Materials Today Sustainability最新文献_第7页

First-principles study of GeC/Ga2SO heterostructure as a potential direct Z-scheme photocatalyst for water splitting 将 GeC/Ga2SO 异质结构作为潜在的直接 Z 型光催化剂用于水分离的第一性原理研究

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-24 DOI: 10.1016/j.mtsust.2024.100989

Xin Huang , Kang Xu , Jiahao Li , Wei Chen , Zhenxing Yang , Kebin Ding , Yujie Leng , Yakui Weng , Shuai Dong , Yunhui Wang , Zhihong Yang

The rational design of van der Waals heterostructure offers an effective avenue for improving the photocatalytic efficiency of individual two-dimensional materials, garnering extensive interest in recent years. Herein, the feasibility of GeC/Ga₂SO heterostructure as a photocatalyst for overall water splitting has been explored based on the first-principles calculations. Our findings reveal that the electronic bandstructure of GeC/Ga₂SO heterostructure can be engineered in staggered or straddling band alignment depending on stacking patterns. Particularly, in the GeC/Ga₂SO heterostructure with staggered band alignment, an intrinsic built-in electric field is established at the interface with the direction from GeC to Ga₂SO, facilitating the formation of a direct Z-scheme heterostructure. Also importantly, the band-edge positions of Z-scheme GeC/Ga₂SO heterostructure cross the water redox potentials, providing adequate driving force for both the reduction and oxidation reactions of water. Gibbs free energy calculations demonstrated that the photocatalytic overall water splitting can proceed spontaneously in the neutral environment (pH = 7) under light irradiation. Moreover, GeC/Ga₂SO heterostructure exhibits good thermal stability and a strong (magnitude in 10⁵ cm⁻¹) and broad (from visible to ultraviolet light) optical absorption. Finally, through applying the tensile strain, further enhancements in the optical absorption and carrier redox ability are achieved due to the favorable modulation in the bandgap. Therefore, all these features make GeC/Ga₂SO heterostructure show great potential in the application of photocatalytic water splitting.

范德华异质结构的合理设计为提高单个二维材料的光催化效率提供了有效途径，近年来引起了广泛关注。本文基于第一性原理计算，探讨了 GeC/Ga2SO 异质结构作为整体水分离光催化剂的可行性。我们的研究结果表明，GeC/Ga2SO 异质结构的电子能带结构可根据堆叠模式设计成交错或跨带排列。特别是在带排列交错的 GeC/Ga2SO 异质结构中，界面上建立了从 GeC 到 Ga2SO 方向的内在电场，从而促进了直接 Z 型异质结构的形成。同样重要的是，Z 型 GeC/Ga2SO 异质结构的带边位置跨越了水的氧化还原电位，为水的还原和氧化反应提供了足够的驱动力。吉布斯自由能计算表明，在中性环境（pH = 7）中，光照照射下的光催化整体水分离可以自发进行。此外，GeC/Ga2SO 异质结构还具有良好的热稳定性和较强的（量级在 105 cm-1 内）、较宽的（从可见光到紫外光）光吸收。最后，通过施加拉伸应变，由于带隙的有利调制，光吸收和载流子氧化还原能力得到了进一步增强。因此，所有这些特点使得 GeC/Ga2SO 异质结构在光催化水分离应用中展现出巨大的潜力。

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引用次数: 0

Unlocking the potential of mixed-valence silver oxide for electrochemical valorization of 5-hydroxymethylfurfural into valuable products 释放混合电价氧化银的潜力，通过电化学方法将 5-羟甲基糠醛转化为有价值的产品

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-24 DOI: 10.1016/j.mtsust.2024.100992

Minh-Trang Huynh Pham , Art Wei Yao Ang , Truong-Giang Vo , Tomohiro Hayashi , Chia-Ying Chiang

The burgeoning interest in the electrocatalytic conversion of biomass-derived compounds, exemplified by 5-hydroxymethylfurfural (HMF), into economically valuable products underscores the significance of such studies. Within this context, the electrocatalytic oxidation of HMF into 2,5-diformylfuran (DFF) using the mixed-valence silver (I, III) oxide (AgO) as the catalyst is presented for the first time. A thorough investigation has been carried out to explore the complex factors influencing the electrochemical transformation of the HMF to DFF, involving applied potentials, reactant concentrations, and the significant implications of mass transfer phenomena. Under optimized conditions, DFF, one of the highest value-added intermediates, can be produced with selectivity as high as 54%. Additionally, a yield of 10.8 μmol cm⁻² h⁻¹ was obtained under mild basic condition. Another pivotal aspect of this work involves meticulously examining the reaction process, bolstered by a comprehensive analytical approach that integrates high-performance liquid chromatography (HPLC), and operando Raman spectroscopy. The amalgamation of operando Raman spectroscopy with advanced simulation techniques represents a novel endeavor, offering a groundbreaking pathway to unravel the complexities inherent in these compounds and contribute substantially to the understanding of HMF oxidation and its intermediates. By looking closely at the catalyst surface during the reaction, a valuable insight into the steps involved was developed, helping in proposing an in-depth reaction pathway.

以 5-hydroxymethylfurfural (HMF) 为例，人们对生物质衍生化合物电催化转化为具有经济价值的产品的兴趣日益浓厚，这凸显了此类研究的重要意义。在此背景下，我们首次介绍了以混合价氧化银（I、III）（AgO）为催化剂，电催化将 HMF 氧化成 2,5-二甲酰呋喃（DFF）的研究。研究人员对影响 HMF 向 DFF 电化学转化的复杂因素进行了深入研究，这些因素涉及应用电势、反应物浓度以及传质现象的重要影响。在优化条件下，可生产出高附加值中间体之一的 DFF，其选择性高达 54%。此外，在温和的碱性条件下，产量为 10.8 μmol cm-2 h-1。这项工作的另一个关键方面是对反应过程进行了细致的研究，并采用了一种综合分析方法，将高效液相色谱法（HPLC）和操作拉曼光谱法结合在一起。将操作拉曼光谱与先进的模拟技术相结合是一种新颖的尝试，为揭示这些化合物固有的复杂性提供了一条开创性的途径，并为了解 HMF 氧化及其中间产物做出了重大贡献。通过仔细观察反应过程中的催化剂表面，我们对所涉及的步骤有了宝贵的见解，有助于提出深入的反应途径。

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引用次数: 0

Thermoelectric devices with polymer/zeolite hybrid composite films for conversion of heat to electricity 利用聚合物/沸石混合复合薄膜将热能转化为电能的热电设备

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-24 DOI: 10.1016/j.mtsust.2024.100993

Deepu Murukadas , Woongki Lee , Chanbin Park , Hwajeong Kim , Youngkyoo Kim

Here we report that organic/inorganic hybrid composite films, consisting of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and zeolite Y (Zy), can efficiently convert heat to electricity in the horizontal device geometry. The PEDOT:PSS/Zy (PPZy) hybrid composite films were prepared from corresponding aqueous solutions at various Zy contents (up to 50 wt%). The PPZy solutions exhibited an increased viscous state with a maximum at Zy = 30 wt%, indicating strong interactions between PEDOT:PSS and Zy components. All devices with the PPZy composite films could convert heat to electricity and showed higher thermoelectric (TE) performances than those with the pristine PEDOT:PSS films. The TE devices with the PPZy films (Zy = 30 wt%) delivered an output power of 8.8 pW with a power factor of 0.76 μW/mK², which is ca. 20 times higher than those with the pristine PEDOT:PSS films. The flexible TE devices, which were fabricated on poly(ethylene naphthalate) (PEN) film substrates, exhibited robust TE performances even after 5000 bending cycles. The present approach of hybrid composite films based on zeolite particles may contribute to further TE performance improvement for flexible and wearable TE devices.

在此，我们报告了由聚（3,4-亚乙二氧基噻吩）:聚（苯乙烯磺酸）（PEDOT:PSS）和沸石 Y（Zy）组成的有机/无机混合复合薄膜可以在水平器件几何形状中有效地将热能转化为电能。PEDOT:PSS/Zy (PPZy) 混合复合薄膜是用不同 Zy 含量（最高达 50 wt%）的相应水溶液制备的。PPZy 溶液的粘度在 Zy = 30 wt% 时达到最大值，表明 PEDOT:PSS 和 Zy 成分之间存在很强的相互作用。与使用原始 PEDOT:PSS 薄膜的器件相比，使用 PPZy 复合薄膜的所有器件都能将热量转化为电能，并显示出更高的热电（TE）性能。使用 PPZy 薄膜（Zy = 30 wt%）的 TE 器件输出功率为 8.8 pW，功率因数为 0.76 μW/mK2，比使用原始 PEDOT:PSS 薄膜的器件高出约 20 倍。在聚（萘乙酸乙二醇酯）（PEN）薄膜基底上制作的柔性 TE 器件即使在经过 5000 次弯曲循环后仍能表现出稳定的 TE 性能。目前基于沸石颗粒的混合复合薄膜方法可能有助于进一步提高柔性和可穿戴 TE 器件的 TE 性能。

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引用次数: 0

Experimental study on constitutive relation of coal gangue coarse aggregate concrete under uniaxial compression 单轴压缩条件下煤矸石粗骨料混凝土构成关系的试验研究

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-23 DOI: 10.1016/j.mtsust.2024.100987

Wei Dong , Zhiqiang Ren , Xin Liu

As an efficient method for utilizing coal gangue (CG), concrete incorporating coal gangue as coarse aggregate has significantly reduced the reliance on natural aggregates, offering substantial environmental and economic benefits. In this study, coal gangue concrete was prepared with coal gangue replacement rates of 0, 20, 40, 60, 80, and 100%, and mechanical tests under unconfined compression were conducted to evaluate the stress-strain behavior and failure mechanism of coal gangue coarse aggregate concrete (CGC). Utilizing scanning electron microscope (SEM) microscopic characterization, the microscopic failure mechanism of CGC was further elucidated. With increased coal gangue replacement, the CGC's uniaxial compression failure mode shifts from shear to longitudinal splitting failure. The slope, peak stress and elastic modulus of the stress–strain curve's rising section are negatively correlated with the coal gangue content, while the falling section's slope, peak strain and ultimate strain are positively correlated. Next, building upon the classical constitutive model, we adjust the constitutive parameters utilizing the uniaxial compressive strength and coal gangue content. Finally, we introduce a predictive model for the CGC's constitutive compressive behavior across various content levels. There is a notably high agreement between the model and experimental data.

作为一种有效利用煤矸石（CG）的方法，以煤矸石为粗骨料的混凝土大大减少了对天然骨料的依赖，带来了巨大的环境和经济效益。本研究制备了煤矸石替代率分别为 0、20、40、60、80 和 100%的煤矸石混凝土，并进行了无侧限压缩力学试验，以评估煤矸石粗骨料混凝土（CGC）的应力应变行为和破坏机理。通过扫描电子显微镜（SEM）的微观表征，进一步阐明了煤矸石粗骨料混凝土的微观破坏机理。随着煤矸石掺量的增加，CGC 的单轴压缩破坏模式从剪切破坏转变为纵向劈裂破坏。应力-应变曲线上升段的斜率、峰值应力和弹性模量与煤矸石含量呈负相关，而下降段的斜率、峰值应变和极限应变呈正相关。接下来，在经典构成模型的基础上，我们利用单轴抗压强度和煤矸石含量调整了构成参数。最后，我们引入了一个预测模型，用于预测 CGC 在不同含量水平下的构成抗压行为。该模型与实验数据的一致性非常高。

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引用次数: 0

Carbon nanotube/carbon foam thermal-bridge enhancing solar energy conversion and storage of phase change materials 碳纳米管/碳泡沫热桥增强相变材料的太阳能转换和储存功能

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-23 DOI: 10.1016/j.mtsust.2024.100986

Shu-Yao Li , Ting Yan , Ying-Jie Huo , Wei-Guo Pan

Combining solar energy conversion with latent heat storage based on phase change materials (PCMs) has offered a promising way for expanding solar energy utilization. However, the application of PCMs for solar heat utilization is greatly limited by low thermal conductivity and poor sunlight absorption capacity. Carbon foam (CF) has excellent sunlight absorption properties, and carbon nanotube (CNT) have good thermal conductivity. In this study, CF/CNT porous material was prepared by self-assembly thermal-bridge between CF and CNT. CF/CNT was employed to a porous matrix for the encapsulation of octadecanol (OC), and then a composite photothermal PCM (CF/CNT/OC) was successfully fabricated. Compared with pure OC, the CF/CNT/OC has superior thermal conductivity capacity and excellent photothermal conversion performance. The thermal conductivity of CF/CNT/OC89 reached 1.31 W m⁻¹ K⁻¹, and the photothermal conversion efficiency was 82.6 %. Meanwhile, the melting enthalpy of CF/CNT/OC98 reached up to 275.8 kJ∙kg⁻¹, exhibiting the excellent thermal storage properties. This functional composite PCM has broad application prospects in solar energy capture and storage, building energy saving and so on.

将太阳能转换与基于相变材料（PCMs）的潜热存储相结合，为扩大太阳能利用提供了一条前景广阔的途径。然而，由于热传导率低、阳光吸收能力差，PCMs 在太阳能热利用方面的应用受到很大限制。泡沫碳（CF）具有优异的阳光吸收性能，而碳纳米管（CNT）具有良好的导热性。本研究通过碳泡沫和碳纳米管之间的自组装热桥制备了碳泡沫/碳纳米管多孔材料。将 CF/CNT 用作封装十八醇（OC）的多孔基质，然后成功制备了一种复合光热 PCM（CF/CNT/OC）。与纯 OC 相比，CF/CNT/OC 具有更高的导热能力和优异的光热转换性能。CF/CNT/OC89 的热导率达到 1.31 W m-1 K-1，光热转换效率为 82.6%。同时，CF/CNT/OC98 的熔焓高达 275.8 kJ∙kg-1，表现出优异的蓄热性能。这种功能复合 PCM 在太阳能捕获与储存、建筑节能等方面具有广阔的应用前景。

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引用次数: 0

MOF-derived magnetic nanocomposites as potential formulations for the efficient removal of organic pollutants from water via adsorption and advanced oxidation processes: A review MOF 衍生的磁性纳米复合材料是通过吸附和高级氧化过程高效去除水中有机污染物的潜在配方：综述

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-23 DOI: 10.1016/j.mtsust.2024.100985

Youssef Miyah , Noureddine El Messaoudi , Mohammed Benjelloun , Jordana Georgin , Dison Stracke Pfingsten Franco , Yaser Acikbas , Heri Septya Kusuma , Mika Sillanpää

This review article summarizes current developments in the design and application of metal-organic framework (MOF)-derived magnetic nanocomposites (MNCs) to remove organic pollutants (OPs) in water efficiently. In the review, various methods for synthesis, like in-situ encapsulation and post-synthetic modification, have been discussed, showing how magnetic nanoparticles incorporated into MOFs resulted in materials that had improved adsorption and advanced oxidation processes. These NCs showed unique structural characteristics and functional advantages given their large surface area, tunable pore sizes, and magnetic separability. This work has emphasized dual functionality concerning adsorption and photocatalytic degradation. More importantly, these processes synergistically cooperate to realize considerably high removal efficiencies for a wide range of OPs. It also addresses current challenges on stability and scalability issues and proposes possible ways of improving MOF-MNCs' performance. This is followed by future research directions on the betterment of the practical application of MOF-MNCs in controlling water pollution, highlighting their potential as a feasible and effective solution for mitigating water contamination. Lastly, it is proposed in this synthesis that Ishikawa 5Ms should be considered when developing low-cost MOF-MNCs and industrializing their application for water depollution.

这篇综述文章总结了设计和应用金属有机框架（MOF）衍生的磁性纳米复合材料（MNCs）高效去除水中有机污染物（OPs）的最新进展。综述中讨论了各种合成方法，如原位封装和合成后改性，展示了将磁性纳米粒子融入 MOF 中如何产生具有更好吸附性和更高级氧化过程的材料。这些 NC 具有独特的结构特征和功能优势，因为它们具有大表面积、可调孔径和磁性可分离性。这项工作强调了吸附和光催化降解的双重功能。更重要的是，这些过程协同合作，实现了对各种 OPs 的相当高的去除率。研究还探讨了目前在稳定性和可扩展性方面面临的挑战，并提出了提高 MOF-MNC 性能的可行方法。随后介绍了未来的研究方向，即如何更好地将 MOF-MNCs 实际应用于水污染控制，突出其作为可行、有效的水污染缓解方案的潜力。最后，本综述提出，在开发低成本 MOF-MNCs 并将其工业化应用于水污染治理时，应考虑石川 5Ms。

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引用次数: 0

Improving HER activity and stability of Pt nanoparticle on Triazine graphitic nanoplatelets 提高三嗪石墨纳米片上铂纳米粒子的 HER 活性和稳定性

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-21 DOI: 10.1016/j.mtsust.2024.100984

Se Jung Lee , Jong-Beom Baek , In-Yup Jeon

Triazine graphitic nanoplatelets (TGNP) were synthesized as an anchor to improve the activity and stability of Pt nanoparticles for the hydrogen evolution reaction (HER). Pt@TGNP, Pt supported on TGNP, showed high performance (i.e., high activity and stability) for HER under acidic conditions. Although Pt@TGNP contained very low Pt content (8.7 wt%), it exhibited much better activity (overpotential: 32 mV, Tafel slope: 28.4 mV dec⁻¹) and stability (overpotential increase: 1.6 mV) for HER, compared with Pt/C (overpotential: 35 mV, Tafel slope: 29.2 mV dec⁻¹, and overpotential increase: 6.2 mV). The results convincingly demonstrate that the triazine units of TGNP offer active sites that increase catalytic activity, as well as anchoring sites to prevent the aggregation of Pt nanoparticles. Results confirmed that Pt@TGNP with its efficient catalytic activity and stability is a promising alternative to existing Pt-based catalysts, and TGNP with triazine is highly likely to be utilized as a catalyst support in various applications.

合成了三嗪石墨纳米颗粒（TGNP）作为锚，以提高铂纳米颗粒在氢进化反应（HER）中的活性和稳定性。在酸性条件下，Pt@TGNP（铂支撑在 TGNP 上）在氢演化反应中表现出高性能（即高活性和高稳定性）。虽然 Pt@TGNP 的铂含量很低（8.7 wt%），但与 Pt/C（过电位：35 mV，Tafel 斜坡：29.2 mV dec-1，过电位增加：1.6 mV）相比，它在 HER 方面表现出更好的活性（过电位：32 mV，Tafel 斜坡：28.4 mV dec-1）和稳定性（过电位增加：1.6 mV）：6.2 mV）。这些结果令人信服地证明，TGNP 的三嗪单元提供了可提高催化活性的活性位点，以及防止铂纳米粒子聚集的锚定位点。研究结果证实，Pt@TGNP 具有高效的催化活性和稳定性，是现有铂基催化剂的理想替代品。

引用次数: 0

Perovskite photovoltaics with cutting-edge strategies in 2D TMDs-based interfacial layer optimization 利用基于二维 TMD 的界面层优化的前沿战略开发 Perovskite 光伏技术

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-21 DOI: 10.1016/j.mtsust.2024.100982

Sikandar Aftab , Burragoni Sravanthi Goud , Maria Mukhtar , Zeeshan Haider , Fahmid Kabir , Ghazanfar Nazir , Muhammad Jehanzaib Aslam , Muhammad Aslam , H.H. Hegazy , Jae Hong Kim , Altaf Hussain Rajpar

One practical solution for effective solar energy conversion is the use of perovskite photovoltaics (PV). Nevertheless, issues like hysteresis, instability, and short device lifetimes have restricted their practical use. As interfacial layers, two-dimensional transition metal dichalcogenides (TMDs) are quite different from metal oxides and small molecules. Optical and electronic properties can be improved by adjusting layers or applying strain on TMDs, which have a layered structure with direct bandgaps that is atomically thin. High carrier mobilities and distinct van der Waals interactions with neighboring layers are also supported by them. Charge transport capabilities; on the other hand, small molecules are typically processed using solution-based techniques and provide discrete energy levels. Interfacial layers facilitate smooth charge transport, which is advantageous to perovskite absorber layers. Much attention has been paid to the unique properties and compatibility of 2D TMDs with perovskite solar cells. The use of 2D TMDs materials as interfacial layers in perovskite photovoltaics (PVs) is reviewed in this review, with particular attention paid to their roles as electron transport layers (ETLs) and hole transport layers (HTLs). We first describe the main challenges faced by PSCs and how interfacial layers offer workable solutions. We also study the ways in which these layers improve robustness of the device, reduce hysteresis effects, and increase charge extraction efficiency. We consolidate information regarding the potential of two-dimensional (2D) materials to address important concerns concerning PSCs, thereby advancing the development of dependable and effective PVC devices for real-world solar energy harvesting applications. We do this by providing a comprehensive overview of recent research.

有效转换太阳能的一个实用解决方案是使用过氧化物光伏技术（PV）。然而，磁滞、不稳定性和设备寿命短等问题限制了它们的实际应用。作为界面层，二维过渡金属二掺杂物（TMDs）与金属氧化物和小分子有很大不同。TMD 具有原子级薄的直接带隙的层状结构，通过调整层或对其施加应变，可以改善其光学和电子特性。它们还支持高载流子迁移率以及与邻近层之间明显的范德华相互作用。电荷传输能力；另一方面，小分子通常使用基于溶液的技术进行处理，并提供离散能级。界面层可促进电荷顺利传输，这对包晶体吸收层来说非常有利。二维 TMD 的独特性质以及与包晶体太阳能电池的兼容性受到了广泛关注。本综述回顾了二维 TMDs 材料作为界面层在包晶光伏（PV）中的应用，尤其关注它们作为电子传输层（ETL）和空穴传输层（HTL）的作用。我们首先介绍了 PSCs 面临的主要挑战，以及界面层如何提供可行的解决方案。我们还研究了这些层改善器件稳健性、减少滞后效应和提高电荷提取效率的方法。我们整合了有关二维（2D）材料潜力的信息，以解决有关 PSC 的重要问题，从而推动可靠、有效的 PVC 器件的开发，用于现实世界中的太阳能收集应用。为此，我们对最新研究进行了全面综述。

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引用次数: 0

Recent advances in pseudocapacitive electrode materials for high energy density aqueous supercapacitors: Combining transition metal oxides with carbon nanomaterials 用于高能量密度水性超级电容器的伪电容电极材料的最新进展：过渡金属氧化物与碳纳米材料的结合

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-19 DOI: 10.1016/j.mtsust.2024.100981

Chandu V.V.Muralee Gopi , Salem Alzahmi , Mohammad Y. Al-Haik , Yedluri Anil Kumar , Fathalla Hamed , Yousef Haik , Ihab M. Obaidat

The demand for high-power and energy-dense electrochemical energy storage solutions has led to the utilization of pseudocapacitive materials. These materials store charges by undergoing Faradaic reactions at or near the electrode surfaces. They offer higher energy density than electric double-layer capacitors while maintaining the rapid charging/discharging capabilities characteristic of supercapacitors. This review delves into the synergistic relationship between transition metal oxides (TMOs) and carbon-based materials to create advanced supercapacitors. Combining the pseudocapacitive properties of TMOs with the high conductivity and carbon surface area, hybrid composites offer the potential to bridge the gap between energy and power density. The review comprehensively explores a range of TMOs, including ZnO, NiO, CoO, CuO, MnO₂, and RuO₂, and their integration with various carbon architectures. Key synthesis techniques, characterization methods, and electrochemical performance metrics are discussed to comprehensively understand these materials. Moreover, the review highlights recent advancements and identifies critical challenges to guide future research efforts toward developing high-performance and commercially viable supercapacitors based on TMO/carbon composites.

对高功率、高能量电化学储能解决方案的需求促使人们开始使用伪电容材料。这些材料通过在电极表面或其附近发生法拉第反应来存储电荷。与双层电容器相比，它们具有更高的能量密度，同时还能保持超级电容器特有的快速充放电能力。本综述深入探讨了过渡金属氧化物（TMO）与碳基材料之间的协同关系，以创造先进的超级电容器。混合复合材料将过渡金属氧化物的伪电容特性与高导电性和碳表面积相结合，有望缩小能量和功率密度之间的差距。本综述全面探讨了一系列 TMOs，包括氧化锌、氧化镍、氧化钴、氧化铜、二氧化锰和二氧化钌，以及它们与各种碳架构的整合。文章讨论了关键合成技术、表征方法和电化学性能指标，以全面了解这些材料。此外，该综述还重点介绍了最新进展，并指出了关键挑战，以指导未来的研究工作，开发基于 TMO/ 碳复合材料的高性能、商业上可行的超级电容器。

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引用次数: 0

Hygroscopic ionogel for enhanced thermoelectric generation performance 增强热发电性能的吸湿离子凝胶

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-09-16 DOI: 10.1016/j.mtsust.2024.100976

Yixuan Han , Tong Lyu , Yanpeng Wang , Zhiwei Fu , Deliang Li , Ruonan Liu , He Liu , Ziya Gao , Huilin Yuan , Ye Tian

Improving thermoelectric generators (TEGs) performance remains challenging in the context of energy crisis and thermal-pollution. Here, we present a strategy for thermal management and performance enhancement of TEGs by sustainable evaporative cooling utilizing highly hygroscopic and adhesive ionogels (PIGs). Rational swelling and poly-[2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (PDMAPS) chains with group interactions prevent lithium chloride (LiCl) and 1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]) leakage, while carbon nanotubes (CNTs) and MIL-101(Cr) optimize the evaporative cooling of PIGs. PIGs possess high sorption (252.72% at 25 °C, 90% RH for 12 h) and steady sorption-desorption kinetics. Meanwhile, PIGs exhibit high adhesion (130.89 N m⁻¹) on TEGs. The evaporative cooling of PIGs enhances the temperature difference of TEGs. The potential of PIG-TEG is increased by three times at heat source temperatures of 50–80 °C, and the output power density stabilizes at ∼706.25 mW m⁻² after heating at 50 °C for 1 h. Moreover, the PIG-TEG maintains stable output enhancement for prolonged time (over 24 h). Additionally, we integrate PIG-TEGs for the durable power supply of devices and design a movable model car, which utilizes waste heat for self-powering. PIGs realize effective thermoelectric output enhancement of TEGs, and provide ideas in clean energy conversion, wearable devices, and mobile power.

在能源危机和热污染的背景下，提高热电发电机（TEG）的性能仍然是一项挑战。在此，我们提出了一种利用高吸湿性和粘性离子凝胶（PIGs）进行可持续蒸发冷却的热管理和提高 TEG 性能的策略。合理的溶胀和具有基团相互作用的聚-[2-（甲基丙烯酰氧基）乙基]二甲基-（3-磺丙基）氢氧化铵（PDMAPS）链可防止氯化锂（LiCl）和 1-乙基-3-甲基咪唑醋酸盐（[EMIM][Ac]）泄漏，而碳纳米管（CNT）和 MIL-101（Cr）可优化 PIGs 的蒸发冷却。PIGs 具有很高的吸附率（25 °C、90% 相对湿度条件下 12 小时吸附率为 252.72%）和稳定的吸附-解吸动力学。同时，PIG 在 TEG 上表现出很高的附着力（130.89 N m-1）。PIG 的蒸发冷却增强了 TEG 的温差。在 50-80 °C 的热源温度下，PIG-TEG 的电位提高了三倍，在 50 °C 下加热 1 小时后，输出功率密度稳定在 706.25 mW m-2 左右。此外，我们还将 PIG-TEG 集成到设备的持久供电中，并设计了一辆可移动的模型车，利用废热自行供电。PIG 实现了 TEG 的有效热电输出增强，为清洁能源转换、可穿戴设备和移动电源提供了思路。

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引用次数: 0