Abstract Ruthenium oxide (RuO 2 ) is one of the most investigated electrode materials due to its unique characteristics, such as high reversibility and high capacitance, etc. However, it has always been tested with univalent electrolyte systems for charge storage applications. In contrast, here, for the first time , we examined electrochemical characteristics of a nanocrystalline RuO 2 using multivalent aqueous 0.5 M BeSO 4 (pH-2.2) and 0.167 M Al 2 (SO 4 ) 3 (pH-2.8) electrolytes and then compared the performance with the data obtained using a commonly investigated univalent 0.5 M H 2 SO 4 (pH-1.08) electrolyte. The asymmetric two electrode systems of RuO 2 Vs. activated carbon (AC) showed maximum capacitances of 397 (at 3.12 Ag −1 ) and 189 Fg −1 (at 3.65 Ag −1 ) with Be 2+ and Al 3+ sulfate electrolytes, respectively, reflecting both the double layer and pseudo capacitance mechanisms for charge storage. These studies present an advantage of multivalent electrolytes for RuO 2 based charge storage applications.

中文翻译：

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用于不对称超级电容器的纳米晶RuO 2 与含水多价（Be 2+ 和Al 3+ ）硫酸盐电解质的电化学表征

摘要 氧化钌（RuO 2 ）由于其独特的特性，如高可逆性和高电容等，是研究最多的电极材料之一。然而，它一直被用于电荷存储应用的单价电解质体系测试。相比之下，在这里，我们首次使用多价水性 0.5 M BeSO 4 (pH-2.2) 和 0.167 M Al 2 (SO 4 ) 3 (pH-2.8) 电解质检测了纳米晶 RuO 2 的电化学特性，然后进行了比较使用普遍研究的单价 0.5 MH 2 SO 4 (pH-1.08) 电解液获得的数据的性能。RuO 2 Vs 的不对称双电极系统。活性炭 (AC) 在使用 Be 2+ 和 Al 3+ 硫酸盐电解质时分别显示出 397 (在 3.12 Ag -1 ) 和 189 Fg -1 (在 3.65 Ag -1 ) 的最大电容，反映了电荷存储的双层和伪电容机制。这些研究展示了多价电解质在基于 RuO 2 的电荷存储应用中的优势。