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聚丙烯酸對釩電池正極熱穩(wěn)定性和電化學性能影響的研究。
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1.四川大學 材料科學與工程學院;2.攀枝花學院

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Effect of polyacrylic acid on the thermal stability and electrochemical performance of the positive electrolyte for all-vanadium redox flow battery
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1.Department of Advanced Energy Materials,College of Materials Science and Engineering,Sichuan University;2.College of Materials Engineering,Panzhihua University,Panzhihua

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    摘要:

    通過原位熱穩(wěn)定性、紫外-可見光譜、拉曼光譜、X射線光電子能譜(XPS)、循環(huán)伏安法和充放電方法,研究了聚丙烯酸(PAA)對全釩氧化還原流電池(VRFB)正極電解液的熱穩(wěn)定性和電化學性能的影響。結(jié)果表明,PAA添加劑可以提高V(V)電解液的熱穩(wěn)定性。在室溫條件下,少量的PAA添加劑能輕微的提高正極電解液的電化學性和VRFB的能量效率。此外,以PAA添加量為3%的正極電解液組裝電池,該電池在50 ℃ 時表現(xiàn)出良好的充放電循環(huán)性能,其充電容量保持率高于沒有添加PAA的電池。

    Abstract:

    Effect of poly acrylic acid (PAA) addition on the thermal stability and electrochemical performance of the V(V) positive electrolyte for all-vanadium redox flow battery (VRFB) were investigated in this paper by ex-situ stability tests, UV–Vis spectrometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Cyclic voltammetry (CV) and charge-discharge test. The results indicate that PAA additives can improve the thermal stability of V(V) electrolyte. A small amount of PAA additives can slightly improve electrochemical performance of the positive electrolyte and the energy efficiency of the VRFB at room temperature. Besides, the cell employing the positive electrolyte solution with 3% PAA shows good cycling performance at 50 ℃, the charge capacity retention of which is higher than that of the cell without PAA during the cycling.

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侯冰雪,崔旭梅,陳云貴.聚丙烯酸對釩電池正極熱穩(wěn)定性和電化學性能影響的研究。[J].稀有金屬材料與工程,2019,48(10):3149~3154.[Hou Bingxue, Cui Xumei, Chen Yungui. Effect of polyacrylic acid on the thermal stability and electrochemical performance of the positive electrolyte for all-vanadium redox flow battery[J]. Rare Metal Materials and Engineering,2019,48(10):3149~3154.]
DOI：10.12442/j. issn.1002-185X.20180403

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  • 收稿日期:2018-04-19
  • 最后修改日期:2018-07-17
  • 錄用日期:2018-07-27
  • 在線發(fā)布日期: 2019-11-01
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