| 滴加速率对TiO2/RGO复合材料结构和储钠性能的影响 |
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| 引用本文： | 杨绍斌,张琴,沈丁,董伟,刘超.滴加速率对TiO2/RGO复合材料结构和储钠性能的影响[J].材料导报,2017,31(10):1-5. |
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| 作者姓名： | 杨绍斌 张琴 沈丁 董伟 刘超 |
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| 作者单位： | 辽宁工程技术大学材料科学与工程学院,阜新,123000 |
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| 摘 要： | 以钛酸丁酯为前驱物,无水乙醇为溶剂,采用溶胶-凝胶法和热处理法制备了钠离子电池TiO_2/还原氧化石墨烯复合负极材料(TiO_2/RGO),研究了溶胶-凝胶法过程中反应物钛酸丁酯滴加速率对TiO_2/RGO复合材料形貌结构及储钠性能的影响。结果表明,TiO_2/RGO复合材料由锐钛矿相TiO_2和还原氧化石墨烯组成,TiO_2富集在RGO片层边缘。电化学测试结果表明,随着滴加速率的增大,首次放电比容量和库伦效率呈现先增大后减小的趋势;当滴加速率为1.0mL/min时,TiO_2/RGO复合材料具有良好的储钠性能,在1C(1C=20mA·g~(-1))倍率下首次放电比容量和库伦效率分别为140.14mAh·g~(-1)和27.92%,具有良好的循环和倍率性能。
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| 关 键 词： | 钠离子电池 还原氧化石墨烯 二氧化钛 电性能 滴加速率 |
Effect of Feeding Rate on the Structure and Storage Properties of TiO2/RGO Composites |
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| YANG Shaobin,ZHANG Qin,SHEN Ding,DONG Wei and LIU Chao.Effect of Feeding Rate on the Structure and Storage Properties of TiO2/RGO Composites[J].Materials Review,2017,31(10):1-5. |
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| Authors: | YANG Shaobin ZHANG Qin SHEN Ding DONG Wei and LIU Chao |
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| Affiliation: | College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000,College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000,College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000,College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000 and College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000 |
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| Abstract: | With ethanol as solvent and Ti(OBu)4 as precursor,the process for preparing TiO2/reduced graphene oxide composite (TiO2/RGO) by sol-gel method and heat treatment was studied.The effect of Ti(OBu)4 feeding rate on the morphology,structure and storage properties of TiO2/RGO in the sol-gel process was studied.Results showed that the TiO2/RGO composite was composed of anatase TiO2 and reduced graphene oxide,and TiO2 concentrated at the edge of the RGO layer.Electrochemical test results showed that the initial discharge capacity and coulombic efficiency increased first and then decreased with the increase of cycle times.When the feeding rate is 1.0 mL/min,the TiO2/RG,-O composites possessed good performance of sodium storage,as the ini tial discharge capacity and initial coulombic efficiency were 140.14 mAh · g-1 and 27.92％ at a current rate of 1C (1C=20 mA ·g-1),as well as good cycle and rate performance. |
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| Keywords: | sodium ion battery reduced graphene oxide titanium dioxide electric performance feeding rate |
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