Microwave-enabled rapid, continuous, and substrate-free synthesis of few-layer graphdiyne nanosheets for enhanced potassium metal battery performance

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2025-06-01 DOI:10.1016/S1872-5805(25)60987-5

Ya KONG , Shi-peng ZHANG , Yu-ling YIN , Zi-xuan ZHANG , Xue-ting FENG , Feng DING , Jin ZHANG , Lian-ming TONG , Xin GAO

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Abstract

Graphdiyne (GDY) is a two-dimensional carbon allotrope with exceptional physical and chemical properties that is gaining increasing attention. However, its efficient and scalable synthesis remains a significant challenge. We present a microwave-assisted approach for its continuous, large-scale production which enables synthesis at a rate of 0.6 g/h, with a yield of up to 90%. The synthesized GDY nanosheets have an average diameter of 246 nm and a thickness of 4 nm. We used GDY as a stable coating for potassium (K) metal anodes (K@GDY), taking advantage of its unique molecular structure to provide favorable paths for K-ion transport. This modification significantly inhibited dendrite formation and improved the cycling stability of K metal batteries. Full-cells with perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) cathodes showed the clear superiority of the K@GDY anodes over bare K anodes in terms of performance, stability, and cycle life. The K@GDY maintained a stable voltage plateau and gave an excellent capacity retention after 600 cycles with nearly 100% Coulombic efficiency. This work not only provides a scalable and efficient way for GDY synthesis but also opens new possibilities for its use in energy storage and other advanced technologies.

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微波支持快速，连续，无底物合成的少层石墨烯纳米片，以增强钾金属电池的性能

石墨二炔（GDY）是一种具有特殊物理和化学性质的二维碳同素异形体，越来越受到人们的关注。然而，其高效和可扩展的合成仍然是一个重大挑战。我们提出了一种微波辅助的连续大规模生产方法，可以以0.6 g/h的速度合成，收率高达90%。合成的GDY纳米片平均直径为246 nm，厚度为4 nm。我们使用GDY作为钾(K)金属阳极的稳定涂层（K@GDY），利用其独特的分子结构为K离子传输提供有利的路径。该改性显著抑制了K金属电池枝晶的形成，提高了K金属电池的循环稳定性。采用苝-3,4,9,10-四羧酸二酐（PTCDA）阴极的全电池在性能、稳定性和循环寿命方面明显优于裸K阳极。K@GDY在600次循环后保持稳定的电压平台，并具有接近100%的库仑效率。这项工作不仅为GDY合成提供了一种可扩展和高效的方法，而且为其在储能和其他先进技术中的应用开辟了新的可能性。下载：下载高分辨率图片（156KB）下载：下载全尺寸图片

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.