Abstract
Composite materials, obtained by depositing sub-micron size particles of SnCu x and SnSb x on the surface of carbonaceous mesophase spherules (CMS), can endure the large volume effect of alloy host for lithium insertion and extraction. The alloy/C composites deliver large reversible capacities (430 mAh g −1 for SnSb x /CMS, 390 mAh g −1 for SnCu x /CMS); the capacity retention at the 30th cycle is 90% for SnSb x /CMS and 95.2% for SnCu x /CMS, respectively. They are promising anode materials for lithium-ion batteries.
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