Molybdenum Oxide Electrodes for Asymmetric Supercapacitor Application: Effect of MoO3 Concentration

IF 4.3 3区工程技术 Q2 ENERGY & FUELS

International Journal of Energy Research Pub Date : 2025-05-15 DOI:10.1155/er/5626821

Sujata B. Patil, Ranjit P. Nikam, Pranav K. Katkar, Chandrakant D. Lokhande, Raghunath S. Patil

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Abstract

The low-cost, binder-free chemical bath deposition (CBD) method was utilized to deposit molybdenum oxide (MoO₃) thin films on stainless steel (SS) substrates at various concentrations of sodium molybdate (Na₂MoO₄) precursor (0.025–0.1 M) and applied as an anode for supercapacitive charge storage. The effect of precursor concentration on the physicochemical properties of electrodes was studied. The MO₃ thin films (synthesized using a 0.075 M concentration of Na₂MoO₄ precursor) exhibited mass loading of 0.56 mg cm⁻², a hexagonal crystal structure and microrod-like surface morphology. The formation of MoO₃ was proved by Raman and (Energy Dispersive X-ray Analysis) EDAX studies. The MO3 thin film showed a specific capacitance (C_s) of 958.9 F g⁻¹ at 5 mA cm⁻² current density. An aqueous asymmetric supercapacitor (ASC) device was assembled using MoO₃ as an anode and polyaniline (PANI) as a cathode. The assembled MoO₃//H₂SO₄//PANI device showed a C_s of 53.7 F g⁻¹ with an energy density (ED) of 14.4 Wh kg⁻¹ at a power density (PD) of 1.3 kW kg⁻¹ and 83.7% capacitive retention over 1500 cyclic voltammetry (CV) cycles.

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非对称超级电容器用氧化钼电极：MoO3浓度的影响

采用低成本、无粘结剂的化学浴沉积（CBD）方法，在不同浓度的钼酸钠（Na2MoO4）前驱体（0.025-0.1 M）下，在不锈钢（SS）衬底上沉积氧化钼（MoO3）薄膜，并将其用作超电容电荷存储的阳极。研究了前驱体浓度对电极理化性质的影响。采用0.075 M浓度的Na2MoO4前驱体合成的MO3薄膜具有0.56 mg cm−2的质量负载、六方晶体结构和微棒状表面形貌。通过拉曼和能量色散x射线分析（EDAX）证实了MoO3的形成。在5 mA cm−2电流密度下，MO3薄膜的比电容Cs为958.9 F g−1。以MoO3为阳极，聚苯胺（PANI）为阴极，组装了水不对称超级电容器（ASC）。组装的MoO3//H2SO4//PANI器件在功率密度（PD）为1.3 kW kg - 1时，Cs为53.7 F g - 1，能量密度（ED）为14.4 Wh kg - 1，在1500个循环伏安（CV）循环中电容保持率为83.7%。

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来源期刊

International Journal of Energy Research 工程技术-核科学技术

CiteScore

9.80

自引率

8.70%

发文量

1170

审稿时长

3.1 months

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