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鋰硫電池正極材料Al-ABTC/RGO@S的制備及電化學(xué)性能
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西安建筑科技大學(xué)機(jī)電工程學(xué)院 陜西省納米材料與技術(shù)重點實驗室

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陜西省自然科學(xué)基金(no.2018GY-166,2019TD-019,2019TSLGY04-01),西安自然科學(xué)基金(201805033YD11CG17(7))和西安市清潔能源重點實驗室(no.2019219914SYS014CG036)支持項目。


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:

    通過溶劑熱法制備了一種高比表面積的鋁基金屬有機(jī)框架（metal organic frameworks，MOFs）材料Al-ABTC。然后通過靜電吸附法將Al-ABTC與氧化石墨烯（GO）復(fù)合，并載硫得到Al-ABTC/RGO@S復(fù)合材料用于鋰硫電池。采用 X 射線衍射(XRD)分析了Al-ABTC的晶體結(jié)構(gòu)，采用掃描電鏡(SEM)對Al-ABTC、Al-ABTC/GO和Al-ABTC/RGO@S的八面體形貌進(jìn)行表征，用恒流充放電測試材料的電化學(xué)性能。結(jié)果表明，Al-ABTC/RGO@S復(fù)合電極在0.2 C電流密度下的首次放電容量達(dá)到1345.3 mAh g-1，經(jīng)過200次的循環(huán)以后還能達(dá)到406.4 mAh g-1的比容量，其平均庫倫效率為99.1%。此外電池即使在2 C下，首次放電比容量高達(dá)714.7 mAh g-1，經(jīng)過300次循環(huán)以后容量保持在331 mAh g-1，表現(xiàn)出良好的長循環(huán)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.鋰硫電池正極材料Al-ABTC/RGO@S的制備及電化學(xué)性能[J].稀有金屬材料與工程,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
  • 錄用日期:2021-04-15
  • 在線發(fā)布日期: 2022-02-09
  • 出版日期: 2022-01-28