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김주영

Kim, Ju-Young
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Cu2Se-based thermoelectric cellular architectures for efficient and durable power generation

Author(s)
Choo, SeungjunEjaz, FaizanJu, HyejinKim, FredrickLee, JungsooYang, Seong EunKim, GyeonghunKim, HangeulJo, SeungkiBaek, SeongheonCho, SoyoungKim, KeonkukKim, Ju-YoungAhn, SangjoonChae, Han GiKwon, BeomjinSon, Jae Sung
Issued Date
2021-06
DOI
10.1038/s41467-021-23944-w
URI
https://scholarworks.unist.ac.kr/handle/201301/53032
Fulltext
https://www.nature.com/articles/s41467-021-23944-w
Citation
NATURE COMMUNICATIONS, v.12, no.1, pp.3550
Abstract
Thermoelectric power generation offers a promising way to recover waste heat. The geometrical design of thermoelectric legs in modules is important to ensure sustainable power generation but cannot be easily achieved by traditional fabrication processes. Herein, we propose the design of cellular thermoelectric architectures for efficient and durable power generation, realized by the extrusion-based 3D printing process of Cu2Se thermoelectric materials. We design the optimum aspect ratio of a cuboid thermoelectric leg to maximize the power output and extend this design to the mechanically stiff cellular architectures of hollow hexagonal column- and honeycomb-based thermoelectric legs. Moreover, we develop organic binder-free Cu2Se-based 3D-printing inks with desirable viscoelasticity, tailored with an additive of inorganic Se-8(2-) polyanion, fabricating the designed topologies. The computational simulation and experimental measurement demonstrate the superior power output and mechanical stiffness of the proposed cellular thermoelectric architectures to other designs, unveiling the importance of topological designs of thermoelectric legs toward higher power and longer durability.
Publisher
NATURE RESEARCH
ISSN
2041-1723
Keyword
NUMERICAL-SIMULATIONWASTE HEATPERFORMANCEFIGUREMERITCOMPOSITESBEHAVIORSELENIUMDESIGN

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