Multifunctional layered structure graphene aerogel with customizable shape by ion diffusion-directed assembly

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-03-27 DOI:10.1016/j.carbon.2025.120265

Ze Lin , Chenwei Shen , Yuxing Xia , Ruize Ma , Jie He , Boyang Zhu , Yingjun Liu , Zhen Xu , Weiwei Gao , Chao Gao

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引用次数: 0

Abstract

Aerogels with a layered structure fully leverage the in-plane mechanical, electrical, and thermal properties of two-dimensional building blocks for various engineering applications. However, the layered structure aerogels produced by freeze-casting require bidirectional temperature gradient to direct solid crystal growth, limiting the fabrication of complex macroscopic shapes of aerogels for multifunctional protection in specific situations. Here, we developed an ion diffusion-directed assembly (IDDA) strategy to enable the fabricate layered structure graphene aerogels (LGAs) with customizable macroscopic shapes. Metal ions spontaneously diffuse (concentration difference) into the negatively charged graphene oxide (GO) dispersion from the out-of-plane direction of the substrate and assemble GO to form a layered structure. Preparation of custom-shaped LGAs can be achieved by using IDDA strategy with custom-shaped substrates. Layered structure endows LGAs with super-elasticity (nearly full recovery after 10,000 cycles at 90 % compressive strain) and ultrahigh electromagnetic interference (EMI) shielding performance (an EMI shielding effectiveness of 89.3 dB and a specific shielding effectiveness of 107,850 dB cm²/g). Notably, LGAs can provide efficient electromagnetic protection for customized shapes. Additionally, LGAs exhibit strain-sensitive conductivity, demonstrating excellent compression-induced tunable EMI shielding and sensing performance. This IDDA strategy is extendable to other charged colloidal systems, enabling efficient fabrication of layered aerogels with complex shapes and multicomponent, promising for the practical application of multifunctional aerogels.

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.