ACS Applied Energy Materials
·
2021
·
IF 6.024
Yuzhe Liu,Qingjuan Ren,Shuo Liang,Lin Li,Shaohui Wang,Zhiqiang Shi,Zonglin Pan,Tonghua Wang
Na2SO4 and spiro-(1,1′)-bipyrrolidinium tetrafluoroborate (SBPBF4) are very promising electrolytes with low cost and high conductivity. For matching with two electrolytes to boost the energy density of the supercapacitor, a suitable electrode needs to be fabricated. Herein, porous carbon derived from discarded polyimide films is fabricated via H3PO4-assisted KOH activation. The hierarchical pore framework of porous carbon, which consists of micro–mesopores concentrated at 0.7–1 nm and >2 nm along with abundant cracks in the cross section, increases the effective energy storage sites and facilitates the ion diffusion rate of electrolytes. The high synergy between electrolytes and the architecture of electrodes endows the symmetrical capacitors (SCs) with outstanding performance. The SC in the Na2SO4 electrolyte delivers the operating voltages of 1.8 V and an energy density of 23.2 Wh kg–1 at a power density of 450 W kg–1. In the SBPBF4 electrolyte, the SC exhibits a high withstand voltage of 3.2 V and a conspicuous energy density of 70.2 Wh kg–1 at a power supply of 320 W kg–1. This work constructs a cooperative system of porous carbon electrodes and electrolytes boosting the energy density of supercapacitors and a sustainable strategy for resource utilization of discarded polyimide films.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
npj Clean Water
·
2024
·Vol. 7
·期 1
·1-14
·
IF 10.4
Meng Wenqiao,Xue Qiang,Zhu Jinyuan,Zhang Kaisong
Incorporating hydrophilic and charged porous nanofillers to prepare high-performance thin film nanocomposite (TFN) nanofiltration (NF) membranes is an effective method to achieve efficient water treatment. In this study, we synthesize the sulfonated covalent organic framework nanosheets (S-CONs) with higher hydrophilicity and electronegativity by immobilizing sulfonic acid groups (–SO 3 H) on TpPa-1 nanosheets. The S-CONs are incorporated in the PA layer by interfacial polymerization (IP) reaction. The results indicated that the S-CONs could modulate the hydrophilicity, thickness, and electronegativity of TFN-NF membranes. At the optimal addition of S-CONs (0.006 g), the pure water permeance increases to 8.84 \({\rm{L}}\cdot{\rm{m}}^{-2}\cdot{\rm{h}}^{-1}\cdot{\rm{bar}}^{-1}\) , which is about 1.75 times than the TFC membrane, with a high Na 2 SO 4 rejection reaching 98.97%. The improvement of the separation performance mainly results from the reduction of PA layer thickness (from ~178.00–198.00 to ~100.00–128.00 nm) and the increase of surface electronegativity (from −20.37 to −44.41 mV at pH = 7.00). More interestingly, the amide bond formed between the S-CONs and TMC improved the chlorine resistance of the membranes. This study reveals the potential of using functionalized 2D CONs as nanofillers to modify TFC membranes for efficient nanofiltration.
研究领域:
材料科学
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环境工程
·
水处理
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shengming Zhu,Yawen Sun,Keke Li,Yuan Dang,Xuemao Guan
Structured supercapacitors (SSCs) based on building materials have been recognized as potential devices for large-scale energy storage applications due to the huge volume and porosity. However, the decoupling of electrochemical properties and load-bearing capacity of building material-based electrolytes hinders the development of SSCs and the lack of compatible electrodes to match the electrolytes. In this work, SSCs with high energy density are successfully fabricated by designing a polyacrylamide (PAM)-Portland cement-Na 2 SO 4 electrolyte with high compressive strength/ionic conductivity and assembling asymmetric dual carbon electrodes with the electrolyte. For the electrolyte, the PAM interacts with Portland cement to both maintain the compressive strength of SSCs (41.3 MPa) and offer a channel for the transport of charged ions generated from Na 2 SO 4 which provides high ionic conductivity (40.9 mS cm −1 ). For the electrodes, the large-surface-area dual-carbon electrodes with different kinds of functional groups are rich in active sites for energy storage and have good contact with the electrolyte. Assembled with the electrodes and the electrolyte, SSCs exhibit the maximum energy density of 2.1 W h kg −1 at the power density of 1.62 W kg −1 . This construction of the SSCs shows promise in simultaneously meeting the demands of structural function and energy storage.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Biao Hu,Jiachen Li,Xin Du,Zhenying Zhang,Hui Wang
A novel eutectic phase change material with light absorption and high thermal conductivity was successfully prepared. The based phase change material was ammonium aluminum sulfate dodecahydrate‑sodium sulfate eutectic phase change materials. The black Ti 2 O 3 after ball milling was selected as light thermal conversion material which can absorb sunlight effectively and simultaneously convert the light to thermal and the expanded graphite was added to further improve the thermal conductivity of phase change materials. The phase change temperature of the eutectic phase change material was effectively regulated to 80 °C compared with 93 °C of pure aluminum sulfate dodecahydrate. The thermal conductivity of eutectic phase change materials with expanded graphite was enhanced to 1.16 W·m −1 ·K −1 compared with 0.53 W·m −1 ·K −1 of the pure eutectic phase change material. By adding Ti 2 O 3 , the combination material shows the best solar absorbance capacity of 87.96 % compared with the pure eutectic phase change materials of 73.43 %. The latent heat of the novel material was 190.97 kJ/kg. Considering their huge superiority of highly efficient use of solar energy in natural resources, the new novel ammonium aluminum sulfate dodecahydrate‑sodium sulfate eutectic-based phase change material with excellent light absorbance, enhanced thermal conductivity, and high latent heat performance is a very promising material for solar-thermal conversion and energy storage.
研究领域:
材料科学
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能源工程
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太阳能技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Rongrong Li,Jian Wan,Yingjie Zhang,Danxia Liang,Bin Zhang,Chenghong Li
The equilibrium solubility of sodium 1-naphthalenesulfonate in binary NaCl + water, Na2SO4 + water, and C2H5OH + water solvent mixtures was measured by a steady-state method at elevated temperatures from (278.15 to 323.15) K. The results of these data were correlated by a modified Apelblat equation. The dissolution enthalpy (ΔHd) and entropy (ΔSd) of sodium 1-naphthalenesulfonate in solutions of different mole fraction were obtained.
研究领域:
物理化学
·
热力学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Kelin Peng,Jinghua Zhang,Jueying Yang,Lizhi Lin,Qiang Gan,Ziming Yang,Yu Chen,Changgen Feng
Conductive hydrogels (CHs) are ideal electrolyte materials for the preparation of flexible supercapacitors (FSCs) due to their excellent electrochemical properties, mechanical properties, and deformation restorability. However, most of the reported CHs are prepared by the chemical crosslinking of synthetic polymers and thus usually display the disadvantages of poor self-healing abilities and nonadaptability at environmental temperatures, which greatly limits their application. To overcome these problems, in the present work, we constructed a sodium alginate–borax/gelatin double-network conductive hydrogel (CH) by a dynamic crosslinking between sodium alginate (SA) and borax via borate bonds and hydrogen bonding between amino acids in gelatin and SA chains. The CH displays an excellent elongation of 305.7% and fast self-healing behavior in 60 s. Furthermore, a phase-change material (PCM), Na2SO4·10H2O, was introduced into the CH, which, combined with the nucleation effect of borax, improved the ionic conductivity and temperature adaptability of the CH. The flexible supercapacitor (FSC) assembled with the obtained CH as the electrolyte exhibits a high specific capacitance of 185.3 F·g–1 at a current density of 0.25 A·g–1 and good stability with 84% capacitance retention after 10 000 cycles and excellent temperature tolerance with a resistance variation of 2.11 Ω in the temperature range of −20–60 °C. This green CH shows great application potential as an electrolyte for FSCs, and the preparation method can be potentially expanded to the fabrication of self-repairing FSCs with good temperature adaptabilities.
研究领域:
材料科学
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电化学
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纳米技术
·
能源存储
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DOI
高影响因子
Biomass Conversion and Biorefinery
·
2020
·Vol. 11
·期 5
·1931-1941
·
IF 2.602
Tian Xiatian,Qi Benkun,Zhang Shaofeng,Luo Jianquan,Wan Yinhua
5-Hydroxymethylfurfural (HMF) is a promising platform chemical for production of value-added chemicals and fuels. Conversion of abundantly available and cheap sucrose for HMF synthesis was systematically investigated in the present study. Results showed that Lewis acid AlCl 3 is effective in catalytic transformation of sucrose. Combining AlCl 3 with different Brønsted acids, no matter whether they were inorganic acids (HCl, H 2 SO 4 , and H 3 PO 4 ) or organic acids (malic acid, succinic acid, and oxalic acid), or variation of ratio of Lewis acid/Brønsted acid represented by AlCl 3 /HCl, did not change the obtained maximum HMF yields compared with AlCl 3 alone, but shortened the time required to reach the maximum HMF yield. Sucrose conversion in a green reaction media of aqueous γ-valerolactone (GVL) solvent resulted into comparable HMF yields with dimethyl sulfoxide (DSMO)-water system. Addition of monovalent salt NaCl and divalent salt Na 2 SO 4 produced opposite effect with Cl − promoting while SO 4 2− inhibiting HMF production. Furthermore, HMF synthesis from constituent monosaccharides of sucrose and molasses, a by-product from sugar manufacturing process, was also carried out and it was found that an equivmole mixture of glucose and fructose gave rise to almost identical HMF yield to the same mole of sucrose. Molasses, even after chemical pretreatment for removal of certain amount of inorganic salts and color substances, was significantly inferior to synthetic molasses in terms of HMF formation, indicating the complexity and difficulty in chemical valorization of molasses for production of platform molecules.
研究领域:
化学工程
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绿色化学
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生物化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Kai Li,Wen Xi,Xinyue Ma,Li Long,Senlin Shao
Nanofiltration (NF) technology has been extensively applied in diverse water treatment scenarios, with a growing emphasis on improving its selective separation of different salts. While existing research broadly linked pore size and surface charge to separation performance, the differential impacts of these two characteristics on specific salts remain unclear. Herein, this study systematically investigated specific effects of polyamide pore size and surface charge on salt rejection and selectivity of NF membranes. By decreasing piperazine concentration in the support-free polyamide formation, we fabricated a series of NF membranes with progressively increasing pore size and surface charge. CaCl 2 rejection exhibited the strongest correlation with surface charge ( R 2 = 0.86), while Na 2 SO 4 rejection showed highest dependence on pore size ( R 2 = 0.88). In addition, CaCl 2 /Na 2 SO 4 selectivity exhibited a two-stage dependence on pore size, peaking at a threshold around 0.6 nm. This suggested potential optimizations for CaCl 2 /Na 2 SO 4 selectivity, where polyamide pore size can be well-tuned to approach the threshold with maximizing surface charge. Moreover, the NF membrane with higher CaCl 2 /Na 2 SO 4 selectivity exhibited the better anti-scaling propensity, with a significant reduction in irreversible scaling ratio. Our findings provided insights into the regulation of polyamide pore size and surface charge for achieving the high salt/salt selectivity of NF membranes.
研究领域:
环境工程
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膜科学
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水处理
·
分离技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yiqi Xie,Shiya Lin,Ling Wang,Pengcheng Lin
Cold chain transportation of prefabricated foods mainly relies on sustained mechanical refrigeration with high power consumption and high cost. In this study, a green, safe, efficient and low-cost solution for prefabricated food cold chain based on NaCl@Na 2 SO 4 eutectic brine phase change cold storage gel (BPCCSG) is proposed. BPCCSG is prepared by liquid homogenization, polymer cross-linking and thermal conductive filler dispersion. The phase transition temperature of BPCCSGs is −21.73 °C, which is suitable for refrigeration temperature of a typical type of prefabricated food (shrimp meat). The phase change latent heat and thermal conductivity are as high as 167.64 Jg -1 and 0.856 Wm −1 K −1 , respectively. Gel packaging avoids the leakage of BPCCSGs and its harm to the integrity of prefabricated foods. By optimizing the distribution of BPCCSGs in the cold storage equipment, the temperature uniformity inside the equipment can be effectively improved. The economic benefit of BPCCSG is as low as 5.36 × 10 −4 $J −1 . By introducing 5G sensors, temperature and position of cold storage equipment are monitored in real time. Finally, BPCCSGs are successfully applied in cold chain of shrimp prefabricated foods to effectively guarantee the quality. This work provides forward-looking guidance for next generation of state-of-the-art cold chain solutions for prefabricated foods.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiancai Jiang,Siqi Wei,Jinquan Wang
Hydrogel electrolytes are ideal for flexible wearable electronic devices because of their high ionic conductivity, flexibility, and biocompatibility. However, some problems, such as poor mechanical properties, low conductivity, and lack of adhesivity, are encountered in the process of hydrogel preparation and application, which restrict the further development of hydrogel electrolytes. In this study, PVA was used as the first network, and P(AM-co-AMPS) as the second network to prepare a double-network hydrogel electrolyte. Laponite and Na2SO4 were introduced into the hydrogel during hydrogel formation as the nanofiller and salt with the salting-out effect to enhance its mechanical properties. The hydrogel electrolyte with high toughness (1663 kJ·m–3), adhesivity (77 kPa), and ionic conductivity (1.7 S·m–1) was obtained. In addition, the hydrogel electrolyte also has excellent antifatigue performance. In the 10 consecutive tensile cycles, the tensile strength does not decay. Due to the high adhesivity of the hydrogel electrolyte, a symmetrical all-solid-state supercapacitor was assembled with a tight interface between the hydrogel electrolyte and the AC/CNT composite electrode. The supercapacitor has a high specific capacitance of 186.1 mF·cm–2 at the current density of 1 mA·cm–2. In addition, the capacitor has good flexibility and can withstand bending at various angles. The hydrogel electrolyte also has excellent strain sensing performance, with an ultrafast tensile response time (0.17 s) and high sensitivity factor (GF = 10.01). Finally, the self-powered sensor system composed of a supercapacitor as the power supply device and hydrogel electrolyte as the sensing part was obtained and applied to human motion monitoring, which provides a potential application in the integrated flexible electronic system.
研究领域:
材料科学
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电化学
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纳米技术
·
柔性电子
·
可穿戴设备
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能源存储
·
传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Hengrao Liu,Jing Gao,Guanhua Liu,Miyu Zhang,Yanjun Jiang
Thin film nanocomposite (TFN) membranes were invented in 2007 to enhance the permeability of thin film composite (TFC) membranes. Surface modification of nanofillers was a common method to improve the interaction and compatibility at polymer/nanofiller interfaces. Accordingly, as an amino-functionalized zirconium-based metal–organic framework (MOF), UiO-66-NH2 was synthesized and introduced into the preparation of TFN membranes via interfacial polymerization in this study. The superhydrophilic characteristic of UiO-66-NH2 made it possible to be well dispersed in aqueous solution and the amino groups on particle surfaces could react with 1,3,5-benzenetricarboxylic acid chloride (TMC) to form covalent interaction with polymer thus inhibiting the formation of nonselective defects at PA/nanofiller interfaces. The morphology images and FT-IR spectra revealed the PA selective layer successfully formed on the top of hydrolyzed polyacrylonitrile (HPAN) supports. The EDX characterization demonstrated UiO-66-NH2 nanoparticles were successfully introduced into the TFN membranes. The UiO-66-NH2 nanoparticles increased the surface hydrophilicity and roughness of the membranes, and provided additional passageways for mass transfer. Pure water permeability increased from 6.89 LMH/bar for TFC membrane to 14.55 LMH/bar for TFN-0.10 membrane indicating the distinct permeability elevation after the incorporation of UiO-66-NH2 nanoparticles. And the Na2SO4 rejection of TFN-0.10 membrane was up to about 99.0% and NaCl rejection was 38.1% at 4 bar, which was higher than that of TFN membrane incorporated with pristine UiO-66.
研究领域:
材料科学
·
化学工程
·
膜技术
·
纳米技术
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产品关联
DOI
高影响因子
Water
·
2025
·Vol. 17
·期 19
·
IF 3
Trung-Kien Pham,Quynh-Trang Thi Hoang,Cham-Anh Thi Le,Thi-Huyen Tran,Koemhong Bun,Ngoc-Tuyet Thi Le,Van-Son Ho,Van-Hieu Ngo,Quang-Duyen Le,Madina Naukanova
Water shortage has been a serious issue for many years. Hydrate-based desalination (HBD) technology is a potential candidate for this solution. The present study investigates the use of Cyclopentane (CP) as a hydrate former for desalination through crystallization at low temperatures and atmospheric pressure. The primary objective of this work is to provide phase equilibrium data for CP hydrates (CPH) in the presence of novel salt systems, including NaBr, KBr, K2SO4, NaBr–KBr, NaCl–NaBr, KCl–KBr, Na2SO4–K2SO4, and CaCl2–MgCl2. Phase equilibrium temperatures were determined using both rapid and slow dissociation procedures. The van der Waals and Platteeuw-based Kihara (Kihara) approach, Hu-Lee-Sum (HLS) correlation, Standard Freezing Point Depression (SFPD) approach, and Activity-Based Occupancy Correlation (ABOC) were applied to model these new experimental data. The experimental results demonstrate that the differences between the quick and slow procedure data range from 0 °C to 1.2 °C. In addition, the increasing salt concentration enhances the inhibitory effect on hydrate formation. Furthermore, the influence of cations on the equilibrium temperature follows the decreasing order of Mg2+> Ca2+> Na+> K+. In terms of halide anions, Br−exhibits a stronger impact on equilibrium temperature compared to Cl−. The thermodynamic modeling results (for all four models) show good agreement with the experimental data with the average absolute deviation (AAD) of less than or equal to 0.79 °C. The ABOC approach proves to be the most effective among the four methods evaluated for accurately reproducing the equilibrium temperature of CPH, with AAD less than or equal to 0.38 °C.
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DOI
高影响因子
危险品化学品经营许可证（带存储）