固态电池一体化成型技术研究数据集

相比于易燃的液态电解液，固态电解质在构建高安全高能量的锂金属电池方面发挥着重要的作用。由于金属有机骨架材料（MOFs）所具备的离子筛选能力和有序的多孔结构等特点，已成为制备固态电解质的潜力材料，通过其灵活的分子结构设计和调节能力制造高电导率的电解质，或作为修饰层连通电解质与电极界面。MOFs固态电解质展现出高灵活性与机械稳定性，从而增强电池的整体性能，展现出作为固态电解质材料的优秀潜力，但仍是一个尚处于发展阶段的研究领域，尤其是基于MOFs构建的全固态电解质未得到充分研究。本研究以4-氰基吡啶作为配体，与镍（Ni）等六种金属进行配位，合成不同金属的MOFs材料，通过压制的方式制备了MOFs基全固态电解质，并通过电化学性能分析不同MOFs的性能差异，其中最佳材料为Ni-4QBD。并通过加热压制的方式提升了其电池性能，组装的Li//LFP电池在4.0 V下稳定循环超过200次，容量保持率也在90.3%，并且在高电压和高倍率的下也可稳定运行，实现了MOF基全固态电解质的制备，拓宽了MOFs材料在电解质中的应用。

Compared to flammable liquid electrolytes, solid-state electrolytes play a critical role in constructing high-safety and high-energy-density lithium metal batteries. Metal-organic frameworks (MOFs), with their ion-sieving capability, ordered porous structure and other advantageous characteristics, have emerged as promising candidates for solid-state electrolyte fabrication. They can be used to prepare high-conductivity electrolytes through flexible molecular structure design and modulation, or serve as interfacial modification layers to bridge the electrolyte and electrode interfaces. MOF-based solid-state electrolytes exhibit high flexibility and mechanical stability, thereby enhancing the overall performance of batteries, demonstrating excellent potential as solid-state electrolyte materials. However, this research field is still in the developmental stage, and all-solid-state electrolytes constructed based on MOFs in particular have not been sufficiently studied. In this study, 4-cyanopyridine was used as a ligand to coordinate with six types of metals including nickel (Ni), and MOF materials with different metal centers were synthesized. MOF-based all-solid-state electrolytes were prepared via the pressing method, and the performance differences among various MOFs were analyzed through electrochemical tests, with the optimal material identified as Ni-4QBD. Additionally, battery performance was further improved via hot pressing. The assembled Li//LFP battery stably cycled over 200 cycles at 4.0 V, with a capacity retention rate of 90.3%, and also operated stably under high voltage and high-rate conditions. This work successfully realized the fabrication of MOF-based all-solid-state electrolytes and broadened the application scope of MOF materials in electrolyte systems.