Rajagopal Rajesh, Subramanian Yuvaraj, Ryu Kwang-Sun
Department of Chemistry, University of Ulsan Doowang-dong, Nam-gu Ulsan 44776 Korea
Energy Harvest Storage Research Center (EHSRC), University of Ulsan Mugeo-dong, Nam-gu Ulsan 44610 Korea.
RSC Adv. 2021 Oct 7;11(52):32981-32987. doi: 10.1039/d1ra05897e. eCollection 2021 Oct 4.
We studied the efficiency of different particle-sized sulfide solid electrolyte-based cathode composites. First, we prepared the LiPSI solid electrolytes with different particle sizes through a high energy ball milling process and solution method. The structural details of the prepared solid electrolytes were studied by powder X-ray diffraction. The surface morphologies and particle size of the electrolytes were studied by field emission electron microscopy. The ionic conductivity of the prepared solid electrolytes was studied by the electrochemical impedance spectroscopy technique. Finally, we have prepared a LiNiCoMnO (NCM 811) based cathode composite and studied the electrochemical performance of the fabricated all-solid-state lithium batteries. The mixed particle-sized solid electrolyte-based cathode composite exhibited higher specific capacitance (127.2 mA h g) than the uniform-sized solid electrolyte-based cathode composite (117.1 mA h g). The electrochemical analysis confirmed that the sulfide solid electrolytes with mixed particle size exhibited better electrochemical performance.
我们研究了不同粒径的基于硫化物固体电解质的阴极复合材料的效率。首先，我们通过高能球磨工艺和溶液法制备了不同粒径的LiPSI固体电解质。通过粉末X射线衍射研究了所制备固体电解质的结构细节。用场发射电子显微镜研究了电解质的表面形貌和粒径。通过电化学阻抗谱技术研究了所制备固体电解质的离子电导率。最后，我们制备了基于LiNiCoMnO（NCM 811）的阴极复合材料，并研究了所制造的全固态锂电池的电化学性能。混合粒径的基于固体电解质的阴极复合材料表现出比均匀粒径的基于固体电解质的阴极复合材料（117.1 mA h g）更高的比电容（127.2 mA h g）。电化学分析证实，混合粒径的硫化物固体电解质表现出更好的电化学性能。
