Abstract
There have been few reports concerning the hydrothermal synthesis of silicon anode materials. In this manuscript, starting from the very cheap silica sol, we hydrothermally prepared porous silicon nanospheres in an autoclave at 180 ℃. As anode materials for lithium-ion batteries (LIBs), the as-prepared nano-silicon anode without any carbon coating delivers a high reversible specific capacity of 2, 650 mAh·g-1 at 0.36 A·g-1 and a significant cycling stability of about 950 mAh·g-1 at 3.6 A·g-1 during 500 cycles.
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