Composition-segmented BiSbTe thermoelectric generator fabricated by multimaterial 3D printing

Yang, Seong Eun; Kim, Fredrick; Ejaz, Faizan; Lee, Gi Seung; Ju, Hyejin; Choo, Seungjun; Lee, Jungsoo; Kim, Gyeonghun; Jung, Soo ho; Ahn, Sangjoon; Chae, Han Gi; Kim, Young Ho; Kwon, Beomjin; Son, Jae Sung

doi:10.1016/j.nanoen.2020.105638

Cited by 67 publications

(65 citation statements)

References 48 publications

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“…For example, the electrical conductivities increased, and the Seebeck coe cients decreased with decreasing sintering duration time in the entire measurement temperatures, agreeing with the changes in the hole concentrations since the electrical conductivity and Seebeck coe cient have the trade-off relation with the variable of the carrier concentrations. 45 At the optimum condition of the sintering duration time of 5 h, the samples exhibited the highest power factor of 6.3 µW/cm•K 2 at 1000 K ( Supplementary Fig. 11).…”

Section: Te Properties Of 3d-printed Cu 2 Se Materialsmentioning

confidence: 94%

“…37,38,[40][41][42] Our group reported the 3D printing process using organic binder-free all-inorganic Bi 2 Te 3 -based TE inks, tailored by the inorganic anions of Sb 2 Te 4 2ionic chalcogenidometallate (ChaM) molecule. [44][45][46] This inorganic anion is bene cial for securing the viscoelasticity of inks and producing purely inorganic 3D printed objects with high ZT values, which is the evaluation of energy conversion e ciency in materials by the equation of ZT= S 2 σT/κ, where S, σ, κ, and T are the Seebeck coe cient, electrical conductivity, thermal conductivity, and absolute temperature, respectively. The viscoelasticity of current organic binder-free Cu 2 Se TE inks was achieved through the use of inorganic Se 8 2polyanion that effectively hold Cu 2 Se particles together in an electrostatic manner.…”

Section: Rheological Design Of Cu 2 Se Te Inksmentioning

confidence: 99%

“…12 Moreover, this maximum value is one of the highest among the reported TE materials prepared from organic, inorganic, or composite-type inks. 36,37,40,41,44,45 Fabrication and evaluation of 3D-printed Cu 2 Se TE modules…”

Section: Te Properties Of 3d-printed Cu 2 Se Materialsmentioning

confidence: 99%

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Cu2Se-based thermoelectric cellular architectures for efficient and durable power generation

Choo

Ejaz

et al. 2021

Preprint

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Thermoelectric (TE) power generation offers a promising way to recover waste heat. The geometrical design of TE 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 TE architectures for efficient and durable power generation, realized by the extrusion-based 3D printing process of Cu2Se TE materials. We designed the optimum aspect ratio of a cuboid TE leg to maximize the power output and extended this design to the mechanically stiff cellular architectures of hollow hexagonal column- and honeycomb-based TE legs. Moreover, we developed organic binder-free Cu2Se-based 3D-printing inks with desirable viscoelasticity, tailored with an additive of inorganic Se82- polyanion, fabricating the designed topologies. The computational simulation and experimental measurement demonstrated the superior power output and mechanical stiffness of the proposed cellular TE architectures to other designs, unveiling the importance of topological designs of TE legs toward higher power and longer durability.

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Section: Te Properties Of 3d-printed Cu 2 Se Materialsmentioning

confidence: 94%

Section: Rheological Design Of Cu 2 Se Te Inksmentioning

confidence: 99%

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Cu2Se-based thermoelectric cellular architectures for efficient and durable power generation

Choo

Ejaz

et al. 2021

Preprint

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“…Recently, several approaches have been reported to fabricate TE modules by 3D printing of Bi 2 Te 3 , BiSbTe, SnSe, and skutterudites-based TE legs [22][23][24][25][26][27] . For example, inorganic ionic binders have been used to achieve moderate viscoelasticity in colloid inks and thereby realise the layer-wise deposition of 3D TE structures without degradation of TE performance 28,29 . However, the 3D printed TE structures developed thus far suffer from critically low resolution due to limited printability of inks and diminished functionality of the printed materials.…”

Section: Read Full Licensementioning

confidence: 99%

Direct ink writing of 3D thermoelectric architectures for fabrication of micro power generators

Kim

Yang

et al. 2021

Preprint

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Micro-thermoelectric modules can be used to develop unique components such as energy harvesters, active coolers, and thermal sensors in various integrated systems. However, the manufacturing of these modules still relies on costly traditional micro-fabrication processes, producing only two-dimensional (2D) thermoelectric films. This limitation severely constrains temperature gradient formation across thermoelectric films, and hence, the sufficient amount of power required to run integrated systems is not generated. Herein, we present the direct ink writing of micro-scale three-dimensional (3D) thermoelectric architectures for fabricating high-performance micro-thermoelectric generators. The characteristics of (Bi, Sb)2(Te, Se)3-based particles were precisely engineered such that the colloidal inks achieved outstanding viscoelasticity, thereby facilitating the creation of complex 3D architectures having high thermoelectric figure-of-merits of 1.1 (p-type) and 0.5 (n-type). Micro-thermoelectric generators made of 3D-written vertical filaments exhibited large temperature gradients and a good resulting power density, opening an avenue for the cost-effective and rapid manufacturing of integrated micro-thermoelectric modules.

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“…3D printing technology offers a revolutionary method to address these issues by computer-aided design and costeffective direct shaping of 3D bulk-scale TE legs and modules with optimized structures. [13][14][15][16][17] In recent years, there have been several research efforts to apply 3D-printing processes to TE materials and modules. Most of these studies focus on the production of Bi 2 Te 3 -based materials, which exhibit the highest ZTs near room temperature, necessitating for the expansion of printable TE materials that are operable at higher temperatures, for example, exhaust gases normally discharge at temperatures of 600-800 K. [12] Among the various TE materials, PbTe-based compounds are arguably some of the best in the temperature range of 500-800 K. [18] PbTe has a high-symmetry cubic crystal structure, complicated electronic band structures, and strong anharmonicity owing to the cationic disorder, resulting in a high Seebeck coefficient, high electrical conductivity, and low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Doping‐Induced Viscoelasticity in PbTe Thermoelectric Inks for 3D Printing of Power‐Generating Tubes

Lee

Choo

et al. 2021

Advanced Energy Materials

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Thermoelectric (TE) technologies offer promising means to enhance fossil energy efficiencies by generating electricity from waste heat from industrial or automobile exhaust gases. For these applications, thermoelectric modules should be designed from the perspective of system integration for efficient heat transfer, system simplification, and low processing cost. However, typical thermoelectric modules manufactured by traditional processes do not fulfil such requirements, especially for exhaust pipes. Hence, a 3D‐printing method for PbTe thermoelectric materials is reported to design high‐performance power‐generating TE tubes. The electronic doping‐induced surface charges in PbTe particles are shown to significantly improve the viscoelasticities of inks without additives, thereby enabling precise shape and dimension engineering of 3D bulk PbTe with figures of merit of 1.4 for p‐type and 1.2 for n‐type materials. The performance of the power‐generating TE tube fabricated from 3D‐printed PbTe tubes is demonstrated experimentally and computationally as an effective strategy to design system‐adaptive high‐performance thermoelectric generators.

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Composition-segmented BiSbTe thermoelectric generator fabricated by multimaterial 3D printing

Cited by 67 publications

References 48 publications

Cu2Se-based thermoelectric cellular architectures for efficient and durable power generation

Cu2Se-based thermoelectric cellular architectures for efficient and durable power generation

Direct ink writing of 3D thermoelectric architectures for fabrication of micro power generators

Doping‐Induced Viscoelasticity in PbTe Thermoelectric Inks for 3D Printing of Power‐Generating Tubes

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