CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Bin Zhang,Xiao-ming Chen,Wen-wen Wu,Amir Khesro,Peng Liu,Minmin Mao,Kaixin Song,Rong Sun,Dawei Wang
Dielectric polymer nanocomposite films have been widely studied because of their high polarization and electric breakdown strength, leading to high discharge energy density (U d ). However, nanocomposites with high U d often show low discharge energy efficiency (η). In order to achieve both high U d and η simultaneously, a series of novel bilayer polymer nanocomposite films composed of pure polyetherimide (PEI) layer and BaTiO 3 -dispersed poly(1,1-difluoroethylene) (BT/PVDF) layer were prepared by hot-pressing method in this work. The bilayer composites exhibit high η > 84% at 600 MV⋅m −1 , which are much larger than most reported values (η < 70%). Specially, the highest η of 84.48% and U d of 8 J·cm −3 at 600 MV·m −1 were obtained for the bilayer films composed of PEI and 3 vol% BT/PVDF layers, which is promising for pulsed power applications.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Cheng Han,Lirong He,Qi Wang,Chuhong Zhang
Three-dimensional (3D) printing technologies possess incomparable advantages in fabricating 3D piezoelectric devices, enhancing the mechanical-to-electrical conversion efficiency. Among them, direct ink writing (DIW) holds great promise in constructing piezoelectric polymer devices as it enables self-polarization benefiting from the alignment of dipoles induced by the high pressure during the printing process. Besides, the electroactive phase of piezoelectric polymers is retained due to the operation is under ambient conditions. However, for the generally applied solvent-evaporation-assisted DIW technique, the architected structure suffers from drastic shrinkage and warpage in the final parts, which ultimately leads to a significant deviation from the programmed measure. In this work, for the first time, we develop a solvent-exchange-assisted DIW printing strategy to architect accurate and stable 3D PVDF PEH. This solvent exchange process in water not only enables the complete retaining of filament measure and generation of micropores to amplify the stain but also promotes the PVDF crystallization and formation of the β-phase. Moreover, trace vitamin B2 is formulated into the ink, affording self-polarized high β-phase content (95%) PVDF with good printability and optimal storage modulus to hold the 3D shapes. As a result, the 3D printed PVDF delivers an output voltage of 17.8 V, increased by 304% compared with device fabricated by solvent-evaporation-assisted DIW technique, and an impressive area output voltage density (11.04 V cm–2) which is twice that of the reported DIW printed PVDF PEH. This facile approach demonstrates a potential roadmap to high performance PEH through exploring complex 3D geometries enabled by the solvent-exchange-assisted 3D printing technique.
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
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 12
·3479-3485
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IF 6.641
Xiaole Yu,Yudong Hou,Haiyan Zhao,Jing Fu,Mupeng Zheng,Mankang Zhu
Based on the strong requirement for self-powered devices, energy harvesting by utilizing piezoelectric materials has recently attracted extensive attention. Transduction coefficient (d33·g33) is the core parameter of the piezoelectric energy harvesting materials, which is directly determined by the ratio of the piezoelectric charge constant (d33) to the dielectric constant (εr). Unfortunately, traditional solid solution design method generally causes a simultaneous increase or decrease in both d33 and εr, making it difficult to obtain a high d33·g33. In this work, a composite design strategy was proposed to separate the synergistic change of d33 and εr. This was achieved by introducing lower-εr ZnAl2O4 secondary phase into the popular 0.2Pb(Zn1/3Nb2/3)O3–0.8Pb(Zr1/2Ti1/2)O3 (PZN–PZT) perovskite matrix. Encouragingly, the εr value rapidly decreased, while d33 value improved within a certain range compared to those of pure PZN–PZT. This was ascribed to the formation of fine domain structures in composites caused by the heterogeneous interfacial effect. Subsequently, the cantilever beam type piezoelectric energy harvesters (PEHs) made from the optimal composites exhibited a high power density of 4.0 μW mm−3 at 1 g acceleration. More importantly, PEHs could harvest vibrational energy from the operating motor to charge a capacitor and instantly drive wireless micro-sensors, demonstrating their potential application in self-powered electronics. Under the guide of the composite design strategy proposed in this work, more high performance piezoelectric energy harvesting materials can be built in the future.
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
NANO LETTERS
·
2025
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IF 9.1
Wei Deng,Yufeng Zhu,Kelan Zhang,Yuxuan Yuan,Tao Hu,Xiao Wang,Jidong Li,Xuemei Li,Zhuhua Zhang,Wanlin Guo,Jun Yin
Collective behavior enables groups of organisms to achieve feats far exceeding individual capability. Inspired by this, we present a novel droplet-based electricity generator that leverages the collective dynamics of multiple water droplets to significantly enhance electrical output, achieving orders of magnitude improvement compared with single-droplet devices. It is revealed that grouped water droplets, although spatially separated, coordinate via charge exchange with a solid surface and external charge transfer. Consequently, the solid surface charge density is significantly enhanced, elevating the charge transfer. This collective effect readily generates peak voltages exceeding one kilovolt, sufficient for air ionization and nitrogen fixation, with potential applications in nutrient production. We anticipate that this collective strategy will significantly advance the design and applications of droplet-based hydrovoltaic devices.
研究领域:
能源科学
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材料科学
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物理学
✓ 已验证
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 6
·期 3
·693-699
·
IF 6.367
Chao Chang,Xiaoyu He,Zhaoyang Han,Lilin Pei,Zongyu Wang,Yulong Ji
Developing energy harvesting and conversion technology is of great significance to mitigate the energy crisis and realize the sustainable development of human society. In this work, we designed and fabricated a thermal energy harvesting and conversion device by integrating a tube-based triboelectric nanogenerator (TENG) into a copper oscillating heat pipe (OHP). The tube-based TENG was composed of two copper electrodes uniformly distributed along a polytetrafluoroethylene (PTFE) tube. The copper OHP with an inner diameter of 2 mm had 6 turns and deionized water (DI) was chosen as the working fluid. When thermal energy was added to the OHP, liquid plugs in the OHP were thermally excited and flowed into the PTFE tube, resulting in the generation of an alternating flow of electrons between the two electrodes. This TENG-OHP system successfully generated more than 7.0 V of open-circuit voltage and more than 0.32 μW of output power. The generated electrical energy can be used to power many small electronics, such as capacitors and light-emitting diodes (LEDs). Therefore, these findings will offer an alternative approach to harvest and convert thermal energy heat in many devices or systems that involve the heat generation and heat transfer process.
研究领域:
能源技术
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材料科学
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热力学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Ting Wang,Tuo Ji,Weilin Chen,Xiaohong Li,Wei Guan,Yun Geng,Xinlong Wang,Yangguang Li,Zhenhui Kang
The conversion of low-value natural environmental energy into the clean and high-value electricity provides a promising approach for solving the energy crisis and environmental pollution. Using one device to directly convert all-weather environmental energy into electricity is an ideal goal and still remains a great challenge. Here, we assembled a simple and multifunctional device with the polyoxometalate (POM)/ethyl cellulose composite film on metal substrate, which generates electricity from multiple low-value all-weather environmental energy, including sunlight, wind and raindrops. For example, the optimal Mo 72 Cr 30 /ethyl cellulose composite film (Mo 72 Cr 30 wt% = 71.4%) exhibits remarkable output performance with the responsivity of 176.3 μA W −1 under AM 1.5 G solar light, an average output of 4.48 μW m −2 from wind at a speed of 10 m s −1 , and an average output of 0.25 μW m −2 from raindrops at a dripping rate of 7 mL min −1 , as well as the better output power density of 6.32 μW m −2 , 0.54 μW m −2 and 8.71 μW m −2 simultaneously driven by sunlight and wind, sunlight and raindrops, wind and raindrops, respectively. It also achieves an average output power density of 17.7 μW m −2 , as well as long-term durability when it is simultaneously driven by sunlight, wind and raindrops, which exhibits 4 and 70 times than single wind and raindrops condition. For this composite film, the maximum power density is achieved at a very low resistance load of about 10 Ω. The output power arises from the high efficient transport of photo-generated electrons and electrostatic charges from Mo 72 Cr 30 to metal substrate.
研究领域:
材料科学
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能源研究
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
·
IF 5.107
Jian Liu,Ming Xia,Rong Chen,Xun Zhu,Qiang Liao,Dingding Ye,Biao Zhang,Wei Zhang,Youxu Yu
Photocatalytic fuel cell (PFC) is a promising wastewater treatment technology, which cannot only purify wastewater but also generate electricity using solar energy. In this study, a membrane-less visible-light responsive micro PFC was developed, where the CdS/ZnS-TiO 2 deposited on a conductive glass as a photoanode and CuO deposited on the porous carbon paper as an air-breathing photocathode were laterally arranged. Such design allows for both the photoanode and photocathode to be irradiated simultaneously from one side and enhances photon and mass transport. It was found that the developed micro PFC with dual photoelectrodes well responded to light illumination and exhibited good long-term performance. Experimental results also showed that upgrading the light intensity and methanol and electrolyte concentrations could improve the discharging performance because of larger amount of generated electron-hole pairs and more hole scavengers resulting from the enhanced transport. Besides, it was also found that although the increase of the liquid flow rate from extremely low rate to a moderate one caused the residence time to be lowered, positive contribution resulting from enhanced mass transport was more significant, leading to the improved performance. However, too high liquid flow rate resulted in critical low residence time, which made the discharging performance worse. The feasibility of the developed micro PFC with dual photoelectrodes toward the applications of using solar energy to remove organic pollutants contained in wastewater and simultaneously generate electricity is demonstrated in this work.
研究领域:
环境科学
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能源技术
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材料科学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Dan Zhang,Yan Ren,Xia Fan,Jin Zhai,Lei Jiang
Natural sunlight is one kind of renewable energy that is considered likely to be ubiquitous at the river-sea junction. Ingeniously engineering a photoassisted enhanced electricity capture facility based on an artificial nano-porous membrane, is a necessity. Herein, a proof-of-concept system is constructed, wherein cation-selective photoresponsive porphyrin/alumina nanochannels are entrusted with cationic selectivity and extraordinary photoelectric response, thus it is available to synergistically convert salinity gradient and solar energy into high electric energy. Depending solely on excellent cationic selectivity of nanochannels, the salinity-gradient-driven membrane system can capture high power output of 2.16 W/m 2 . And harvested power of the generator with the help of photo is elevated to 4.56 W/m 2 . Resulted total transmembrane ionic current ( I total ) is traceable to a smooth cooperative effort of diffusion current ( I diff ) and photo-induced ionic current ( I photo ). Benefiting from the accumulation characters of ionic current, the electricity generator with the modulation of concentration gradient and varying-intensity photo stimulus can achieve a multivalued conduction including current and power increase. The general nanofluidic system paves the way for other multi-functional membranes that simultaneously utilize various clean sources to potentially improve entire electricity output.
研究领域:
纳米科技
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能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Pengchao Si,Mengqi Li,Xiang Wang,Feifei Sun,Jingjing Liu,Qinhuan Wang,Fuqiang Ren,Haoran Kong,Yu Wang
The energy conversion process caused by relative motion of droplets and nanofilms has aroused widespread attention. However, the mechanism is still unclear, especially regarding the modification of the nanomaterial itself. In this study, we found that by annealing TiO2 in a H2 atmosphere at different temperatures, the Magnéli phase titanium suboxide can be prepared with a lot of oxygen vacancies. Oxygen vacancies not only form negative charge centers inside the film, which enhance the attraction of Na+, but also increase the carrier concentration. By increasing the oxygen vacancy concentration, the measured VOC value was increased by ∼5 times and ISC by ∼30 times. Furthermore, a universal film preparation process was developed for the large-scale production of flexible energy conversion units based on the simple sol–gel method. Experimental results show that the prepared energy conversion unit has excellent performance of collecting rainwater energy and show a stable and continuous VOC output of ∼600 mV, combined with the surface hydrophobic treatment technology.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 32
·17112-17124
·
IF 11.9
Kai Han,Dadong Zhang,Wenbo Zhuang,Yanfen Wan,Peng Yang
Wearable sweat biosensors, as the only noninvasive and measurable body-fluid sensors, serve as a very important means to monitor an individual’s health status and more dynamic molecular-level information. The pursuit of wearable sweat biosensors includes not only detecting sweat components, but also integrating multiple functions, such as sweat-based health monitoring, near-field transmission and being self-powered. In this paper, we firstly bring forth a new idea of integrating sweat monitoring and dual electrical generation (hydrovoltaic and moisture electricity generation) for a multifunctional flexible device as a sweat-based health monitoring electronic (E)-skin. Herein, besides sweat composition analysis, a hydrovoltaic electricity generator is employed to detect the amount of sweat for the first time, and a dual electricity generator is used for self-supply of energy and skin-surface temperature measurement. Synergistic tandem nanogenerators are constructed using biomass carbon materials, and the power generation voltage can reach about 500 mV and is relatively stable. Our sweat E-skin (SE-skin) has five main functional areas, realizing real-time monitoring of sweat volume, sweat composition analysis‚ skin-surface temperature measurement and power-supply functions. This new integrated design not only enables real-time monitoring of indicators of health in sweat, but also provides a new idea for future intelligent wearables for human beings.
研究领域:
生物医学工程
·
可穿戴设备
·
纳米发电机
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Jingfeng Liu,Yinghao Shang,Zhuzhu Shao,Xingang Liu,Chuhong Zhang
The piezoelectric energy harvester (PEH) has attracted huge attention as an eco-friendly way to harvest mechanical energy for self-powered system. Structural design is crucial for optimizing the energy conversion efficiency of PEHs, especially some specialized three-dimensional (3D) structures as theoretically predicted. However, there are few reports guiding from the simulation to the real construction of high performance PEHs, and it is usually difficult to use traditional processing methods to realize customized 3D designate structures. Herein, the fused deposition modeling (FDM) 3D printing technique is developed to architect four customized 3D PVDF PEHs, and the relationship between the designed structures and corresponding piezoelectric output performances are systematically studied by theoretical simulation. The results show that, with a decreased force-bearing area, the effective deformation of the PEHs along the vertical direction increases, resulting in an excellent piezoelectric output. Thus, the optimal 3D conus arrayed PEH shows the highest piezoelectric output voltage of 8.69 V and current of 90.8 nA, which is about 2.75 times higher than that of the cylinder arrayed one. Additionally, the conus arrayed PEH can fast charge a 1 μF capacitor to 2.5 V within 100 s. This work manifests 3D printing as a powerful tool to reconcile the simulation and architecting for 3D PEHs with enhanced output performance for futuristic self-powered systems.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Nano
·
2014
·
IF 12.033
Junwen Zhong,Yan Zhang,Qize Zhong,Qiyi Hu,Bin Hu,Zhong Lin Wang,Jun Zhou
Smart garments for monitoring physiological and biomechanical signals of the human body are key sensors for personalized healthcare. However, they typically require bulky battery packs or have to be plugged into an electric plug in order to operate. Thus, a smart shirt that can extract energy from human body motions to run body-worn healthcare sensors is particularly desirable. Here, we demonstrated a metal-free fiber-based generator (FBG) via a simple, cost-effective method by using commodity cotton threads, a polytetrafluoroethylene aqueous suspension, and carbon nanotubes as source materials. The FBGs can convert biomechanical motions/vibration energy into electricity utilizing the electrostatic effect with an average output power density of ∼0.1 μW/cm2 and have been identified as an effective building element for a power shirt to trigger a wireless body temperature sensor system. Furthermore, the FBG was demonstrated as a self-powered active sensor to quantitatively detect human motion.
研究领域:
可穿戴设备
·
能源技术
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）