Effect of anionic, cationic and non-ionic surfactants with NaF as binary additives on the performance of soluble lead redox flow battery
Effect of anionic, cationic and non-ionic surfactants with NaF as binary additives on the performance of soluble lead redox flow battery
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以NaF为二元添加剂的阴离子、阳离子和非离子表面活性剂对可溶性铅氧化还原液流电池性能的影响
DOI：
10.1016/j.electacta.2022.141767
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发表时间：
2023
影响因子：
6.6
通讯作者：
Rathod S
中科院分区：
文献类型：
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作者：
Rathod S
采用场发射扫描电子显微镜（FESEM）和多种电化学技术研究了以木质素磺酸钠为阴离子、十六烷基三甲基铵-甲苯磺酸盐（HDTMAp-TS）为阳离子、Triton X-100为非离子表面活性剂沿着NaF作为二元添加剂对可溶性铅液流电池（SLRFB）性能的影响。FESEM研究表明，阳离子表面活性剂与NaF联用时，PbO 2沉积物的结构形态没有明显变化，而木质素磺酸钠和Triton X-100与NaF联用时，阴极沉积物的形态发生了明显变化。场发射扫描电镜研究表明，阳离子表面活性剂与氟化钠促进铅矿床的顺利和横向增长。循环伏安法和动力学研究表明，添加NaF到阴离子表面活性剂是有害的，而它被发现是有益的与阳离子和非离子表面活性剂。恒流充放电循环研究表明，当以20 mA cm− 2电流密度充电和以相同电流密度放电至0.8 V时，具有原始电解质、阴离子表面活性剂沿着NaF、Triton X-100沿着NaF添加剂的电池分别显示出25、75和25次循环的循环寿命。有趣的是，具有NaF的阳离子表面活性剂显示出超过1350次循环的循环寿命，而没有任何维护，在类似条件下性能没有劣化。据我们所知，这是SLRFB系统在没有任何维护的情况下证明的最高循环寿命。阳离子表面活性剂在控制铅枝晶形成的有益作用的机制的见解进行了讨论。
The effect of adding sodium lignosulfonate as anionic, hexadecyltrimethylammoniump-toluene sulfonate (HDTMAp-TS) as cationic, or Triton X-100 as non-ionic surfactant along with NaF into the electrolyte as binary additives on the performance behaviour of a soluble lead redox flow battery (SLRFB) is studied by Field Emission Scanning Electron Microscopy (FESEM) and various electrochemical techniques. The FESEM studies show no significant change in the structural morphology of PbO2deposits in the case of cationic surfactant in conjunction with NaF, whereas sodium lignosulfonate and Triton X-100 in conjunction with NaF show significant changes in the morphology of cathode deposits. FESEM studies reveal that cationic surfactant with NaF facilitates the smooth and lateral growth of Pb deposits. Cyclic voltammetry and kinetic studies show that adding NaF to anionic surfactant is detrimental, while it is found to be beneficial with cationic and non-ionic surfactants. The constant current charge and discharge cycling studies show that cells with pristine electrolyte, anionic surfactant along with NaF, Triton X-100 along with NaF additives show a cycle-life of 25, 75, and 25 cycles, respectively, when charged at 20 mA cm−2current density and discharged to 0.8 V at the same current density. Interestingly, the cationic surfactant with NaF exhibits a cycle-life of more than 1350 cycles without any maintenance with no deterioration in the performance under similar conditions. To the best of our knowledge, this is the highest cycle-life demonstrated for SLRFB system without any maintenance. Mechanistic insights for the beneficial role of cationic surfactant in controlling Pb dendrite formation are discussed.