Gang Cheng, Zhenyu Guo, Nagaraju Goli, Filip Podjaski, Kaitian Zheng, Jinglin Jiang, Sami Ramadan, Gwilherm Kerherve, Stefano Tagliaferri, Mauro Och, Norbert Klein, Mattia Cattelan, Stefano Agnoli, Maria-Magdalena Titirici, Cecilia Mattevi
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引用次数: 0
Abstract
Combining energy harvesting with energy storage systems in a single device could offer great advantages for continuous power supply in both indoor and outdoor electric applications. In this work, we demonstrate a photochargeable sodium-ion battery (PSIB) based on a photoactive cathode of two-dimensional crystals of MoSe2. This photocathode enables spontaneous photodriven charging of a sodium-ion battery cathode under illumination and an increase in the reversible capacity to 29% at 600 mA g–1 compared to that under dark conditions during galvanostatic cycling. Exposure of MoSe2 to light drives the Na+ extraction, prompted by photogenerated holes, and accelerates the charge transfer kinetics with improved ion diffusion, which leads to an increased capacity. Moreover, the PSIB can be charged to 1.68 V under light illumination without applying an external current. Our work paves the way for the development of light-driven rechargeable batteries, which can benefit off-grid technologies such as the Internet of Things.
将能量收集与能量存储系统结合在一个设备中,可以为室内和室外电力应用的连续供电提供巨大的优势。在这项工作中,我们展示了一种基于二维MoSe2晶体的光活性阴极的光充电钠离子电池(PSIB)。这种光电阴极可以使钠离子电池阴极在照明条件下进行自发光驱动充电,并且在600 mA g-1时的可逆容量比在静电流循环的黑暗条件下增加29%。MoSe2暴露于光下驱动Na+的提取,由光产生的空穴引起,并通过改善离子扩散加速电荷转移动力学,从而导致容量增加。此外,PSIB可以在光照下充电至1.68 V,而无需施加外部电流。我们的工作为光驱动可充电电池的发展铺平了道路,这可以使物联网等离网技术受益。
期刊介绍:
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
- Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale
- Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies
- Modeling and simulation of synthetic, assembly, and interaction processes
- Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance
- Applications of nanoscale materials in living and environmental systems
Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.