2026-04-18T00:05:16Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4872432025-10-05T14:34:41Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Kazda, T. author Vondrák, J. author Sedlaříková, M. author Gómez-Romero, Pedro author Musil, M. author Čudek, P. author Straková, A. Fedorková author Kašpárek, V. author 2015 Lithium - ion batteries play an increasingly important role in the battery industry and they have become the dominant source of energy in the recent years, especially for portable electronic devices due to their high gravimetric energy density. This article examines the influence of mixtures of solvents with different combinations of lithium salts on the stability of two types of high-voltage cathode materials: LiNi0.5Mn1.5O4 and LiCr0.1Ni0.4Mn1.5O4 produced by a solid phase reaction. These materials were combined with several different electrolytes, cycled at various loads and higher temperature. Various combinations of solvents ethylene carbonate (EC), dimethyl carbonate (DMC) and Tetrahydrothiophene 1.1-dioxide (Sulfolane) were used for these measurements. Salts LiPF6, LiNO3 and LiTFSI were used. The influence of solvents and salts on the properties of high-voltage cathode materials was tested by cycling at different current loads and by cycling at high temperature. It was found out, by LSV analysis, that the addition of Sulfolane increases the stability of electrolyte. The addition of chromium to the cathode material LiNi0.5Mn1.5O4 causes increasing of capacity and stability at high temperature. The combination of the cathode material LiCr0.1Ni0.4Mn1.5O4 with the electrolyte 1.5 M LiPF6 EC:DMC:Sulfolane 1:2:1 w/w/w leads to increased stability in comparison with other electrolytes. http://hdl.handle.net/2072/487243 Lithium ion battery LiNi0.5Mn1.5O4 Electrolyte Sulfolane The Influence of Solvents and Salts on the Properties of High-Voltage Cathode Materials