Journal of Materiomics最新文献_第2页

Highly enhanced thermoelectric performance in (In, Pb) co-doped BiSbTe alloys via synergistic modulation of carrier concentration and band structure 通过协同调制载流子浓度和能带结构，（in, Pb）共掺Bi-Sb-Te合金的热电性能得到了显著提高

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101115

Jiang-Hu Yu , Yu Wang , Chong-Yu Wang , Hao Liang , Yi-Lin Liu , Ze-Yuan Yang , Yi-Xin Zhang , Jing Feng , Zhen-Hua Ge

The extensive utilization of thermoelectric (TE) conversion technology necessitates stricter performance requirements for bismuth telluride (Bi₂Te₃)-based commercial materials. Despite the numerous optimization methods available for Bi₂Te₃-based materials, each optimization method has a certain upper limitation, and combining multiple strategies can achieve the optimal thermoelectric figure of merit (zT). In this study, the thermoelectric properties of (Bi,Sb)₂Te₃ materials are enhanced through the combined use of the heavy element Pb to regulate carrier concentration and the In element to optimize the band structure. Notably, indium (In) can suppress p-type antisite defects, which generate abundant Te vacancies, and help regulate the carrier concentration to its optimal level. This co-doping strategy achieves optimal carrier concentration, thereby enhancing the power factor (PF = 4.57 × 10³ μW⸱m⁻¹⸱K⁻²), and generating abundant dislocations, the presence of the rich nano-second phase Sb₂O₃ contributes to reduced lattice thermal conductivity. Consequently, a peak zT value of 1.41 at 323 K and a high average zT value of 1.23 between 300 K and 500 K are achieved. Additionally, two pairs of thermoelectric modules, composed of p-type (Bi_0.42Sb_1.58)_0.994(In, Pb)_0.006Te₃ and zone-melted n-type Bi₂Te_2.7Se_0.3, demonstrate a conversion efficiency of 7.3% at a temperature difference of 250 K. This underscores the promising potential of these thermoelectric modules in commercialization. Thus, this study demonstrates the feasibility of combining multiple strategies and is expected to provide a potential reference for other thermoelectric systems.

热电（TE）转换技术的广泛应用，对基于碲化铋（Bi2Te3）的商用材料提出了更严格的性能要求。尽管bi2te3基材料的优化方法众多，但每种优化方法都有一定的上限，多种策略的结合才能获得最优热电性能图（zT）。在本研究中，通过重元素Pb调控载流子浓度和In元素优化能带结构的组合使用，增强了（Bi,Sb）2Te3材料的热电性能。值得注意的是，铟（In）可以抑制产生大量Te空位的p型反位缺陷，并有助于将载流子浓度调节到最佳水平。这种共掺杂策略获得了最佳载流子浓度，从而提高了功率因数（PF=4.57×103 μW⸱m-1⸱K-2），并产生了丰富的位错，丰富的纳米第二相Sb2O3的存在有助于降低晶格导热系数。因此，在323 K时zT峰值为1.41，在300 K和500 K之间达到了高平均zT值1.23。另外，由p型（Bi0.42Sb1.58）0.994(In, Pb)0.006Te3和区熔型Bi2Te2.7Se0.3组成的两对热电模块在250 K温差下的转换效率为7.3%。这强调了这些热电模块在商业化方面的巨大潜力。因此，本研究证明了多种策略相结合的可行性，并有望为其他热电系统提供潜在的参考。

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引用次数: 0

Post-selenization tailored carrier-crystallographic synergy in c-axis Bi2Se3 thin films for advanced thermoelectrics 用于先进热电学的c轴Bi2Se3薄膜中硒化后的载流子晶体协同作用

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101099

Zhi Gao , Shuaihang Hou , Xinqi Liu , Yuli Xue , Zhipeng Li , Qi Zhao , Jianglong Wang , Zhiliang Li , Shufang Wang

Bi₂Se₃ has emerged as a promising thermoelectric (TE) material due to its environmentally benign composition and earth-abundant constituents. However, the practical implementation of Bi₂Se₃-based systems remains challenging due to suboptimal TE performance. This study demonstrates the fabrication of c-axis oriented Bi₂Se₃ thin films through pulsed laser deposition, with subsequent selenization treatment significantly enhancing TE performance through dual optimization of carrier concentration and crystallographic alignment. A strategic post-deposition selenization process effectively mitigates selenium vacancies and correspondingly reduces the carrier concentration to 2.0 × 10¹⁹ cm⁻³ while improving in-plane carrier mobility. A high power factor (PF) of about 9.5 μW⸱cm⁻¹⸱K⁻² is achieved at 475 K in the highly c-axis oriented Bi₂Se₃ thin films selenized for about 60 min, outperforming the reported state-of-the-art Bi₂Se₃ films. Demonstrating practical applicability, an 8-leg planar thin-film device generates an exceptional power density of 441.3 μW/cm² under a 25 K temperature gradient, establishing new performance benchmarks for chalcogenide-based microgenerators. These findings provide crucial insights into defect engineering and structural optimization strategies for developing high-performance TE devices compatible with self-powered microelectronic applications.

由于其对环境无害的成分和地球上丰富的成分，Bi2Se3已成为一种有前途的热电（TE）材料。然而，由于TE性能欠佳，基于bi2se3的系统的实际实施仍然具有挑战性。本研究展示了通过脉冲激光沉积制备c轴取向Bi2Se3薄膜，随后的硒化处理通过对载流子浓度和晶体取向的双重优化显著提高了TE性能。策略性的沉积后硒化工艺有效地缓解了硒空位，相应地将载流子浓度降低到2.0×1019 cm-3，同时提高了载流子在平面内的迁移率。在475 K温度下，高c轴取向Bi2Se3薄膜的硒化时间约为60分钟，功率因数（PF）约为9.5 μW⸱cm-1⸱K-2，优于目前报道的最先进的Bi2Se3薄膜。8腿平面薄膜器件在25 K温度梯度下可产生441.3 μW/cm2的优异功率密度，为硫族化合物微发生器建立了新的性能基准。这些发现为开发与自供电微电子应用兼容的高性能TE器件提供了缺陷工程和结构优化策略的重要见解。

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引用次数: 0

Defect-engineered core-shell structured NaNbO3-based energy storage ceramics 缺陷工程核壳结构nanbo3储能陶瓷

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101097

Qinpeng Dong, Yu Zhang, Yue Pan, Jiangping Huang, Xiuli Chen, Xu Li, Huanfu Zhou

As research on lead−free energy storage materials advances, high−performance substrates and their modification methods have been continuously explored. In NaNbO₃–based energy storage ceramics, low polarization limits the enhancement of energy storage performance. This study utilized defect engineering design to prepare (1–x)NaNbO₃-xSr(Fe_1/3Sb_2/3)O₃ ceramics with core–shell structure through a Fe/Sb dual oxidation state variable element synergistic regulation strategy. The goal is to enhance ΔP and optimize E_b of ceramics by adjusting the content of vacancy defects and phase structure, so that ceramics can achieving high energy storage characteristics. A W_rec of 6.4 J/cm³ and η of 80% at 645 kV/cm were achieved in NaNbO₃–based ceramic. Additionally, based on this study, we performed a detailed analysis of the origin of high ΔP and the influence of defect structures on E_b, with the aim of providing a new reference for development and research of high–performance lead–free energy storage ceramics.

随着无铅储能材料研究的深入，高性能衬底及其改性方法不断得到探索。在基于nanbo3的储能陶瓷中，低极化限制了储能性能的提高。本研究利用缺陷工程设计，通过Fe/Sb双氧化态变元协同调控策略制备了具有核壳结构的（1-x）NaNbO3-xSr(Fe1/3Sb2/3)O3陶瓷。目标是通过调整空位缺陷的含量和相结构来增强ΔP和优化陶瓷的Eb，使陶瓷达到高储能特性。在645 kV/cm下，纳米bo3基陶瓷的Wrec为6.4 J/cm3， η为80%。此外，在本研究的基础上，我们详细分析了高ΔP的来源以及缺陷结构对Eb的影响，旨在为高性能无铅储能陶瓷的开发和研究提供新的参考。

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引用次数: 0

Enhanced polarization and reliability of hafnia-based ferroelectrics with 0.1 nm AlOx insertion layer 0.1 nm AlOx插入层增强了铪基铁电体的极化和可靠性

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101104

Xin Liu , Junfeng Zheng , Kunhao Chen , Dandan Qu , Jiyang Wu , Ruiqiang Tao , Zhen Fan , Jiyan Dai , Junming Liu , Xubing Lu

HfO₂-based ferroelectrics have emerged as promising candidates for next-generation memory applications due to their superior scalability and CMOS compatibility. However, the inherent trade-off between polarization characteristics and switching reliability remains a critical challenge. This study presents a systematic investigation of doping and intercalation effects on the continuous modulation of grain size and oxygen vacancies in AlO_x-inserted Hf_0.5Zr_0.5O₂ (HZO) films. Our findings reveal that only 0.1 nm AlO_x insertion layer in HZO can significantly reduce the leakage current (by 2 orders of magnitude) and improve the P_r/E_c value (by 44.6%). Moreover, the field cycling characteristics are enhanced through the suppression of the paraelectric m-phase as well as the balancing of fatigue and wake-up induced phase transitions between antiferroelectric t-phase and ferroelectric o-phase. This work offers valuable insights into the fabrication of high-performance and highly reliable HfO₂-based ferroelectric thin films.

基于hfo2的铁电体由于其优越的可扩展性和CMOS兼容性，已成为下一代存储器应用的有希望的候选者。然而，极化特性和开关可靠性之间的权衡仍然是一个关键的挑战。本研究系统地研究了掺杂和插层效应对alox掺杂HZO薄膜中晶粒尺寸和氧空位的连续调制。研究结果表明，在HZO中仅添加0.1 nm的AlOx插入层就能显著降低泄漏电流（降低2个数量级），提高Pr/Ec值（提高44.6%）。此外，通过抑制准电m相以及平衡反铁电t相和铁电o相之间的疲劳和唤醒相变，增强了场循环特性。这项工作为高性能和高可靠的hfo2基铁电薄膜的制造提供了有价值的见解。

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引用次数: 0

Friction constructing a capacity-compensation interlayer enabled the stable lithium metal batteries 摩擦形成容量补偿夹层，使锂金属电池稳定

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101098

Shaozhen Huang , An Wang , Jiahua Liao , Xiangli Zhong , Hongjia Song , Chao Zhong , Zhongming Wang , Yuejiao Chen , Kecheng Long , Jinbin Wang , Libao Chen

The high-energy-density lithium metal batteries (LMBs) is expected to drive the development of the low-altitude economy and electro vehicles. Nevertheless, the practical application of lithium anodes is hampered by well-known issues of unstable interfacial electrochemistry. For the cathode materials with or without Li in the lithium metal batteries, the mechanisms and problems faced on the interfacial stabilization regulation of the Li anodes are different. Herein, based on in-depth consideration of lithium-free cathode (S) and lithium-containing cathode (NCM811) systems, respectively, we present a friction coating strategy to create an interlayer on the lithium foil anodes (LS@Li and LSe@Li) and lithium boron alloy anodes (LS@LiB and LSe@LiB), which can compensate for sulfur loss and achieve dendrite-free lithium plating. Deeply discuss and reveal the differences of interfacial electrodeposition of LS and LSe interlayers based on the interfacial capacitance. By using this modified interface layer design, we have achieved simultaneous improvement in the performance of both Li||S batteries and Li||NCM811 batteries (lifespan increased by 1.3 times and capacity increased by 1.8 times for Li||S as well as lifespan increased by 2.8 times for Li||NCM811). This strategy forms a stable interlayer based on incomplete mechanochemical reactions, which paves a new way for high-energy-density LMBs.

高能量密度锂金属电池有望推动低空经济和电动汽车的发展。然而，锂阳极的实际应用受到众所周知的界面电化学不稳定问题的阻碍。对于锂金属电池中含锂和不含锂的正极材料，锂阳极的界面稳定调节机制和面临的问题不同。本文在深入研究无锂阴极(S)和含锂阴极（NCM811）体系的基础上，提出了一种摩擦涂层策略，在锂箔阳极（LS@Li和LSe@Li）和硼锂合金阳极（LS@LiB和LSe@LiB）上形成一层夹层，可以补偿硫的损失，实现无枝晶镀锂。从界面电容的角度，深入讨论并揭示了LS和LSe夹层界面电沉积的差异。通过改进的接口层设计，我们实现了Li||S电池和Li||NCM811电池的性能同时提高（Li||S电池寿命提高1.3倍，容量提高1.8倍，Li||NCM811电池寿命提高2.8倍）。该策略在不完全力学化学反应的基础上形成了稳定的中间层，为高能量密度lmb的制备开辟了新途径。

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引用次数: 0

Aliovalent co-doping induces relaxor states with enhanced electrostrain in BNT-based ceramics 共价共掺杂在bnt基陶瓷中诱导弛豫态并增强电应变

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101107

Amei Zhang , Wanchang Man , Ruiyi Jing , Hongping Hou , Yule Yang , Leiyang Zhang , Hongliang Du , Li Jin

Developing high-performance lead-free electrostrain materials is key to advancing next-generation electromechanical technologies. Here we report an aliovalent co-doping strategy in (Bi_0.5Na_0.5)TiO₃-based (BNT-based) ceramics, where simultaneous A-site (Li⁺) and B-site (Nb⁵⁺) co-doping yields (1−x)Bi_0.5(Na_0.81K_0.19)_0.5TiO₃-xLiNbO₃ (BNKT-xLN, x= 0.01–0.04) compositions. The aliovalent substitution disrupts long-range ferroelectric order, enhances lattice distortion, and promotes a relaxor-like state with diffuse phase transitions and strong dielectric dispersion. Complementary polarization–electric field (P–E) and strain–electric field (S–E) measurements demonstrate a progressive evolution from classical ferroelectrisc to nonergodic relaxor behavior as the doping level increases. The optimized composition at x = 0.02 exhibits a large reversible electrostrain of approximately 0.55% associated with a temperature-driven reversible phase transition. Notably, BNKT-xLN ceramics achieve electric-field-induced polarizations exceeding 50 μC/cm², while exhibiting a relatively low electrostrictive coefficient Q₃₃ of ∼0.018 m⁴/C², suggesting their potential as energy storage matrices due to the weak polarization–strain coupling effect. These results underscore the importance of aliovalent co-doping strategy in modulating the energy landscape of BNT-based systems, offering a viable strategy for developing high-strain, lead-free electroceramics suited to next-generation actuators and energy storage devices.

开发高性能无铅电应变材料是推进下一代机电技术的关键。本文报道了一种基于（Bi0.5 na0.5） tio3 （BNT-based）陶瓷的共价共掺杂策略，其中a位（Li+）和b位（Nb5+）同时共掺杂得到（1−x）Bi0.5(Na0.81K0.19)0.5TiO3-xLiNbO3 （BNKT-xLN, x = 0.01-0.04）组合物。共价取代破坏了长程铁电序，增强了晶格畸变，促进了具有扩散相变和强介电色散的类弛豫态。互补极化电场（P-E）和应变电场（S-E）测量表明，随着掺杂水平的增加，从经典铁电行为逐渐演变为非过能弛豫行为。在x = 0.02时，优化的组合物表现出约0.55%的可逆电应变，并伴有温度驱动的可逆相变。值得注意的是，BNKT-xLN陶瓷实现了超过50 μC/cm2的电场诱导极化，同时表现出相对较低的电伸缩系数Q33 (~ 0.018 m4/C2)，表明由于弱极化-应变耦合效应，它们具有作为储能矩阵的潜力。这些结果强调了共价共掺杂策略在调节基于btc的系统的能量格局中的重要性，为开发适合下一代执行器和储能设备的高应变无铅电陶瓷提供了可行的策略。

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引用次数: 0

Intercalation strategy induced superior energy storage performance in Aurivillius Bi6Ti3FeAlO18 film under low and medium electric fields 在低电场和中电场条件下，嵌入策略诱导Aurivillius Bi6Ti3FeAlO18薄膜具有优异的储能性能

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101113

Quanlong Liu , Yanxia Zhang , Runjie Wang , Xiurong Feng , Lei Zhang , Yan Liu , Zhehong Tang , Fei Guo , Jieyu Chen , Yuchen Ye , Yunpeng Zhou

A new type of lead-free dielectric film capacitor with high energy density and rapid charge-discharge performance under a low and medium applied electric field is essential for electrical and electronic systems. Herein, we propose an efficient and straightforward approach to enhance the energy storage performance of the Aurivillius Bi₅Ti₃FeO₁₅ film through intercalation strategy. The insertion of BiAlO₃ units, which have a weak domain-forming potential, into the Bi₅Ti₃FeO₁₅ matrix establishes an ergodic relaxor. This modification further increases the difference between the maximum polarization and the remanent polarization. Under 1500 kV/cm, the Bi₆Ti₃FeAlO₁₈ film exhibits an excellent energy storage density of 67.5 J/cm³, along with a high energy storage efficiency of 75.5%. This leads to an exceptionally high energy storage response coefficient, which surpasses those of most dielectric films. Furthermore, the Bi₆Ti₃FeAlO₁₈ film exhibits outstanding thermal stability within a temperature range of −30 °C–150 °C, commendable frequency stability from 0.05 kHz to 20.00 kHz, and remarkable fatigue resistance after 1 × 10⁸ cycles. This study investigates a potential lead-free material suitable for low-electric-field-driven capacitors and also lays a foundation for developing Aurivillius-type lead-free high-energy-storage applications at low and medium electric fields through intercalation strategy.

新型无铅介质薄膜电容器具有高能量密度和在低、中等外加电场下快速充放电的性能，是电气和电子系统中必不可少的材料。在此，我们提出了一种通过插层策略来提高Aurivillius Bi5Ti3FeO15薄膜储能性能的有效而直接的方法。将具有弱结构域形成电位的BiAlO3单元插入到Bi5Ti3FeO15矩阵中，建立了遍历弛豫。这种修改进一步增加了最大极化和剩余极化之间的差异。在1500 kV/cm下，Bi6Ti3FeAlO18薄膜的储能密度为67.5 J/cm3，储能效率为75.5%。这导致一个异常高的能量存储响应系数，这超过了那些大多数介电薄膜。此外，Bi6Ti3FeAlO18薄膜在-30°C至150°C的温度范围内具有出色的热稳定性，在0.05 kHz至20.00 kHz范围内具有良好的频率稳定性，并且在1 × 108次循环后具有出色的抗疲劳性能。本研究探索了一种适合于低电场驱动电容器的潜在无铅材料，也为通过嵌入策略开发中、低电场的aurivillius型无铅高能量存储应用奠定了基础。

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引用次数: 0

Damage tolerance and cyclic stability of 3D-architected Al2O3/polymer composites 三维结构Al2O3/聚合物复合材料的损伤容限和循环稳定性

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101112

Wanyu Li, Keqiang Zhang, Zijian Zhang, Yingjie Feng, Chunlei Wan

The inherent brittleness and unpredictable catastrophic fracture of ceramic materials significantly limit their reliability in engineering applications, necessitating innovative approaches to enhance energy absorption capacity and cyclic load tolerance for structural components. This study presents a novel strategy for fabricating high-strength and cyclically-stable Al₂O₃/polymer composites through digital light processing (DLP) 3D printing of triply periodic minimal surface (TPMS) architectures combined with polymer infiltration. Mechanical characterization revealed exceptional quasi-static compressive strength of (201.9 ± 13.2) MPa coupled with remarkable energy absorption capacity reaching (40.1 ± 0.8) MJ/m³. The synergistic combination of TPMS structural design and extrinsic polymer toughening mechanisms induced progressive failure patterns characterized by extensive crack deflection and controlled interfacial debonding. Notably, the architected composites demonstrated outstanding cyclic durability, sustaining over 100 cycles at 60% and 70% maximum stress levels while maintaining 73 cycles at 80% stress level. Mechanical analysis attributed this performance enhancement to the polymer matrix's dual role in stress redistribution and energy dissipation accumulation during cyclic loading. This bioinspired structural design paradigm effectively addresses traditional ceramics' brittleness limitations, demonstrating significant potential for engineering applications in extreme environments requiring damage tolerance and load cycling reliability.

陶瓷材料固有的脆性和不可预测的灾难性断裂严重限制了其在工程应用中的可靠性，因此需要创新方法来提高结构构件的能量吸收能力和循环载荷承受能力。本研究提出了一种通过数字光处理（DLP） 3D打印结合聚合物渗透的三周期最小表面（TPMS）结构来制造高强度和循环稳定的Al2O3/聚合物复合材料的新策略。力学特性表明，准静态抗压强度为（201.9±13.2）MPa，吸能能力为（40.1±0.8）MJ/m3。TPMS结构设计和外源聚合物增韧机制的协同作用导致了以广泛裂纹挠曲和受控界面脱粘为特征的渐进式破坏模式。值得注意的是，这种结构复合材料表现出了出色的循环耐久性，在60%和70%的最大应力水平下可以维持100多次循环，而在80%的应力水平下可以维持73次循环。力学分析将这种性能增强归因于聚合物基体在循环加载过程中应力重新分布和能量耗散积累的双重作用。这种受生物启发的结构设计范式有效地解决了传统陶瓷的脆性限制，在需要损伤容限和载荷循环可靠性的极端环境中展示了巨大的工程应用潜力。

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引用次数: 0

Toward inorganic flexible π-shaped thermoelectric generators with high output power density: From materials to devices 迈向高输出功率密度无机柔性π形热电发生器：从材料到器件

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101146

Kun Hu , Luohong Si , Jie Gao , Lei Miao , Sijing Zhu , Shiyuan Zhao , Jun-Liang Chen , Jianhua Zhou , Kunihito Koumoto

Flexible thermoelectric generators (f-TEGs) have emerged as among the most promising candidates to address the persistent energy supply challenges associated with wearable electronics. To achieve practical applications of inorganic π-shaped f-TEGs rapidly requires enhancing their output power density, which represents the primary and pivotal objective. This review distills three main factors that govern output power density, namely, the power factor of thermoelectric materials, the geometric and packaging configurations of f-TEGs, as well as the effective temperature gradient across the f-TEGs. Further, the principal optimization strategies adopted for these factors over recent years are outlined. The strategies encompass approaches such as carrier concentration modulation, carrier scattering mechanism regulation, and energy band engineering to enhance the power factor, finite element simulations and numerical computations for optimizing geometric structure and packaging, and the integration of hydrogels and phase change materials into flexible heat sinks to establish and maintain sufficiently large temperature differences. Additionally, the discussion extends to the flexibility of inorganic materials and generators themselves. Finally, the concluding section addresses the challenges and critical issues confronting the development of flexible thermoelectric materials and generators.

柔性热电发电机（f- teg）已成为解决与可穿戴电子产品相关的持续能源供应挑战的最有希望的候选者之一。快速实现π形无机f-TEGs的实际应用，需要提高其输出功率密度，这是首要和关键的目标。本文总结了影响输出功率密度的三个主要因素，即热电材料的功率因数，f- teg的几何和封装结构，以及f- teg的有效温度梯度。此外，概述了近年来针对这些因素采用的主要优化策略。这些策略包括载流子浓度调制、载流子散射机制调节和能带工程等方法来提高功率因数，有限元模拟和数值计算来优化几何结构和封装，以及将水凝胶和相变材料集成到柔性散热器中以建立和保持足够大的温差。此外，讨论扩展到无机材料和发电机本身的灵活性。最后，总结部分阐述了柔性热电材料和发电机发展面临的挑战和关键问题。

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引用次数: 0

A core-shell structure to realize high thermoelectric performance in Fe and Sb co-doped GeTe materials 采用核壳结构实现Fe和Sb共掺GeTe材料的高热电性能

IF 9.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materiomics

Pub Date : 2026-01-01 DOI: 10.1016/j.jmat.2025.101108

Fengting Mao , Zhongwei Zhang , Sijing Zhu , Chengyan Liu , Jie Gao , Jun-Liang Chen , Xiaoyang Wang , Tong Xing , Lei Miao

GeTe is a promising medium-temperature thermoelectric material. However, an excessively high concentration of Ge holes leads to a high hole carrier concentration, which can degrade its performance. Though carrier concentration reduction via doping has been pursued as a principal optimization approach, the strong interdependence between key transport parameters and carrier concentration severely limited the overall enhancement efficacy. In this work, a simple composite method is employed to achieve synergistic optimization of carrier concentration and carrier mobility, thereby increasing the power factor and reducing the lattice thermal conductivity. Sb and Fe form a core-shell structure, which effectively scatters phonons and reduces the lattice thermal conductivity, achieving a minimum value of 0.59 W⸱m⁻¹⸱K⁻¹ at 723 K. Additionally, Fe doping enhances the effective mass, improves the Seebeck coefficient, and significantly boosts the power factor, which reaches a peak value of 43.0 μW⸱cm⁻¹⸱K⁻² at 623 K. The results demonstrate that the sample Ge_0.885Sb_0.1Fe_0.015Te achieves a maximum zT of approximately 2.13 at 723 K and an average zT (zT_avg) of 1.43 within the temperature range of 323 K–773 K. This work provides an effective path to enhance the performance of GeTe-based thermoelectric materials.

GeTe是一种很有前途的中温热电材料。然而，过高的锗空穴浓度会导致空穴载流子浓度过高，从而降低其性能。虽然通过掺杂降低载流子浓度是一种主要的优化方法，但关键输运参数与载流子浓度之间的强烈相互依赖性严重限制了整体增强效果。本文采用简单的复合方法，实现载流子浓度和载流子迁移率的协同优化，从而提高功率因数，降低晶格导热系数。Sb和Fe形成核壳结构，有效散射声子，降低晶格导热系数，在723 K时达到最小值0.59 W⸱m-1⸱K - 1。此外，Fe的掺入提高了有效质量，提高了Seebeck系数，显著提高了功率因数，在623 K时达到峰值43.0 μW⸱cm-1⸱K - 2。结果表明，样品Ge0.885Sb0.1Fe0.015Te在723 K时zT最大值约为2.13，在323 ~ 773 K温度范围内zTavg平均值为1.43。本研究为提高gete基热电材料的性能提供了一条有效途径。

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引用次数: 0