Seong Eun Yang, Youngtaek Oh, Jungsoo Lee, Seungheon Shin, So-Hyeon Lee, Keonkuk Kim, Changhyeon Nam, Sangjoon Ahn, Ju-Young Kim, Hayoung Chung, Jae Sung Son
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引用次数: 0
摘要
可持续能源解决方案使人们对热电发电产生了浓厚的兴趣,热电发电可将废热转化为电能。然而,热电发电机的实际应用却因其对任意热源的适应性以及在运行环境中的耐用性等问题而受到阻碍。在此,我们提出了由高熵 (Ag,Cu)2(S,Se,Te)韧性合金组成的可变形辅助热电超材料,并利用有限元建模和三维(3D)打印技术加以实现。我们设计了一种具有负泊松比的重入辅助结构,以最大限度地提高机械变形能力,并开发了一种基于(Ag,Cu)2(S,Se,Te)粒子的胶体三维打印墨水,该墨水由 Te 微粒子定制。三维打印(Ag,Cu)2(S,Se,Te)合金的ZT值为1.15,同时具有很高的抗压强度(208兆帕)和断裂应变(17.5%)。制造出的辅助超材料表现出卓越的振动稳定性和对各种曲面的适应性,实现了同步曲面热源的高效发电。我们的方法为设计耐用、高效的热回收装置提供了一种方法。
Ductile (Ag,Cu)2(S,Se,Te)-based auxetic metamaterials for sustainable thermoelectric power generation
Sustainable energy solution has resulted in significant interest in thermoelectric power generation, converting waste heat into electricity. However, the practical application of thermoelectric generators has been hindered by issues with their adaptability to arbitrary heat sources and durability in an operational environment. Here, we propose deformable auxetic thermoelectric metamaterials composed of high-entropy (Ag,Cu)2(S,Se,Te) ductile alloys, realized using finite element modelling and three-dimensional (3D) printing. We design a re-entrant auxetic structure with a negative Poisson’s ratio to maximize the mechanical deformability and develop an (Ag,Cu)2(S,Se,Te) particle-based colloidal 3D printable ink, tailored with Te microparticles. The 3D-printed (Ag,Cu)2(S,Se,Te) alloy exhibit a ZT value of 1.15 coupled with high compressive strength (208 MPa) and fracture strain (17.5%). The fabricated auxetic metamaterials exhibit excellent vibrational stability and adaptability to diverse curved surfaces, realizing efficient power generation on a synclastic curved heat source. Our approach offers a method to design durable and efficient heat recovery devices.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.