Understanding of the capacity Contribution of carbon in phosphorus-carbon composites for high-performance anodes in lithium ion batteries

Phosphorus has recently received extensive attention as a promising anode for lithium ion batteries （LIBs） due to its high theoretical capacity of 2,596 mAh·g^-1. To develop high-performance phosphorus anodes for LIBs, carbon materials have been hybridized with phosphorus （P-C） to improve dispersion...

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Published in:Nano research 2017-04, Vol.10 (4), p.1268-1281
Main Authors: Xu, Jiantie, Jeon, In-Yup, Ma, Jianmin, Dou, Yuhai, Kim, Seok-Jin, Seo, Jeong-Min, Liu, Huakun, Dou, Shixue, Baek, Jong-Beom, Dai, Liming
Format: Article
Language:English
Subjects:
Anodes
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Carbon
Chemistry and Materials Science
Condensed Matter Physics
Cycles
Electrochemical analysis
Electrochemistry
Electrode materials
Hybridization
Lithium
Lithium-ion batteries
Mass ratios
Materials Science
Nanotechnology
Phosphorus
Rechargeable batteries
Research Article
Specific capacity
Synergistic effect
Voltage
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Summary:Phosphorus has recently received extensive attention as a promising anode for lithium ion batteries （LIBs） due to its high theoretical capacity of 2,596 mAh·g^-1. To develop high-performance phosphorus anodes for LIBs, carbon materials have been hybridized with phosphorus （P-C） to improve dispersion and con- ductivity. However, the specific capacity, rate capability, and cycling stability of P-C anodes are still less than satisfactory for practical applications. Furthermore, the exact effects of the carbon support on the electrochemical performance of the P-C anodes are not fully understood. Herein, a series of xP-yC anode materials for LIBs were prepared by a simple and efficient ball-milling method. 6P-4C and 3P-7C were found to be optimum mass ratios of x/y, and delivered initial discharge capacities of 1,803.5 and 1,585.3-mAh·g^-1, respectively, at 0.1 C in the voltage range 0.02-2 V, with an initial capacity retention of 68.3% over 200 cycles （more than 4 months cycling life） and 40.8% over 450 cycles. The excellent electrochemical performance of the 6P-4C and 3P-7C samples was attributed to a synergistic effect from both the adsorbed P and carbon.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-016-1383-4