Abstract We report on the in-situ chemical growth of unique core-shell quantum dots (QDs) with single layer graphene on the surface of CuO QDs and their structural, optical and electrical properties. The CuO/graphene QDs were synthesized through a simple and hydrothermal technique. In order to enhance performance electrochemical energy storages, we have developed core (active material)/shell (conductive material) type CuO/graphene QDs as electrode materials using the combined electrolytes (KOH + LiCl). As a result, the performance of electrochemical energy storages exhibits specific capacitance of 154 F g−1 at current density of 1 A g−1 and cycling stability with 84% capacitance retention after 3,000 cycles.

中文翻译：

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用于电化学应用的 CuO/石墨烯（核/壳）量子点的合成和表征

摘要 我们报告了在 CuO QD 表面具有单层石墨烯的独特核壳量子点 (QD) 的原位化学生长及其结构、光学和电学特性。CuO/石墨烯量子点是通过简单的水热技术合成的。为了提高电化学储能的性能，我们开发了核（活性材料）/壳（导电材料）型 CuO/石墨烯 QDs 作为使用组合电解质（KOH + LiCl）的电极材料。因此，电化学储能的性能在 1 A g-1 的电流密度下表现出 154 F g-1 的比电容和循环稳定性，3,000 次循环后电容保持率为 84%。