| 三维交联石墨烯纳米纤维的合成及储锂性能 |
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| 引用本文： | 计天溢,刘晓旭,赵九蓬,李垚. 三维交联石墨烯纳米纤维的合成及储锂性能[J]. 高等学校化学学报, 2020, 41(4): 821-828. DOI: 10.7503/cjcu20190581 |
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| 作者姓名： | 计天溢 刘晓旭 赵九蓬 李垚 |
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| 作者单位： | 1. 陕西科技大学材料科学与工程学院, 陕西省无机材料绿色制备与功能化重点实验室, 西安 710021;2. 黑龙江科技大学矿业工程学院, 哈尔滨 150022;3. 哈尔滨工业大学化工与化学学院, 哈尔滨 150001;4. 哈尔滨工业大学复合材料与结构研究所, 哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金(批准号:51761135123);中国博士后科学基金(批准号:2018M630339);黑龙江省大学生创新创业计划项目(批准号:201810219033)资助. |
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| 摘 要： | 以氧化石墨烯为原料,高温下自组装得到高结晶的三维交联石墨烯纳米纤维.扫描电子显微镜和透射电子显微镜观测结果表明,三维石墨烯纳米纤维为实心结构,直径小于100 nm,石墨烯片层有序排列卷曲,具有较高的结晶度.电化学性能研究结果表明,该纳米纤维作为锂离子电池负极材料时,展现出较高的首次库仑效率(72. 4%)与储锂容量(0. 1C倍率下容量为692. 7 m A·h/g)、良好的倍率性能(20C倍率下容量为373. 3 m A·h/g)及优异的循环稳定性(1000次循环后容量保持率为84. 1%).
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| 关 键 词： | 三维交联石墨烯 纳米纤维 锂离子电池 |
| 收稿时间： | 2019-11-11 |
Synthesis and Lithium-storage Characteristics of Three-dimensional Cross-linked Graphene Nanofibers |
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| JI Tianyi,LI. Synthesis and Lithium-storage Characteristics of Three-dimensional Cross-linked Graphene Nanofibers[J]. Chemical Research In Chinese Universities, 2020, 41(4): 821-828. DOI: 10.7503/cjcu20190581 |
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| Authors: | JI Tianyi LI |
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| Affiliation: | (School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science and Technology,Xi’an 710021,China;College of Mining Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China;Institute of Composite Materials and Structures,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | High crystalline 3D cross-linked graphene nanofibers(3DCGNs)were self-assembled from graphene oxide at high temperature.SEM and TEM tests show that the 3DCGNs have solid-core structure with a diameter less than 100 nm.The layers of graphene are arranged in order,with higher crystallinity.The material served as a negative electrode for lithium ion battery and exhibited excellent electrochemical properties,such as high first Coulombic efficiency(72.4%)and storage lithium capacity(692.7 mA·h/g at 0.1C),good rating performance(373.3 mA·h/g at 20C)and outstanding cycling stability(capacity retention of 84.1%after 1000 cycles)and so on.This research also adds new ideas for the preparation of graphene-based electrode materials. |
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| Keywords: | 3D cross-linked graphene Nanofibers Lithium ion battery |
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