Spray-Drying Synthesis of LiFeBO3/C Hollow Spheres With Improved Electrochemical and Storage Performances for Li-Ion Batteries

LiFeBO 3 /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 3 /C hollow spheres consist of LiFeBO 3 @C particles and the average size of LiFeBO 3 @C particles is around 50–100 nm. The thickness of the amorphous carbon layer which is coated on the surface of LiFeBO 3 nanoparticles is about 2.5 nm. LiFeBO 3 @C particles are connected by carbon layers and formed conductive network in the LiFeBO 3 /C hollow spheres, leading to improved electrical conductivity. Meanwhile, the hollow structure boosts the Li + diffusion and the carbon layers of LiFeBO 3 @C particles protect LiFeBO 3 from moisture corrosion. Consequently, synthesized LiFeBO 3 /C sample exhibits good electrochemical properties and storage performance.