Journal
APPLIED SURFACE SCIENCE
Volume 485, Issue -, Pages 413-422Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.04.145
Keywords
Bimetal phosphide; Metal-organic frameworks; Nitrogen-doped graphene; Anode; Lithium-ion batteries
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Funding
- National Natural Science Foundation of China [11705015]
- Natural Science Foundation of Jiangsu Educational Department [15KJA430001]
- Foundation of Jiangsu Science and Technology Department [BA2016041]
- Science and Technology Plan Project of Suzhou [SYG201738, SZS201710]
- Scientific Research Foundation of University [XZ1628]
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Transition metal phosphides (TMPs) have attracted much considerable interest for electrochemical energy storage, due to their high theoretical capacity and earth-abundant. In this work, we report ultrafine carbon-coated bimetal phosphide nanoparticles embedded into the nitrogen-doped graphene network (NGN) through a solution-phase self-assembly strategy. The unique carbon-coated Ni1.4Co0.6P nanoparticles and strongly coupled with NGN can not only provide more active sites for lithium-ions reaction and enhance the conductivity of electrode, but also restrain the volume expansion during the charge/discharge process. When evaluated as anode material for lithium-ion batteries, the as-prepared hybrid electrode exhibits high specific capacities (1320 mAh g(-1) at 120 mA g(-1)), superior rate capability (227 mAh g(-1) at a current density of 3000 mA g(-1)) and excellent cycling stability (350 mAh g at 1200 mA g(-1) after 1000 cycles). This work can be extended to develop advanced electrode materials for next-generation energy storage systems.
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