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Citation: Wu Yuping, Fang Shibi, Jiang Yingyan, Wan Chunrong. Effects of Dopped Phosphorus on Carbon Anodes Property[J]. Chinese Journal of Applied Chemistry, ;1998, 15(6): 37-40. shu

Effects of Dopped Phosphorus on Carbon Anodes Property

1.
Tsinghua University, Beijing 102201;
2.
Institute of Chemistry, Chinese Academy of Sciences, Beijing 102201

Received Date: 23 March 1998
Revised Date: 2 September 1998

The effects of incorporation of phosphoric acid on the carbonaceous materials have been investigated. Results of elemental analysis, XPS and XRD measurements show that phosphorus is in bond with carbon and oxygen atoms. At 600 ℃, the incorporated phosphoric acid favors the cyclization, dehydrogenation and carbonization processes and both the nitrogen content and graphene nitrogens relative contents are increased. The bondage state of phosphorus leads the interlayer distance d₀₀₂ of carbon material to increase and the reversible capacity below and above 0.9 V increase with the amount of added phosphoric acid with the total value being up to 524 mAh/g. At 1000 ℃, the carbonization degree is not much changed and the reversible capacity at about 1.0 V increases as a result of the incorporation of phosphorus atoms.
- lithium ion secondary battery,
- carbon anode,
- phosphorus incorporation
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