Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 25, Pages 22364-22370Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b04774
Keywords
FeP/C; anode material; KIBs; high-energy ball-milling method; electrochemical performance; DFT calculations
Funding
- National Key Research and Development Program [2016YFB0901703]
- Beijing Municipal Science and Technology Commission [Z181100004718006]
- National Natural Science Foundation of China [U1664256, 51474133]
- China-US Electric Vehicle Project [S2016G9004]
- National Key Project on Fundamental Research Program [2015CB251104]
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Owing to their natural abundance, the low potential, and the low cost of potassium, potassium-ion batteries are regarded as one of the alternatives to lithium-ion batteries. In this work, we successfully fabricated a FeP/C composite, a novel electrode material for PIBs, through a simple and productive high-energy ball-milling method. The electrode delivers a reversible capacity of 288.9 mA.h.g(-1) (2nd) at a discharge rate of 50 mA g(-1), which can meet the future energy storage requirements. Density functional theory calculations suggest a lower diffusion barrier energy of K+ than Na+, which allows faster K+ diffusion in FeP.
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