Institute for Materials Discovery, University College London, London WC1E 7JE, UK.
Department of Chemistry, University College London, London WC1H 0AJ, UK.
Nanoscale. 2023 Feb 23;15(8):4000-4005. doi: 10.1039/d3nr00257h.
The development of photo-enhanced lithium-ion batteries, where exposing the electrodes to light results in higher capacities, higher rate performance or self-charging, has recently gained substantial traction. The challenge in these devices lies in the realisation of photo-electrodes with good optical and electrochemical properties. Herein, we propose copper-hexahydroxybenzene as the active photo-electrode material which both harvests light and stores energy. This material was mixed with reduced graphene oxide as a conductive additive and charge transfer medium to create photo-active electrodes. Under illumination, these electrodes show improved charge storage kinetics resulting in the photo-accelerated charging and discharging performance ( specific capacities improvement from 107 mA h g to 126 mA h g at 200 mA g and 79 mA h g to 97 mA h g at 2000 mA g under 1 sun illumination as compared to dark).
光增强锂离子电池的发展，即将电极暴露在光下会导致更高的容量、更高的倍率性能或自充电，最近引起了广泛关注。这些设备的挑战在于实现具有良好光学和电化学性能的光电电极。在此，我们提出六羟基苯铜作为活性光电电极材料，既能吸收光又能储存能量。将这种材料与还原氧化石墨烯混合作为导电添加剂和电荷转移介质，以制备光活性电极。在光照下，这些电极显示出改进的电荷存储动力学，从而实现光加速充电和放电性能（与黑暗相比，在 1 太阳光照下，比容量从 107 mA h g 提高到 126 mA h g（在 200 mA g 下），从 79 mA h g 提高到 97 mA h g（在 2000 mA g 下））。
