Abstract Herein, we demonstrated a facile sonochemical preparation of manganese hexacyanoferrate (Mn-HCF) and examined its use as an intercalative-type electrode for Li-ion hybrid capacitors (LHCs). The X-ray diffraction, field-emission scanning electron microscopy, and X-ray photoelectron spectroscopic analyses revealed the formation of Mn-HCF nanocubes. The electrochemical analyses revealed the presence of ion-intercalation pseudocapacitance in the Mn-HCF electrode with a specific capacity of 81.59 mAh g−1. In the view of practical applications, we designed a Mn-HCF∥graphene LHC which delivered a high specific capacitance (79.52 F g−1) and energy density (44.18 Wh kg−1), respectively. Overall, our results highlight the significance of Mn-HCF towards cost-effective energy storage devices.

中文翻译：

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使用六氰基铁酸锰纳米立方体和石墨烯电极制备高能锂离子混合电容器

摘要在此，我们展示了六氰基铁酸锰 (Mn-HCF) 的一种简便的声化学制备方法，并研究了其作为锂离子混合电容器 (LHC) 的嵌入型电极的用途。X 射线衍射、场发射扫描电子显微镜和 X 射线光电子能谱分析揭示了 Mn-HCF 纳米立方体的形成。电化学分析表明，Mn-HCF 电极中存在离子嵌入赝电容，比容量为 81.59 mAh g-1。从实际应用的角度来看，我们设计了一种Mn-HCF∥石墨烯LHC，它分别提供了高比电容（79.52 F g-1）和能量密度（44.18 Wh kg-1）。总的来说，我们的结果强调了 Mn-HCF 对具有成本效益的储能设备的重要性。