JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 36
·期 1
·1-14
·
IF 2.8
Han Xinghai,Song Guihong,Luo Di,Wu Yusheng,You Junhua
Mg 3 Bi 2 /Mg/Mg 2 Sn multilayer films with varying modulation periods were deposited on single crystalline Si substrate by alternating sputtering using high pure metal Mg, Mg 3 Bi 2 and Mg 2 Sn targets. The chemical and phase composition, surface and cross section image and thermoelectric performance of deposited films were observed, measured and studied. The results revealed that the deposited films were comprised of an evident layered structure containing the metal Mg, the Mg 2 Sn and the Mg 3 Bi 2 layer. The modulation period affected the carrier transport and thermoelectric properties of multilayer films. Carrier concentration, mobility, electrical conductivity and thermal conductivity of the multilayer films decreased with increasing heterogeneous interface, which severely scatter the carriers and phonon, reducing mobility and thermal conductivity. An increase in the Seebeck coefficient, power factor ( PF ), and thermoelectric figure of merit ( ZT ) was obtained by reducing modulation period. At room temperature, the film, which possessed the shortest modulation period of 677 nm, had a maximum ZT value of about 0.26. The carrier and phonon scattering processes were significantly strengthened by the more layer interface, enhancing the deposited film’s thermoelectric figure of merit.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Yijie Liu,Li Yin,Wenwu Zhang,Jian Wang,Shuaihang Hou,Zuoxu Wu,Zongwei Zhang,Chen Chen,Xiaofang Li,Hongjun Ji,Qian Zhang,Zhiguo Liu,Feng Cao
A wearable thermoelectric generator using human body temperature is a promising power supply for wearable electronics. Here we discuss the design and fabrication of one kind of wearable thermoelectric generator constructed by n -type Mg 3.2 Bi 1.498 Sb 0.5 Te 0.002 legs, p -type Bi 0.4 Sb 1.6 Te 3 legs, polyurethane matrices, and flexible Cu/polyimide electrodes. The proposed device has a low thermal bypass and an efficient thermal contact interface, resulting in a peak power density of ∼20.6 μW/cm 2 when placed on a human arm at an ambient temperature of 289 K (air velocity, 1.1 m/s) and a high peak power density of 13.8 mW/cm 2 at a temperature difference of 50 K. In addition, it can withstand 10,000 bending cycles at a bend radius of 13.4 mm, suggesting that the proposed wearable thermoelectric generator has the potential to be a real-time power supply for certain wearable electronics in daily life.
研究领域:
生物医学工程
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纳米能源材料
·
柔性电子学
·
热电转换技术
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可穿戴设备
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DOI
THIN SOLID FILMS
·
2024
·
IF 2
Xinghai Han,Guihong Song,Shuang Yang,Yusheng Wu,Junhua You
Mg 3 Bi 2 /Mg 2 Sn nanocomposite films were prepared on single Si substrate using high pure metal Mg, Mg 3 Bi 2 and Mg 2 Sn target by alternately sputtering. The phase composition of the deposited Mg 3 Bi 2 /Mg 2 Sn films was analyzed by X-ray diffraction patterns. The surface and cross-sectional morphology of the deposited Mg 3 Bi 2 /Mg 2 Sn films was observed by scanning electron microscope. The content and distribution of elements in the deposited Mg 3 Bi 2 /Mg 2 Sn films were measured by an energy dispersive spectroscopy. The Seebeck coefficient and electrical conductivity of the deposited films was measured by Seebeck coefficient/resistance analysis system. The carrier concentration and carrier mobility of the sample was measured and calculated by Hall experiments. Results showed that the Mg 3 Bi 2 /Mg 2 Sn films were composed of Mg 3 Bi 2 , Mg 2 Sn and a few of metal Mg phase. The carrier (hole) concentration and Seebeck coefficient gradually increased, but the mobility and electrical conductivity decreased with increasing the Mg 2 Sn phase content in deposited films. As a result of the competition between the electrical conductivity and the Seebeck coefficient, the power factor first increased, reached a maximum value of 1.20 mW·m −1 ·K −2 at 155 °C, and then decreased. The deposited Mg 3 Bi 2 /Mg 2 Sn nanocomposite films with 6.5 at.% Sn possessed the highest power factor in measured temperature range. The power factor of deposited Mg 3 Bi 2 films can be effectively improved by adding moderate Mg 2 Sn phase and forming Mg 3 Bi 2 /Mg 2 Sn nanocomposite films.
研究领域:
材料科学
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热电学
·
纳米技术
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DOI
高影响因子
Advanced Energy Materials
·
2025
·Vol. 15
·期 38
·e03481
·
IF 26
Minhui Yuan,Zhen Tong,Qing Cao,Wenjie Li,Min Ruan,Jiahao Jiang,Jingyi Lyu,Yanglong Hou,Ran He,Jing Shuai
N -type Mg 3 (Sb,Bi) 2 system has emerged as a groundbreaking thermoelectric (TE) material, renowned for its optimized electronic transport properties and intrinsically low lattice thermal conductivity (κ l ). However, the origin of anomalously low κ l and its weak temperature scaling (κ l ∼ T −0.5 , deviating from the classical T −1 behavior) remain elusive. Employing a theoretical framework that integrates ab initio anharmonic lattice dynamics into a unified heat transport theory accounting for particle-like propagation (κ p ) and wave-like coherent (κ c ) transport, phonon renormalization, and fourth-order anharmonic phonon scattering, the thermal transport property of Mg 3 Bi 2 is comprehensively investigated. It is found that the weakly bonded interlayer cation Mg atoms amplify phonon coherence through dynamic disorder, driving wave-like transport contributes ≈40% to κ l at 600 K, while four-phonon scattering significantly suppresses particle-like propagation (>40% reduction). The theoretical predictions of both the magnitude and temperature-dependent behavior of κ l in Mg 3 Bi 2 exhibit synergistic agreement with in-house and reported experimental values. This work pioneers key insights into the Mg cation sublattice tuning the particle-wave duality in phonon transport, its strong anharmonic potential disrupts phonon phase coherence while enhancing four-phonon scattering, collectively driving the low κ l in Mg 3 Bi 2 . This discovery provides two actionable design strategies—cation site engineering and coherent phonon tuning—for developing high- zT Mg 3 Bi 2 -based thermoelectrics.
研究领域:
材料科学
·
热电学
·
凝聚态物理
·
声子输运
·
计算材料物理
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DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Yi-Hong Tan,Wei-Tang Yao,Tianwen Zhang,Tao Ma,Lei-Lei Lu,Fei Zhou,Hong-Bin Yao,Shu-Hong Yu
Currently, developing high voltage (beyond 2 V) rechargeable Mg-ion batteries still remains a great challenge owing to the limit of corrosive electrolyte and low compatibility of anode material. Here we report a facile one step solid state alloying route to synthesize nanoclustered Mg3Bi2 alloy as a high-performance anode to build up a 2 V Mg-ion battery using noncorrosive electrolyte. The fabricated nanoclustered Mg3Bi2 anode delivers a high reversible specific capacity (360 mAh g–1) with excellent stability (90.7% capacity retention over 200 cycles) and high Coulombic efficiency (average 98%) at 0.1 A g–1. The good performance is attributed to the stable nanostructures, which effectively accommodate the reversible Mg2+ ion insertion/deinsertion without losing electric contact among clusters. Significantly, the nanoclustered Mg3Bi2 anode can be coupled with high voltage cathode Prussian Blue to assemble a full cell using noncorrosive electrolyte, showing a stable cycling (88% capacity retention over 200 cycles at 0.2 A g–1) and good rate capability (103 mAh g–1 at 0.1 A g–1 and 58 mAh g–1 at 2 A g–1). The energy and power density of the as-fabricated full cell can reach up to 81 Wh kg–1 and 2850 W kg–1, respectively, which are both the highest values among the reported Mg-ion batteries using noncorrosive electrolytes. This study demonstrates a cost-effective route to fabricate stable and high voltage rechargeable Mg-ion battery potentially for grid-scale energy storage.
研究领域:
材料科学
·
电化学
·
储能技术
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DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2020
·
IF 2.281
Yanqun Chen,Chao Wang,Zheng Ma,Lanwei Li,Shuyao Li,Jianli Wang
n-type Mg 3 Sb 2 –Mg 3 Bi 2 alloy shows as a potential new thermoelectric material (TE) and has been widely researched recently. The pure phase n-type Mg 3 · 20 (Sb 0·3 Bi 0.7 ) 1.99 Te 0.01 were prepared by adjusting Mg content with the Bi impurity phase being effectively suppressed. Then, Co element was doped into the pure phase and the electrical conductivity of samples were improved. With a high power factor of 20.3 μ W cm −1 K −2 for Mg 3·185 Co 0·015 (Sb 0·3 Bi 0.7 ) 1.99 Te 0.01 at 525 K. Additionally, it was found that the phonon scattering is enhanced due to the larger atomic mass of Co comparing to Mg and the lattice thermal conductivity is reduced. As a result, a high ZT value of ~ 1.03 at 525 K is achieved for the Mg 3·185 Co 0·015 (Sb 0·3 Bi 0.7 ) 1.99 Te 0.01 .
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yuanxiang Zhang,Maosheng Cui,Mengting Yuan,Zhen Mu,Han Wang,Xinchun Zhou,Yang Zhang,Lingxiu Chen,Xiaolan Xue
Magnesium metal batteries (MMBs) are promising candidates for sustainable energy storage, yet their development is severely hindered by the formation of passivation layers on the Mg anode. Conventional artificial interphase layers often suffer from progressive defunctionalization during prolonged cycling. Herein, we propose a chemical-dissolution-equilibrium-driven strategy that continuously supplies Bi3+ species to spontaneously construct an in situ Mg3Bi2/Bi protective layer on the Mg electrode surface. This self-sustaining interphase not only enables continuous interfacial repair but also provides abundant magnesiophilic nucleation sites, thereby facilitating highly efficient Mg plating/stripping. As a result, the Mg||Mg symmetric cell exhibits an ultralong cycling life exceeding 1500 h with an ultralow overpotential of 30 mV at 0.5 mA cm–2 and 0.25 mAh cm–2. Moreover, the preferential reduction of Bi3+ on various current collectors creates favorable nucleation sites for Mg deposition, leading to high Coulombic efficiencies in Mg||Cu, Mg||SS, and Mg||Mo asymmetric cells. Remarkably, the Mg||SS cell achieves a cycling life exceeding 1400 h with an average Coulombic efficiency of ∼99.84% and a low polarization voltage of 90 mV. This work underscores the critical role of a sustained dynamic interphase and establishes a new paradigm for designing nonaqueous, all-inorganic electrolytes for high-performance MMBs.
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产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 8
·期 4
·2101125
·
IF 7.295
Qi-Qi Wang,Fan Li,Sheng-Qing Xia,Jian Liu,Xiao-Cun Liu,Ling Chen,Cheng-Qian Zhang
The single crystal growth of Mg 3 Bi 2 -based thermoelectric materials is of great significance for their applications near room temperature. So far, it is still a big challenge to grow such bulk single crystals and attempts are primarily focused on the metal flux methods. For the first time, bulk single crystals of n-type Mg 3 Bi 1.49 Sb 0.5 Te 0.01 are directly grown by applying an In-situ Loading Bridgman method. The as-grown single crystal features an excellent carrier mobility of 220 cm 2 V −1 s −1 , which is among the best compared to other Mg 3 Bi 2 -based bulk materials. Besides, this method is successfully developed to fast grow uniform polycrystalline materials with high thermoelectric and mechanic performance. As demonstrated by the single-leg device, a large temperature difference of 10.5 K is achieved at the supplied electric current of 0.6 A, much superior to other room temperature state-of-the-art thermoelectric materials. With the single crystalline and polycrystalline materials prepared reliably and conveniently, in-depth investigations on the Mg 3 Bi 2 thermoelectric system can be greatly benefited, which should as well significantly facilitate their practical applications at room temperature.
研究领域:
材料科学
·
热电学
·
凝聚态物理
·
晶体生长
·
功能材料
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）