Optimization of suitable electrode material flashing high electrochemical performance is the main hindrance in energy storage applications. Metal oxide-based electrode materials are promising candidate which greatly promotes the sustainable development. Herein, strontium oxide (SrO) is synthesized from sonochemical method followed by calcination. Incorporating polyaniline (PANI) and graphene (Gr) intensify the materials performance. Three asymmetric devices are designed using SrO, its composites (SrO/PANI and SrO/PANI/Gr) and activated carbon (AC) as an electrode and electrolyte-soaked separators are sandwiched in solidly packed cell assembly. Electrochemical measurements are performed to scrutinize the inherent properties. After that, Dunn’s model is applied to evaluate the capacitive and diffusion-controlled contributions. The obtained result divulges that SrO/PANI/Gr//AC exhibits more diffusive-controlled contribution and reveals a battery type behavior due to the contribution of PANI in redox reactions. Thus, this work delivers a route to synthesize metal oxides-based composites and a systematic approach to analyze the charge storage mechanism in asymmetric supercapacitors.

合适的电极材料具有高电化学性能的优化是储能应用中的主要障碍。基于金属氧化物的电极材料是有希望的候选物，其极大地促进了可持续发展。在此，氧化锶（SrO）是通过声化学法接着煅烧而合成的。加入聚苯胺（PANI）和石墨烯（Gr）可增强材料性能。使用SrO设计了三个不对称器件，其复合材料（SrO / PANI和SrO / PANI / Gr）和活性炭（AC）作为电极，并且电解质浸泡的隔膜夹在固体包装的电池组件中。进行电化学测量以检查固有性质。之后，将邓恩模型应用于评估电容和扩散控制的贡献。所得结果表明，SrO / PANI / Gr // AC表现出更多的扩散控制贡献，并且由于PANI在氧化还原反应中的贡献而揭示了电池类型的行为。因此，这项工作为合成基于金属氧化物的复合材料提供了一条途径，并为分析不对称超级电容器中的电荷存储机理提供了一种系统的方法。