JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qingtian Li,Tao Wang,Baiyu Guo,Xin Qiao,Xing Meng,Di Jin,Hailong Qiu
As a conversion-type cathode material, FeS 2 emerges as a promising candidate for the next generation of energy storage solutions, attributed to its cost-effectiveness, environment-friendliness and high theoretical capacity. However, several challenges hinder its practical application, including sluggish kinetics, insulating reaction products and significant volume fluctuation during cycling, which collectively compromise its rate capability and cycle stability. Herein, a well-designed sandwich structure of FeS 2 embedded between graphite layers (FeS 2 /C) is obtained using a chloride intercalation and sulfidation strategy. The layered graphite-FeS 2 -graphite configuration boosts the active sites and adsorption capacity of Li + , thereby guaranteeing a high reversible capacity. Furthermore, the graphitic carbon matrix serves a dual purpose: it enhances electronic conductivity and restrain the volume fluctuation of FeS 2 during long cycling. This combination ensures robust electrochemical kinetics, structural integrity and long life. Consequently, the FeS 2 /C composites exhibit exceptional lithium storage performance, achieving capacities of 506.2 mAh g −1 at 0.5 A/g and 277.2 mAh g −1 at 5.0 A/g. Additionally, the FeS 2 /C composites show promising potential as cathodes for all solid-state lithium batteries, showcasing high specific capacities of 658.0 mAh g −1 at 0.1 A/g for the second cycle and maintaining a cycle performance of 288.5 mAh g −1 after 800 cycles at 0.5 A/g. These values surpass the second discharge specific capacity of 96.1 mAh g −1 and cycle capacity of 25.3 mAh g −1 observed for Fe 2 O 3 /C composites. The discharge mechanism of FeS 2 /C composites was further characterized through in-situ transmission electron microscope test. This work provides valuable insights for designing and synthesizing FeS 2 , highlighting its potential for lithium ion storage and all solid-state lithium batteries.
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 POWER SOURCES
·
2024
·
IF 8.1
Nan Zhang,Hongpeng Zheng,Guoyao Li,Cheng Ouyang,Yu Yang,Hong Zhu,Rongzi Zhang,Haidong Sun,Chenglan Zhang,Hezhou Liu,Huanan Duan
Lithium metal is an important strategic resource with diverse industrial applications such as glass, ceramics, and alloys. With the increasing demand for lithium, lithium extraction from brines has become the focus of attention. However, due to the similarity of the radii of Li + and Mg 2+ , conventional lithium extraction methods are inefficient for lithium extraction from brines with a high Mg/Li ratio. Herein we propose a direct electrolytic extraction of lithium (DEEL) system based on a sandwich-structured LLZTO (Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 ) electrolyte with excellent water stability. The lanthanum zirconate (La 2 Zr 2 O 7 ) on the surface of this sandwich-structured LLZTO can achieve high stability to water and air while still maintaining high ionic conductivity (7.5 × 10 −4 S cm −1 ) and low lithium interface resistance (40 Ω cm 2 ). This sandwich-structured LLZTO has been successfully demonstrated to stably extract lithium from simulated and natural brines. The current density for lithium extraction can reach 0.5 mA cm −2 , corresponding to a lithium extraction rate of 126 μg cm −2 h −1 ; the electrochemical extraction devices can stably work for 48 h; the current efficiency can reach 97.71 %. The extracted lithium metal exhibits a purity of 99.475 wt%. This work provides a highly efficient approach for extracting lithium from brines by electrolysis.
研究领域:
材料科学
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电化学
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资源工程
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 8
·期 1
·1-12
·
IF 23.2
Wu Zijian,Wang Zhengfang,Wang Meng,Zang Defeng,Long Haiyong,Sun Mingqi,Weng Ling,Guo Ning,Gao Junguo
In this paper, h-BN was firstly exfoliated into functionalized BNNS by ball milling and liquid phase exfoliation techniques. BNNS/PVA composite fiber film was subsequently obtained by electrostatic spinning to realize the directional arrangement of BNNS in the PVA matrix, and BNNS/PVA/PS composite film was obtained by filling the pores inside the fiber film with PS solution. To further improve the thermal conductivity of the composite, carboxylated MWCNT was selected as the second thermally conductive filler, and the MWCNT/PVA/PS composite film was prepared by the same preparation method as BNNS/PVA/PS composite film. Finally, the MWCNT/PVA/PS composite film was placed in the middle layer, the BNNS/PVA/PS composite film was placed in the outer layer, and the thermally conductive composite materials with a novel sandwich structure were obtained by lamination. The combination of electrostatic spinning and hot pressing technology enabled the efficient construction of a high thermal conductivity network with BNNS and MWCNT, and the sandwich structure achieved a balance between high thermal conductivity and electrical insulation. The composite achieved a significant improvement in its in-plane thermal conductivity due to the realization of the directional arrangement of the filler in the in-plane direction. At a filler content of 14.75 wt%, the in-plane thermal conductivity of the composite was increased to 4.69 W/mK, which is nearly 23 times higher than that of the pure polymer. Due to the strict control of the spatial distribution form of MWCNT, the composites still have excellent insulation properties even at high filler content.
研究领域:
材料科学
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热管理技术
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产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Wang Fangmiao,Zhou Jiazuo,Qiao Lei,Hu Senwei,Ji Xinyao,Sun Xiaohan,Sun Miao,Liu Yifan,Li Yudong,Yao Taikun,Zhu Jinliang,Ma Qichao,Gu Yuehe,Cui Shuting,Yang Haiyue,Wang Chengyu
Integrating passive radiative cooling techniques with wearable fabrics has gained prominence in addressing global warming-induced energy demands, environmental concerns, and health risks due to their superior and practical personal thermal management capabilities. However, conventional passive radiative fabrics are normally static, thereby failing to dynamically respond to ever-changing and uncontrollable environmental conditions, posing significant challenges to dynamic regulation in personal thermal management. Herein, inspired by the multilayered architecture of the bright silver scales of Curetis Acuta Moore , an electrospun sandwich structure is developed, which integrates passive radiative cooling and latent heat storage, concurrently achieving sub-ambient cooling and efficient thermal shock resistance. The sandwich biodegradable phase-change metafabric (SBPM) is developed that achieves excellent radiative cooling performance with a sub-ambient temperature drop of 6.8 °C under sunlight, including ultrahigh solar reflectance (97.2%) and infrared emittance (92.3%). The average temperature rises 1.8 °C above the ambient temperature due to the phase-change material releasing latent heat when the temperature is lower than the comfortable temperature of the human body. Furthermore, supported by comprehensive life cycle assessment, this efficient cooling textile demonstrates biodegradability while maintaining a reduced environmental footprint. The temperature-adaptive SBPM enables self-adaptive radiative cooling modulation, establishing a versatile platform for smart multifunctional fabrics that facilitate precision human–climate interaction in real-world scenarios. Graphical
研究领域:
纺织工程
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材料科学
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环境科学
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仿生学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chengyan Gao,Mantong Zhao,Shiyu Zeng,Jianfei Pei,Xinwen Wang,Chuan Li,Weimin Zhang,Zhongyuan Liu
In this study, a sandwich structure thin-film composite forward osmosis (TFC-FO) membrane based on calcium-carboxyl interfacial polymerization was synthesized using tannic acid-Fe (TA-Fe) as the interlayer. Additionally, the concentration effect of Ca 2+ surface modification, TA-Fe intermediate layers, and their combination on coconut water concentration, membrane efficiency, anti-fouling ability, and quality of the concentrate was investigated. Compared to the TFC-Ca or TFC-TA-Fe membrane, the TFC-TA-Fe-Ca membrane significantly enhanced the concentration effect and reverse salt flux ( p < 0.05) and exerted the lowest attenuation of permeability. Furthermore, the total soluble solids content increased from 5.13 °Brix to 13.17 °Brix after 8 h. The TFC-TA-Fe-Ca membrane showed a 61.20 % increase in its efficiency compared to the TFC membrane. The total reducing sugar, acids, and polyphenol contents increased by 1.72, 1.34, and 1.22 times, respectively. Overall, the sandwich structure FO membrane exhibited significant feasibility and potential for industrial application in fruit juice concentrate production.
研究领域:
食品科学
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材料科学
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生物工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xuan Luo,Xiangpeng Kong,Peng He,Jian Shao,Kang Li,Weiwei Zhao
The rational design and assembly specific structures consisting of multiple components with distinctive features are promising strategies for developing advanced materials for efficient sodium storage. Herein, a novel hierarchical sandwich-liked structure MoSe 2 nanosheet array is designed and synthesized, in which MoSe 2 nanosheet through strong interfacial interaction is encapsulated in two dimensional carbon framework that improves electrical conductivity and Na + diffusion kinetic. Moreover, the carbon protective layer reinforces the stability of structure and maintains electrochemical activity during long-term charging/discharging process. The density functional theory calculation (DFT) further confirms carbon incorporation can reduce Na + diffusion energy barrier for enhancing the reaction kinetics. With the obtained NC/MoSe 2 @NC as free-standing electrodes for SIBs, it achieves a reversible capacity of 632 mAh g −1 at 0.2 A g −1 , or actual capacity of 421 mAh g −1 by removing contributed capacity of the carbon cloth substrate, and excellent long cycling stability. By matching with Na 3 V 2 (PO 4 ) 3 /C cathode, the sodium full cell displays a high energy density of 186.2 Wh kg −1 with a power density of 121.2 W kg −1 . This current design and fabrication strategy manifests promising prospect for exploring efficient electrode materials for sodium storage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Wenqian Liu,Yang Tang,Fan Liu,Li Gao,Daxiang Yang,Jingang Yang,Shu-Juan Bao
Trace precious metal modifying inexpensive transition metal catalyst is an effective method to optimize the activity, stability and cost of hydrogen evolution catalysts. In this feature work, self-supporting sandwich structured Co–Pt–Co/CC sheets were assembled on a carbon cloth (CC) by a simple electrodeposition/chemical displacement alternate growth method. Surprisingly, only 2.1 wt % Pt sandwich layer greatly improved the electrochemical activity of Co–Pt–Co/CC, which delivered a current density of 10 mA cm −2 at an overpotential as low as 46 mV. Importantly, its overpotential is almost 6 times lower than that of Co/CC, and is comparable to that of Pt–Co/CC. After well-tuning the sandwich layer, the optimized Co–Pt–Co/CC exhibited a higher current density and better long-term durability compared with Pt–Co/CC and Co/CC, which can be attributed to the unique tissue-structure and electronic structure optimization of the Co–Pt–Co/CC by the Pt sandwich layer.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shaoliang Huang,Kai Wen,Yancheng Liu,Congya Wu,Xiaomei Du,Chaobo Liang,Quanjin Ma,Yaqing Liu
Lightweight microwave absorbing structures have wide applications in aerospace and military equipment. In general, honeycomb sandwich structure is regarded as an ideal choice. However, traditional honeycomb sandwich structure designs have limitations in improving absorption bandwidth, and their impact resistance remains unremarkable. Herein, a novel microwave absorbing honeycomb sandwich structure (MAHSS) has been thoroughly investigated through both theoretical and experimental validations. The MAHSS is crafted using a glass fiber (GF)/epoxy composite that is coated with reduced graphene oxide (RGO) for enhanced performance. The middle honeycomb layer of MAHSS is arranged transversely to add more interface. When the honeycomb core has 2 layers and a wall thickness of 2.4 mm in MAHSS, the maximum achievable bandwidth is 13.6 GHz, while the minimum reflection loss (RL min ) reaches −24.02 dB under TE mode. The mechanical properties of the MAHSS were evaluated by compression test and drop weight impact testing. The MAHSS exhibits excellent compression and impact resistance, accompanied by self-recovery performance post-unloading. It still did not penetrate under an impact energy of 150 J, absorbing up to 123 J of energy. This work provides theoretical guidance and technical support for designing and preparing structural and functional integration microwave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Lingxia Zheng,Lingtong Guan,Jianlan Song,Huajun Zheng
The rational structure design of nanohybrids plays a vital role in the supercapacitor performance of electrode materials . Herein, a novel sandwiched structure based on Ni(OH) 2 and amino-functionalized graphene quantum dots (Ni(OH) 2 /af-GQDs) is prepared via a facile green strategy. The layered Ni(OH) 2 nanosheets are spaced by amino groups from af-GQDs to afford a sandwiched configuration with an enlarged pore diameter of 1.8 nm, which leads to the decrease of random aggregation of Ni(OH) 2 nanosheets and dramatically facilitates the ion transport, thus contributing to the increased surface area and improved electrochemical capacitance . Besides, the introduction of af-GQDs leads to enhanced electrical conductivity and better cycling stability as well as contributing additional electrochemical double-layer capacitance, resulting in an outstanding specific capacitance of 2653 F g −1 at 1 A g −1 . An asymmetric supercapacitor (ASC) based on Ni(OH) 2 /af-GQDs and electrochemical-exfoliated graphene (EG) is assembled, exhibiting a wide potential window range, a high energy density , and an excellent cycling stability with 90.15% capacitance retention. These results definitely demonstrate the great potential of Ni(OH) 2 -based hybrid materials in the development of high-performance supercapacitors .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 20
·11736-11748
·
IF 4.22
Gao Yuan,Zhou Xinghai,Zhang Maliang,Li Zhenhuan
In view of the disadvantages of concentration polarization and trade-off effects in the application of membrane in desalination field, oxide-nano graphene oxide/polyamide (O-NGO/PA) loose intermediate layer and PA ultra-thin dense layer were introduced to fabricate PA/O-NGO/polyphenylene sulfide composite membrane with sandwich structure via multi-step interfacial polymerization (MS-IP) method. The selective permeation mechanism of ultrathin layer produced by different aqueous monomers (PIP and MPD) was studied, the effect of its physicochemical structure on the relief of concentration polarization phenomenon and the breakthrough of trade-off effect was analyzed. The ultra-thin and dense PA layer mainly played the role of interception and shortened the water molecular penetration path. In the retention test of metal salt solution, compared with the rough surface, it was found that the smooth surface was more conducive to the diffusion of intercepted metal ions into the feed solution, thus alleviating the concentration polarization phenomenon. Graphical abstract
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
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Boyu Li,Qingmei Su,Lintao Yu,Shijia Dong,Miao Zhang,Shukai Ding,Gaohui Du,Bingshe Xu
Solid-state composite polymer electrolytes (CPEs) are promising for solving the safety problem of lithium metal batteries . However, the CPEs with comparable thickness (10 μm), improved ion conductivities and excellent mechanical strength are great challenges. In the present study, ultrathin (9.6 μm), flexible, mechanically strong, and sandwiched structure solid-state electrolytes (SSEs) are fabricated by a tape casting process, involving the 75 wt % LLTO/PVDF-CPE (LLTO-75) layer designed as intermediate layer sandwiched by two 15 wt % LLTO/PVDF-CPE (LLTO-15) layers. The LLTO-15 is a soft, stable layer on upper and lower sides that could create excellent interfacial contact with electrodes, and LLTO-75 possesses physical rigidity that could inhibit the Li dendrites growth. The balancing between the excellent interfacial contact of LLTO-15 and the inhibition of lithium dendrites growth of LLTO-75 gives sandwiched SSE a high ionic conductivity (4.7 × 10 -4 S cm -1 ) at room temperature, an excellent mechanical strength (7.2 MPa), and uniform Li plating/stripping. When coupled with LiFePO 4 and Li metal, the battery assembled with sandwiched SSE maintains 91.7% of its capacity and 99.7% of the Coulombic efficiency, after 1000 cycles. Our study suggests that the proposed sandwiched structure SSE is one of the alternatives for high performance solid-state LMBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Langming Bai,Junwen Ding,Haorui Wang,Nanqi Ren,Guibai Li,Heng Liang
To overcome the permeability-selectivity limitation and improve the performance of desalination membranes, novel methods and design strategies are needed to prepare new types of thin film composite (TFC) nanofiltration (NF) membranes. In this work, a modified TFC membrane with a sandwiched layer and a surface layer was fabricated through a facile additional two-step approach. The microfiltration (MF) substrate and TFC surface were modified by a cellulose nanocrystal (CNC) sandwiched layer and a polydopamine (PDA) layer, respectively. Scanning electron microscopy (SEM) analysis indicated that the support modified by CNCs presented a more homogeneous surface than the control TFC. Cross-sectional SEM images showed that the underneath MF support, CNC interlayer, polyamide layer and PDA deposition layer were perfectly integrated. The surface charge was determined by an electrophoretic analyzer and revealed that the CNC interlayer increased the membrane electronegativity, while the PDA layer presented the opposite effect. Compared to the control TFC membrane, the solute permeability and rejection of the resultant CNC-TFC-PDA membrane were simultaneously increased, indicating a breakthrough in the trade-off limitation. The modified membranes exhibited a high removal rate for Congo red, Rose Bengal, sodium lignosulfonate and alkaline lignin, suggesting their excellent rejection performance for textile dyes and lignin derivatives. Fouling tests indicated that both the interlayer and surface layer exhibited positive effects on fouling alleviation. The effects of each functional layer were explored, and the main factors for performance improvement, including the modified hydrophilicity, surface charge, pore size and surface roughness , were discussed.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）