高容量Ni-LDH负极材料储锂性能的多角度协同优化与机理研究

层状氢氧化镍（Ni-LDH）具有储锂容量高（1735 mAh/g）、制备成本低、资源丰富等优点，是一种很有应用前景的锂离子电池新型负极材料。然而，Ni-LDH差的循环性能和不良的倍率性能严重制约了其发展和应用。针对以上问题，本项目从与N-rGO原位复合和板层/插层组成结构调控等角度协同优化Ni-LDH的储锂性能：①制备Ni-LDH/N-rGO纳米复合材料，通过与N-rGO复合提高材料的倍率性能；②在Ni-LDH板层中引入具有不同功能的金属阳离子，改善Ni-LDH的储锂活性和相转化反应动力学；③在Ni-LDH层间构筑具有柔性骨架的有机阴离子柱撑，缓冲Ni-LHD在充放电过程中的体积效应，强化储锂反应动力学，提高Ni-LDH的长循环性能。项目研究对深入理解Ni-LDH材料的储锂电化学性能机理和构效关系具有重要意义，对其他具有类似层状结构的功能材料的结构调控和性能优化也具有积极的借鉴意义。

Layered nickel hydroxide (Ni-LDH) is a very promising novel high-performance anode material for lithium-ion batteries, as it offers the essential advantage of high capacity (~1735 mAh/g), low preparation cost, and abundance. However, the bad cycling stability and poor electrical conductivity severely hampers its development and practical application. In view of the above problems, the following investigations will be carried out in this project: ①Boost the high rate capability of Ni-LDH by fabricating Ni-LDH/N-rGO nanocomposite; ②Improve the lithium storage activity and accelerate the mechanics of conversion reaction of Ni-LDH by introducing alien metal cations with different function in the LHD slab; ③Enhance the cycling stability and lithium storage kinetics of Ni-LDH by constructing flexible organic anion pillars in the interlayer space of LHD. The investigations of this project have vital significance for the in-depth understanding of the lithium storage properties, mechanism, and structure/performance relationship of Ni-LDH, which is helpful the structural design and performance optimization of other functional materials with similar layered structure.