| 基于生物质的高度有序的管状碳材料及其在锂硫电池中的应用 |
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| 引用本文： | 张梦源,游小龙,刘丽君,Maru Dessie Walle,李亚娟,刘又年.基于生物质的高度有序的管状碳材料及其在锂硫电池中的应用[J].无机化学学报,2019,35(8):1493-1499. |
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| 作者姓名： | 张梦源 游小龙 刘丽君 Maru Dessie Walle 李亚娟 刘又年 |
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| 作者单位： | 中南大学化学化工学院;中南大学湖南省化学电源重点实验室 |
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| 基金项目： | 国家自然科学基金（No.21676304）、湖南省科技计划项目（No.2017TP1001）和中南大学师生共创项目（No.2017gczd007）资助。#共同第一作者。 |
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| 摘 要： | 将棕榈纤维经过炭化和氢氧化钾活化制备高度有序的管状碳材料(OCT),并且将其应用于锂硫电池。所制备的OCT具备高的比表面积和大的孔体积,可以有效地储存硫,合成方法简单且成本较低。同时,所制备的S@OCT复合物呈现出优异的电化学性能。载硫量为65%(w/w)的S@OCT复合材料在0.2C(1C=1 672 mA·g-1)的倍率下库伦效率接近于100%,其首圈容量高达1 255.2 mAh·g-1(1.8 mAh·cm-2),并且100圈后容量保持在756.9 mAh·g-1(1.09 mAh·cm-2)。使用5C的大电流测试时,其首圈容量达到了649.1 mAh·g-1(0.93 mAh·cm-2),且在100圈后容量保持在504.2 mAh·g-1(0.72 mAh·cm-2)。
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| 关 键 词： | 锂电池 硫电极 生物质 碳材料 高库伦效率 |
| 收稿时间： | 2019/3/11 0:00:00 |
| 修稿时间： | 2019/6/9 0:00:00 |
Biomass Derived Highly-Ordered Carbon Tube as Cathode Material for High Performance Lithium-Sulfur Batteries |
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| ZHANG Meng-Yuan,YOU Xiao-Long,LIU Li-Jun,Maru Dessie Walle,LI Ya-Juan and LIU You-Nian.Biomass Derived Highly-Ordered Carbon Tube as Cathode Material for High Performance Lithium-Sulfur Batteries[J].Chinese Journal of Inorganic Chemistry,2019,35(8):1493-1499. |
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| Authors: | ZHANG Meng-Yuan YOU Xiao-Long LIU Li-Jun Maru Dessie Walle LI Ya-Juan and LIU You-Nian |
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| Institution: | 1 College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha 410083, China,1 College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha 410083, China and College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha 410083, China |
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| Abstract: | A novel highly ordered carbon tube (OCT) arrays derived from palm tree fiber by carbonization and activation with KOH was prepared and used as hosts for lithium sulfur battery. The OCT possessed large specific area and pore volume, which could effectively store sulfur. The method was clean, facile and low cost. Moreover, the S@OCT composite exhibited admirable electrochemical performances. The S@OCT with 65%(w/w) sulfur delivered an initial discharge capacity of 1 255.2 mAh·g-1 (1.8 mAh·cm-2) and retained 756.9 mAh·g-1 (1.09 mAh·cm-2) at the current rate of 0.2C after 100 cycles with a high coulomb efficiency. What''s more, when tested at 5C, its initial capacity was up to 649.1 mAh·g-1 (0.93 mA h·cm-2) and retained 504.2 mAh·g1 (0.72 mAh·cm-2) after 100 cycles. |
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| Keywords: | lithium battery sulfur electrode biomass carbon materials high coulomb efficiency |
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