Journal
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
Volume 34, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.201600315
Keywords
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Funding
- Fundamental Research Funds for the Central Universities [2015XKZD01]
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Graphene-based phosphorus-doped carbon (GPC) is prepared through a facile and scalable thermal annealing method by triphenylphosphine and graphite oxide as precursor. The P atoms are successfully doped into few layer graphene with two forms of P-O and P-C bands. The GPC used as anode material for Na-ion batteries delivers a high charge capacity 284.8 mAh g(-1) at a current density of 50 mA g(-1) after 60 cycles. Superior cycling performance is also shown at high charge-discharge rate: a stable charge capacity 145.6 mAh g(-1) can be achieved at the current density of 500 mA g(-1) after 600 cycles. The result demonstrates that the GPC electrode exhibits good electrochemical performance (higher reversible charge capacity, super rate capability, and long-term cycling stability). The excellent electrochemical performance originated from the large interlayer distance, large amount of defects, vacancies, and active site caused by P atoms doping. The relationship of P atoms doping amount with the Na storage properties is also discussed. This superior sodium storage performance of GPC makes it as a promising alternative anode material for sodium-ion batteries.
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