传统的镍电极材料仅涉及单个电子反应，理论比容量低、导电性差直接限制了碱性镍基二次电池性能的进一步提升。本项目基于Ni/Al层状双氢氧化物（Ni/Al-LDH）的多电子反应特性来构筑高容量镍电极纳米材料，特别是提出通过原位复合石墨烯（Graphene）和对Ni/Al-LDH进行插层结构调控设计来有效地提高镍电极材料电子导电性和质子扩散能力。利用XRD、SEM、HRTEM、Raman、FT-IR、XPS、ICP等物理表征，CV、EIS、充放电等电化学性能测试并结合第一性原理DFT理论计算研究Ni/Al-LDH/Graphene原位复合电极材料微观结构与宏观电化学性能的内在关系，在原子水平上分析揭示Ni/Al-LDH/Graphene复合材料的界面结构和插层结构调控的作用机理。项目研究对进一步提升镍电极材料的电化学性能以及新型有机/无机功能复合材料的设计制备和性能调控具有重要理论意义和应用价值。

Because of only single electron redox reaction utilized in the conventional nickel electrode materials, the theoretical dishcarge capacity is low. In addition, the poor conductivity of nickel electrode materials is also a big problem for further improving the performance of nickel-based secondary batteries. The purpose of this project is to increase the discharge capacity by using the multi-electron transfer reaction in Ni/Al layer double hydroxide (Ni/Al-LDH). In particular, we proposed to enhance the electrical conductivity of Ni/Al-LDH by preparing Ni/Al-LDH/Graphene in-situ composites, and to improve the proton diffusion ability by tuning the interlayer structure of the Ni/Al-LDH. The relationship between microstrucres and macroscopic electrochemical performances of the prepared composites will be investigated by XRD,SEM, HRTEM, Raman, XPS, ICP, CV, EIS, charge-discharge tests, and first-principles calculations. The interface structure of the Ni/Al-LDH/Graphene composite and the mechanism of interlayer structure tunnning will be revealled at the stomic levels. The investigations of this project have important theoretical significance and practical value for further improving the electrochemical performance of nickel-cathode materials, and design, syntheis, and performance control of other novel organic/inorganic functional composites.