Soft carbon-coated hard carbon beads as a lithium-ion battery anode material

Thermal vapor decomposition (TVD) process has been applied to coat soft carbon onto the surface of hard carbon beads. The resultant spherical hard-soft carbon composites with core-shell structure demonstrate better electrochemical performance than the starting hard carbon beads as anode materials in lithium-ion batteries. The effect of TVD-carbon shell on the electrochemical performance was correlated with some physical properties.