Dataset of "Influence of the PESU/PVP based nanofibrous separators on the properties of LNMO cathode based Li-ion batteries"

The properties of selected separators and their influence on the electrochemical properties of a high-voltage cathode material were investigated in this paper. The LiCr0.1Ni0.4Mn1.5O4 material synthesized by a solid-state reaction was chosen as the testing material. Four kinds of separators were selected for this study, including a glass fiber separator, a commercial separator made by Celgard and experimental separators made by the Nafigate Corporation. The main goal was to study the properties of the commercial and non-commercial separators and their influence on reached capacity, stability during cycling at high loads and stability during cycling at high temperatures. It was observed that the Nafigate separators are more thermally stable with lower shrinking up to 150 °C and exhibit comparable conductivity to the Celgard separator. In combination with the LiCr0.1Ni0.4Mn1.5O4 cathode, the Nafigate separator also achieves higher capacity at lower C-rate (0.5 C ~ 130 mAh·g-1) and at higher load (5 C) it reaches ~ 111 mAh·g-1. The Celgard separator reaches the capacity of ~ 118 mAh·g-1 at 0.5 C and ~ 83 mAh·g-1 at higher load (5 C).本文针对选定隔膜（separator）的各项性能及其对高压正极材料电化学性能的影响展开了研究。本研究选用固相合成法（solid-state reaction）制备的LiCr₀.₁Ni₀.₄Mn₁.₅O₄材料作为测试用正极材料。本次研究共选用四种隔膜，分别为玻璃纤维隔膜、赛立格（Celgard）公司生产的商用隔膜，以及纳菲特（Nafigate）公司制备的实验用隔膜。本研究的核心目标为探究商用与非商用隔膜的性能，及其对电池放电容量、高倍率循环稳定性以及高温循环稳定性的影响。研究结果表明，纳菲特隔膜具备更优异的热稳定性，在150℃以内的热收缩率更低，且电导率与赛立格隔膜相当。将其与LiCr₀.₁Ni₀.₄Mn₁.₅O₄正极搭配使用时，纳菲特隔膜在低倍率（C-rate，0.5 C）下可实现约130 mAh·g⁻¹的放电容量，在高负载（5 C）下仍可达到约111 mAh·g⁻¹的放电容量；而赛立格隔膜在0.5 C倍率下的放电容量约为118 mAh·g⁻¹，在5 C高负载下仅能达到约83 mAh·g⁻¹的放电容量。