Advanced Materials Interfaces
·
2022
·Vol. 9
·期 17
·2200555
·
IF 6.389
Zhendong Mao,Zhiwen Wang,Taifeng Shi,Peng-an Zong,Jia Liang,Zhenguo Liu,Peng Zhang,Yujia Huang,Yi Han,Kaleem Ahmad,Zeyad Almutairi,Chunlei Wan
Flexible thermoelectrics (TEs) that fit curved human skin well, could harvest energy from skin, and thus have been considered as a promising portable power source for wearable electronics. Bi 2 Te 3 , the most popular room-temperature TE material, is still challenging to be applied in flexible devices due to its rigid nature. Although many Bi 2 Te 3 -based films have been reported to be flexible when made thin enough, the thermal and electrical loads across them are rather small with severe limitation on the maximum power output. This work realizes a thick Bi 2 Te 3 -based TE film with a “graphene/Bi 2 Te 3 /graphene” sandwiched structure, which demonstrates an unprecedentedly high figure of merit for flexibility among all Bi 2 Te 3 -based films ever reported, due to the outstanding intrinsic flexibility of graphene and a small slippage barrier. Meanwhile, graphene acts as express conducting channels as well as carrier donors, resulting in an increased electrical conductivity. The numerous graphene/Bi 2 Te 3 heterointerfaces induce energy filtering effect, leading to an enhanced Seebeck coefficient, and thus an optimized power factor is achieved. This work offers a cost-effective avenue to make highly flexible TE films for power supply of wearable electronics by intercalating TE nanoplates into 2-dimensional nanosheets.
研究领域:
材料科学
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纳米技术
·
能源工程
✓ 已验证
DOI
高影响因子
Science China-Technological Sciences
·
2017
·Vol. 60
·期 12
·1878-1884
·
IF 1.719
Liu YanXiong,Liu Dong,Liu GuanNan
In the present study, Fe nanoparticles (NPs) can ignite when exposed to a conventional camera flash. The ignition process of Fe NPs was composed of the initial ignition stage with the maximum temperature level of 2000 K and the burning stage with temperature level of 800 K. The microstructure characterization indicated Fe NPs were oxidized to Fe 2 O 3 via the exposure-melt mechanism. It was found that more particle numbers per unit area can lead to lower minimum ignition energy which may be caused by the enhancement light energy absorption. The light energy absorbed from the flash was influenced by wavelengths but the conversion of Fe was only related to the packing mass.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 24
·2201165
·
IF 6.389
Xiaohan Xu,La Li,Weijia Liu,Zhongming Chen,Di Chen,Guozhen Shen
Thermally chargeable supercapacitors (TCSCs) are emerging and promising devices that could convert thermal energy spontaneously existing in nature into electricity and then store energy for further utilization. Herein, this work reports on the freestanding 3D Ti 3 C 2 T x MXene-based TCSC, where lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), poly(ethylene oxide) (PEO), and polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) serve as gel electrolyte. Different from the semiconductor-based thermoelectric materials, the fabricated Ti 3 C 2 T x TCSC exhibits a high Seebeck coefficient of 78.4 mV K −1 . Moreover, when applying a temperature difference (ΔT) of 5.8 K between the cold and hot sides, the Ti 3 C 2 T x TCSC devices provide a stable high voltage of 400.6 mV. The charging/discharging cycles of the Ti 3 C 2 T x TCSC devices upon periodic Δ T of 3.3 and 5.8 K demonstrate their excellent stability. To realize the practical application, the four Ti 3 C 2 T x TCSCs devices connected in series are charged by supplying a Δ T of 5.8 K and used to power a digital timer, demonstrating the possibility and application of the TCSCs in self-powered integrated electronics.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2025
·Vol. 9
·期 7
·2400901
·
IF 4.7
Zhengjie Xu,Jianing Wang,Qiang Lou,Yufeng Jin,Hong Meng,Hang Zhou
Poly(3-hexylthiophene) (P3HT) has attracted significant interest due to its cost-effective synthesis, high purity, and stable film properties. However, the efficiency of perovskite solar cells is limited by energy-level mismatches and nonradiative recombination at the P3HT/perovskite interface. In this study, we introduce the 2,7-dimetapyridinebenzo[4,5]thieno[3,2-b]benzofuran (Mpy-BTBF) small molecule, which features extended π -conjugation and lone pair electrons from oxygen and sulfur atoms. Incorporating Mpy-BTBF into P3HT (M-P3HT) improves charge transport and passivates iodine-related defects, achieving a power conversion efficiency (PCE) of 16.36%, surpassing the pristine P3HT-based device (14.49%). With further Li salts doping, the champion PCE increased to 21.24 from 17.30%. Finally, M-P3HT-based devices maintained over 70% of their efficiency after 600 h of aging at 60% relative humidity and 60°C.
研究领域:
材料科学
·
光伏技术
·
有机电子学
✓ 已验证
DOI
高影响因子
Science Advances
·
2025
·Vol. 11
·期 5
·
IF 12.5
Zhuodong Tang,Jingyu Wu,Shaojun Wu,Wenjing Tang,Jian-Rong Zhang,Wenlei Zhu,Jun-Jie Zhu,Zixuan Chen
Enzymes facilitate the conversion of chemical energy into mechanical work during biochemical reactions, thereby regulating the dynamic metabolic activity of living systems. However, directly observing the energy release facilitated by fluctuating individual enzymes remains a challenge, leading to a contentious debate regarding the underlying reasons for this phenomenon. Here, we aim to overcome this challenge by developing an oscillating nanomotor powered by a single-molecule enzyme, which allows real-time tracking of energy transduction in enzymatic reactions. Through analysis of the shifts in free energy profiles within the nanomotors, our results unveil not only the heterogeneous energy release patterns of individual enzyme molecules but also the dynamic disorder of a particular enzyme in energy release over extended monitoring periods. By exploring six distinct types of single-molecule enzymatic reactions, we provide the direct evidence supporting the argument that the reaction enthalpy governs the enzymatic energy release. This approach has implications for understanding the mechanism of enzymatic catalysis and developing highly efficient nanomotors.
研究领域:
生物化学
·
纳米技术
·
酶学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Guo Chenyue,Tang Huajie,Wang Pengfei,Xu Qihao,Pan Haodan,Zhao Xinyu,Fan Fan,Li Tingxian,Zhao Dongliang
Harvesting electricity from ubiquitous water vapor represents a promising route to alleviate the energy crisis. However, existing studies rarely comprehensively consider the impact of natural environmental fluctuations on electrical output. Here, we demonstrate a bilayer polymer enabling self-sustaining and highly efficient moisture-electric generation from the hydrological cycle by establishing a stable internal directed water/ion flow through thermal exchange with the ambient environment. Specifically, the radiative cooling effect of the hydrophobic top layer prevents the excessive daytime evaporation from solar absorption while accelerating nighttime moisture sorption. The introduction of LiCl into the bottom hygroscopic ionic hydrogel enhances moisture sorption capacity and facilitates ion transport, thus ensuring efficient energy conversion. A single device unit (1 cm 2 ) can continuously generate a voltage of ~0.88 V and a current of ~306 μA, delivering a maximum power density of ~51 μW cm −2 at 25 °C and 70% relative humidity (RH). The device has been demonstrated to operate steadily outdoors for continuous 6 days.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2021
·
IF 15.881
Luyao Jia,Zi Hao Guo,Longwei Li,Chongxiang Pan,Panpan Zhang,Fan Xu,Xiong Pu,Zhong Lin Wang
The electric double layer (EDL) at liquid–solid interfaces is fundamental to many research areas ranging from electrochemistry and microfluidics to colloidal chemistry. Here, we demonstrate the electricity generation by mechanically modulating the EDL at the hydrogel–dielectric polymer interfaces. It is found that contact electrification between the hydrogel and the dielectric polymer could charge the dielectric polymer surface at first; the mechanical deformation of the pyramid-shaped hydrogel results in the periodic variation of the EDL area and capacitance, which then induces an alternative current in the external circuits. This mechano-to-electrical energy conversion mechanism is then utilized to construct soft stretchable self-powered pressure sensors by designing dynamic EDL at hydrogel–dielectric elastomer interfaces. The sensitivity is optimized to 1.40 kPa–1 in the low-pressure range of 31–300 Pa by increasing the elastomer roughness. Its antifreeze performance is also improved by adding ethylene glycol into the hydrogel. The capability in detecting subtle human activities is further demonstrated. This mechano-electrical energy conversion and the corresponding self-powered sensor can be widely applied in future soft electronics.
研究领域:
材料科学
·
生物医学工程
·
软体电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-7
·
IF 5.578
Hao Qi,Wang Chenxi,Huang Hao,Li Wan,Du Deyang,Han Di,Qiu Teng,Chu Paul K.
The effectiveness of photocatalytic processes is dictated largely by plasmonic materials with the capability to enhance light absorption as well as the energy conversion efficiency. Herein, we demonstrate how to improve the plasmonic photocatalytic properties of TiO 2 /Al nano-void arrays by overlapping the localized surface plasmon resonance (LSPR) modes with the TiO 2 band gap. The plasmonic TiO 2 /Al arrays exhibit superior photocatalytic activity boasting an enhancement of 7.2 folds. The underlying mechanisms concerning the radiative energy transfer and interface energy transfer processes are discussed. Both processes occur at the TiO 2 /Al interface and their contributions to photocatalysis are evaluated. The results are important to the optimization of aluminum plasmonic materials in photocatalytic applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Energy
·
2021
·Vol. 16
·期 6
·931-942
·
IF 2.709
Sun Jing,Yu Guanqun,An Kui,Wang Wenlong,Wang Biao,Jiang Zhenyu,Sun Chenggong,Mao Yanpeng,Zhao Xiqiang,Song Zhanlong
Diverse interactions between microwaves and irradiated media provide a solid foundation for identifying novel organization pathways for energy flow. In this study, a high-energy-site phenomenon and targeted-energy transition mechanism were identified in a particular microwave heating (MH) process. Intense discharges were observed when microwaves were imposed on irregularly sized SiC particles, producing tremendous heat that was 8-fold the amount generated in the discharge-free case. Energy efficiency was thereby greatly improved in the electricity-microwaves-effective heat transition. Meanwhile, the dispersed microwave field energy concentrated in small sites, where local temperatures could reach 2000°C–4000°C, with the energy density reaching up to 4.0 × 10 5 W/kg. This can be called a high-energy site phenomenon which could induce further processes or reactions enhancement by coupling effects of heat, light, and plasma. The whole process, including microwave energy concentration and intense site-energy release, shapes a targeted-energy transition mechanism that can be optimized in a controlled manner through morphology design. In particular, the discharge intensity, frequency, and high-energy sites were strengthened through the fabrication of sharp nano/microstructures, conferring twice the energy efficiency of untreated metal wires. The microwave-induced high-energy sites and targeted energy transition provide an important pathway for high-efficiency energy deployment and may lead to promising applications.
研究领域:
能源科学
·
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Hao Yi,Zhang Yuxin,Li Jie,Guo Alan J.X.,Lv Pengfei,Wei Qufu
Developing electronic skin (e-skin) with extraordinary sensing capabilities through biomimetic strategies holds significant potential for distributed wearable electronics in the Internet of Things and human–machine interaction. However, moisture accumulation at the surface between e-skin and human skin severly affects the stability and accuracy of sensing signals. Thermal-moisture comfort and stable functional interfaces of e-skins are still great challenges that need to be addressed. Herein, inspired by the dual-sided structure of lotus leaf, we demonstrate an unidirectional water transport e-skin (UWTES) by constructing a gradient structure of porosity and hydrophilicity using one-step electrospinning thermoplastic polyurethane/poly (vinylidene fluoride-co-hexafluoropropylene) (TPU/PVDF-HFP) with an alloyed liquid metal-based (LM-Ag) electrode. A UWTES textile-based triboelectric nanogenerator (UT-TENG) exhibits a maximum open-circuit voltage, short-circuit current and power density of 188.7 V, 18.89 μA and 4.73 mW/m 2 , respectively. Additionally, a temperature visualization system for UWTES textile (TUWTES) enables real-time monitoring and displays of body temperature during intense physical activity. Through a one-dimensional convolutional neural network (1D-CNN), the gait motion recognition system achieves a highly accuracy of 99.7%. This design strategy provides new insights into the development of integrated smart textiles with improved thermal-moisture comfort and user-friendliness. Graphical
研究领域:
材料科学
·
生物医学工程
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinxing Zhou,Bo Wu,Wei Wei,Kun Wang,Kerui Li,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
The construction of high-density thermoelectric legs on flexible thermoelectric generators (F-TEG) to enhance thermal energy utilization has garnered widespread attention. However, designing an efficient spatial structure to increase the density of TE legs in F-TEG remains challenging. Inspired by the spiral configuration of nautilus shells, we have developed a novel belt-shaped flexible thermoelectric generator (BF-TEG) featuring a spiral multi-layered three-dimensional structure. This multi-layer structure not only increases the number of TE legs along the thermal gradient but also mitigates rapid heat transfer to the cold end, enabling high-performance output from the device. The BF-TEG exhibits an ultrahigh normalized Seebeck voltage of 0.518 mV/K cm −2 at a 40 K ΔT, which is double that of the state-of-the-art printed thin-film devices. Electricity can be generated directly without the need for a spacer in actual wear. Demonstrations of it powering electrochromic devices and LED bulbs show its potential as an energy supply device.
研究领域:
材料科学
·
能源技术
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2024
·
IF 14.4
Weipeng Chen,Ke Zhou,Zhixin Wu,Linsen Yang,Yahui Xie,Xue Meng,Ziguang Zhao,Liping Wen
Conventional solid ion channel systems relying on single one- or two-dimensional confined nanochannels enabled selective and ultrafast convective ion transport. However, due to intrinsic solid channel stacking, these systems often face pore–pore polarization and ion concentration blockage, thereby restricting their efficiency in macroscale ion transport. Here, we constructed a soft heterolayer-gel system that integrated an ion-selective hydrogel layer with a water-barrier organogel layer, achieving ultrahigh cation selectivity and flux and effectively providing high-efficiency gradient energy conversion on a macroscale order of magnitude. Specifically, the hydrogel layer featured an unconfined 3D network, where the fluctuations of highly hydrated polyelectrolyte chains driven by thermal dynamics enhanced cation selectivity and mitigated transfer energy barriers. Such chain fluctuation mechanisms facilitated ion-cluster internal transmission, thereby enhancing ion concentration hopping for more efficient ion-selective transport. Compared to the existing rigid nanochannel-based gradient energy conversion systems, such a heterogel-based power generator exhibited a record power density of 192.90 and 1.07 W/m2 at the square micrometer scale and square centimeter scale, respectively (under a 500-fold artificial solution). We anticipate that such heterolayer gels would be a promising candidate for energy separation and storage applications.
研究领域:
材料科学
·
能源工程
·
化学工程
✓ 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）