Multifunctional polymeric coating on stainless steel current collectors in aqueous energy storage devices

IF 2.7 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Inorganica Chimica Acta Pub Date : 2024-08-30 DOI:10.1016/j.ica.2024.122341

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Abstract

Herein, low cost stainless steel foils are employed as current collectors in aqueous Na-ion supercapacitors, while the foils are coated with following conducting polymers, namely, polyimide (PI), Schiff base polymer (SBP), polyanthraquinone sulfide (PAQS) and polyaniline (PANI). The foremost purpose of these polymeric coatings is the prevention of corrosion, and the resultant improvements in device performances. Notwithstanding, these polymeric coatings provide few additional benefits in device characteristics, and these are following: (i) enhancement of electrolyte stability window, (ii) contributing charge storage capacitance, (iii) conversion of 2D pristine substrate to 3D porous current collector. The four coating polymers are electrochemically characterized, and PI is selected for fabricating Na-ion supercapacitor cells. The PI-coating reduces the stainless steel’s corrosion rate ∼ 68 times, expands the electrolyte stability window ∼ 1.2 times, and delivers ∼ 2 times higher capacitance with respect to pristine current collector, whereas no appreciable interfacial resistances are observed. The supercapacitor cell with PI-functionality demonstrates ∼ 6.6 times improved capacitance than that of pristine cell at 25 mA/g current density, while > 95 and ∼ 90 % Faradaic efficiencies are noted for former and latter, respectively. The distinct enhancement of cell performances clearly demonstrates the effectiveness of multifunctional polymeric coating on corrosion-prone metallic current collectors.

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水能储存装置中不锈钢集流器上的多功能聚合物涂层

在这里，低成本不锈钢箔被用作水性钠离子超级电容器中的电流收集器，同时在不锈钢箔上涂覆以下导电聚合物，即聚酰亚胺（PI）、席夫碱聚合物（SBP）、聚蒽醌硫化物（PAQS）和聚苯胺（PANI）。这些聚合物涂层的首要目的是防止腐蚀，从而提高设备性能。尽管如此，这些聚合物涂层还能为设备特性带来一些额外的好处，具体如下：(i) 增强电解液稳定性窗口；(ii) 提高电荷存储电容；(iii) 将二维原始基底转化为三维多孔集流器。对四种涂层聚合物进行了电化学表征，并选择 PI 用于制造钠离子超级电容器电池。PI 涂层使不锈钢的腐蚀率降低了 68 倍，电解液稳定性窗口扩大了 1.2 倍，电容比原始集电体高出 2 倍，同时没有观察到明显的界面电阻。在 25 mA/g 电流密度下，具有 PI 功能的超级电容器电池的电容比原始电池提高了 6.6 倍，而前者和后者的法拉第效率分别为 95% 和 90%。电池性能的显著提高清楚地表明了多功能聚合物涂层在易腐蚀金属集电器上的有效性。

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来源期刊

Inorganica Chimica Acta 化学-无机化学与核化学

CiteScore

6.00

自引率

3.60%

发文量

440

审稿时长

35 days

期刊介绍： Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews. Topics covered include: • chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies; • synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs); • reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models; • applications of inorganic compounds, metallodrugs and molecule-based materials. Papers composed primarily of structural reports will typically not be considered for publication.