NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Jie Huang,Yanlin Zhang,Junhong Lu,Haoyang Jiang,Ben Liang,Benyuan Wang,Dafang He,Haiqun Chen
Recently, silicon-based anode materials have garnered significant attention from researchers due to their high theoretical specific capacity. However, these materials are highly prone to volume expansion, which significantly hinders their further commercialization. Here, the skeleton of silicon nanoparticles (Si NPs) is constructed from metal–organic frameworks (MOFs) in order to buffer their volume increase and enhance electrochemical performance. In this study, a solvent-thermal reaction is conducted using a mixture of NiFe-MIL and sodium hydroxide solution to deposit a carbon layer around the Si NPs, while simultaneously creating a highly conductive graphene network. Si materials supported by inward multi-channel carbon were synthesized through high-temperature pyrolysis. This unique double-layer carbon structure endows the material with remarkable electrochemical properties, including enhanced cycle stability and lithium storage capacity. The Si@C–NiFe-MIL@reduced graphene oxide (Si@C–NiFe-MIL@rGO) electrode materials exhibit a high specific capacity of 2092.8 mA h g−1 at a current density of 50 mA g−1. Furthermore, they demonstrate a stable reversible capacity of 851 mA h g−1 after 200 cycles at a current density of 1000 mA g−1. This research may provide a different strategy for producing high-energy, reasonably priced silicon anodes for lithium-ion batteries (LIBs).
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
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Lin-Xuan Fang,Yun-Gang Feng,Li Li,Guan-Wu Yin,Hualan Wang,Zheng Xu,Li-Wen Xu
Two silicon-containing eugenol-based benzocyclobutene monomers were prepared by a simple solvent-free hydrosilylation reaction. After heat treatment, a series of materials were obtained by a free radical addition reaction, [4 + 4] cycloaddition, or [4 + 2] Diels–Alder cycloaddition. All polymers displayed high thermostability with a 5% weight loss temperature (T5d) of over 410 °C and a glass transition temperature (Tg) of up to 216 °C as well as a good transmittance of 90% varying from 500 to 800 nm. In particular, all polymers also exhibited good hydrophobicity with contact angles exceeding 100° and water absorption as low as 8‰ after immersing in boiling water for 72 h. It should be noted that P3 showed excellent dielectric properties with a dielectric constant (Dk) of 2.48 and a dielectric loss (Df) of 6.38 × 10–3 at a high frequency of 2 GHz as well as good flame retardancy due to the high content of cyclotriphophazene compared with those of P1, P2, and previously reported biobased materials. The above advantages indicate that eugenol-based low-dielectric materials have great potential for application in encapsulation resins in the field of microelectronics.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Zongzhe Liu,Shaobo Ma,Xue Mu,Renlong Li,Geping Yin,Pengjian Zuo
A silicon anode with ultra-high specific capacity has motivated tremendous exploration for high-energy-density lithium ion batteries while it still faces serious issues of irreversible lithium loss, unstable electrode electrolyte interface (SEI), and huge volume expansion. Prelithiation is a crucial technology to alleviate the harm of active lithium loss of silicon-based full-cell systems. Herein, we reported a cathode prelithiation method using Li2S-PAN as a lithium “donor”, which was synthesized via chemical reaction between sulfurized polyacrylonitrile and Li-biphenyl complex. The Li2S-PAN with an initial charging capacity of 668 mAh g–1 (2.5–4.0 V) is loaded on the LiFePO4 electrode, and the LiFePO4/Li2S-PAN composite electrode displays a high initial charge capacity of 206 mAh g–1, which is 22.3% higher than the pristine LiFePO4. With a silicon/graphite/carbon (Si/G/C) composite anode, the Si/G/C||LiFePO4/Li2S-PAN full cell exhibits a reversible capacity of 123 and 107 mAh g–1 in the 1st and 10th cycle, which is 15.5 and 24.5% higher than the Si/G/C||LiFePO4 battery, respectively. The SEI layer of the silicon anode in the Si/G/C||LiFePO4/Li2S-PAN cell contains abundant conductive LiF species, which can enhance the interfacial stability and reaction kinetics of the cells. The proposed cathode prelithiation process is compatible with the industrial roll-to-roll electrode preparation process, exhibiting a promising application prospect.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR RESEARCH
·
2017
·Vol. 25
·期 12
·1153-1157
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IF 1.405
Li Yanyan,Yin Mingying,Yan Ying,Wang Ce,Liu Xincai,Chao Danming
Electrochromic materials have attracted much attention due to their potential in intelligent applications. We report here the preparation of a crosslinked electrochromic polyurea containing oligoanilines and silicon groups (PUOSi), which shows good thermostability and interesting spectral properties. The crosslinked network structure (c-PUOSi) could be accomplished easily by virtue of hydrolysis reaction. The reversible electrochemical activity and improved electrochromic behavior have been disclosed through multiple electrochemical techniques coupled with UV-Vis spectroscopy. The stability of c-PUOSi film in the electrochemical switching measurements has been effectively enhanced through the crosslinking reaction of triethoxysilane end groups, whilst the resulting densified electroactive film shows low response speed during the electrochemical process. Our demonstrated system presents a deep understanding of structure-function relationship, which is a vital implication for the fabrication and application of the electrochromic devices.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Catalysts
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2023
·Vol. 13
·期 7
·1116
·
IF 3.9
Chaokun Yang,Xiangning Ma,Meng Li,Tuantuan Yang,Xin Zhao
Much effort has been devoted to the development of efficient heterogeneous catalysts for the conversion of carbon dioxide (CO2) into high-value chemicals. Generally, the cycloaddition of CO2to epoxides is considered a green and atom-economic reaction for the production of cyclic carbonates. Based on this, three kinds of silicon-based catalysts modified using zinc(Ⅱ) 2-bromoacetic (Si-ZnBA-n, n = 1, 2, 3) were facilely synthesized and employed for the chemical fixation of CO2to epoxides with the use of potassium iodide (KI). A series of characterization techniques were used to characterize the textual structures and physicochemical properties of Si-ZnBA-n. The synergistic effects of Zn, –NH2,–OH and the nucleophilic group guaranteed the catalytic activity of Si-ZnBA-n. Si-ZnBA-1 exhibited the best catalytic activity among Si-ZnBA-n because Si-ZnBA-1 possessed the highest Zn content. Additionally, the effects of the reaction conditions (temperature, pressure, time and catalyst loadings) were also discussed. The propylene carbonate (PC) yield could reach 97% under 130 °C, 2 MPa, for 5 h without the employment of organic solvent, and its selectivity was 99%. In addition, the recycling property of Si-ZnBA-1/KI was also investigated, and the catalytic system exhibited good cycle performance. Meanwhile, the catalyst showed outstanding versatility for CO2application to various epoxides, and a possibly synergistic reaction mechanism was proposed. Finally, a dynamic model was developed to discuss the activation energy of the CO2cycloaddition reaction over the Si-ZnBA-1 catalyst.Keywords:CO2;cyclic carbonate;epoxides;silicon-based;KI
研究领域:
化学工程
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催化科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Yangchenyi Wu,Shanyu Wang,Yang Wu,Fuzhong Wu,Jie Tang
Silicon (Si) is living with severe pulverization of active materials, continuous breakage of structure in electrode, and turbulent solid electrolyte interphase (SEI) because of huge volume variation during (dis)charging. Herein, from the view of the active material and electrode structure, the innovative dual modification that combines carbon coating and Ti 3 C 2 T x as conductive agents is adopted, generating more than simply pooling their efforts together. The resultant Si@C-M electrodes exhibit an excellent rate capacity of 1538.1 mA h g −1 at 5 A g −1 and maintain capacity retention of 80.5 % with 1084.8 mA h g −1 after 300 cycles at 1 A g −1 . The sterling performance is thanks to the stable electrode provided by the coating-carbon and Ti 3 C 2 T x which not only reduces interface impedance, and enhances Li-ion diffusion, but suppresses the volume variation of electrodes as well effectively as verified by in situ and ex situ characterization. Moreover, utilizing the Ti 3 C 2 T x as the conductive agent is beneficial to forming benign SEI rich in LiF and Li 2 O. This work provides a potential strategy and exploits new routes for the practical utilization of high-energy-density lithium-ion batteries (LiBs).
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
RHEOLOGICA ACTA
·
2024
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IF 2.3
Sun Li,Wang Geng,Zhang Chunwei,Liang Tianqi
We have found that the unique particle properties of fly ash can be applied to the modification of shear thickening fluid. In this paper, rheological properties and microscopic thickening mechanism of fly ash/silicon-based shear thickening fluid (subsequently abbreviated as FA/SiO 2 -STF) are studied. Ultrasonic technology and mechanical stirring method were used to prepare FA/SiO 2 -STF with different mass fractions of fly ash, and then rheometer was used to carry out steady-state rheological testing for FA/SiO 2 -STF, and 4%FA/SiO 2 -STF dynamic rheological test and temperature sensitivity testing, respectively. The thickening mechanism of FA/SiO 2 -STF was analyzed by scanning electron microscope. The rheological test results show that the FA/SiO 2 -STF with 4% fly ash content exhibits remarkable shear thickening effect. Finally, the relationship between the viscosity and shear rate of FA/SiO 2 -STF is numerically described by a mathematical model, which can accurately reflect the viscosity thickening effect.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2024
·
IF 4.3
Biao Yan,Zhixin Zhao,Xiaojuan Wu,Haoran Li,Duo Liu
Diamond shows great potentials as an ultimate material candidate for application in microelectromechanical systems (MEMS). In this work, we report microcontact printing (μCP) transfer as a facile technique to fabricate diamond MEMS cantilever arrays. We started from the Deryaguin–Landau–Verwey–Overbeek (DLVO) principles and formulated a colloidal “ink” that contains nanodiamonds (NDs) seeds well dispersed in polymethyl methacrylate/acetone. The NDs seeds were then transfer printed onto a silicon (100) substrate by using a flexible polydimethylsiloxane (PDMS) stamp with predefined pattern. The densely packed NDs pattern (∼10 9 cm −2 ) enables facile and selected-area growth of diamond with microwave plasma chemical vapor deposition (MPCVD) technique. A diamond film with minimal graphite contaminants and low residual stresses was obtained after growth at 1118 K for 3 h. The diamond cantilevers were released from the substrate by wet chemical etching using KOH (40 % wt.) and isopropyl alcohol (10 % vol.). An examination of the vibrational kinetics indicates that the diamond film has a high Young's modulus (∼795 GPa) and the cantilevers exhibit consistently distributed resonant frequencies and high quality factors in ambient air. The method opens the door for large-scale, cost-effective production of uniform diamond MEMS devices for sensor and quantum applications.
研究领域:
材料科学
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微机电系统
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表面化学
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产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Liu Lang,Zhang Qian,Han Guangrui,Zhang Mengjie,Song Xinyu,Xiao Hong,Hou Linrui,Jiang Ruiyu,Yuan Changzhou
Si, as the most promising anode with high theoretical capacity for next-generation lithium-ion batteries (LIBs), is hampered in commercial application by its poor electrical conductivity and significant volume expansion. Herein, the core-shell Si@SiO x /C@C-Ar (SSC-A) or Si@SiO x /C@C-H 2 /Ar (SSC-H) composites are purposefully designed by in situ introduction of inorganic SiO x in pure Ar or H 2 /Ar atmosphere to realize a Si-based anode for LIBs. By introducing different atmospheres, the valence states of SiO x are regulated. The inorganic transition layer formed by the combination of SiO x with higher average valence and asphalt-derived carbon demonstrates better performance in both stabilizing the core-shell structure and inhibiting the agglomeration of Si particles. Given these advantages, the SSC-A electrode exhibits excellent electrochemical performance (1163 mAh g −1 after 400 cycles at 1 A g −1 ), and the commercial blended graphite-SSC-A electrode reaches a specific capacity of 442 mAh g −1 with 74.8% capacity retention under the same conditions. Even the SSC-A electrode without Super P maintains an ultrahigh discharge specific capacity of 803 mAh g −1 with 60.6% after cycling. Importantly, the full batteries based on SSC-A without Super P achieve a discharge specific capacity of 126 mAh g −1 with 28.2% capacity decay after 200 cycles, demonstrating the superior commercial application potential.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2024
·
IF 8.6
Xiaowei An,Jiannan Cheng,Qi Li,Jiyun Tang,Zongkui Li,Liwei Liu,Hui Yang,Chunyang Wei
Silicone-based fouling release coatings (FRCs) have shown great promise as an environmentally friendly antifouling technology, while inferior mechanical properties and insufficient substrate adhesion have hindered their further application. We focused on enhancing the mechanical robustness of silicone-based coating through the synergistic effects of hydrogen bonding , π-π aromatic interaction and covalent bonding. The resulting silicone-based coating displayed a low surface energy of 23 mJ/m 2 and improved mechanical strength and substrate adhesion, offering values up to 6.4 MPa (9.1 times higher) and 2.87 MPa (25.7 times higher), respectively. Additionally, the modified coating demonstrated a tear strength of 9.8 kN/m and mass loss only about 30 mg after enduring 10,000 wear cycles. Alkoxysilane-functionalized polyethylene glycol and quaternary ammonium salt were grafted into the cross-linking structure to make them anchored to the networks and migrated to the surface layer in seawater without releasing. The coating provided 99.1% antibacterial efficiency and effective antidiatom performance (≤ 11.2 cell/mm 2 ). After a 12-month marine field test , the developed film showed only 20% micro bio-fouling compared to 100% fouling coverage on the PDMS surface. By combining improved mechanical properties with antifouling characteristics, this new multifunctional silicone-based FRC exhibits tremendous potential for sustainable marine antifouling coating application .
研究领域:
材料科学
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海洋生物学
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
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2024
·
IF 2.3
Xu Feifei,Dong Xin,Jia Qian,Chen Ruoyu
Mechanical strength is an important factor that affects and limits the life of surface antireflective (ARC) coatings such as optical lenses, photovoltaic panels, and liquid crystal displays. In this work, a network-structured silica sol was prepared using tetraethyl orthosilicate (TEOS) and methyltriethoxysilane as silicon sources. Triethoxy(1H,1H,2H,2H-nonafluorohexyl)silane (C 4 FTES) was used to modify the acid-catalyzed silica sol. Finally, the mixed sol was plated on the surface of polymethyl methacrylate by impregnation-pulling method. The coating obtained after drying at 100°C showed a maximum transmittance of 97.98% in the visible wavelength range (400–800 nm). The coating still maintained good optical properties after undergoing various wear-resistant tests such as sandpaper abrasion and cotton ball friction. Moreover, the pencil hardness test of the coating improved from 5B to 3H after it was modified by short-chain perfluoroalkyl groups (C 4 FTES). This work required only low-temperature treatment without calcination to prepare a silicon-based ARC coating formed by copolymerization of C 4 FTES and TEOS, and the mechanical properties of the coating meet actual needs. This easy-to-operate preparation method greatly expands the application scope of silicon-based ARC coatings in the field of heat-sensitive materials. Graphical abstract The polymethyl methacrylate (PMMA) substrate is coated with a fluorine-containing coating with a network structure, which greatly improves the transmittance and surface hardness of the substrate.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Dong Tian,Kaiming Zhang,Lixin Sun,Zhihao Rong,Dejin Zhang,Lei Liu,Yahui Wu,Chuanhui Gao,Ze Kan,Yuetao Liu
The development of silicone-based superhydrophobic coatings is highly desirable for antifouling applications. However, achieving durable coatings remains challenging. Superhydrophobicity is often lost after mechanical damage or microorganism penetration, which compromises the static antifouling ability. Herein, we propose a straightforward strategy for fabricating a silicone coating (F-PIBO-40 %) based on a simple condensation reaction between a novel silane telomer (F-PIBO) and α,ω-dihydroxypolydimethylsiloxane (PDMS). Moreover, nano-sized silica particles (SiO 2 ) were uniformly incorporated to construct micro-nano rough structures and enhance the durability. The mechanical and environmental durability, self-cleaning, antibacterial and anti-diatom performance were comprehensively characterized. The results revealed that even after 400 damage cycles (8000 cm of wear), the contact angle remained above 165°. The superhydrophobic surface could be simply renewed through friction, minimizing the cost of use and replacement. Furthermore, the coating retained its superhydrophobic properties after exposure to UV radiation, hot/cold temperature cycling, and immersion in various polar and non-polar solvents. The synergistic effects of the isobornyl groups and the superhydrophobicity contributed to the excellent self-cleaning, antibacterial, and anti-diatom performance. We believe that this work provides a new approach for the preparation of multi-environmentally reliable, durable, and surface-renewable superhydrophobic antifouling coatings.
研究领域:
材料科学
·
生物学
✓ 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）