Optimization Study Of Lithium Titanate Battery System

Lithium titanate has excellent cycle performance,rate performance and safety,so it shows very good development prospects in the field of power batteries.At present,most researchers focus on the modification of lithium titanate materials and the gas production of lithium titanate batteries,but there are few studies on the comprehensive optimization of lithium titanate battery systems.In order to realize the industrial application of lithium titanate full battery,it is necessary to develop a full cell system with excellent performance.In order to achieve diversified applications,it is necessary to conduct an optimization study of the full cell system.In this paper,the three-electrode material and lithium titanate anode were used to select the full cell system.Through material characterization and electrochemical performance testing,NCA-LTO was found to be a superior full cell system.Through the N/P,the full cell system is divided into more detailed.It is found that the NCA-LTO full cell system has excellent overall performance when the N/P is about 0.6.At this time,the comprehensive analysis found that the optimized NCA-LTO full-cell system has the highest relative energy density and 5 C cycle retention rate,but the relative power density is not high.Therefore,by preparing high surface area activated carbon material,an energy storage mechanism nonfaradiac added supercapacitor cell system to ensure that the energy density of the battery without attenuation enhance the power density of the whole cell system.The prepared PANI-AC material has a specific surface area of 3045.4 m²/g.The material has also been found to have excellent capacitance characteristics through electrochemical performance tests.By studying the amount of activated carbon in the positive electrode material,it is proposed that 7%-8%of activated carbon can be effectively used to achieve enhance the power performance of full cell systems to ensure that the energy density in the case unattenuated.Optimized NCA-LTO full battery system by changing electrolyte.Compare 1M Li⁺Li-EMITFSI mixed ionic liquid electrolyte with traditional commercial LiPF₆electrolyte.In the case of 50 cycles at a high pressure of 3.2 V,the capacity retention of the mixed ionic liquid electrolyte is 15%higher than that of the conventional commercial LiPF₆ electrolyte.Further analysis of the battery found that the improvement of battery cycle performance is based on the high pressure decomposition of TFSI^?anion in mixed ionic liquid electrolyte.The TFSI^-anion is decomposed by high pressure to form a stable and dense solid electrolyte interphase containing SO₄^2-and SO₂^-on the surface of the positive electrode material.