Kostopoulou Athanasia, Vernardou Dimitra, Livakas Nikolaos, Brintakis Konstantinos, Daskalakis Stylianos, Stratakis Emmanuel
Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, Heraklion, 71110 Crete, Greece.
Department of Electrical & Computer Engineering, School of Engineering, Hellenic Mediterranean University, Heraklion, 710 04 Crete, Greece.
Nanoscale. 2024 Mar 28;16(13):6455-6463. doi: 10.1039/d3nr05552c.
We report that the direct conjugation of metal halide perovskite nanocrystals on rGO sheets can provide high performance and stable electrodes for Zn-ion capacitors. It is the first time that metal halide nanocrystals have been used to enhance the energy storage of 2D materials in capacitors by introducing an additional pseudocapacitance mechanism. In particular, we present a simple, rapid and room temperature laser-induced method to anchor CsPbBr nanocrystals on rGO sheets without affecting the initial morphology and crystal structure of the two components. The flexible and high surface area of the rGO sheets enables the conjugation of individual metal halide perovskite nanocrystals, giving rise to new synergetic functionalities. As a result, the specific capacitance of the perovskite-rGO conjugated electrodes can be enhanced by 178- and 152-times compared to those of the plain rGO and perovskite electrodes respectively.
我们报道，金属卤化物钙钛矿纳米晶体在还原氧化石墨烯（rGO）片上的直接共轭可为锌离子电容器提供高性能且稳定的电极。这是首次通过引入额外的赝电容机制，利用金属卤化物纳米晶体来增强电容器中二维材料的能量存储。特别地，我们提出了一种简单、快速且在室温下的激光诱导方法，用于将CsPbBr纳米晶体锚定在rGO片上，而不影响这两种组分的初始形态和晶体结构。rGO片的柔韧性和高表面积使得单个金属卤化物钙钛矿纳米晶体能够共轭，从而产生新的协同功能。结果，与普通的rGO电极和钙钛矿电极相比，钙钛矿-rGO共轭电极的比电容分别提高了178倍和152倍。
