The formation of yolk–shell structured NiO nanospheres with enhanced lithium storage capacity

摘要: NiO has been widely applied as an anode material for lithium-ion batteries (LIBs), but the weak conductivity of and serious volume expansion usually lead to poor cycling performance. Herein, we report synthesis well-crystallized yolk–shell structured nanospheres (NiO-30) through direct pyrolysis Ni coordination polymers (Ni-CPs). Compared commercial used LIB materials with a capacity 369 mA h g−1, resultant demonstrate twice 733 g−1 at current density 100 g−1. Furthermore, stability rate capability NiO-30 samples are much better than those NiO. The structures can improve electronic conductivity, benefit Li+ ion transport path buffer changes during lithium-insertion–extraction processes, which results in high discharge capacity, good performance capability.