Carbon Energy
·
2022
·Vol. 4
·期 6
·1214-1227
·
IF 21.556
Zhicong Hu,Yongjin Zou,Cuili Xiang,Lixian Sun,Fen Xu,Menghe Jiang,Sensen Yu
The leakage of organic phase change materials (OPCMs) at temperatures above their melting point severely limits their large-scale application. The introduction of porous supports has been identified as an efficient leakage-proofing method. In this study, a novel carbonized Cu-coated melamine foam (MF)/reduced graphene oxide (rGO) framework (MF/rGO/Cu-C) is constructed as a support for fabricating stabilized multifunctional OPCMs. MF serves as the supporting material, while rGO and Cu act as functional reinforcements. As a thermal energy storage material, polyethylene glycol (PEG) is encapsulated into MF/rGO/Cu-C through a vacuum-assisted impregnation method to obtain PEG@MF/rGO/Cu-C composite with excellent comprehensive performance. PEG@MF/rGO/Cu-C exhibits high phase change enthalpies of 148.3 J g −1 (melting) and 143.9 J g −1 (crystallization), corresponding to a high energy storage capability of 92.7%. Simultaneously, MF/rGO/Cu-C endues the composite with an enhanced thermal conductivity of 0.4621 W m −1 K −1 , which increases by 463% compared to that of PEG@MF. Furthermore, PEG@MF/rGO/Cu-C displays great light-to-thermal and electric-to-thermal conversion capabilities, thermal cycle stability, light-to-thermal cycle stability, and shape stability, showing promising application prospects in different aspects.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2014
·
IF 3.96
Yuanna Sun,Lixin Xue,Yaojian Zhang,Xiulan Zhao,Yan Huang,Xudong Du
High water flux polyamide thin film composite (TFC) forward osmosis (FO) membranes with porous supporting substrate layers made from polysulfone (PSf) and polyethersulfone (PES) blends of varied PSf/PES ratio were prepared. The impact of PSf/PES ratio on the porous structure of the supporting substrates and resulting properties of TFC-FO membranes formed were investigated. There were three distinguished sections observed in the cross-sections of the substrates, a top dense skin section, a central porous section, and a bottom open section according to SEM images. With the joint favoring effects from maximum open bottom section percentage in the cross-section and maximum surface roughness , membrane samples made from substrates with a PSf/PES ratio of 2/3 exhibit a highest water flux of 27.6 L/m 2 h for 2 M NaCl draw solution from a de-ionized water feed solution. And their water flux reached 12.7 L/m 2 h under PRO mode and 10.6 L/m 2 h under FO mode from an ocean seawater feed solution containing 3.5 wt.% of NaCl. This high flux is related to the existence of heavily populated cone shaped protrusions observed on the surfaces of formed TFC-FO membranes, resulting from amplification in initial surface roughness of the porous substrate during the active layer forming interfacial co-polymerization process.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Tianxiang Chen,Peirong Zou,Huasheng Xiao,Xinzhi Chen
The quest for carbon neutrality has intensified the search for sustainable energy technologies, with a focus on Mixed Ionic and Electronic Conducting (MIEC) oxygen transport membranes (OTMs) for their potential in pure oxygen separation, catalytic membrane reactors, and solid oxide fuel cells (SOFCs). This study presents a novel Graded Porous Supported Symmetric (GPSS) structure for K 2 NiF 4 -type Pr 2 Ni 0.95 Mo 0.05 O 4+δ (PNM05) membranes, addressing the challenge of balancing high oxygen permeability with long-term stability. The GPSS design, featuring a thin dense layer and porous support layers, enhances gas permeability and structural integrity. The introduction of Cu 2 O as a sintering aid in the dense layer improves membrane densification and electronic conductivity, resulting in an oxygen permeation flux of 4.31 mL min −1 cm −2 , superior to that of traditional hollow fiber membranes. This research provides a promising strategy for developing MIEC OTMs with high permeability and durability, aligning with the goals of carbon neutrality and sustainable energy production. The GPSS design offers a practical solution for advancing oxygen separation technologies in various industrial applications.
研究领域:
材料科学
·
能源技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Ting Chen,Peng Xu,Xianfu Chen,Tao Wang,Kaiyun Fu,Minghui Qiu,Yiqun Fan
Ceramic membranes with high performance have been increasingly applied in the process industry. In this study, a rapid construction process was proposed for preparing high-flux ceramic membranes by UV-curable slurry. Two different alumina powders were well dispersed to enable the dip-coating of interlayer and top layer, respectively, on a 3D printed microporous support. After the coating of interlayer and top layer, a rapid UV curing process was applied, which was completed within 30 s, as opposed to the traditional drying process of more than 10 h for each layer. Additionally, the dual-layer was formed by a one-step co-sintering instead of conventional separate sintering. The effects of coating time on the thickness of interlayer and top layer, as well as the performance of ceramic membranes, were systematically studied. The optimized dual-layer ceramic membrane exhibited a uniform pore size distribution with an average pore size of about 108 nm, and high pure water permeance of 1220 L·m −2 ·h −1 ·bar −1 . The high-flux ceramic membranes exhibited a good performance in the separation of nanoparticles from water suspensions. In the filtration of CeO 2 suspension, the permeance was as high as 850 L·m −2 ·h −1 ·bar −1 , and the dispersed nanoparticles were almost completely removed.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Energy Research
·
2023
·
IF 3.4
Fu Shengjie,Zhang Jinqiu,Xu Kai,Yang Jun,Zhu Liangzhu
Metal-supported solid oxide fuel cells (MS-SOFCs) have attracted increasing attention due to their superior mechanical strength, relatively low material cost, and capability of fast thermal cycling, as compared to the conventional all-ceramic solid oxide fuel cell. However, fabrication of MS-SOFCs still remains challenging. This study reports a cost-effective powder metallurgical manufacturing route for producing MS-SOFCs. Stainless steel 430L (SS430L) powder is selected for producing the metal support due to its relatively low cost and good thermal expansion compatibility. MS-SOFC button cells with the SS430L/YSZ|Ni/YSZ|YSZ|LSCF structure were successfully prepared by co-sintering and ultrasonic pyrolytic spraying. We found that the trace oxygen level in the dilute H2/Ar gas mixture could play a drastic role in laboratory sintering of the SS430L support; local oxygen control is essential, particularly to avoid Cr oxidation. The addition of no more than 10% YSZ as a second phase to SS430L substantially minimized over-sintering of the SS430L support, leading to a more porous metallic-type substrate, while the electrical conductivity and thermal expansion were not much affected. The fabricated MS-SOFC button cells with the SS430L/YSZ|Ni/YSZ|YSZ|LSCF structure delivered a maximum power density of 180 mW cm-2 at 800°C with an open-circuit voltage of 1.13 V, using dry hydrogen as the fuel and ambient air as an oxidant. A cell tested at 750°C showed relatively good stability for a period of 140 h. While the performance still needs further optimization, the high OCV and good stability indicated that the reported powder metallurgy route is a promising method, and the relevant experimental details, particularly on producing metallic and oxidation-free porous supports, are critical for the preparation of MS-SOFCs.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2023
·Vol. 69
·期 11
·e18199
·
IF 3.7
Jiaming Luo,Zishuo Wang,Yong Li,Jing Gao,Huimin Li,Truls Norby,Xiaoke Ku,Xinzhi Chen
Hydrogen separation and purification are key to widespread application of hydrogen energy. Hydrogen permeable membranes based on lanthanum tungstate (LWO) attract attention due to favorable mechanical strength and chemical stability. However, industrial application of LWO-based membranes has remained challenging because of modest hydrogen permeances. Here we report a novel graded porous supported symmetric (GPSS) LWO-based membrane with improved transport properties, gas exchange dynamics, and operational stability, boosting stable hydrogen flux by several times over previously reported state-of-the-art membranes.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jing Gao,Yong Li,Huimin Li,Tianxiang Chen,Huasheng Xiao,Xinzhi Chen
An effective symmetric structured dual phase mixed conducting oxygen separation membrane made of 60 wt% Ce 0.9 Gd 0.1 O 2-δ − 40 wt% Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (60CGO-40BSCF) were prepared by the aqueous tape casting. The symmetric ceramic membranes consisted of a dense thin layer with a thickness of around 50 µm in the middle, and two porous substrates (around 290 µm thick) located on the two sides of the middle thin dense layer. In this case, both the bulk diffusion of oxygen ion and surface gas exchange are simultaneously optimized to enlarge the oxygen permeation flux. In addition, a symmetric structure favors to stabilize the ceramic membrane. Compared with monotonous dense membrane, the porous supported symmetric membrane delivered higher permeation fluxes, e.g., 3.78 ml cm −2 min −1 at 975 °C under an air/He gradient, while an oxygen permeation flux of 1.42 ml cm −2 min −1 was obtained for the monotonous dense membrane. As increasing the O 2 partial pressure in the feed side to 0.8 atm, an oxygen permeation flux of 8.67 ml cm −2 min −1 was obtained. The current study implies that the porous supported symmetric membrane structure is an efficient strategy to enhance the oxygen permeation flux.
研究领域:
材料科学
·
陶瓷工程
·
化学工程
·
膜技术
✓ 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）