ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Minghan Wu,Siqi Hao,Linfeng Qi,Yu Shi,Wei Yang,Jingjing Bao,Min Du,Zhengyu Mo,Licheng Sun
Thermogalvanic cells (TGCs) are at the forefront of effective thermoelectric conversion methods, but the practical utilization of their integrated devices is hindered by the suboptimal performance of N-type TGCs. Herein, a novel redox couple of Cu/Cu(en)22+ is proposed to construct a liquid-state N-type TGC. The electrochemical reaction involving the Cu electrode, ethylenediamine (en), and their chelated compound Cu(en)22+ exhibits a significant reaction entropy change, resulting in an enhanced temperature coefficient (α). We reveal that the α of the Cu/Cu(en)22+-based TGC reaches 1.64 mV K–1. Furthermore, by optimizing the concentrations of Cu2+, ethylenediamine, and (NH4)2SO4 in the electrolyte, both α and normalized power density can be significantly improved, achieving values of 2.12 mV K–1 and 676 μW m–2 K–2, respectively. Moreover, by constructing a P–N junction with P-type and N-type TGC, we achieve a high potential of 121 mV under a temperature gradient of 35 K. This work expands the available redox couple options for N-type TGCs and offers a new pathway for efficient thermoelectric conversion.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Fengdong Teng,Na Li,Ying Yuan,Junrong Yu,Yan Wang,Zuming Hu
The complex preparation process and high shrinkage of poly(p-phenylene terephthalamide) (PPTA) aerogel limit its wider application. Herein, PPTA and heterocyclic aramid (HPPTA) prepolymer were secondary polymerized to obtain Block-PPTA (BPPTA) with both rigid and flexible segments in the molecular chain. The rigid and flexible segments in molecular chain under non-solvent enable the rapid transformation of BPPTA solutions into well-shaped BPPTA gels. The BPPTA aerogel exhibits the advantages of low shrinkage, high thermal insulation, and high mechanical strength. Then, a small amount of MXene and AgNWs were attached to the surface of BPPTA aerogels by layer-by-layer spraying method, which not only enhanced the flame retardancy capability of the aerogels, but also made organic aerogels possible to be applied in the fields of electromagnetic interference shielding and thermoelectric conversion. This work provides an ideal strategy for the efficient preparation of low shrinkage para aramid aerogels and expands the application areas of aerogels.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shaoping Chen,Yachao Wang,Yaning Wang,Wenhao Fan,Jingyun Guo,Jie Chen,Yu Jiang,Rasha Abdullah Ahmed Al-Yusufi,Zuhair A. Munir
In addition to the thermal and electrical characteristics of the thermoelectric material , the energy conversion efficiency of TE devices is influenced by other factors including the interface resistance, which in turn is affected by chemical changes or mechanical failure. We have investigated the use of FeTe as an electrode for iodine-doped PbTe. The telluride of iron has CTE and work function values that match well with those of PbTe. The FeTe/PbTe contact was determined as ohmic in nature with low resistance. Contact resistance and shear strength values were determined over aging times of up to 400 h at 573 K and were found to be nearly unchanged. In contrast, samples in which Fe was used as electrode showed significant decrease in shear strength and a significant increase in joint resistivity over the same aging conditions. From the electrical and thermal characterization, the conversion efficiency of the FeTe/Pb 1.0004 Te 0.997 I 0.003 /FeTe single leg was determined as 4.678% for T h = 673 K and T c = 300 K.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Xiaoyu Yang,Peng Wang,Xiaolong Wu,Qingmin Li,Haoxi Cong,Wei Duan,Ying Yue,Tiejun Ci,Chunyan Li
Solar energy is one of the most promising energy sources, and its effective use has been continuously attracting widespread attention. Here, a solar-power thermoelectric system with self-cleaning capability was introduced based on a hydrogel. The hydrogel is formed through the polymerization of acrylic acid and acrylamide, resulting in the formation of compact ion channels within its structure. The mixed solvent of dimethyl sulfoxide and ethylene glycol plays a crucial role in this process by generating a significant number of hydrogen bonds, which enables the hydrogel to retain water and possess exceptional strength. Based on the coupling effect of the aforementioned two characteristics, the hydrogel exhibits a stable and remarkable electrochemical reaction facilitated by the synergistic action of NaCl and Fe(CN)63–/4–. By leveraging the unique reaction mechanism within the hydrogel, we achieved significant improvements in multiple aspects of the system, including high Seebeck coefficient (2.1 mV K–1), excellent thermoelectric figure of merit (9.84 × 10–3), good electrical conductivity (1.6 S m–1), and low thermal conductivity (0.251 W m–1 K–1). Furthermore, the integration of superhydrophobicity using fluoridated carbon nanotubes endows the system with photothermal and self-cleaning capability simultaneously. Particularly, the power density can reach 3.3 mW m–2, which could lit the LED easily. Thus, this self-cleaning thermoelectric system represents a promising option for solar-energy-dependent outdoor solar energy utilization.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Chenhui Bai,Xuebiao Li,Xiaojing Cui,Xinru Yang,Xinru Zhang,Kun Yang,Tao Wang,Hulin Zhang
Aqueous thermocells are environment-friendly power sources capable of converting low-grade thermal energy into electricity to power small electronics in various application scenarios free from batteries . However, its poor portability and transparency, mechanical fragility, and low output performance impose a burden on its extensive application. Here, we demonstrate a highly transparent, flexible and stretchable gel with the cross-linked PVA/gelation double network frame by introducing DMSO/water binary solvent to suppress the formation of hydrogen bonds along the three dimensional directions, forming numerous microcrystalline regions. When the temperature difference is 40 K, the gel-based thermogalvanic cell achieves an open-circuit voltage of about 63 mV with the maximum power density of about 1.2 mW m -2 . By implanting a PDMS solar absorber , the assembled solar thermoelectric gel device delivers a maximum temperature difference of about 11.2 K with an open-circuit voltage up to 16.6 mV and short-circuit current of more than 100μA, respectively, upon exposure to sunshine over 12 h. This work may provide new ideas for harnessing ambient heat and solar energy to electrical energy conversion.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Dingyao Liu,Chuxin Lei,Kai Wu,Qiang Fu
A solar thermoelectric generator (STEG) that generates electricity from sunlight is expected to be a promising technology for harvesting and conversion of clean solar energy. The integration of a phase-change material (PCM) with the STEG even more enables engines to durably generate power in spite of solar radiation flux. However, its photothermal conversion and output electricity is still limited (<15 W/m2) by the PCM’s deficient thermal management performance, i.e., restricted thermal conductivity and nonuniform heat-transfer behavior under concentrated sunlight radiation. In this study, a biomimetic phase-change composite, with centrosymmetric and a multidirectionally aligned boron nitride network embedded in polyethylene glycol, is tailored for the STEG via a radial ice-template assembly and infiltration strategy, which behaves in a highly and multidirectionally thermoconductive way and enables a rapid transfer of heat flux and uniform temperature distribution with respect to even a spot-like heat source. As a consequence, a powerful STEG is tactfully designed via the integration of this high-thermal-management characteristic and maximum collection of solar beams, for durable and real-environment solar–thermal–electric conversion, with its photothermal energy conversion efficiency of up to 85.1% and a high peak power density of 40.28 W/m2.
研究领域:
能源科学
·
材料科学
·
热力学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xinyang He,Jiatai Gu,Yunna Hao,Maorong Zheng,Liming Wang,Jianyong Yu,Xiaohong Qin
Thermoelectric conversion technology provides a new method for directly collecting and converting the heat released by the human body to electrical energy, which has attracted extensive attention in the field of smart wearable electronics. However, current thermoelectric materials for wearable thermoelectric devices often face problems such as air impermeability, large volume, poor integration, and limited stretchability. Herein, an advanced fabrication approach combining coagulation-bath electrospinning and self-assembly strategies is proposed to efficiently and continuously fabricate CNT/PEDOT:PSS thermoelectric nanofiber yarns with high stretchability (∼350%) and seamability. During the spinning process, the nonsolvent induced phase separation and self-assembly effect result in a large amount of CNT/PEDOT:PSS loaded on each individual nanofiber. Since the thermoelectric material is loaded inside the yarn rather than simply coated on the surface, it exhibits excellent mechanical stability. In addition, based on the thermoelectric effect and seamability of the yarns, they can be integrated into gloves and masks for cold/heat source identification and human respiration monitoring in self-powered mode. Moreover, the self-powered strain sensor composed of the yarn shows corresponding thermovoltage changes for different strains, which can be used to optimize basketball players’ shooting percentage. These unique features make the thermoelectric nanofiber yarn show broad prospects in smart wearable fields such as wearable generators, breathing monitoring, and exercise optimization.
研究领域:
材料科学
·
智能可穿戴设备
·
能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Li-Sheng Tang,Yi-Cun Zhou,Ling Zhou,Jie Yang,Lu Bai,Rui-Ying Bao,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
Energy conversion technologies and systems associated with phase change materials (PCMs) have gained great popularity recently. How to convert the heat captured from solar energy into applicable electricity is significant and challenging, in particular for stable power output. Given that three-dimensional (3D) structural scaffold can ameliorate shape stability and thermal conductivity simultaneously, a novel double-layered multifunctional 3D hybrid scaffold is developed through two-step freeze-casting to produce leakage-proof photodriven composite PCMs with enhanced thermal conductivity for efficient light-thermoelectric conversion. The as-prepared double-layered scaffold is composed of black bacterial cellulose (BC)/thermochromic particle (TP) upper layer with the function of reversible photoabsorption and white BC/boron nitride (BN) lower layer with the function of heat conduction. The resultant leakage-proof composite PCMs exhibit high thermal conductivity up to 3.26 W/(mK) at a BN loading of 16.3 vol% and improved reversible photoabsorption ability. When used as heat source in a light-thermoelectric power generation system, a long-term stable output voltage of 287 mV is generated, achieving effective conversion from renewable solar energy to applicable electricity.
研究领域:
能源材料
·
光热转换
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-8
·
IF 3.998
Chang Chao,Wang Zongyu,Fu Benwei,Ji Yulong
Solar energy as an abundant renewable resource has been investigated for many years. Solar thermoelectric conversion technology, which converts solar energy into thermal energy and then into electricity, has been developed and implemented in many important fields. The operation of solar–thermal–electric conversion systems, however, is strongly affected by the intermittency of solar radiation, which requires installation of thermal storage subsystems. In this work, we demonstrated a new solar–thermal–electric conversion system that consists of a thermoelectric converter and a rapidly charging thermal storage subsystem. A magnetic-responsive solar–thermal mesh was used as the movable charging source to convert incident concentrated sunlight into high-temperature heat, which can induce solid-to-liquid phase transition of molten salts. Driven by the external magnetic field, the solar–thermal mesh can move together with the receding solid–liquid interface thus rapidly storing the harvested solar–thermal energy within the molten salts. By connecting with a thermoelectric generator, the harvested solar–thermal energy can be further converted into electricity with a solar–thermal–electric energy conversion efficiency up to 2.56%, and the converted electrical energy can simultaneously light up more than 40 orange-colored LEDs. In addition to stable operation under sunlight, the charged thermal storage subsystem can release the stored heat and thus enables the solar–thermal–electric system to continuously generate electricity after removal of solar illumination.
研究领域:
能源科学
·
材料科学
·
可再生能源技术
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 52
·2411029
·
IF 18.5
Qingtao Zeng,Xuejun Lai,Hongqiang Li,Zhonghua Chen,Xingrong Zeng,Liqun Zhang
The preparation of high-performance and fire-safe electrolytes for flexible quasi-solid-state supercapacitors is challenging. In this work, a novel fire-safe and multifunctional deep eutectic solvent gel (DESG) is fabricated using acrylic acid and urea as hydrogen bond donors and choline chloride as a hydrogen bond acceptor. DESG shows a high ionic conductivity (0.552 S m −1 ), good electrochemical performance (specific capacitance: 106.8 F g −1 ), and a wide operating temperature range (−20–90 °C), being a promising candidate for flexible solid-state supercapacitors. Furthermore, it exhibits a good thermoelectric conversion capability (Seebeck coefficient: 1.56 mV K −1 ), being ideal for thermoelectric capacitors and fire-warning sensors. The prepared DESG rapidly self-extinguishes after removal from fire, reaching a limiting oxygen index value of 38.0% and demonstrating its excellent flame retardancy. In addition, DESG has a good self-healing performance (healing efficiency of 84.3%). The work provides new insights into the preparation and application of high fire-safety and multifunctional eutectogels for flexible quasi-solid-state supercapacitors.
研究领域:
材料科学
·
能源存储
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Haiquan Zhang,Qinrong Sun,Yanping Yuan,Zujing Zhang,Xiaoling Cao
Electro-to-heat energy conversion/storage provides a new direction for the development of phase change materials (PCMs). However, conversion rate and energy storage density of the existing PCMs are limited by their low intrinsic electrical and thermal conductivities and poor compressive strength. In this work, a novel form-stable phase change material (FSPCM) has been prepared via ligand replacement followed by the embedment of acetylene black conductive network. The addition of 20 wt% acetylene black reduces the resistivity of the polyethylene glycol-based PCM from 10 7 −10 12 Ω·m to 0.3 Ω·m, while its thermal conductivity is increased by 300%. The resulting conductive composite possesses the ability to store heat at voltage as low as 1.8 V and high electro-to-heat conversion efficiency. The composite compressive strength reaches 10 5 Pa at an ambient temperature of 110 °C, while the temperature is 60 °C more than that of phase transition temperature of PCM. Further, the magnitude of the temperature change in the electrothermal conversion curves recorded after 50 solid-liquid phase transition cycles does not exceed 2.0%. The excellent electrical and thermal conductivities as well as good mechanical properties of the synthesized composite suggest a promising route for manufacturing novel materials with high power capacity for thermal storage applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ling Li,Ningqiang Shi,Xiangqian Jiang,Weiping Chen,Chuncheng Ban,Jiandong Hao
Energy recovery and reuse, industrial waste heat, and thermal energy recovery and conversion in emerging electronic devices are topics of widespread interest. Flexible composite thermoelectric (TE) films have become the key to TE conversion, and many studies and synthesis methods related to them have made great progress. However, little research has been performed on the corresponding composites of typical TE materials with low-dimensional nanotubular materials, particularly modulation of the overall TE properties using doped low-dimensional nanotubular materials. In this work, high-quality bismuth telluride (Bi2Te3) nanowires and boron nitride nanotubes (BNNTs) were prepared using electrolytic deposition and high-temperature catalytic deposition, respectively. Bi2Te3–BNNTs composite films were prepared using a solvent hot pressing method. The Bi2Te3–BNNTs composite film conductivity reached 179.6 S/cm at room temperature (300 K), the corresponding Seebeck coefficient was 171.4 μV/K, and the power factor (PF) was 52.8 nW/mK2. Carbon doping of BNNTs resulted in carbon–boron nitride nanotubes (BCNNTs), and Bi2Te3–BNNTs composite films were prepared. The Bi2Te3–BCNNTs composite films obtained a conductivity of 4629.6 S/cm, at room temperature (300 K), a corresponding Seebeck coefficient of 181.2 μV/K, and a PF of 1520.0 nW/mK2. This study has important reference value for the application of TE conversion. Moreover, the electrical conductivity decreased by no more than 10% after 400 cycles of bending tests, and the electrical conductivity showed signs of recovery after repressing thermally, which undoubtedly proves that Bi2Te3–BCNNTs composite films have good flexibility and thermal stability, and this has contributed to the application and promotion of flexible thermoelectric materials.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）