Khảo sát ảnh hưởng của tỷ lệ phối trộn cacbon dẫn graphit - muội than axetylen đến tính chất điện hóa của vật liệu điện thế cao LiNi0.5Mn1.5O4

In this work, the effect of composition to the electrochemical properties of spinel LiNio.sM1.504 (LNMO) was investigated. The cathode was prepared with a series of acetylene black:graphite contents 12.5:12.5; 10:10; 7.5:7.5; 5:5 and 2.5:2.5. The electrochemical properties were evaluated by Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV) and Galvanostatic Cycling with Potential Limitation (GCPL). The optimized content 75% of LNMO could reduce charge transfer and reduce the barrier for Lt ion diffusion into the cathode.