Bifunctional quaternary quantum dots enabled carrier-oriented-channel and broad-spectrum-energy storage of ZnCuInSe-VO2 heterojunction cathode-based photo-rechargeable zinc-ion batteries

IF 20.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Energy Storage Materials Pub Date : 2025-08-28 DOI:10.1016/j.ensm.2025.104568

Shuang’ an Liu, Senyang Wang, Mengyu Liu, Xin Li, Ling Li

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Abstract

Safe, spontaneous and efficient photo-rechargeable zinc-ion batteries (photo-ZIBs) are at the forefront of solar energy storage. However, the limited absorption of only a fraction of visible wavelengths yet greatly restricts the photoelectric conversion efficiency (PCE) and capacity. Herein, a noteworthy combination of quantum dot light absorption and zinc ion storage is reported to achieve broad-spectrum utilization of photo-ZIBs based on ZnCuInSe QDs/VO₂ (QDVO) cathode. With an absorption edge ∼1100 nm, ZnCuInSe QDs as light absorption range extender, significantly compensate the lack of VO₂ (<550 nm) and greatly expand the number of photo-carriers. Moreover, the heterostructure between ZnCuInSe QDs and VO₂ introduces a second-order potential well, which accelerates the carrier transfer and enhances the photo-charging spontaneity. Under standard sunlight (100 mW/cm²), QDVO-based photo-ZIBs achieved a capacity light gain of 47.2 % and a specific discharge capacity of 438.5 mAh/g (0.2 A/g), much higher than 24.3 % and 361.1 mAh/g of VO₂. Finally, a net photo-charging PCE of 0.21 % (AM1.5) is achieved, providing a new exploration for broader spectrum storage of solar energy.

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双功能四元量子点使zncu - vo2异质结阴极光可充电锌离子电池的载流子导向通道和广谱能量存储

安全、自发和高效的光可充电锌离子电池（photo-ZIBs）处于太阳能储能的前沿。然而，有限的吸收仅一小部分可见波长，极大地限制了光电转换效率（PCE）和容量。本文报道了量子点光吸收和锌离子存储的结合，实现了基于ZnCuInSe QDs/VO2 （QDVO）阴极的光电zibs的广谱利用。ZnCuInSe量子点的吸收边缘为1100 nm，作为光吸收范围扩展器，显著补偿了VO2 （<550 nm）的缺失，并大大增加了光载流子的数量。此外，ZnCuInSe量子点与VO2之间的异质结构引入了一个二阶势阱，加速了载流子转移，增强了光充电的自发性。在标准阳光（100mw /cm2）下，基于qdvo的光电zibs实现了47.2%的容量光增益和438.5 mAh/g （0.2 a /g）的比放电容量，远高于VO2的24.3%和361.1 mAh/g。最后，实现了0.21% （AM1.5）的净光充电PCE，为更宽光谱的太阳能存储提供了新的探索。

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来源期刊

Energy Storage Materials Materials Science-General Materials Science

CiteScore

33.00

自引率

5.90%

发文量

652

审稿时长

27 days

期刊介绍： Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field. Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy. Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.