Electrode material has been cited as one of the most important determining factors in classifying an energy storage system’s charge storage mechanism, i.e., as battery-type or supercapacitive-type. In this paper, we show that along with the electrode material, the electrolyte also plays a role in determining the charge storage behaviour of the system. For the purpose of our research, we chose multi-elemental spinal type CuMn₂O₄ metal oxide nanofibers to prove the hypothesis. The material is synthesized as nanofibers of diameter ~ 120 to 150 nm in large scales by a pilot scale electrospinning set up. It was then tested in three different electrolytes (1 M KOH, 1 M Na₂SO₄ and 1 M Li₂SO₄), two of which are neutral and the third is alkaline (KOH). The cyclic voltammograms and the galvanostatic charge–discharge of the electrode material in a three-electrode system measurement showed that it exhibit different charge storage mechanism in different electrolyte solutions. For the neutral electrolytes, a capacitive behaviour was observed whereas a battery-type behaviour was seen for the alkaline electrolyte. This leads us to conclude that the charge storage mechanism, along with the active material, also depends on the electrolyte used.

在对储能系统的电荷存储机制进行分类时，电极材料已被列为最重要的决定因素之一，即电池类型或超级电容类型。在本文中，我们表明电解质与电极材料一起在确定系统的电荷存储行为中也起着作用。为了我们的研究目的，我们选择了多元素脊柱型CuMn ₂ O ₄金属氧化物纳米纤维来证明这一假设。通过中试规模的电纺丝装置，该材料被大规模合成为直径约为120至150 nm的纳米纤维。然后在三种不同的电解质（1 M KOH，1 M Na ₂ SO ₄和1 M Li ₂ SO ₄），其中两个是中性的，第三个是碱性的（KOH）。三电极系统测量中电极材料的循环伏安图和恒电流充放电表明，它在不同的电解质溶液中表现出不同的电荷存储机理。对于中性电解质，观察到了电容行为，而对于碱性电解质，观察到了电池型行为。这使我们得出结论，电荷存储机制与活性材料一起还取决于所使用的电解质。