APPLIED ENERGY
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2022
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IF 11.446
Rui-Long Wang,Ming-Jia Li,Dong Li,Yi-Wen Yang
In this paper, a novel microalgal attached membrane photobioreactor based on the modified polyvinylidene difluoride (PVDF) / polyvinyl pyrrolidone (PVP) composite membrane for microalgae direct air carbon capture is developed and optimized. The Computational Fluid Dynamics (CFD) simulation, molecular dynamic study (MDS) and experimental study are adopted to investigate the synergy between light transmission and fluid flow, CO 2 transmission mechanism inside the membrane and microalgae cells. The modified composite membrane is proposed and processed to improve the carbon sequestration rate of the microalgal attached membrane photobioreactor (AM-PBR). First, the synergy angle between the light transmission direction and fluid flow direction of the flat-plate photobioreactor (FP-PBR) is analyzed. To improve the synergy of light and fluid flow, the AM-PBR is proposed. Secondly, for the MDS part, the models of PVDF membrane and polytetrafluoroethylene (PTFE) membrane are developed. A three-layer simulation model is proposed to reveal the transmission mechanism of CO 2 from the gas-liquid layer to the microalgae cell membrane layer. Several parameters including CO 2 diffusion coefficient, CO 2 concentration profile and velocity profile of CO 2 are analyzed to compare the performance of different membranes and working conditions. Then, for verification of the simulation work, AM-PBR experiments are designed. To further enhance the CO 2 transmission and microalgae attached performance, different PVDF/PVP composite membranes are assessed. The carbon sequestration rate of the modified membrane is improved according to the experiments. Finally, the novel microalgae membrane photobioreactor with the modified PVDF/PVP membrane is developed and the carbon sequestration rate of the PBR system is improved. The results showed that the best ratio for PVDF and PVP is 2:1 with 20 wt% solution, and with this modified membrane the carbon sequestration rate of the PVDF/PVP-based AM-PBR is 18.61% higher than the original PVDF-based AM-PBRs. The proposed novel AM-PBR is especially useful for low-concentration CO 2 direct air carbon capture.
研究领域:
环境科学
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Jianling Guo,Yuan Zhang,Shaoxiong Fu,Shuaipeng Yan,Yaqiang Lang,Li Wang,Guangchuan Liang
The practical application of high-voltage LiNi0.5Mn1.5O4 is heavily restricted by serious capacity degradation, especially at high temperatures. Commercial polyolefin separators have shortcomings of poor electrolyte wettability and severe thermal shrinkage. In addition, polyolefin separators cannot prevent the penetration of lithium dendrites for lithium anodes, resulting in electrochemical performance degradation and potential safety concern for lithium-ion batteries. Herein, a homogeneous suspension containing sepiolite is electrospun onto the surface of a poly(propylene) (PP) substrate to produce a composite separator for high-voltage LiNi0.5Mn1.5O4 batteries. Different from previous research, the PP substrate is modified on single and double sides, respectively. The influence of a single-side coating separator on the cathode and the anode is studied. It is found that the sepiolite electrospinning layer can uniformly distribute the current density and form uniform lithium-ion deposition, which can avoid the growth of lithium dendrites. The different assembly directions of the single-side coating separator show great differences in battery performance. The LiNi0.5Mn1.5O4/Li battery using the single-side coating separator with the sepiolite electrospinning layer facing the Li anode shows better cycling stability (74.4% after 200 cycles at 55 °C), greatly alleviating the capacity fading of LiNi0.5Mn1.5O4 batteries at high temperature. The stable solid electrolyte interphase (SEI) layer on the anode surface plays a predominant role in the cycle life of the battery. The single-side coating separator with the sepiolite electrospinning layer facing the anode is more suitable for high-voltage LiNi0.5Mn1.5O4 batteries.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2017
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IF 2.895
Liang Shen,Yan Wang
Interfacially synthesized polyamide (PA) thin-film composite (TFC) membranes are widely employed in forward osmosis (FO) applications because of the easy fabrication and excellent separation performance. But they generally suffer from the relative low water permeability and high fouling tendency due to the inherent hydrophobic nature of the PA layer. In this study, an efficient surface modification of nascent TFC membranes is performed by grafting a self-catalyzed tripodal amine—tris(2-aminoethyl)amine (TAEA), in order to improve the membrane performance. This tertiary amine plays a dual role of the reactive amine monomer reacting with acyl chloride groups and the catalyst accelerating the amidation reaction between 1,3,5-trimesoyl chloride (TMC) and TAEA, therefore contributing to an efficient grafting effect to the greatest extent. State-of-the-art characterizations are applied to verify the modification mechanism. The effects of the pH and concentration of the TAEA solution on the overall properties of the resultant TFC membranes are systematically investigated, including the surface chemical composition, surface morphology, hydrophilicity, surface charge, separation performance, and fouling resistance. Compared with the control TFC membrane, TAEA-modified TFC membranes exhibit significantly improved water fluxes, higher antifouling propensity, and comparable reverse salt fluxes.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Peilong Zhou,Dongxu Yao,Hanqin Liang,Yongfeng Xia,Yu-Ping Zeng
Lithium–Sulfur battery is deemed as one of the most promising next-generation energy storage systems. Identifying the reduction of soluble lithium polysulfides (LiPSs) is critical for rational material designs for Lithium–Sulfur batteries. In this work, a simple molten-salt method is applied to synthesize titanium nitride/silicon nitride (TiN–Si 3 N 4 ) core-shell nanoparticles to inhibit soluble polysulfides shuttling. This Ti-reacted strategy has outstanding advantages such as facile and recyclable preparation process, tunable TiN morphology, and good polysulfide adsorption. With the modified separator, Li–S cells exhibit an outstanding initial capacity of 1243 mA h g −1 at 0.5C, good rate capacity of 782 mA h g −1 at 2C, and high capacity retention of 49.2% after 500 cycles. This low-cost and eco-friendly Ti-reacted strategy provides a practical route for the actual application of separator modification in the field of lithium-sulfur battery.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Shengheng Nong,Dongyuan Huang,Yaoying Li,Ruoxi Yang,Jiawei Xie,Jia Li,Haifu Huang,Xianqing Liang,Guangxu Li,Zhiqiang Lan,Haizhen Liu,Dan Huang,Shuaikai Xu,Jin Guo,Wenzheng Zhou
Lithium–sulfur batteries have been researched extensively because of their high energy density and low price. However, the poor conductivity of sulfur, the shuttle effect of polysulfide, the slow redox kinetics of sulfur species, and the significant volume expansion and contraction during charging and discharging have hindered the commercial application of lithium–sulfur batteries. In this study, a simple, scalable, and cost-effective strategy was developed to control the balance of the porosity, specific surface area, graphitization , heteroatom co-doping, and polar-polar interactions of a biomass carbon source. With this strategy, multifunctional porous carbon materials with three-dimensional network structures were prepared to serve as sulfur-loading hosts with high specific surface area, strong adsorption activity, and good conductivity. Moreover, the optimal porous carbon material was directly coated on a commercial separator, and the modified separator was found to further improve the electrochemical performance of a lithium–sulfur battery . As a result, for the battery with GPCS-3 as cathode electrode and modified separator as separator, the initial discharge capacity at 1.0C is 926.2 mAh g −1 . After 300 cycles, the discharge capacity is 712.7 mAh g −1 , and the average capacity decay is only 0.077 % per cycle. Since the three-dimensional network structure material exhibits good performance as a sulfur-loading host as well as the ability to effectively modify a separator, this study provides a valuable strategy for the fabrication of high energy density lithium–sulfur batteries.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2018
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IF 6.945
Guoping Chen,Xiong Song,Suqing Wang,Xinzhi Chen,Haihui Wang
Lithium-sulfur (Li S) batteries are attractive candidates for advanced energy storage devices. However, the low utilization of sulfur and the severe “shuttle effect” hinder the commercialization of Li S batteries. Herein, we design an ultra-thin and lightweight two-dimensional (2D) molybdenum nitride nanosheets layer to modify Celgard (denoted as MoN x /Celgard) separator to promote the electrochemical performance of Li S batteries. Benefiting from the 2D polar molybdenum nitride nanosheets, the obtained molybdenum nitride layer can effectively suppress the shuttle effect via the synergistic effect of structural confinement and chemical absorption . Meanwhile, molybdenum nitride nanosheets layer possesses metallic and catalytic characteristics, which are beneficial for high sulfur utilization. Therefore, the Li S batteries using MoN x /Celgard separator with multifunction exhibit high capacity and outstanding cycling performance. It delivers a high discharge capacity of 1298 mA h g −1 at 0.1C and sustain a capacity of 566 mA h g −1 after 500 cycles at 0.5C, corresponding with the capacity fading rate of only 0.063% per cycle.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
·
IF 6.216
Xiong Song,Suqing Wang,Guoping Chen,Tuo Gao,Yue Bao,Liang-Xin Ding,Haihui Wang
A novel lightweight, multi-functional layer comprised of 1D porous Fe-embedded nitrogen-doped carbon nanofibers (Fe-N-C) and 2D graphene sheets is introduced to modify a commercial polypropylene (PP) separator for use in lithium-sulfur batteries. Benefiting from the high electrical conductivity and strong lithium polysulfide (LiPS) chemical adsorption ability of Fe-N-C, the porous intercalation-structured modified layer exhibits excellent ability to suppress LiPS shuttling while maintaining high lithium-ion transport, and the modified layer functions as a highly conductive upper current collector to reutilize active sulfur species. The cell assembled with the modified multifunctional separator shows a high rate capability and excellent cycling stability, exhibiting a capacity of 847.9 mAh g −1 at 2 C and a low degradation rate of 0.053% per cycle over 500 cycles at 0.5 C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zheng Nie,Caihong Liu,Xihui Jiang,Yifan Zhou,Xu Lin,Xiaoqing Zhao,Qiang He,Hongxiang Chai,Xueling Pang,Jun Ma
We report a facile ultrafiltration (UF) membrane modification strategy to impart anti-fouling properties to a polyethersulfone (PES) membrane via a simple codeposition of polydopamine (PDA) and the zwitterionic surfactant, 3-(N, N-Dimethylmyristylammonio) propane sulfonate (SB3-14). The effect of SB3-14 concentration (from 0.5, 1 to 2 mM) was also studied. The proposed modification notably increased membrane anti-fouling property without compromising membrane transport properties. As demonstrated by dynamic fouling experiments using BSA as a model foulant, the modified membranes presented significantly alleviated flux decline and decreased fouling resistance compared to the pristine membrane. Especially, the membrane modified with low SB3-14 concentration (i.e., 0.5 mM) possessed the optimal antifouling performance compared to those modified with higher concentrations, which may be attributed to reduced efficiency in PDA/SB3-14 aggregates functionalization on membrane surface in the presence of excessive zwitterions. Furthermore, the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) results illustrate that Lewis acid-base (AB) played a dominant role during the fouling construction, and the presence of SB3-14 could tremendously decrease AB energy. This codeposition of PDA and non-polymer zwitterionic surfactant could be applied to prepare anti-fouling PES membranes with low reversible and irreversible fouling, which provides a new scope for post modification of UF membranes.
研究领域:
材料科学
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环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
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2022
·
IF 8.907
Baoying Dang,DaYang Gao,Yuhong Luo,Zisheng Zhang,Jingde Li,Feichao Wu
Lithium-sulfur battery is perceived as one promising next generation rechargeable battery system, in view of its high theoretical specific capacity and energy density . However, the “shuttle effect” of polysulfides and the uncontrolled growth of lithium dendrites significantly obstruct its practical application. Herein, a bifunctional separator with double-sided modification is developed to simultaneously resolve these issues, which is constructed by growing continuous cerium-based metal-organic framework-808 (Ce-MOF-808) membranes on both sides of the commercial polypropylene (PP) separator through a simple in-situ growth method. On the cathode side , the Ce-MOF-808 membrane can play multiple roles of adsorption, selective sieving and catalytic conversion towards polysulfides, thereby effectively inhibiting their shuttle effect. On the anode side , the highly uniform pore distribution and polar groups of this MOF membrane ensure the fast and homogenous diffusion of lithium ions , endowing a stable lithium nucleation and growth in the cycles. Consequently, the Ce-MOF-808/PP separator exhibits a high initial specific capacity of 954.7 mAh g −1 under 1 C with a very limited capacity fading of 0.025% in 500 cycles, and an outstanding rate capability. Moreover, the separator also ensures the stable cycling of the battery at raised sulfur loading and lean-electrolyte conditions.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Changqing Miao,Yujia Tong,Fiona Hammond Quarcoo,Xiaohui Ju,Weixing Li
Mussels in nature can adhere to the surface of hydrophobic substances by secreting adhesive substances, which has attracted wide attention by coating method for membrane modification. However, complicated processing procedures remain major problems. Here, we proposed a simple, mild and fast surface coating method. Proanthocyanidins (PC) react with 3-aminopropyl triethoxysilane (KH550) under the accelerated action of the oxidant ammonium persulfate (APS) at room temperature to form a polyphenol network. The hydrophilic network coating was constructed on PVDF membrane by surface co-deposition method for 1 h, which could effectively separate different emulsions. The water permeability of modified membrane was 18,271 L∙m −2 ∙h −1 ∙bar −1 . The permeability for separating isooctane-in-water emulsion arrived at 14,223 L∙m −2 ∙h −1 ∙bar −1 and the oil rejection rate was 99.6 %. After ten cycles, the separation flux was 10,836 L∙m −2 ∙h −1 ∙bar −1 with the rejection rate of 98.8 %. Modified membranes were soaked in acid and alkali salt solutions of different pH values for 30 days, and maintained good underwater oleophobic performance (>156°). The developed membrane showed excellent separation performance, oleophobic property and acid-base stability. The proposed membrane modification strategy was prospective for efficient separation of oily wastewater.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zheng Lian,Youcai Lu,Shiyu Ma,Liqin Wang,Zhongjun Li,Qingchao Liu
In Li-CO 2 battery, redox mediators (RMs) are considered to have bright prospects due to their advantages of optimizing the mediated reaction pathway and reducing over-potential. However, some inherent defects caused by RMs, such as induced Li anode degradation and electron shuttle, limit its application in Li-CO 2 battery. In this work, ruthenium acetylacetonate (Ru(acac) 3 ) was innovatively applied as an efficient RM to boost the performance of Li-CO 2 battery, and the “shuttle effect” of Ru(acac) 3 to Li anode was also confirmed. To avoid the anode degradation caused by “shuttle effect” of RM, a novel Zn-MOF nanoplate modified glass fiber (M-GF) separator is skillfully prepared and used as a dual-function separator for Li-CO 2 battery. Experiments coupled with density functional theory simulations verifies that M-GF can protect Li anode by preventing Ru(acac) 3 from entering Li anode by physical and chemical interactions. Moreover, the highly ordered micropores in Zn-MOF also induce uniform deposition of Li + on the Li anode to delay the degradation process of anode, and thus prolonged the cycle life of the battery. Thanks to the bidirectional support of Ru(acac) 3 and M-GF strategy, the electrochemical performances of the Li-CO 2 battery, especially the round-trip efficiency and cycle life, has been greatly improved.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Kaizhen Wang,Danrong Cai,Die Zou,Ruxue Duan,Wentao Yan,Yong Zhou,Congjie Gao
Developing ultrafiltration (UF) membranes with excellent anti-biological fouling and overcoming the hydrophobicity of membrane material itself has been a major challenge. While exposing a major drawback of being unstable and easily lost from the membrane, silver nanoparticles (AgNPs) are still used as bactericidal substances in membranes. Polyamic acid (PAA) is a flexible hydrophilic polymer that exhibits strong complexing ability and considerable steric hindrance effect on metal cations. Herein, using PAA as a stabilizer to modify the size and dispersion of silver nanoparticles (AgNPs), we developed a polyethersulfone (PES) UF membrane featuring both hydrophilic and antibacterial dual functions. The AgNPs in the as-prepared membrane were small in size (around 3–10 nm) and highly dispersed in the membrane, exhibiting highly efficient antibacterial ability with 96.82% and 98.29% inhibition towards Escherichia coli and Staphylococcus aureus , respectively. Meanwhile, the partially covered AgNPs by PAA and the high surface energy made them less susceptible to lose in the membrane. The developed membrane retained about 4.5 times more AgNPs than the original membrane for the same membrane area. Moreover, the favorable hydrophilic and pore structure endowed the membrane with high water flux and acceptable rejection of bovine serum albumin (BSA). The PES/PAA-Ag membrane exhibited an excellent water flux, which was 421.47 (L/m 2 ·h) under 1 bar pressure, about 1.4 times of PES and 3.4 times of PES-Ag membrane (with a high BSA rejection, around 90%). This work provided a reference for the development of hydrophilic and antimicrobial membranes, as well as having considerable potential practical value.
研究领域:
材料科学
·
化学工程
·
纳米技术
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环境科学
·
膜技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）