High-energy lithium-ion battery 'double modified anode materials synthesis

Three yuan rich nickel anode materials, because of the high irreversible capacity, low cost advantages, is considered to be the most ideal one of the next generation of high energy density lithium ion power battery cathode material. Interface, however, poor stability, the structure of the secondary particles inside a recession, a serious impediment to the large-scale application of the anode materials.

recently, changsha university of science and technology, associate professor Li Ling are, and xiamen university's zhangqiao bao, lu argonne national laboratory, university of Nebraska at Lincoln professor at home and abroad, and brookhaven national laboratory and the team completed a work, guided by first principles calculation, synchronous synthesized lithium oxide coated titanium doping, lanthanum nickel & other; Double decoration & throughout; Ternary rich nickel anode materials. This simple and efficient synthetic method, is expected to significantly reduce the high performance rich nickel threshold of ternary material production. Results has been published in the international journal of advanced functional materials.

team rich in titanium and lanthanum nickel on the surface of the ternary material migration barrier, found that titanium mixed phase and lanthanum to escape to the surface status, for the system of lowest energy state is stable. They design according to the theoretical calculation results and the synchronous synthesis & other Double decoration & throughout; The rich nickel ternary material. Material showed good thermal stability, structural stability and excellent electrochemical performance. After 60 degrees centigrade high temperature cycle 150, double the capacity of the modified material retention rate, higher than that of pure phase rich nickel material for nearly twice as much. In the whole transmission X-ray microscopic imaging of cycle before/after visualization study on the anode material, team proved & other; Double decoration & throughout; Inhibits the anode material of micro cracks in the secondary particles and the micro crack propagation in the process of circulation, circulation after rich nickel material between Ni3 + the uneven distribution of secondary particles has been effectively suppressed, thus significantly increased the material structure stability of the secondary particles.

the findings for the development of three yuan rich nickel materials and application provides a new way of thinking and theoretical guidance, conduce to the development of high energy density lithium ion power battery.