One-pot fabrication of graphene sheets decorated Co2P-Co hollow nanospheres for advanced lithium ion battery anodes

The fabrication of Co2P-Co (Co-P composites) hollow nanospheres with graphene sheets decoration through one-pot solution approach is demonstrated and their potential as the anode materials for lithium ion batteries is assessed. A large specific capacity of 929 mA h g(1) can be retained for Co-P/graphene nanocomposites at 100 mAg(1) after 200 cycles. When cycled at a large current density of 2.0C, the Co-P/ graphene nanocomposites deliver a decent reversible capacity of 567 mA h g(1), which is much higher than the theoretical capacity of traditional graphite anode (372 mAh g 1). The obviously enhanced lithium storage properties of Co-P/graphene nanocomposites are put down to the dual modification of graphene sheets and metal Co as well as their hollow structures. (C) 2017 Elsevier Ltd. All rights reserved.