INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·
IF 3.313
Yang Fan,Peifang Liu,Bing Zhu,Shufang Chen,Kaili Yao,Ran Han
The tree biomass acacia gum was used as a natural precursor to synthesize microporous carbon for energy storage application . The microporous carbons were synthesized by hydrothermal carbonization of acacia gum at 180 °C, and subsequent activation by KOH at temperatures in the range of 700−900 °C. The carbon materials possess high surface area and well-controlled pore size distribution . Moreover, the porosity can be finely tuned by modifying the activation temperatures. The influence of the porosity of the carbon materials on their capacitive performance was investigated. The superior charge storage capability with specific capacitance up to 272 F g −1 at current density of 1 A g −1 in 6 M KOH was achieved by the as-prepared microporous carbons.
研究领域:
材料科学
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能量存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Run Li,Ying Yang,Zezhou Zhang,Shaohan Lian,Quan Zhao,Chunfeng Song
As a promising strategy to reduce greenhouse gas emissions, carbon dioxide capture from industrial and power plants has been proposed. Due to its advantages of low consumption and a modest environmental impact, membrane technology has been widely used in the gas separation process. Advanced porous fillers can be successfully added into the polymer matrix to create mixed matrix membranes (MMMs) with simple processing and applicable gas separation performance. The high porosity and stability of microporous carbon materials make them desirable for use in the gas separation process. Herein, N-doped microporous carbon microparticles (NMCP) were successfully synthesized and incorporated into UV crosslinked polyethylene oxide (XLPEO) matrix membranes. Fast CO 2 transport channels are created in MMMs by rationally constructing NMCP fillers with ultra-micropores (∼0.53 nm), high-content heteroatoms (N, 13.94%), and two-dimensional morphology. The relationship between the structure of the NMCP samples and the gas separation performance of MMMs was discussed. Additionally, tests were conducted on the effects of NMCP loading, operating conditions, and long-term stability of NMCP/XLPEO membranes. NMCP/XLPEO membranes with a 2.5 wt% NMCP loading displayed a CO 2 permeability of 606 Barrer and a CO 2 /N 2 selectivity of 56.4, approaching the 2019 upper bound. This work offers a novel perspective to build fast gas transport channels in porous carbon-based MMMs for carbon capture.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Qizhen Zhu,Qian Zhao,Yabin An,Babak Anasori,Haoran Wang,Bin Xu
Lithium-sulfur (Li-S) batteries are one of the most promising energy storage systems with high energy density . However, they suffer from fast capacity fading due to the shuttle of the dissolved polysulfides . Using small sulfur molecules (S 2–4 ) as cathodes can avoid the shuttle problem, but the preparation of ultra-microporous carbon to encapsulate S 2–4 is challenging. Here, we report a Li-S battery with an excellent cycling performance by using a unique ultra-microporous carbon (UMC) with a uniform pore size of 0.55 nm. The UMC was synthesized from PVDF via a facile pyrolysis process to only accommodate small S 2–4 molecules and eliminate large S 8 molecules. This S/UMC composite electrode is compatible with the carbonate-based electrolyte used in Li-S batteries. The resulting battery shows a typical discharging profile with only one long potential plateau because the reductions from cyclo-S 8 to dissolved polysulfides and consequence shuttle problem are avoided. The S/UMC composite retains a capacity of about 852 mAh g −1 and Coulombic efficiency approaching 100% after 150 cycles at 0.1 C and delivers a long-term cycling at 1 C for 1000 cycles with only around 0.03% capacity loss per cycle. We also tested this S/UMC composite electrode in Na-S systems and observed similar electrochemical behaviour. These results indicate that the S/UMC composite is a promising candidate as an electrode material in Li-S and Na-S batteries and related systems.
研究领域:
材料科学
·
电化学
·
能源存储
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纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
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2019
·
IF 5.383
Di Wu,Weiqin Wang,Yanna NuLi,Jun Yang,Jiulin Wang
To enhance the electrochemical performance of Se cathode for high-energy-density magnesium-selenium (Mg–Se) batteries with easily prepared nucleophilic (PhMgCl) 2 -AlCl 3 +LiCl/THF (APC-based) hybrid electrolyte, Cu doped Se@MC composites (Cu–Se@MC) with different Cu content (0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) are prepared by impregnation reduction and melting selenization method. The composites are composed of a mixture of chain-structured Se and CuSe embedding in the microporous carbon, and the addition of Cu significantly improves reversibility and cycle life of the composites in the nucleophilic APC-based hybrid electrolyte. At the 0.25 Cu content, the cell exhibits 346.7mAhg −1 first discharge capacity and the specific capacity maintains at 112mAhg −1 after 200 cycles at a current density of 50 mA g −1 , which is superior to that with non-nucleophilic Mg(HMDS) 2 -(AlCl 3 ) 2 –MgCl 2 +LiTFSI/DME (HMDS-based) and MBA-(MgCl 2 ) 2 –(AlCl 3 ) 2 +LiCl/THF (MBA-based) hybrid electrolytes.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 31
·13906-13913
·
IF 4.197
Kunpeng Song,Peng Liu,Jingyu Wang,Lei Pang,Jian Chen,Irshad Hussain,Bien Tan,Tao Li
Novel dual-porous carbon-supported palladium nanoparticle (Pd NP) catalysts were prepared by sequential carbonization and reduction of microporous organic polymer-encaged PdCl2. The diverse pore structure of microporous organic polymers provides a reservoir for the palladium precursors and prevents Pd NPs from sintering during the carbonization and reaction. The microporous structure has a significant effect on the size and dispersion of palladium NPs. The average size of the Pd NPs (in the range of 4–6 nm) was tuned by changing the pore size distribution and the carbonization temperature. The resulting carbon-supported Pd NPs were characterized by TEM, BET, XRD, and XPS and the Pd loading was calculated by AAS. The encaged Pd NP catalysts prepared by this methodology exhibited outstanding stability and reusability in the Heck reaction and could be reused at least 10 times without appreciable loss of activity.
研究领域:
材料化学
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纳米催化
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有机合成方法学
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多孔材料
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绿色化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 41
·2300329
·
IF 19
Xingjiang Wu,Xude Yu,Zekai Zhang,Hengyuan Liu,SiDa Ling,Xueyan Liu,Cheng Lian,Jianhong Xu
Fibrous supercapacitor (FSC) is of great attention in wearable electronics, but is challenged by low energy density, owing to disordered diffusion pathway and sluggish redox kinetics. Herein, using micro-reaction strategy, an anisotropic superstructure is developed by in situ anchoring ultrafine zinc sulfine (ZnS) nanoclusters on conductively ordered macro-microporous carbon skeleton via interfacial C S Zn bonds (ZnS/SOM-C). The anisotropic superstructure affords 3D ordered macro-microporous pathways, large accessible surfaces, and highly dispersed active sites, which exhibit enhanced electrolyte mass diffusion, rapid interfacial charge transfer, and large faradaic ions storage (capacitance of 1158 F g −1 in KOH aqueous solution). By microfluidic spinning, the ZnS/SOM-C is further assembled into fibrous electrode of FSC that delivers high capacitance (791 F g −1 ), commercial-level energy density (172 mWh g −1 ), and durable stability. As a result, the FSC can realize wearable self-powered applications (e.g., self-cleaning ventilatory mask, smartwatch, and display), exhibiting the superiority in new energy and wearable industry.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2023
·
IF 4.6
Wenzhe Luo,Longsheng Cao,Ming Hou,Yawen Zhou,Zhiwei Ren,Jiangtao Geng,Zhigang Shao
Developing a low-price, high catalytic activity, and strong durability electrocatalyst for alkaline oxygen reduction reaction (ORR) is significantly important for anion exchange membrane fuel cell (AEMFC). Herein, Co and Mn salts were added into ZIF-8 to obtain CoMn-ZIF-Ac-2. Co and Mn embedded in nitrogen-doped microporous carbon (CoMn-N-C-Ac-2-Ts, , 800, 900, and 1000°C) were obtained by carbonizing CoMn-ZIF-Ac-2 at various temperature. The influence of various pyrolysis temperature and molar ratios between Co and Mn toward ORR catalytic activity was researched. For CoMn-N-C-Ac-2-Ts, CoMn-N-C-Ac-2-800 had the highest ORR catalytic activity with the half-wave potential of 0.875 V in 0.1 M KOH, only 5 mV lower than that of 20 wt % Pt/C. Besides, high 4e- selectivity, excellent stability (retaining 100% for 20 h at 0.6 V vs. RHE), and methanol tolerance are also exhibited. In addition, CoMn-N-C-Ac-2-800 exhibited better ORR activity than Mn-N-C-Ac-800 and Co-N-C-Ac-800, which was attributed to more Co-N4, more MnIII species, and higher surface area. Moreover, the AEMFC based on the CoMn-N-C-Ac-2-800 cathode catalyst obtained a maximal power density of 291 mW·cm-2, which was 78% of the achieved with 20 wt % Pt/C (375 mW·cm-2). The highest ORR performance for CoMn-N-C-Ac-2-800 was contributed by the highest defect degree, the most amounts of Co/Mn-N4 active site, the maximum BET surface area, and micropore structure.
研究领域:
材料科学
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电化学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Mengxue Zhang,Liheng Xu,Changli Qi,Ming Zhang
To improve the removal efficiency of pharmaceutical antibiotics from water by adsorption technologies, it is vital to optimize the porous geometrical structure of carbonaceous adsorbents. In this study, a hierarchical porous carbon that possesses micro/meso bimodal pores (MMC) is synthesized and is employed in the adsorption of tetracycline in both batch mode and column mode. In comparison, microporous carbon, mesoporous carbon, and commercial activated carbon (AC) are induced as carbonaceous adsorbents. In batch mode adsorption, the maximum adsorbed amount of tetracycline on MMC reaches 701.31 mg/g, which is twice as much as that on AC. While in the column adsorption process, the treatment capacity and the total adsorbed amount of MMC toward tetracycline are found 10 times greater than those of AC. The porous geometrical structure of the adsorbent is revealed to play an important role in determining the adsorption efficiency in the column adsorption process with a limited contact time. The surface utilizations of MMC in the column process keep similar to that in batch adsorption, which is totally different from the remarkable decreases in other studied adsorbents. The specific bimodal porous structure of MMC benefits the full play of its adsorption potential in column operation. The channel-like mesopores of MMC are helpful in providing a low resistance for the rapid transport of tetracycline molecules, and the micropores further enhance the accessibility and availability of adsorption sites.
研究领域:
环境科学
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材料科学
·
水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shengqiang Zhang,Tengdiao Zhang,Miao Huang,Razium Ali Soomro,Xiaojie Liu
Microporous carbons are promising sulfur hosts for room temperature sodium–sulfur (RT Na–S) batteries. Yet, most designs primarily focus on confining small S 2 – 4 molecules and overlook the sluggish redox of short-chain polysulfides (Na 2 S ₙ , n ≤ 4), which accumulate as insulating Na 2 S/Na 2 S 2 . Herein, we report a Cu-MOF-derived microporous carbon bearing both carboxyl ( COOH) and amide ( CONH 2 ) groups (denoted MPC-Cu). The unique 0.5–0.8 nm uniform pores effectively physically lock S 2 – 4 molecules, eliminating long-chain polysulfides (Na 2 S ₙ , 4 < n ≤ 8) shuttling. Density functional theory (DFT) calculations and electrochemical analysis confirm that COOH groups enhances Na 2 S ₙ adsorption (binding energy −1.51 eV for Na 2 S 4 ) and promotes Na + diffusion (ranging from 10 −9 –10 −11 cm 2 s −1 ), whereas CONH 2 groups lower the Na 2 S oxidation barrier from 1.16 eV to 0.70 eV. Consequently, S/MPC-Cu cathode delivers long-term cycle performance (571.5 mAh g −1 at 2 A g −1 with a capacity retention of 83 % over 1000 cycles) and outstanding rate performance (504.1 mAh g −1 at 5 A g −1 ). This work provides a novel strategy in designing microporous carbon catalysts for cathodes of high-capacity, long-life RT Na S batteries.
研究领域:
材料化学
·
电化学
·
能源存储
·
纳米材料
·
催化化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Cunyin Zhang,Leibin Guo,Chengwei Deng,Haili Huang,Yuanhui Cheng
Aqueous zinc-based flow battery has advantages of low cost, high safety and abundant reservoir, showing a good application prospect. However, zinc dendrites remain a big issue to their cycling stability. Herein, we construct a multi-structured semi-solid anode by packaging multi-layered graphite felt and zinc slurry based on microporous carbon wrapped nano-ZnO ( [email protected] ). [email protected] is prepared by polymerizing dopamine on nano-ZnO and followed calcination . Microporous carbon shells act as restriction spaces, forbidding either oxidized or reduced zinc species flow out, but also serve as the first electron network. Meanwhile, carbon black and graphite felt function as the second and third electron networks. Besides, trace alkaline solutions deliver hydroxyl ions. Thus, the redox of zinc species proceeds in microporous carbon shells without zinc dendrites. Resultantly, semi-solid anode has high electrochemical activity and stability in zinc-iron flow batteries. The average efficiency is 74.8％ with negligible fluctuations over 840 h (460 cycles).
研究领域:
储能技术
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Lirong Bi,Xinwei Sui,Shuo Tian,Xiaowei Liu,Shicheng Ma,Zhongqiu Liu,Yujing Liu,Anguo Ying
Flow electrode capacitive deionization (FCDI) holds great promise for next-generation desalination, yet its advancement is fundamentally constrained by sluggish electron conduction and poor ion selectivity under multivalent interference. Herein, we conceive a semi-anchoring strategy that covalently binds polymeric ionic liquids (PILs) onto ultra-microporous carbon nanospheres (UCNs), constructing a UCNs@PILs composite featuring an ion-selective charge percolation network. This design unlocks dual-functionality: it not only enhances electron mobility via continuous conductive pathways, but also enables sodium-preferred transport through a synergistic “push-pull” effect, as revealed by DFT and COMSOL simulations. Strikingly, this strategy allows the carbon slurry loading to be reduced from the conventional 5-15 wt% [1] to just 3.33 wt% without conductive additives, approaching the lowest value ever reported in FCDI. As a result, the system delivers a 28.00 % increase in desalination efficiency, an 18.26 % reduction in energy consumption, and a 39.40 % enhancement in ion selectivity, while its ion selectivity matches that of state-of-the-art carbon-based materials. This work not only overcomes electron conduction discontinuity and ion transport limitations, but also establishes the semi-anchoring framework for achieving ultra-low percolation thresholds with high ion selectivity, offering a new paradigm for the scalable design of advanced FCDI electrodes.
研究领域:
环境科学
·
材料科学
·
化学工程
·
能源技术
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zirun Chen,Shaohong Liu,Luyi Chen,Junlong Huang,Bingna Zheng,Wen Huang,Shimei Li,Yuheng Lu,Ruowen Fu
Carbon aerogels have attracted increasing research interest in a wide range of potential applications owing to their unique structural features, yet the scalable preparation of carbon aerogels configured by nanoporous carbon skeletons with high surface area and precise pore structure is a great challenge. Herein, we report a molecular-scale interface engineering concept for high-throughput and scalable production of well-defined microporous carbon aerogels (MPCAs) based on simple and fast polycondensation (<8 s) of dialdehyde with silsesquioxane. Benefiting from the unique organic/inorganic hybrid molecule structure, the silsesquioxane favours the formation of molecular-scale silica templates with uniform carbon source/template interface. The resulting MPCAs exhibit 3D interconnected macroporous framework combined with well-defined micropore skeleton and large surface area. These intriguing features render MPCAs superb pore accessibility and utilization, and thus they demonstrate great promise as adsorbent materials for rapid removal (<10 s) of organic micropollutants with high uptake, and as electrocatalyst supports for incorporation of metal-nitrogen-carbon species with excellent activities.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）