Nano Energy
·
2022
·
IF 19.069
Xuemei Zhang,Qianxi Yang,Peiyuan Ji,Zhifei Wu,Qianying Li,Huake Yang,Xiaochuan Li,Guocan Zheng,Yi Xi,Zhong Lin Wang
Wave energy collector (WEC) based on triboelectric nanogenerator (TENG) (W-TENG) is excellent candidate in complex marine environments. However, the improvement of energy conversion efficiency and understanding of motion mechanisms of W-TENG were limited due to the lack of theoretical basis. Here, based on the theory of hydromechanics, an energy conversion model is proposed to unveil the energy conversion mechanism and interaction mechanism between W-TENG (solid) and water wave (liquid) during the wave energy harvesting process. An inverted pendulum-typed multilayer triboelectric nanogenerator (IPM-TENG) is developed to capture water wave energy in weak wave environment (wave height: 2–13 cm, wave frequency: 0.5–1.25 Hz). Guided by the theoretical model and hydrodynamic experiments, the structural parameters and output performance of the device are further optimized. Most importantly, the available energy conversion efficiency of the optimized device is up to 14.5%. Furthermore, the optimized IPM-TENG can serve as a console for the ‘on demand’ release of pesticides to promote the development of self-powered smart agriculture. This work can not only provide guidance for the design and energy conversion efficiency improvement of future blue energy harvesting devices, but also accelerate the commercial rollout and practical application of W-TENG.
研究领域:
海洋能源
·
纳米技术
·
流体力学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Yuqiang Ma,Cong Zhang,Jiachen Li,Chi Zhang,Haixia Ma
Oxygen evolution reaction (OER) is central to efficient hydrogen production . Replacing OER with thermodynamically more favorable anodic oxidation reaction can effectively improve the energy conversion efficiency in overall water splitting (OWS). Here, a new coupling system of green electro-oxidation synthesis of CuN 3 primary explosive energetic materials and energy-saving hydrogen production is introduced. The cathodic catalyst is prepared by a two-step hydrothermal reaction to load ruthenium nanoparticles (Ru NPs) on the surface of three-dimensional (3D) molybdenum sulfide nanosheets (MoS 2 -NSs), and shows superior alkaline hydrogen production (HER) activity. Theoretical calculations reveal that the introduction of Ru NPs would induce local electron redistribution of in-plane MoS 2 and optimize the adsorption capacity of the intermediates. The electro-oxidation synthesis of CuN 3 energetic materials coupled with cathodic HER significantly reduce the cell voltage to only 1.07 V with current density of 10 mA cm −2 , allowing low-energy-consumption hydrogen production. Meanwhile, the green electrosynthesis of CuN 3 avoids generation of high-risk HN 3 gas, high temperature, and long reaction time in the traditional method. This study demonstrates a new strategy of green electrosynthesis of primary explosive and energy-saving hydrogen production.
研究领域:
材料科学
·
化学工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Zhuanpei Wang,Jianli Cheng,Hui Huang,Bin Wang
Fiber-shaped photocapacitors (FPCs) combine functions of energy harvesting and storage in a single device has attracted great attention for their potential applications in portable and wearable electronics . However, the FPCs suffer from the low photochemical-electric energy conversion efficiency and poor cycling stability due to the limitation of the fiber-shaped electrodes. Herein, high crystalline conductive polymer fibers with high electrocatalytic activity and energy storage efficiency for both energy harvest and energy storage are prepared and used as shared electrode to fabricate efficient and stable FPCs. Synergistically, the FPCs fabricated by combining a fiber-shaped dye-sensitized solar cell and a fiber-shaped supercapacitor into one device by sharing one electrode exhibit a remarkable total photochemical-electric energy conversion efficiency up to 5.1%, which is higher than that of reported energy fibers and even close to those of the planar devices in previous reports. Meanwhile, the fabricated FPCs show superior cycling capability for more than 1700 photocharge/galvanostatic discharge cycles (63 days) with efficiency retention of 70.6%. The FPCs woven into the textile can steadily power the ultraviolet photodetector after photocharged in natural sunlight, showing potential in the application of wearable electronics.
研究领域:
能源材料
·
纳米科技
·
电子工程
✓ 已验证
DOI
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 13
·5321-5327
·
IF 8.067
Wenjing Zhai,Lin Huang,Xiaomin Cui,Guangyuan Li,Zhihang Zhang,Peizhuo Chen,Yongqiang Li,Yuxia Tang,Lin Lin,Zhibo Yan,Jun-Ming Liu
Lead-free halide perovskites have great potential as stable and nontoxic optoelectronic materials. As a promising photovoltaic candidate, AgBiI4 has attracted attention due to its eco-friendly properties and strong stability, but the energy conversion efficiency (PCE) is still low and more effort towards improving the film quality is needed for photovoltaic applications. Here, we synthesized AgBiI4 films by antisolvent treatments with chlorobenzene (CB), toluene (TL), and isopropanol (IPA), respectively, and the corresponding solar cells of ITO/SnO2/AgBiI4/PTAA/Au were fabricated. Our data indicate that the IPA-treated AgBiI4 film has better microstructural quality and higher photovoltaic performance than the other-treated films. Furthermore, the PCE of the cells is enhanced from 0.82% to 1.61% upon IPA-treatment. This study suggests that besides a suitable relative polarity, an antisolvent with a lower boiling point and a higher miscibility with the host solvent is preferred in improving the AgBiI4 film quality and enhancing the photovoltaic performance of AgBiI4-based solar cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenlong Ji,Ruixin Ma,Shina Li,Haojie Sun,Yanran Li,Kang Li
Indium tin oxide (ITO) is a promising transparent electrode material for stable and highly efficient perovskite solar cells (PSCs). However, further improvement in ITO performance critically constrains the stability and efficiency enhancement of PSCs. Although many doping strategies were carried out to enhance the performance of ITO, most of these ITO have not been further investigated as transparent electrodes for PSCs. In this study, niobium-doped ITO (ITO:Nb) transparent electrodes were deposited via magnetron sputtering at varying sputtering powers, and their influence on PSC device performance was investigated. The doping of Nb can change the band structure of ITO to present superior energy level alignment, which facilitates carrier transport. By adjusting the sputtering power, we found that ITO:Nb films deposited at 70 W showed a uniform, dense morphology with low surface roughness. These films achieved optimal photoelectric performance, with a resistivity of 3.12 × 10 −4 Ω·cm and an average transmittance of 90.00 %. Moreover, the PSC based on ITO:Nb transparent electrodes exhibits excellent efficiency and stability, achieving a power conversion efficiency of 22.26 % and retaining 85.38 % of its initial efficiency after 80 days of aging in unencapsulated ambient conditions. This work proposes a novel strategy for designing transparent electrodes, enhancing the efficiency and stability of PSCs.
研究领域:
材料科学
·
可再生能源
·
光电子学
·
薄膜技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Hongyu Li,Chris R. Bowen,Ya Yang
Pyroelectric materials are of interest for waste heat utilization and thermal detection. However, the low output current and inefficiency reduces their effectiveness. Here, we utilize the abrupt decrease in polarization of ferroelectric BaTiO 3 materials around Curie temperature to improve the output performance of a pyroelectric nanogenerator. The variation of the polarization leads to a large change in the density of surface free charges, resulting in an increase of pyroelectric current. We have designed a temperature control and recording system to realize direct measurement of the pyroelectric output current. The pyroelectric current, power and energy conversion efficiency of the device near the Curie temperature were measured to be 15.6-fold, 18-fold and 15.8-fold higher than those acquired near room temperature. Moreover, the temperature induced current and charge density enhancement can be applied to detect temperature and temperature change. The responsivity of the self-powered temperature sensor near T c is 120 nC/cm 2 ∙K, which 4.8 times higher than that near room temperature (25.1 nC/cm 2 ∙K). The results confirmed the ability to exploit a ferroelectric phase transition for pyroelectric performance enhancement.
研究领域:
材料科学
·
能源技术
·
传感器技术
✓ 已验证
DOI
高影响因子
Solar RRL
·
2019
·Vol. 3
·期 4
·1800354
·
IF 0
Zheng-Ji Zhou,Yue-Qing Deng,Pan-Pan Zhang,Dong-Xing Kou,Wen-Hui Zhou,Yue-Na Meng,Sheng-Jie Yuan,Si-Xin Wu
All-inorganic CsPbBr 3 perovskite solar cells (PSCs) have recently generated tremendous interest in next-generation cost-effective and stable photovoltaic devices. However, the commonly used costly and unstable organic hole transporting material (HTM) has so far prevented the further development and large-scale application of PSCs. In this work, Cu 2 ZnSnS 4 quantum dots (CZTS QDs) are exploited as a novel inorganic HTM for CsPbBr 3 PSCs. Due to the well-matched energy levels with the inorganic perovskite layer, a decent power conversion efficiency of 4.84% is achieved, which is quite comparable to the efficiency of the traditional device based on spiro-OMeTAD HTM (5.36%). Moreover, the photoluminescence (PL) and impedance spectroscopy further demonstrate the more effective hole extraction and transfer properties of the CZTS QDs interface layer, making it a promising material for fabricating efficient and stable PSCs toward practical applications.
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
产品关联
DOI
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Yan Xiang,Zhu Ma,Jia Zhuang,Honglin Lu,Chunyang Jia,Junsheng Luo,Haimin Li,Xiaowei Cheng
The tactics of ion doping in metal oxide is normally used to improve the film quality, achieve an appropriate energy band, and enhance carrier mobility. Here, a rare earth element (samarium) was doped into TiO2 compact electron transport layers (ETLs) by adding samarium trinitrate into the titanium precursor solution. The results show that perovskite solar cells (PSCs) with Sm-doped TiO2 exhibit 10.3% enhancement with a power conversion efficiency (PCE) of 14.10%, compared to nondoped devices. It is found that Sm doping can upward shift the Fermi energy level of the ETLs, increase the carrier transport ability, and inhibit the carrier recombination. The results indicate that rare earth ion doping could be a promising method for producing effective ETLs and high performance PSCs.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2023
·
IF 12.4
Siyuan Lin,Zhenxing Fang,Jiao Ma,De'en Guo,Xiaohan Yu,Haipeng Xie,Mei Fang,Dou Zhang,Kechao Zhou,Yongli Gao,Conghua Zhou
“Perovskite/carbon” interface is a bottle-neck for hole-conductor-free, carbon-electrode basing perovskite solar cells due to the energy mismatch and concentrated defects. In this article, in-situ healing strategy is proposed by doping octylammonium iodide into carbon paste that used to prepare carbon-electrode on perovskite layer. This strategy is found to strengthen interfacial contact and reduce interfacial defects on one hand, and slightly elevate the work function of the carbon-electrode on other hand. Due to this effect, charge extraction is accelerated, while recombination is obviously reduced. Accordingly, power conversion efficiency of the hole-conductor-free, planar perovskite solar cells is upgraded by ≈50%, or from 11.65 (± 1.59) % to 17.97 (± 0.32) % (AM1.5G, 100 mW cm −2 ). The optimized device shows efficiency of 19.42% and open-circuit voltage of 1.11 V. Meanwhile, moisture-stability is tested by keeping the unsealed devices in closed chamber with relative humidity of 85%. The “in-situ healing” strategy helps to obtain T 80 time of >450 h for the carbon-electrode basing devices, which is four times of the reference ones. Thus, a kind of “internal encapsulation effect” has also been reached. The “in situ healing” strategy facilitates the fabrication of efficient and stable hole-conductor-free devices basing on carbon-electrode.
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
DESALINATION
·
2023
·
IF 9.9
Weiming Sun,Zhongbao Liu,Yimo Liu,Zepeng Wang
Solar-driven interfacial evaporation technology has immense potential in addressing the global challenge of freshwater scarcity. Currently, most solar interface evaporators have complex and costly manufacturing processes, hindering practical applications. Additionally, in many solar distillation systems, the evaporation and condensation processes occur within the same space. This causes sunlight to be scattered or absorbed by the water droplets on the transparent surface, thereby reducing the solar energy reaching the evaporator, the high internal humidity ratio further hinders water evaporation . Therefore, we developed a cost-effective polyvinyl alcohol/carbon black hydrogel (PCH) with a simple fabrication process. PCH achieves an evaporation rate of 1.54 kg m −2 h −1 and an energy conversion efficiency as high as 90.5 % under 1 sun (1 kW m −2 ). Furthermore, we have introduced a novel solar-driven low-vacuum interfacial distillation system (SLIDS) that separates the evaporation and condensation processes into distinct spaces and employs the principle of low pressure to enhance water evaporation. The condensate yield rate of the SLIDS was 1.46 kg m −2 h −1 , which is 2.2 times higher than traditional system under 1 sun. This increase in the condensate yield rate by 41.6 % was achieved through the introduction of low-pressure conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoyu Wang,Huajie Xu,Shuanghong Wu,Yang Wang,Yan Wang,Xiaohui Wang,Xiaodong Liu,Peng Huang
The CsPbI 2 Br material has gained recognition as an exceptional candidate for both single- and multi- junction solar cells due to its remarkable thermal and light stability, along with its suitable band gap. However, despite these inherent advantages, CsPbI 2 Br perovskite solar cells (PSCs) still encounter significant energy losses, which impede the further enhancement of their efficiency. Although various approaches involving additives and interface engineering techniques improved device performance, the influence of these methods on the perovskite lattice is frequently overlooked. Herein, synergistic lattice regulation through the combination of potassium acetate (KAc) as electron interface layer and methylammonium chloride (MACl) as perovskite additive, was proposed. The MACl dopant effectively increases the crystallinity and grain size of CsPbI 2 Br film by retarding the crystallization rate of perovskite, resulting in the enhancement in short-circuit current density ( J sc ) of PSCs. Unfortunately, unlike the behavior observed in inorganic–organic perovskites, the introduction of Cl‾ from MACl into the interstitial positions leads to lattice expansion in CsPbI 2 Br, resulting in reduced open-circuit voltage ( V oc ) and fill factor (FF). However, the incorporation of K + replacing Cs + effectively mitigates lattice distortion phenomena. Consequently, the CsPbI 2 Br PSCs, benefiting from the complementary effects of the MACl additive and KAc interfacial layer, exhibit an outstanding champion power conversion efficiency of 17.11 %. This research offers profound insights into the impact of ions introduced through additive and interface engineering on perovskite lattice stress.
研究领域:
材料科学
·
光伏技术
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
Joule
·
2024
·
IF 38.6
Xingcheng Li,Shuang Gao,Xin Wu,Qi Liu,Leilei Zhu,Chenyue Wang,Yangkai Wang,Zheng Liu,Wenjing Chen,Xinyu Li,Peng Xiao,Qiuping Huang,Tao Chen,Zhenyu Li,Xingyu Gao,Zhengguo Xiao,Yalin Lu,Xiaocheng Zeng,Shuang Xiao,Zonglong Zhu,Shangfeng Yang
Crystallization orientation and the buried interface have been proven to be key factors determining the efficiency of perovskite solar cells (PSCs). Here, we report a facile strategy to concomitantly induce (100)-oriented perovskite and improve buried interface by incorporating a bifunctional ligand 2-(methylthio) ethylamine hydrochloride (METEAM) into perovskite precursor solution. METEAM molecules preferentially adsorb on (100) facets of perovskite via strong interactions with perovskite lattice to induce oriented perovskite crystallization. Meanwhile, METEAM molecules spontaneously aggregate at the buried interface and operate as a bridge between the perovskite and tin oxide (SnO 2 ) electron transport layer to bidirectionally passivate their defects. As-prepared perovskite films exhibit suitable energy level and high mobility for interfacial charge transfer, low trap state density, and long carrier lifetime. The resultant conventional-structure PSC devices deliver a power conversion efficiency (PCE) of 26.1% (certified 25.8%) with improved operational and ambient stabilities, which is among the highest PCE of conventional PSCs.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）