锂离子电池新型树脂碳电极材料的研究

STUDY ON NEW TYPE OF RESIN CARBON ELECTRODE MATERIALS OF LITHIUM ION BATTERIES

测试分析了碳化处理条件对糠醇树脂碳化产物组成、结构和电化学性能的影响。结果表明 :6 2 0℃碳化处理的样品出现了明显尖锐的 (10 0 )晶面特征衍射峰 ,同时还发现了 (110 )和 (0 0 6 )晶面特征衍射峰 ,表明糠醇树脂是一种较易石墨化的树脂材料。碳化样品比表面积均随着处理温度升高而下降。处理气氛对碳化产物比表面积的影响表现得更为强烈。 70 0℃惰性气氛中碳化处理的样品与还原性气氛中处理的样品相比 ,比表面积降低了约 6 1.5 %。实验结果还发现 6 2 0℃～ 130 0℃范围内处理的糠醇树脂碳化样品组装的锂离子电池都表现出了相对较高的充放电容量。其中 70 0℃碳化处理的样品组装的锂离子电池充放电容量最高。实验结果还表明树脂碳化产物的比表面积是影响电池充放电性能的重要因素 ,碳化产物的比表面积越大 ,电池的充放电容量就越高。

Furfuralcohol resin were carbonized to make resin carbon materials.The elements,structure and electrochemical property of resin carbon materials were analyzed.The results found that the resin carbon materials treated at 620℃ have evidently appeared (100) crystal plane diffraction peek,at one time the (110) and (006) crystal plane diffraction peeks also appeared,it means that the furfuralcohol resin is a type of facility graphitization resin material.The specific surface of resin carbon materials declined with carbonifying treating temperature increased.The effect of treating ambience on specific surface of resin carbon material revealed more fierceness.As compared with the sample treated at 700℃ in deoxidize ambience,the specific surfaces of samples treated at 700℃ in inertia ambience drop about 61.5%.The electrochemical preformance of the lithium ion cells used the resin carbon materials as the electrodes were tested and analyzed.The charge discharge capacities of samples treated from 620℃～1300℃ revealed relatively higher.Thereinto,the capacities of sample treated at 700℃ were at top.The test results still indicated that the specific surface of the resin carbon is the important effect factor on the charge discharge capacities of battery.The bigger the specific surface of the resin carbon,the higher is the capacity of the battery.