| Energy and environmental issues are two very serious problems to all the human, along with the tension and the depletion of various energy sources, new energy development is extremely urgent. Lithium-ion battery was get more and more attention because of the high voltage, high specific power, and good cyclic performance, small self-discharge, non-polluting and other advantages. Lithium-ion battery is a hot research field in cell phones, computers, and other standby power applications, especially now, new-green energy lithium-ion electric vehicle research and development is very hot and let more people known the lithium-ion battery. As these areas expand the wide range of applications, lithium-ion batteries will remain a strong market demand for a long time in the future. Lithium-ion battery electrolyte material selection have a great impact on the performance of the battery. Therefore, the development of new lithium salt electrolyte material will advancing the cell development.The thesis is totally divided into three chapters.Chapter 1 A large number of lithium-ion batteries on the literature were consult, and then determine the direction of the subject, select croconate acid and its derivatives of 1,3-substituted as ligands for the design and synthesis of new lithium salts.Chapter 2 Two lithium salts were synthesized: Lithium bis[1,3-(Dicyanomethylene)croconate] brorate (LDCNBCB) and Lithium croconate [1,3-(Dicyanomethylene)croconate] brorate (LDCNCCB). LDCNBCB and LCNCCB structural characters were test by ICP an infrared spectroscopy (IR).Chapter 3 The new lithium salts were test by chemical and electrochemical properties, through solubility, decomposition temperature, conductivity and oxidation potential.In summary, the new lithium salts were synthesized successful, and through the test of chemical and electrochemical properties showed that the two lithium salts have good thermal and oxidation stability. |
PDF Full Text Request