COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Shuai Liu,Wenjie Tao,Yang Yu,Sandile Fakudze,Chen Wang,Jiaxin Wang,Jiangang Han,Jianqiang Chen
Aiming at enhancing cyclic stability and fast charging performance of lithium-ion batteries (LIBs), a sandwich structured composite with a buffer layer of porous silicon (Si) between the carbon layer and SnO 2 layer (C/Si@SnO 2 ) was developed by using ball milling. The results showed that the Si layer with plenty of mesoporous and cracks was coated successfully and the introduction of Si increased the disordered structure of SnO 2 , including the expansion of interlayer spacing, the emergence of Sn and SiOx indicated the reaction between Si and SnO 2 occurred during the ball milling process, while the generation of Si-O-Sn and Si-O-C bonds formed by Si integration connected the three components with intimate interfaces. Used as an anode for LIBs, the C/Si@SnO 2 electrode performed a favorable discharge capacity (919.21 mAh·g −1 at 0.1 A·g −1 ), the ultra-long cyclability after 1000 and 2000 cycles, impressive rate performance (269.87 mAh·g −1 at 5 A·g −1 ), and fast charging capability accompanying discharge capacity of 805.57 mAh·g −1 at 0.2 A·g −1 and charge capacity of 400.55 mAh·g −1 at 2 A·g −1 . In addition, the electrochemical impedance spectroscopy analysis showed that the graphitic carbon layer and porous Si layer improved the rapid Li + diffusion and transportation, which was beneficial to fast charging in LIBs. Our work provided a facile and green ball milling method to construct porous sandwich structured metal oxide/C composites with the introduction of Si, which can effectively increase the disordered structure of composite and also open up a new scheme of Si materials as an anode in the field of fast charging for LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Fucheng Liu,Yuhui Chen,Lei Zhuang,Hui Wang,Hulei Yu,Yanhui Chu
High-temperature materials with superior long-term oxidation resistance above 2000 °C are urgently sought for next-generation hypersonic vehicles. Here, (W 0.28 Ta 0.28 Mo 0.28 Cr 0.15 )(Al 0.2 Si 0.8 ) 2 -Al 2 O 3 dual-phase high-entropy alumino-silicides (HEAS-Al 2 O 3 ) are developed, which exhibit superior long-term oxidation resistance up to 2100 °C. To be specific, the as-fabricated HEAS-Al 2 O 3 samples are found to consistently follow an oxygen-diffusion parabolic law across 1700–2100 °C, possessing a high activation energy of 234.4 kJ mol −1 . Moreover, an ultralow oxidation depth of 0.4 mm after 120 min of laser oxidation and a linear plasma ablation rate of 0.026 μm s −1 at 2100 °C are achieved. Such remarkable oxidation resistance is mainly attributed to the increase in Al cations due to Al 2 O 3 incorporation, coupled with the inclusion of multiple cationic elements, to significantly enhance the rigidity of the glass network. Thereby, the viscosity and high-temperature stability of the resulting aluminosilicate glass are markedly improved, effectively protecting the underlying unoxidized HEAS-Al 2 O 3 . The as-developed HEAS-Al 2 O 3 shows great promise as a thermal structural candidate for next-generation hypersonic vehicles.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Zongdong Hao,Jiefeng Gong,Hong Yang,Rui Dou,Li Wang
In this work, a morphology-retained transformation of SiC whiskers into fibrous Si during reactive melt infiltration is reported for the first time. Silicon carbide (SiC) offers high specific strength and stiffness; however, conventional processing routes still face challenges in fabricating lightweight components with complex geometries. Vat photopolymerization (VPP) combined with reactive melt infiltration (RMI) provides an effective route for producing architected SiC-based composites, although the roles of residual-Si morphology and distribution in determining mechanical performance remain insufficiently understood. This work demonstrates that SiC whiskers undergo a morphology-retained interfacial transformation during reactive melt infiltration, which contributes to enhanced fracture toughness. In this work, a Si-morphology regulation strategy based on SiC whiskers, together with phenolic resin infiltration and pyrolysis (PRIP), was developed to improve the mechanical properties of Si/SiC composites fabricated by VPP and RMI. During RMI, SiC whiskers undergo localized interfacial dissolution in molten Si, and the original whisker-shaped channels are subsequently occupied by residual Si after infiltration and cooling, forming whisker-like residual-Si regions. Meanwhile, PRIP introduces additional carbon into the porous preforms, which reacts with molten Si to form additional fine SiC and reduces the amount and continuity of residual Si. These two microstructural regulation mechanisms jointly promote crack deflection, branching, and crack-path tortuosity, thereby enhancing fracture toughness. The fabricated Si/SiC composites achieved a maximum bulk density of 3.02 g/cm³ , a maximum flexural strength of 436.27 ± 9.57 MPa, and a maximum fracture toughness of 5.02 ± 0.06 MPa·m 1/2 . Compared with samples without Si-morphology regulation and PRIP treatment, the maximum flexural strength and fracture toughness increased by 31.70% and 36.78%, respectively. In addition, the composites containing 5 vol% SiC whiskers exhibited minimal anisotropic shrinkage during pyrolysis, with shrinkages of 0.81 ± 0.28%, 2.67 ± 0.25%, and 4.18 ± 0.38% in the X, Y, and Z directions, respectively, which is beneficial for high-precision near-net-shape fabrication. These results provide a practical route for manufacturing high-precision, complex-shaped Si/SiC composites with improved strength and toughness.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Yinli Liu,Hanye Cai,Lihua Yang,Xianghai Liao,Na Ling,Kai Chen
Lignin-enabled Si–O/carbon nanofibrous membranes were developed for harsh-condition oil/water separation. • Lignin contributed to defect-rich carbon framework formation and interfacial functionality. • The optimized membrane showed foldable flexibility, underwater superoleophobicity, and > 99% separation efficiency. Lignin, an abundant aromatic biological macromolecule, is an attractive sustainable precursor for functional carbon materials, yet its structure-directing role in high-performance separation membranes remains insufficiently exploited. In this work, lignin-enabled Si–O/carbon hybrid nanofibrous membranes were fabricated by electrospinning polyacrylonitrile/lignin/tetraethyl orthosilicate (PAN/lignin/TEOS) precursor solutions, followed by controlled stabilization and carbonization. During thermal conversion, lignin contributed to the formation of defect-rich carbon domains and polar interfacial characteristics, while TEOS-derived amorphous Si O phases helped regulate framework evolution, suppress structural collapse, and buffer local stress concentration. As a result, the optimized membrane developed a biomimetic brick-and-mortar-like hybrid architecture with multiscale porosity, foldable flexibility, rapid water infiltration, and strong underwater oil repellency. The membrane exhibited underwater oil contact angles above 150°, achieved separation efficiencies above 99% for surfactant-free oil/water mixtures with a water flux of 1299.36 L·m −2 ·h −1 under gravity-driven conditions, and also efficiently separated SDS-stabilized oil-in-water emulsions. Moreover, it maintained stable performance after repeated cycling, prolonged storage, and treatment under cold, hot, acidic, and alkaline conditions. This study highlights lignin not only as a sustainable carbon source, but also as a functional macromolecular component for constructing robust hybrid nanofibrous membranes for harsh-environment oil/water separation.
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Shuai Wu,Lanying He,Nan Wang,Wankun Li,Yimeng Sun,Lin Tao,Lixiang Li,Guangshen Jiang,Fang Di,Hongwei Zhao,Han Zhang,Chengguo Sun,Baigang An
The commercial application of Si-based lithium-ion batteries (LIBs) has been seriously constrained due to the performance degradation of the Si anode caused by the volumetric stress of Si (de)lithiation. To address this bottleneck, we have explored a novel polymer binder of CSP (Carboxymethyl cellulose-Sodium tetraborate-Poly(vinyl alcohol)) with high self-healing efficiency and elucidated the intrinsic mechanism underlying the improvement of its self-healing efficiency. By regulating the covalent-to-hydrogen bond ratio in CSP, the adsorption distance of physical and chemical bonds in the binder can be optimized, enabling the binder to achieve a self-healing efficiency of 91.1% and a balance between rigidity and flexibility, which is consistent with the results revealed by density functional theory (DFT) simulations. Consequently, the composition-optimized CSP226 binder maintains the structural integrity and cycling stability of the Si anode, achieving a reversible capacity of 1209.9 mAh g–1 at 1.0 A g–1 after 400 cycles and a high area capacity above 5.79 mAh cm–2 at a Si loading amount of 1.87 mg cm–2. A full cell with a Si anode and NCM811 cathode delivers 219.4 mAh g–1 with a 93.1% capacity retention after 100 cycles.
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 19
·4386-4394
·
IF 6.569
Xiangzhong Kong,Shi Luo,Liya Rong,Xuefang Xie,Shuang Zhou,Ziqiang Chen,Anqiang Pan
Due to its highest theoretical capacity and low discharge potential, silicon (Si) has attracted increasing attention as one of the most promising anodes for lithium-ion batteries. However, the practical application of Si-based materials is still hindered by rapid capacity fading caused by the huge volume changes of Si during cycling. Herein, a flexible carbon nanotube (CNT)-constructed carbonaceous fibers network anchored with N-doped carbon-coated Si nanoparticles (C/Si/CNTs) has been fabricated. CNTs were sequentially bound together to form a fibrous structure and further crosslinked into a network by electrospinning method. The rational designed conductive network improves the electron transport, buffers the volume changes of inner Si nanoparticles and exhibits excellent mechanical flexibility. Utilized as flexible anodes for lithium-ion batteries, the C/Si/CNTs electrode delivers a high reversible capacity of 696.8 mA h g−1 after 50 cycles at 100 mA g−1, and achieves 473.1 mA h g−1 at 500 mA g−1 (based on the total mass of the electrode). This approach provides a promising strategy to develop high performance silicon-based anode materials for next-generation lithium-ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-16
·
IF 4.011
An Fuqiang,Zhao Hongliang,Zhou Weinan,Ma Yonghong,Li Ping
Recently, high-energy density cells containing nickel-rich cathodes and silicon-based anodes have become a practical solution for increasing the driving range of electric vehicles. However, their long-term durability and storage performance is comparatively poor because of the unstable cathode-electrolyte-interphase (CEI) of the high-reactivity cathode and the continuous solid-electrolyte-interphase (SEI) growth. In this work, we study several electrolyte systems consisting of various additives, such as S-containing (1,3,2-dioxathiolane 2,2-dioxide (DTD), DTD + prop-1-ene-1,3-sultone (PES), methylene methanedisulfonate (MMDS)) and Si-containing (tris(trimethylsilyl) phosphate (TTSP) and tris(trimethylsilyl) borate (TMSB)) compounds, in comparison to the baseline electrolyte (BL = 1.0 M LiPF 6 + 3:5:2 w-w:w EC: EMC: DEC + 0.5 wt% lithium difluoro(oxalato)borate (LiDFOB) + 2 wt% lithium bis(fluorosulfonyl)imide (LiFSI) + 2 wt% fluoroethylene carbonate (FEC) + 1 wt% 1,3-propane sultone (PS)). Generally, electrolytes with Si-containing additives, particularly BL + 0.5% TTSP, show a lower impedance increase in the full cell, better beginning-of-life (BOL) performance, less reversible capacity loss through long-term cycles and better storage at elevated temperatures than do electrolytes with S-containing additives. On the contrary, electrolytes with S-containing additives exhibit the advantage of low SEI impedance but yield a worse performance in the full cell than do those with Si-containing additives. The difference between two types of additives is attributed to the distinct function of the electrodes, which is characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS), which was performed on full cells and half cells with fresh and harvested electrodes.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 31
·15016-15023
·
IF 3.925
Yayue He,Youjia Zhang,Zhenxi Li,Peng-Fei Cao,Huabin Yang,Shilun Gao
As a promising anode material for next-generation high-energy density lithium-ion batteries (LIBs), one of the main technical issues for silicon (Si) electrodes is the low initial Coulombic efficiency (ICE). By a pre-lithiation process, preparation of lithium–silicon (Li–Si) alloy electrodes can efficiently improve the ICE, thus leading to excellent electrochemical performance. Herein, with solid wastes as precursors, we report a cost-efficient approach for the fabrication of Li3.25Si anode materials via simple magnesiothermic reduction and then mechanical alloy reaction methods, combining the advantages of low-cost and high ICE. The prepared Li3.25Si@acetylene black (Li3.25Si@A) electrode exhibits excellent electrochemical performance with a high reversible capacity of 1138.9 mA h g−1 over 90 cycles at a current density of 100 mA g−1 and its ICE is as high as 107.7%, which is superior to that of the commercial Li3.25Si@A electrode. With a simple and low-cost manufacturing process and high ICE, the fabrication process will be definitely meaningful in achieving low-cost and high-capacity anode materials with a prolonged cycle life.
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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可持续材料
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电池技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.7
Chunlin Chi,Fan Liu,Shuai Jiang,Taoliang Zhou,Dawei Chen,Yujue Wang,Bin He,Qian Zhao
Interfacial engineering is a decisive factor in stabilizing layered oxide cathodes for sodium-ion batteries (SIBs). Here, a synergistic Li/Mg/Si tri-doping strategy is introduced to simultaneously modulate the bulk lattice and interfacial chemistry of a P2-type Na 0.7 Li 0.03 Mg 0.05 Ni 0.25 Mn 0. 6 Si 0.07 O 2 (LMNMS) cathode. The dopants expand the c-axis lattice (11.195 Å) and strengthen surface transition metal (TM)-O covalency, yielding improved Na + diffusion kinetics and interfacial stability. X-ray photoelectron spectroscopy (XPS) and in situ Raman analyses reveal reduced surface oxygen vacancies (15% vs. 22% in the undoped sample) and suppressed electrolyte-induced oxygen redox, effectively mitigating the P2 → O2 phase transition. Electrochemical impedance spectroscopy confirms a 45% decrease in charge-transfer resistance, indicating enhanced interfacial charge transport. Benefiting from this coupled bulk-surface optimization, LMNMS delivers a high reversible capacity of 165 ± 3.2 mAh g −1 at 0.1C, an excellent rate performance (92 ± 2.5 mAh g −1 at 5C), and 90.5 ± 1.8% capacity retention after 200 cycles. This work highlights how multi-site doping tailors both the electronic and chemical nature of electrode interfaces, offering a design paradigm for high-performance and interface-stable sodium-ion batteries.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Jicui Dai,Yichao Dong,Cong Yu,Yaxin Liu,Xiangguo Teng
A novel N115-g-PSBMA membrane containing zwitterionic groups was successfully prepared by grafting the zwitterionic SBMA (sulfobetaine methacrylate) onto Nafion 115 (N115) via SI-ATRP (surface-initiated atom transfer radical polymerization) technique. The N115-g-PSBMA membrane has shown higher hydrophilicity , lower vanadium permeability, higher coulombic efficiency and energy efficiency than that of commercial N115 membrane for VRB (vanadium redox flow battery) application. At the current density of 40–80 mA cm −2 , the average energy efficiency of the VRB with N115-g-PSBMA membrane has reached up to 87.3%, which is 2.6% higher than that of the VRB with N115 membrane at the same current densities. The method is expected to present a new direction to prepare novel separators with both excellent performances and low cost for VRB application.
研究领域:
能源材料
·
高分子科学
·
电化学储能
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DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Zefeng Fu,Feixiang Bian,Junkai Ma,Wenkui Zhang,Yongping Gan,Yang Xia,Jun Zhang,Xinping He,Hui Huang
Silicon is considered as an ideal anode material for the next generation of lithium-ion batteries (LIBs) owing to its high specific capacity, low lithiation potential, and high natural abundance. However, its potential application is greatly restricted by poor electrical conductivity and large volume expansion during lithiation/delithiation processes. Herein, a novel solid-state reaction route is developed to synthesize a silicon/carbon nanotubes/carbon (Si/CNTs/C) composite by directly reacting magnesium silicide (Mg2Si) with lithium carbonate (Li2CO3). This method realizes synchronous formation of Si, CNTs, and amorphous carbon with a good interfacial configuration. Transmission electron microscopy (TEM) reveals that MgO may be responsible for the in situ growth of CNTs during the chemical reaction process. The crystalline Si particles are encapsulated by CNTs and the amorphous carbon matrix, which not only accommodates the volume expansion of Si but also enhances the integral electronic conductivity. Consequently, the Si/CNTs/C composite exhibits a high reversible capacity (702 mA h g–1 at 0.2 A g–1), excellent rate performance (420 mA h g–1 at 5 A g–1), and long cycling life (over 1500 cycles) when used as an anode for LIBs. Notably, this research might provide a new strategy for large-scale synthesis and utilization of Si/C composites in high-performance LIBs.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
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2026
·
IF 4
Zhihao Zhu,Bingtao Wang,Siqi Huo,Zhenghong Guo,Jinjun Tang,Juan Li
Developing flame-retardant epoxy resin (EP) with high performance has drawn extensive attention recently due to the growing public concern for fire safety. However, the simultaneous enhancement of flame retardancy and toughness without the sacrifice of mechanical strength and thermal stability is still a challenge for EP. Herein, a novel kind of imidazole-based reactive flame retardant MD containing P/N/Si was synthesized and applied into EP. The results demonstrated that due to the presence of P/N/Si multiple flame-retardant elements, incorporating 4 wt% MD could make EP/MD pass UL-94 V-0 grade and have a limiting oxygen index (LOI) of 29.7%. Meanwhile, compared with pure EP, the peak heat release rate (PHRR), total heat release rate (THR), peak smoke production rate (PSPR), and total smoke production (TSP) of EP composite containing 4 wt% MD exhibited an obvious reduction of 41.5%, 11.4%, 24.2%, and 12.9%, respectively. Moreover, thanks to the high reactivity of imidazole groups, the MD could participate in the cross-linking reactions of EP and form strong interfacial interaction between the matrix and flame retardant. Therefore, the mechanical strength and toughness as well as the glass transition temperature of EP/MD composites could be simultaneously and greatly enhanced (tensile strength +30%, flexural strength +35%, impact strength +22%, and T g + 7°C). This work provided a feasible methodology for the fabrication of highly efficient flame-retardant EP with prominent mechanical and thermal properties. Highlights A reactive flame-retardant MD containing DOPO groups, imidazole moieties, and siloxane segments was synthesized in mild conditions. MD endowed EP with satisfying flame-retardant and smoke suppression properties. EP/MD composites realized simultaneous improvement of fire safety, mechanical strength, and glass-transition temperature in a small amount of MD.
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DOI
高影响因子
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