Spray-Drying Synthesis of LiFeBO 3 /C Hollow Spheres With Improved Electrochemical and Storage Performances for Li-Ion Batteries

LiFeBO /C cathode material with hollow sphere architecture is successfully synthesized by a spray-drying method. SEM and TEM results demonstrate that the micro-sized LiFeBO /C hollow spheres consist of LiFeBO @C particles and the average size of LiFeBO @C particles is around 50-100 nm. The thickness of the amorphous carbon layer which is coated on the surface of LiFeBO nanoparticles is about 2.5 nm. LiFeBO @C particles are connected by carbon layers and formed conductive network in the LiFeBO /C hollow spheres, leading to improved electrical conductivity. Meanwhile, the hollow structure boosts the Li diffusion and the carbon layers of LiFeBO @C particles protect LiFeBO from moisture corrosion. Consequently, synthesized LiFeBO /C sample exhibits good electrochemical properties and storage performance.