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锂硫电池正极材料Al-ABTC/RGO@S的制备及电化学性能
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西安建筑科技大学机电工程学院 陕西省纳米材料与技术重点实验室

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陕西省自然科学基金(no.2018GY-166,2019TD-019,2019TSLGY04-01),西安自然科学基金(201805033YD11CG17(7))和西安市清洁能源重点实验室(no.2019219914SYS014CG036)支持项目。


Preparation and electrochemical performance of Al-ABTC/RGO@S as cathode material for lithium-sulfur battery
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Shanxi Key Laboratory of Nanomaterials and Nanotechnology,School of Mechanical and Electrical Engineering,Xi’an University of Architecture and Technology

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    摘要:

    通过溶剂热法制备了一种高比表面积的铝基金属有机框架(metal organic frameworks,MOFs)材料Al-ABTC。然后通过静电吸附法将Al-ABTC与氧化石墨烯(GO)复合,并载硫得到Al-ABTC/RGO@S复合材料用于锂硫电池。采用 X 射线衍射(XRD)分析了Al-ABTC的晶体结构,采用扫描电镜(SEM)对Al-ABTC、Al-ABTC/GO和Al-ABTC/RGO@S的八面体形貌进行表征,用恒流充放电测试材料的电化学性能。结果表明,Al-ABTC/RGO@S复合电极在0.2 C电流密度下的首次放电容量达到1345.3 mAh g-1,经过200次的循环以后还能达到406.4 mAh g-1的比容量,其平均库伦效率为99.1%。此外电池即使在2 C下,首次放电比容量高达714.7 mAh g-1,经过300次循环以后容量保持在331 mAh g-1,表现出良好的长循环性能。

    Abstract:

    A high specific surface area Al-based metal organic frameworks (MOFs) material Al-ABTC was prepared by hydrothermal synthesis. Then the Al-ABTC and graphene oxide (GO) were compounded by electrostatic adsorption method, and sulfur was loaded to obtain Al-ABTC/RGO@S composite material for lithium-sulfur battery. The crystal structure of Al-ABTC was analyzed by X-ray diffraction (XRD), the octahedral morphology of Al-ABTC, Al-ABTC/GO and Al-ABTC/RGO@S was characterized by scanning electron microscope (SEM), and the electrochemical performance of the material was tested by constant current charge and discharge. The results show that the initial discharge capacity of the Al-ABTC/RGO@S composite electrode reaches 1345.3 mAh g-1 at 0.2 C rate, decayes to 406.4 mAh g-1 after 200 cycles, and the average coulombic efficiency is 99.1%. In addition, even at 2 C, an initial reversible capacity of 714.7 mAh g-1 was received and a capacity of 331 mAh g-1 after 300 cycles, showing an excellent long-term cycling performance.

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王鑫,王娟.锂硫电池正极材料Al-ABTC/RGO@S的制备及电化学性能[J].稀有金属材料与工程,2022,51(1):190~196.[Wang Xin, Wang Juan. Preparation and electrochemical performance of Al-ABTC/RGO@S as cathode material for lithium-sulfur battery[J]. Rare Metal Materials and Engineering,2022,51(1):190~196.]
DOI:10.12442/j. issn.1002-185X.20210023

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  • 收稿日期:2021-01-09
  • 最后修改日期:2021-04-02
  • 录用日期:2021-04-15
  • 在线发布日期: 2022-02-09
  • 出版日期: 2022-01-28