evolution of the nickel oxide array structure was controlled by adjusting the amount of surfactant, duration of reaction time and hydrothermal temperature. By virtue of the beneficial structural characteristics of the nanobelt film array, the as-obtained NiO array electrode exhibits excellent lithium storage capacity (1035 mA h g(-1) at 0.2C after 70 cycles and 839 mA h g(-1) at 0.5C after 70 cycles) for LIBs. This excellent electrochemical performance is attributed to the nanobelt film (3-5 nm thickness) array structures, which have immense open spaces that offer more Li+ storage active sites and adequate buffering space to reduce internal mechanical stress and shorten the Li+ diffusion distance. Additionally, this array structure is designed to achieve a binder-free and non-conductive additive electrode without complex coating and compressing during the electrode preparation process.
机译:在该研究中,在Ni衬底上成功地组装并生长了超薄二维分层氧化物纳米玻璃膜阵列,作为用于锂离子电池的无粘合剂电极材料。在典型的合成过程中,通过调节表面活性剂,反应时间的持续时间和水热温度来控制氧化镍阵列结构的演化。借助于纳米玻璃膜阵列的有益结构特性,在70次循环后的0.2℃下具有优异的锂储存容量(1035mA Hg(-1),在0.5℃下显示出优异的锂储存容量(1035mA Hg(-1) 70次循环以后)为libs。这种优异的电化学性能归因于纳米玻璃膜(3-5nm厚度)阵列结构,其具有巨大的开放空间,其提供更多的Li +储存活性位点和足够的缓冲空间以降低内部机械应力并缩短Li +扩散距离。另外,该阵列结构被设计成在电极制备方法期间实现无,而无需复合涂层并且压缩的无导电添加电极。

著录项

  • 来源
    《RSC Advances》 |2018年第47期|共7页
  • 作者单位

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning Peoples R China;

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning Peoples R China;

    Guangxi Univ Collaborat Innovat Ctr Sustainable Energy Mat Nanning Peoples R China;

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

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