B／P共掺杂呋喃树脂炭用作锂离子电池负极材料的研究  

ANODE PROPERTY OF BORON AND PHOSPHORUS CODOPED FURAN RESIN PYROLYSIS CARBONS FOR RECHARGEABLE LITHIUM-ION BATTERIES

作　　者：林珍艳[1] 张红波[1] 邓朝勇[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《炭素》2013年第1期20-24,共5页Carbon

摘　　要：以添加8wt％磷酸的呋喃树脂为前驱体，经固化后混入不同含量的硼酸，升温至8500C炭化制得B／P共掺杂树脂裂解炭。采用热重分析考察固化后树脂的热失重，采用XRD和氮气物理吸附分别考察物相、微晶结构变化以及比表面积和孔结构的变化，同时采用恒流充放电技术对其充放电性能进行了研究。结果表明，B／P共掺杂使裂解炭的比表面积明显下降，孔洞数量减少，且随着B／P的增加，裂解炭中BPO4的含量增加；当B：P（at％：at％）=1．0时，树脂裂解炭的电化学性能得到了有效改善，首次可逆容量高达378．2mAh／g，较磷掺杂树脂裂解炭提高～30mAh／g，且循环50次后可逆容量保持率为86．8％。Boron and phosphorus codoping furan resin pyrolytic carbons were fabricated via curing furan resin containing 8 wt% phosphoric acid, followed by mixed with different contents of boric acid and subsequently carbonized at 850℃ . Thermogravimetrie analysis was adopted to investigate the thermogravimetric loss of cured furan resin. The phase composition, microstructure, BET surface area and pore structure of furan resin pyrolytic carbons were investigated by XRD, Nitrogen physical adsorption. Electrochemical behaviors were studied by galvanostatic charge-discharge test. The results indicate that the boron and phosphorus codoping furan resin pyrolytic carbons decrease in BET surface area and pore volume, while the content of boron phosphate increases as the atomic ratio of B/P increases. The anode property of furan resin pyrolytic carbon is effectively improved when the atomic ratio of B/P is 1.0, which shows the highest reversible capacity （378.2 mAh/g） at the first cycle, about 30 mAh/g higher than boron free sample, and the highest capacity retention （86.8%） after 50 cycles. It is attributed to the improvement of pore structure and reasonable amount of boron phosphate.

关 键 词：B P共掺杂 呋喃树脂裂解炭 负极材料 BPO4 

分 类 号：TM912.9[电气工程—电力电子与电力传动]