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Your search keyword '"Li, Shuangming"' showing total 240 results
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240 results on '"Li, Shuangming"'

23. High-performance flexible p-type Ce-filled Fe3CoSb12 skutterudite thin film for medium-to-high-temperature applications.

Author

Li, Dou, Shi, Xiao-Lei, Zhu, Jiaxi, Cao, Tianyi, Ma, Xiao, Li, Meng, Han, Zhuokun, Feng, Zhenyu, Chen, Yixing, Wang, Jianyuan, Liu, Wei-Di, Zhong, Hong, Li, Shuangming, and Chen, Zhi-Gang

Subjects
SKUTTERUDITE, THIN films, PULSED laser deposition, LASER deposition, THERMOELECTRIC apparatus & appliances, POWER density
Abstract

P-type Fe3CoSb12-based skutterudite thin films are successfully fabricated, exhibiting high thermoelectric performance, stability, and flexibility at medium-to-high temperatures, based on preparing custom target materials and employing advanced pulsed laser deposition techniques to address the bonding challenge between the thin films and high-temperature flexible polyimide substrates. Through the optimization of fabrication processing and nominal doping concentration of Ce, the thin films show a power factor of >100 μW m−1 K−2 and a ZT close to 0.6 at 653 K. After >2000 bending cycle tests at a radius of 4 mm, only a 6 % change in resistivity can be observed. Additionally, the assembled p-type Fe3CoSb12-based flexible device exhibits a power density of 135.7 µW cm−2 under a temperature difference of 100 K with the hot side at 623 K. This work fills a gap in the realization of flexible thermoelectric devices in the medium-to-high-temperature range and holds significant practical application value. The authors fabricate p-type Fe3CoSb12-based skutterudite films exhibiting high thermoelectric performance, stability, and flexibility at medium-to-high temperatures, based on preparing custom target materials and pulsed laser deposition techniques. [ABSTRACT FROM AUTHOR]

Published
2024
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24. A Dynamic Propagation Numerical Model of Hydraulic Fracture Interactions with Pre-Existing Complex Natural Fractures.

Author

Li, Shuangming, Zhao, Huan, Wang, Jianbo, Xie, Xiaorui, Qin, Lan, Zou, Linhao, and Liu, Yapeng

Subjects
HYDRAULIC fracturing, HYDRAULIC models, POISSON'S ratio, ROCK deformation, CRACK propagation (Fracture mechanics), ELASTIC modulus
Abstract

The propagation of hydraulic fractures is highly influenced by the geological structure of the reservoir in unconventional reservoirs, such as natural fractures. In this paper, a new fluid–solid coupling dynamic model was built which presents the failure mechanism of hydraulic fracture with pre-existing simple and complex natural fractures. The cohesive element method and the maximum principal stress fracture criterion were used in the new model. An analysis was conducted to investigate the impact of various factors, including encounter angle, in situ stress, elastic modulus, and Poisson's ratio, on the propagation of hydraulic fractures. The simulation results indicate that the encounter angle and the in situ stress are the main factors affecting the fracture morphology. When the encounter angle and the in situ stress difference are small, hydraulic fractures propagate along natural fractures. When the elastic modulus is small, it is advantageous for the advancement of both hydraulic and natural fractures. The Poisson's ratio has a slight effect on the fracture propagation pattern. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Fast Fabrication of High‐Performance CoSb3‐Based Thermoelectric Skutterudites via One‐Step Yb‐Promoted Peritectic Solidification.

Author

Li, Dou, Shi, Xiao‐Lei, Feng, Zhenyu, Li, Meng, Zhu, Jiaxi, Ma, Xiao, Zhang, Lili, Zhong, Hong, Liu, Wei‐Di, Li, Shuangming, and Chen, Zhi‐Gang

Subjects
THERMOELECTRIC materials, SOLIDIFICATION, PERITECTIC reactions, YOUNG'S modulus, THERMAL conductivity, PHASE transitions
Abstract

As a most promising mid‐temperature thermoelectric material, CoSb3‐based bulk material exhibits an applicable figure‐of‐merit (ZT) of more than one. However, their fabrication is historically time‐consuming due to the long‐time solid‐state phase transitions from CoSb2 to CoSb3. To overcome this challenge, here, a fast one‐step process is developed to fabricate n‐type Yb‐doped CoSb3 with stable ZT of 1.12 at 765 K in <5 h. Experiments confirm Yb promotes peritectic reactions of CoSb + Liquid → CoSb2 and CoSb2 + Liquid → CoSb3, optimizes power factor, and suppresses thermal conductivity. Moreover, the dense grains, induced by the one‐step crystallization, result in outstanding mechanical properties with a Young's modulus of 171.4 GPa and a hardness of 8.8 GPa in the Yb‐doped CoSb3. This study indicates that the fast one‐step fabrication route can effectively promote the practical applications of CoSb3‐based thermoelectrics and provide guidance for thermoelectric fabrication via rational phase design. [ABSTRACT FROM AUTHOR]

Published
2023
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