Solar Energy Materials and Solar Cells最新文献_第2页

Numerical investigations on heat release performance of phase change mixture of paraffin and water 石蜡与水相变混合物放热性能的数值研究

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113266

Xinyu Huang , Yuanji Li , Liu Lu , Xinyu Gao , Xiaohu Yang , Ming-Jia Li

Based on the incompatibility of water and paraffin and the high thermal conductivity of water, a novel phase change energy storage structure is constructed. The structure is filled with water at the bottom and phase change material at the top. The contact phase transition region is developed using water by numerical method, and the influence of different bottom water volumes on the heat release process of the whole energy storage unit is studied. The results show that the pure PCM unit can ignore the existence of natural convection in the middle and late stages of heat release, and there is a refractory zone at the end of solidification. Increasing the amount of water at the bottom is conducive to the combination of water and paraffin, thus accelerating the solidification of paraffin. This adjustment also causes the cold capacity at the heat source absorption to continue to increase, resulting in a faster drop in the overall water temperature and a more prominent heat transfer effect on paraffin. In Case 3 and Case 5, when the water height is 5.0 mm and 10.0 mm, the solidification time is shortened by 46.57 % and 66.67 %, respectively, compared with Case 1. In addition, the total heat release in Case 3 and Case 5 is reduced by 4.27 % and 9.56 %, respectively, compared with Case 1, indicating that the reduction in total heat energy is relatively small. The further gradient structure design shows that the positive gradient structure is beneficial in increasing the average heat release rate of the unit and reducing the solidification time of the unit.

根据水和石蜡的不相容性以及水的高导热性，构建了一种新型相变储能结构。该结构底部填充水，顶部填充相变材料。通过数值方法利用水开发了接触相变区，并研究了不同底部水量对整个储能装置放热过程的影响。结果表明，纯 PCM 单元在放热中后期可以忽略自然对流的存在，在凝固末期存在耐火区。增加底部水量有利于水和石蜡的结合，从而加速石蜡的凝固。这种调整也会使热源吸热处的冷量继续增加，从而使整体水温下降更快，对石蜡的传热效果更加突出。在工况 3 和工况 5 中，当水的高度分别为 5.0 毫米和 10.0 毫米时，凝固时间比工况 1 分别缩短了 46.57 % 和 66.67 %。此外，与情况 1 相比，情况 3 和情况 5 的总放热量分别减少了 4.27 % 和 9.56 %，表明总热能的减少量相对较小。进一步的梯度结构设计表明，正梯度结构有利于提高装置的平均放热率和缩短装置的凝固时间。

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引用次数: 0

Optimal design of low-emissivity coatings 低辐射涂层的优化设计

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113267

Jacob Wurm , Samuel Tyler Fujisawa-Phillips , Ilia L. Rasskazov

We report a comprehensive numerical study demonstrating surprisingly good photoenergetic performance of low-emissivity (low-E) coatings comprised of just 5 layers. Simulations are performed within the transfer-matrix framework in conjunction with multiobjective optimization using a genetic algorithm. We show that upon utilization of conventional dielectric materials with only one silver layer, all that arranged in a multilayered stack with optimal thickness, large light-to-solar gain (LSG) ratio and visible transmittance (VT) up to 2.4 and 0.72, respectively, with neutral color (

a^{*} = - 3 \pm 1

and

b^{*} = - 5 \pm 1

in CIELAB color space) can be achieved. Such an outstanding behavior of single-metal glazing is explained by the emergence of open Fabry-Pérot cavity (so-called pseudo-cavity), the unusual concept for the low-E industry centered around conventional metal-dielectric-metal Fabry-Pérot cavities. Our work highlights the importance of large-scale computational optimization for the design of efficient low-E coatings and provides a useful guide for future developments in this field.

我们报告了一项全面的数值研究，结果表明仅由 5 层组成的低辐射（low-E）涂层具有令人惊讶的良好光能性能。模拟在传递矩阵框架内进行，同时使用遗传算法进行多目标优化。结果表明，在使用只有一层银层的传统电介质材料时，所有银层都能以最佳厚度排列成多层叠层，从而实现较大的光太阳增益（LSG）比和可见光透过率（VT），分别高达 2.4 和 0.72，并具有中性色彩（在 CIELAB 色彩空间中，a∗=-3±1 和 b∗=-5±1）。单金属玻璃如此出色的性能可以用开放式法布里-佩罗空腔（所谓的伪空腔）的出现来解释，这对于以传统金属-电介质-金属法布里-佩罗空腔为中心的低辐射工业来说是一个不同寻常的概念。我们的工作凸显了大规模计算优化对设计高效低辐射涂层的重要性，并为该领域的未来发展提供了有益的指导。

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引用次数: 0

NaCl-KCl-CaCl2 molten salts for high temperature heat storage: Experimental and deep learning molecular dynamics simulation study 用于高温储热的 NaCl-KCl-CaCl2 熔盐：实验和深度学习分子动力学模拟研究

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113275

Xianqing Liu , Fei Liang , Shule Liu , Gechuanqi Pan , Jing Ding , Jianfeng Lu

The thermal energy storage system based on molten salts plays a crucial role in renewable energy utilization and power grid regulation system. This article investigates NaCl-KCl-CaCl₂ molten salts for high temperature heat storage by experimental measurement and deep learning molecular dynamics simulations. The phase transition, thermal stability, and thermophysical properties of NaCl-KCl-CaCl₂ were experimental analyzed, and the results indicate that it has high enthalpy of 251.37 J/g, with observable evaporation at temperatures above 1103 K. An accurate deep potential model was further trained based on ab initio molecular dynamics data, achieving a root mean square error of 0.50 meV/atom for energy and 15.31 meV/Å for force, and the experimental and computational results for density and viscosity have discrepancies of less than 5 %. Based on experimental and simulation data, correlation equations for thermophysical properties of NaCl-KCl-CaCl₂ were conducted, and thermal performance changes with temperature were further explained from the perspective of structural changes. As the temperature rises, all ionic pairs transfer to lower coordination numbers and disperse into smaller clusters, which results in the decreases of density, thermal conductivity and viscosity, and the stability of molten salt gradually decreases as the energy barriers for ion pairs dropping.

基于熔盐的热能存储系统在可再生能源利用和电网调节系统中发挥着重要作用。本文通过实验测量和深度学习分子动力学模拟，研究了用于高温储热的NaCl-KCl-CaCl2熔盐。实验分析了NaCl-KCl-CaCl2的相变、热稳定性和热物理性质，结果表明其热焓高达251.37 J/g，在1103 K以上温度可观察到蒸发现象。基于ab initio分子动力学数据进一步训练了精确的深度势能模型，实现了能量均方根误差为0.50 meV/原子，力均方根误差为15.31 meV/Å，密度和粘度的实验和计算结果差异小于5%。根据实验和模拟数据，建立了 NaCl-KCl-CaCl2 热物理性质的相关方程，并从结构变化的角度进一步解释了热性能随温度的变化。随着温度的升高，所有离子对都向低配位数转移并分散成更小的离子团，从而导致密度、热导率和粘度下降，熔盐的稳定性也随着离子对能量障碍的降低而逐渐降低。

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引用次数: 0

Comparative investigation on dynamic hot corrosion behavior of 347H in quaternary molten salt and its nanofluids 347H 在季熔盐及其纳米流体中的动态热腐蚀行为对比研究

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113263

Ruotong Xu , Cancan Zhang , Lina Ma , Guoqiang Wang , Yuting Wu , Yuanwei Lu

Molten salt corrosion behavior plays an important role in the safe operation of molten salt thermal energy storage system. In this work, the dynamic corrosion behavior of 347H stainless steel are investigated in quaternary nitrate-nitrite molten salt (QNN-MS) and its nanofluids. The results show that obvious scouring gullies were observed on the surface of the 347H coupons in dynamic QNN-MS compared with the static condition. The mass loss (m_mass) of 347H after 1000h in QNN-MS with flow rates of 2 m/s, 1.3 m/s, and 0.6 m/s were 2.54 mg/cm², 2.32 mg/cm², and 2.07 mg/cm², respectively, which were about 88.15 %, 71.51 % and 53.33 % higher than that under static condition. After adding SiO₂ nanoparticles, the corrosiveness of QNN-MS to 347H metal was reduced. At flow rates of 2 m/s and 0 m/s, the m_mass of 347H after 1000 h of corrosion in QNN-MS based nanofluids decreased by 0.70 mg/cm² and 1.36 mg/cm² compared to that in QNN-MS, respectively. Meanwhile, the dynamic corrosion mechanism is comparatively discussed by SEM, XRD and EDS method. This work could provide basic corrosion data for the design and optimization of molten salt thermal energy storage system.

熔盐腐蚀行为对熔盐热储能系统的安全运行起着重要作用。本文研究了 347H 不锈钢在季硝酸盐-亚硝酸盐熔盐（QNN-MS）及其纳米流体中的动态腐蚀行为。结果表明，与静态相比，动态 QNN-MS 中 347H 试样表面出现了明显的冲刷沟壑。在流速为 2 m/s、1.3 m/s 和 0.6 m/s 的 QNN-MS 条件下，347H 在 1000 小时后的质量损失（mmass）分别为 2.54 mg/cm2、2.32 mg/cm2 和 2.07 mg/cm2，比静态条件下分别高出约 88.15 %、71.51 % 和 53.33 %。加入 SiO2 纳米粒子后，QNN-MS 对 347H 金属的腐蚀性降低。在流速为 2 m/s 和 0 m/s 时，347H 在 QNN-MS 纳米流体中腐蚀 1000 h 后的质量比在 QNN-MS 中分别减少了 0.70 mg/cm2 和 1.36 mg/cm2。同时，通过 SEM、XRD 和 EDS 方法对动态腐蚀机理进行了比较讨论。这项工作可为熔盐储热系统的设计和优化提供基础腐蚀数据。

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引用次数: 0

Switchable daytime radiative cooling and nighttime radiative warming by VO2 通过 VO2 实现可切换的白天辐射冷却和夜间辐射升温

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113291

Boshi Wang , Lin Li , Haotuo Liu , Tianyi Wang , Kaihua Zhang , Xiaohu Wu , Kun Yu

With the increasing prominence of energy issues, the radiative thermal management techniques hold great potential in sustainable energy research, which attracted much attention. In this study, a temperature-adaptive selective emission structure is proposed to control the phase transition state of doped vanadium dioxide (VO₂) by the difference of daytime and nighttime temperatures to achieve all-day radiative thermal management. During the day, the ambient temperature increases. When the VO₂ temperature exceeds the phase transition temperature, the structure has high reflectivity in the solar spectral band and high emissivity in the atmospheric transparent band (8–14 μm), resulting in radiative cooling. At night, the ambient temperature decreases. When the temperature of VO₂ is lower than the phase transition temperature, the structure has low emissivity in the atmospheric transparent band (8–14 μm) and high absorptivity in the atmospheric radiative bands (5–8 and 14–16 μm), thus realizing the warming effect. Additionally, the impact of variation in material thickness and angle of incidence on the spectral characteristics of the designed structures are also investigated, and the results indicated that the impact on the spectral characteristics of the structures are not significant. This study provides an innovative approach to regulating energy efficiency in buildings, vehicles and utilities, which can help to promote diversity in energy utilization.

随着能源问题的日益突出，辐射热管理技术在可持续能源研究中蕴含着巨大潜力，备受关注。本研究提出了一种温度自适应选择性发射结构，通过昼夜温差来控制掺杂二氧化钒（VO2）的相变状态，从而实现全天候辐射热管理。白天，环境温度升高。当二氧化钒温度超过相变温度时，该结构在太阳光谱波段具有高反射率，在大气透明波段（8-14 μm）具有高发射率，从而产生辐射冷却。夜间，环境温度降低。当 VO2 的温度低于相变温度时，该结构在大气透明波段（8-14 μm）具有低发射率，而在大气辐射波段（5-8 和 14-16 μm）具有高吸收率，从而实现升温效果。此外，还研究了材料厚度和入射角变化对所设计结构光谱特性的影响，结果表明对结构光谱特性的影响不大。这项研究为调节建筑物、车辆和公用设施的能效提供了一种创新方法，有助于促进能源利用的多样性。

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引用次数: 0

Defect detection in III-V multijunction solar cells using reverse-bias stress tests 利用反向偏压测试检测 III-V 多结太阳能电池中的缺陷

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113286

A. Cano , I. Rey-Stolle , P. Martín , V. Braza , D. Fernandez , I. García

Reverse biasing triple-junction GaInP/Ga(In)As/Ge solar cells may affect their performance by the formation of permanent shunts even if the reverse breakdown voltage is not reached. In previous works, it was observed that, amid the three components, GaInP subcells are more prone to degrade when reverse biased suffering permanent damage, although they present an initial good performance. The aim of this work is, firstly, to study the characteristics of the defects that cause the catastrophic failure of the devices. For this, GaInP isotype solar cells were analysed by visual inspection and electroluminescence maps and submitted to reverse bias stress test. We find that specific growth defects (i.e. hillocks), when covered with metal, cause the degradation in the cells. SEM cross-section imaging and EDX compositional analysis of these defects reveal their complex structures, which in essence consist of material abnormally grown on and around particles present on the wafer surface before growth. The reverse bias stress test is proposed as a screening method to spot defects hidden under the metal that may not be detected by conventional screening methods. By applying a quick reverse bias stress test, we can detect those defects that cause the degradation of devices at voltages below the breakdown voltage and that may also affect their long-term reliability.

对三重结 GaInP/Ga(In)As/Ge 太阳能电池进行反向偏压，即使没有达到反向击穿电压，也可能会形成永久分流，从而影响其性能。在以前的研究中，我们发现，在这三种成分中，GaInP 子电池在反向偏压时更容易退化，遭受永久性损坏，尽管它们最初性能良好。这项工作的目的首先是研究导致器件灾难性失效的缺陷特征。为此，我们通过目测和电致发光图分析了 GaInP 异型太阳能电池，并对其进行了反向偏压测试。我们发现，特定的生长缺陷（即山丘）在被金属覆盖后会导致电池降解。对这些缺陷的 SEM 截面成像和 EDX 成分分析揭示了它们的复杂结构，其实质是由异常生长在生长前晶片表面颗粒上和颗粒周围的材料组成。反向偏置应力测试是一种筛选方法，用于发现隐藏在金属下的缺陷，传统筛选方法可能无法检测到这些缺陷。通过快速反向偏压应力测试，我们可以检测出那些在电压低于击穿电压时会导致器件性能下降并可能影响其长期可靠性的缺陷。

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引用次数: 0

High efficiency Sb2(S, Se)3 thin-film solar cells by substrate-temperature-controlled vapor transport deposition method 通过基底温控气相传输沉积法实现高效 Sb2（S，Se）3 薄膜太阳能电池

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-14 DOI: 10.1016/j.solmat.2024.113232

Deyang Qin , Panpan Yang , Yuxin Pan , Youyang Wang , Yanlin Pan , Guoen Weng , Xiaobo Hu , Jiahua Tao , Junhao Chu , Hidefumi Akiyama , Shaoqiang Chen

Antimony chalcogenide (Sb₂(S, Se)₃) semiconductor has recently emerged as a popular photovoltaic material for thin-film solar cells because of its high light absorption coefficient and tunable absorption band gap. The vapour transport deposition (VTD) approach has shown promise in fabricating Sb₂(S, Se)₃ solar cells. However, conventional VTD depends on varying substrate positions for managing the temperature differential between source and substrate. This phenomenon leads to unstable film flaws that trigger a decline in open-circuit voltage (V_OC) and the development of profound-level defects. Therefore, a novel method for fabricating Sb₂(S, Se)₃ solar cells based on a double-temperature evaporation furnace named substrate temperature–controlled vapour transport deposition method (STC-VTD) is presented in this study. The initial application of the modified VTD method yielded a solar cell with a power conversion efficiency (PCE) of 7.56 %, which is the highest PCE obtained through single evaporation VTD. Deep-level transient spectroscopy measurements reveal that the defect levels generated in the solar cells are passivated via the STC-VTD method. This work proposes substrate temperature–independent control for other physical vapour preparation methods, paving a new direction for further applications of vapour transport technology.

砷化锑（Sb2(S, Se)3）半导体因其高光吸收系数和可调的吸收带隙，最近已成为薄膜太阳能电池的一种流行光电材料。气相传输沉积（VTD）方法在制造 Sb2（S，Se）3 太阳能电池方面已显示出良好的前景。然而，传统的 VTD 依赖于不同的基底位置来管理源和基底之间的温差。这种现象会导致不稳定的薄膜缺陷，引发开路电压（VOC）下降和深层次缺陷的产生。因此，本研究提出了一种基于双温蒸发炉的新型 Sb2(S, Se)3 太阳能电池制造方法，并将其命名为 "基底温控汽相传输沉积法（STC-VTD）"。改进型 VTD 方法的初步应用产生了一种功率转换效率 (PCE) 为 7.56 % 的太阳能电池，这是通过单蒸发 VTD 获得的最高 PCE。深层瞬态光谱测量结果表明，通过 STC-VTD 方法，太阳能电池中产生的缺陷层被钝化。这项工作为其他物理蒸气制备方法提出了与衬底温度无关的控制方法，为蒸气传输技术的进一步应用铺平了新的道路。

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引用次数: 0

Microencapsulation approaches for the development of novel thermal energy storage systems and their applications 开发新型热能储存系统及其应用的微胶囊方法

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-12 DOI: 10.1016/j.solmat.2024.113271

Naveen Jose , Menon Rekha Ravindra

Microencapsulated Phase Change Materials (MEPCMs) represent a breakthrough in the realm of thermal energy storage (TES), providing enhanced stability and expanding the scope of applications across diverse industries. Encapsulating phase change materials within microcapsules, significantly improved the thermal, chemical, and physical properties, thereby increasing the efficiency and reliability of TES systems. Integrating these microencapsulated PCMs into systems from domestic heating and cooling to industrial waste heat recovery can significantly curtail energy usage and improve thermal management. This review delves into the classification of PCMs, including inorganic, organic, and eutectic varieties, and examines the critical requirements for shell materials used in microencapsulation. Various encapsulation techniques, including chemical, physicochemical, and physico-mechanical methods, and characterization techniques for performance evaluation are discussed. The economic aspects of MEPCM-based TES systems are also considered, along with recent advances in microencapsulation techniques, highlighting the wide-ranging applications of MEPCMs in sectors such as solar energy storage, packaging, textiles, electronics, and building, underscoring their role in advancing sustainable energy solutions. This review will serve as a comprehensive resource for researchers and industry professionals, offering valuable insights into the development, characterization, and application of MEPCMs, and guiding future innovations in thermal energy storage technologies.

微胶囊相变材料（MEPCMs）是热能储存（TES）领域的一项突破，它提高了稳定性，扩大了在各行各业的应用范围。将相变材料封装在微胶囊中，可显著改善热、化学和物理特性，从而提高 TES 系统的效率和可靠性。将这些微胶囊相变材料集成到从家用供暖和制冷到工业废热回收的系统中，可以大大减少能源消耗并改善热管理。本综述深入探讨了 PCM 的分类，包括无机、有机和共晶种类，并研究了微胶囊封装对外壳材料的关键要求。还讨论了各种封装技术，包括化学、物理化学和物理机械方法，以及用于性能评估的表征技术。此外，还考虑了基于 MEPCM 的 TES 系统的经济方面，以及微胶囊技术的最新进展，强调了 MEPCM 在太阳能存储、包装、纺织品、电子和建筑等领域的广泛应用，突出了其在推进可持续能源解决方案方面的作用。这本综述将成为研究人员和行业专业人士的综合资源，为 MEPCMs 的开发、表征和应用提供有价值的见解，并为热能存储技术的未来创新提供指导。

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引用次数: 0

Effect of ambient conditions on the performance of solar-powered atmospheric water harvesting system based on desiccant wheel: An experimental investigation 环境条件对基于干燥剂轮的太阳能大气集水系统性能的影响：实验研究

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-12 DOI: 10.1016/j.solmat.2024.113288

Pravesh Kumar Kushwaha, Amit Kumar

The whole world is facing a serious freshwater crisis as the existing sources are rapidly depleting. There is an urgent need to explore a new and sustainable source of potable water to meet the current demand. Solar-powered atmospheric water harvesting (SP-AWH) is an innovative approach to extract water vapor from ambient air as drinking water. Most of the SP-AWH system available in the literature are based on desiccant bed & flat plate collector. These systems are facing limited adsorption capacity of desiccant bed and lower efficiency of flat plate collectors. The present system uses a desiccant wheel for adsorption, an evacuated tube solar air heater for the regeneration of desiccant wheel, and an air-to-air heat exchanger for the condensation of water vapor. The system is operated daily for seven consecutive days under various ambient and operating conditions. The investigation shows that the increase in DBT of ambient air and decrease in humidity ratio severely affected the performance of the SP-AWH system. Under the ambient conditions (i.e. 36 °C DBT and 20 g/kg_da humidity ratio) and operating condition (i.e.113 °C regeneration temperature and 144 kg/h air flow rate) this system achieved a water productivity of 8.6 L in a day. Further, by increasing the regeneration air temperature by 10 % the system's daily yield reaches 9.55 L in a day. Increasing the process air flow rate from 144 kg/h to 180 kg/h improved the water productivity to 10.34 L in a day with an energy efficiency of 10.2 %.

由于现有的淡水资源正在迅速枯竭，全世界都面临着严重的淡水危机。迫切需要探索一种新的、可持续的饮用水源，以满足当前的需求。太阳能大气集水（SP-AWH）是一种从环境空气中提取水蒸气作为饮用水的创新方法。现有文献中的 SP-AWH 系统大多基于干燥剂床& 和平板集热器。这些系统面临着干燥剂床吸附能力有限和平板集热器效率较低的问题。本系统使用干燥剂轮进行吸附，使用真空管太阳能空气加热器对干燥剂轮进行再生，使用空气-空气热交换器对水蒸气进行冷凝。在不同的环境和运行条件下，该系统每天连续运行七天。调查显示，环境空气中 DBT 的增加和湿度比的降低严重影响了 SP-AWH 系统的性能。在环境条件（即 36 °C 的 DBT 和 20 g/kgda 的湿度比）和运行条件（即 113 °C 的再生温度和 144 kg/h 的空气流速）下，该系统一天的产水量为 8.6 L。此外，将再生空气温度提高 10%，系统的日产水量达到 9.55 升。将工艺空气流量从 144 kg/h 提高到 180 kg/h，日产水量提高到 10.34 升，能效为 10.2%。

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引用次数: 0

Recover value materials from waste photovoltaic modules as secondary resource: Layer separation by eco-friendly reagent DMC combined pyrolysis 从废旧光伏组件中回收有价值的材料作为二次资源：利用环保试剂 DMC 联合热解进行层分离

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells

Pub Date : 2024-11-10 DOI: 10.1016/j.solmat.2024.113282

Guijun Xu , Shuai Lv , Le Wang , Xiaofan Zheng , Yue Geng , Kai Yan , Yu Sun , Anyong Qing

Recovery of value materials from waste photovoltaic (PV) modules is conducive to resource recycling and environmental protection. Recycling waste PV modules is the reverse process of manufacturing, and the key is to separate different layers. Herein, an eco-friendly reagent, DMC (dimethyl carbonate, C₃H₆O₃), was firstly utilized to separation different layers of waste PV modules, achieving clean glass and back sheet in which the solid-to-liquid ratio was 1:6 g/mL, reaction temperature was 80 °C, and the size of sample was 2 × 2 cm. The mechanism reflected that DMC mainly reacted with the vinyl acetate portion to decompose EVA into ethylene-vinyl alcohol copolymer and destroyed the tight cross-linking structure. DMC retained its original properties and was cycled for several times. Pure solar cells and connecting strips were obtained by pyrolysis without fluorinated gas after layer separation. The chains of EVA broke and was decomposed by oxidation in the air atmosphere. The whole process did not produce hazardous substances and provided a referable route for the recovery of waste PV modules.

从废弃光伏组件中回收有价值的材料有利于资源循环利用和环境保护。废弃光伏组件的回收利用是制造过程的逆过程，关键在于分离不同的层。本文首先利用环保试剂 DMC（碳酸二甲酯，C3H6O3）分离废光伏组件的不同层，在固液比为 1:6 g/mL、反应温度为 80 ℃、样品尺寸为 2 × 2 cm 的条件下，获得了清洁的玻璃和背板。机理表明，DMC 主要与醋酸乙烯部分发生反应，将 EVA 分解为乙烯-乙烯醇共聚物，破坏了紧密的交联结构。DMC 保持了原有特性，并经过多次循环。层分离后，在不含氟气体的情况下进行热解，得到了纯太阳能电池和连接带。EVA 链断裂，在空气中氧化分解。整个过程不产生有害物质，为废光伏组件的回收提供了一条可参考的途径。

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引用次数: 0