JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Erqing Zhao,Jiaming Li,Yudi Guo
Nasicon-type Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) is a potential electrolyte for lithium-ion batteries due to its appropriate conductivity and good air stability. Herein, LATP was co-doped with Ga and Si to improve its ionic conductivity. The Li 1.325 Al 0.29 Ga 0.01 Ti 1.7 Si 0.025 P 2.975 O 12 (LAGTSP025) electrolyte exhibits an ionic conductivity of 8.92 × 10 −4 S/cm at 30 °C, which is mainly ascribed to its enlarged crystal lattice and high densification. This electrolyte material was incorporated into poly(ethylene oxide) (PEO) polymer to form a polymer-based PEO-LITFSI-LAGTSP025 solid composite electrolyte (SCE). The optimized SCE shows a high ionic conductivity of 5.33 × 10 −4 S/cm and excellent interfacial stability at 60 °C. Consequently, a Li/SCE/Li symmetric battery can stably cycle for 1600 cycles at a current density of 0.1 mA/cm 2 . Moreover, an LFP/SCE/Li all-solid-state lithium-ion battery (ASSLIB) maintains a discharge capacity of 143.56 mAh/g and exhibits 95.21% capacity retention after 300 cycles at 0.5C. This work demonstrates PEO-LITFSI-7.5LAGTSP025 SCE is a potential solid electrolyte for ASSLIBs.
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高影响因子
Coatings
·
2026
·Vol. 16
·期 3
·277
·
IF 3.4
Guanghua Li,Maolin Chang,Liyong Wang
HighlightsUtilizing photovoltaic diamond wire saw cutting silicon kerf waste as raw material to achieve a high-value resource recycling, offering both environmental benefits and low-cost advantages.Through a simple ball-milling and sol-gel method, a core–shell composite structure featuring “carbon shell coating + graphite two-dimensional conductive network” (FVW-Si/G500@C) was designed and constructed, effectively addressing the two critical challenges of silicon volume expansion and poor electrical conductivity.The as-prepared anode material delivered a high reversible capacity of 951.8 mAh g−1after 100 cycles at 0.2 A g−1, and retained a capacity of 230.4 mAh g−1even at a high current density of 1 A g−1, demonstrating significantly enhanced rate capability and cycling stability.What are the main findings?Photovoltaic waste silicon powder features high purity, high tap density, and low specific surface area, enabling direct use as high-capacity anode precursor after simple purification.Optimized ball-milling speed (500 rpm) uniformly anchors silicon particles on graphite flake surfaces, inhibiting agglomeration and constructing a continuous two-dimensional conductive network that enhances electron transport efficiency.RF resin-derived carbon shell provides complete coating, effectively buffering silicon volume expansion and suppressing excessive SEI film growth, substantially improving cycle life and initial Coulombic efficiency.Synergistic effect between graphite conductive network and carbon shell mechanical constraint endows the composite with high capacity, high-rate capability, and long-term cycling stability.What are the implications of the main findings?Provides a feasible pathway for high-value utilization of photovoltaic silicon waste: Industrial waste can be directly converted into high-performance anode materials without complex purification or nanofabrication.Proposes a low-cost, scalable strategy for preparing silicon–carbon anodes: Conventional ball milling and RF resin coating replace high-cost processes such as CVD and template etching, lowering production barriers and advancing commercialization.Deepens understanding of structural design principles for silicon–carbon composites: Reveals the synergistic mechanism of the “two-dimensional conductive network + elastic carbon shell” dual-constraint structure, offering insights for rational design of high-performance silicon-based anodes.Aligns with green manufacturing and sustainable development: Reduces photovoltaic solid waste at the source while providing low-environmental-footprint raw materials for lithium-ion batteries, delivering both ecological and economic benefits.The photovoltaic industry generates a substantial amount of high-purity waste silicon powder during the diamond-wire saw cutting process, which can serve as an environmentally friendly and cost-effective resource for lithium-ion battery recycling. However, its commercial application is hindered by the surface attachment of silicon dioxide, organic substances, metal impurities, as well as its intrinsic drawbacks such as significant volume expansion (>300%) during lithium (de)intercalation and low electronic conductivity. To address these issues, this study first purifies the waste silicon powder and then designs the structure of the composites. Using a simple ball-milling combined with sol-gel method, a core-shell composite material with a carbon-coated two-dimensional conductive network (FVW-Si/G500@C) was synthesized. The two-dimensional conductive network provides sufficient space to accommodate the volume expansion of silicon, while the mesoporous structure on the carbon shell offers a fast transport pathway for Li+, thereby enhancing the electrode kinetics. The prepared FVW-Si/G500@C electrode maintained a high reversible capacity of 951.8 mAh g−1after 100 cycles at a current density of 0.2 A g−1. Even at a high current density of 1 A g−1, it retained a reversible capacity of 230.4 mAh g−1. The results indicated that the synergistic effect between graphite sheets and the mesoporous carbon shell significantly improved the rate performance and cycling stability of the FVW-Si/G500@C electrode. This study provided a theoretical foundation for the scalable, green, and high-value utilization of waste silicon powder in the photovoltaic industry and offered technical support for sustainable energy development.
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高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Hanlin Xuan,Chuanghui Zhang,Haoran An,Pengfei Yin,Wen Luo
Applying hard carbon nano-template (HCN) on micron silicon is a potential strategy to exploit next-generation lithium-ion battery (LIB) anodes. However, achieving a balance in performance and stability under high stress during cycling is still a huge challenge. Herein, we developed an in - situ gradient assembly strategy to obtain three kinds of N,Co co-doped thin-layered HCN (THCN N,Co ) on the surface of honeycomb-like micron porous silicon (HMPSi) by regulating the thin-layer thickness, pore structure and specific chemical bonds. The results show that the relatively thin-layered HCN (RTHCN N,Co ) with enhanced Pyrrolic N Co bonds can effectively adjust the high stress, optimize the ion transport paths and improve the electrochemical activity of HMPSi, resulting in excellent cycling stability at large current density. Specially, the HMPSi@RTHCN N,Co anode displayed a high reversible capacity of 883.5 mAh g −1 after 600 cycles at 1 A g −1 and 446.2 mAh g −1 after 1000 cycles at 3 A g −1 . Moreover, the full cell using HMPSi@RTHCN N,Co anode and LiFePO 4 cathode exhibited a high capacity retention of 92.8% after 100 cycles. Our work provides a valuable surface nano-engineering strategy to regulate the structural stability and electrochemical activity of micron Si anode for long-term stable LIB application.
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高影响因子
POLYMER COMPOSITES
·
2023
·
IF 5.2
Yi Li,Ning Zhang,Jicai Liang,Kaifeng Yu,Zengxia Zhao,Ce Liang
Composites with good thermomechanical and UV-shielding properties are essential in fiber-reinforced composites. This paper focuses on composites' ultraviolet (UV) shielding efficiency with added Ce-Zr-Si oxide nanoparticles/epoxy resin. The Ce-Zr oxide nanoparticles were first functionalized with a silicon coupling agent and ethyl silicate to improve their dispersion and surface activity. In this work, we prepared epoxy nanocomposites with the addition of Ce-Zr -Si oxides(1,3,5,7 wt%) and found that the materials had good enhancement of the UV shielding properties of the epoxy resin matrix. Meanwhile, it was used in basalt fiber (BF)/epoxy composites prepared by the hot-pressing method, and surface treatment of basalt fibers was carried out. The results showed that the modified fiber composites could effectively enhance the thermomechanical properties of epoxy resin composites. It is noteworthy that the tensile strength and flexural strength of the hybrid composites reached their peak when 5 wt% Ce-Zr-Si was added, increasing by 13.8% and 33.67% respectively. The modified (BF)/epoxy composites exhibited improved thermal stability compared to pure epoxy resin, with the maximum weight loss temperature of BF-1/EP reaching 349°C. The T(UVA) decreased to 2.41%, while the T(UVB) decreased to 0.053%, and almost all the ultraviolet irradiation was blocked. These results show that our prepared composites have good thermomechanical and UV shielding properties. Highlights Ce-Zr oxide nanoparticles were functionalized with a silicon coupling agent. Ce-Zr-Si oxide was added to enhance the ultraviolet shielding efficiency. Modified BFs were composited to improve thermomechanical properties.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Jia-Man Liang,Fang Zhang,Yu-Lin Zhu,Xiao-Yan Deng,Xian-Ping Chen,Qiu-Ju Zhou,Ke-Jun Tan
Here, the high fluorescent silicon-doped carbon quantum dots (Si-CQDs) were prepared by a facile and one-pot hydrothermal assay using 3-aminopropyltrimethoxysilane as the carbon and silicon source. The prepared Si-CQDs exhibit favorable water-soluble, high-temperature resistance, acid resistance, alkali resistance, high ionic strength resistance, high photostability, film-forming ability and solid-state fluorescence. Compared to other Si-CQDs that have been reported, the prepared Si-CQDs show unique up-conversion fluorescence. Furthermore, it is found that berberine hydrochloride (BH) can effectively quench the down- and up-conversion fluorescence of the Si-CQDs, making it can be used as a highly sensitive and specific probe for BH dual-mode sensing. Meanwhile, the linear range of down-conversion fluorescence detection for BH is 0.5-30.0 µmol/L with a limit of detection (LOD) of 50 nmol/L, and the linear range of up-conversion fluorescence assay for BH is 0-25.0 µmol/L. The mechanism of down-conversion fluorescence quenching by BH was investigated through a series of studies. The results show the quenching mechanism is the inner filter effect (IFE). Moreover, this proposed strategy has been well used to analyze BH in urine samples with satisfactory results.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yi Zhai,Xubin Zhang,Fumin Wang,Guojun Lv,Tao Jiang,Yuzhou Wu,Mengyue Li,Mengyao Li,Qing Zhang,Yongkui Liu
Development of economic strategy to synthesize hollow zeolite with widely tunable Si/Al ratios providing variable acidity is of great significance in industry. Here, a one-step and low-cost strategy without mesoporogen was successfully developed to synthesize single-crystal hollow ZSM-5 containing mesopores/macropores, with variable Si/Al ratios of about 14–∞ and 114–∞ at critical TPA+/SiO2 ratios of 0.05–0.1 and 0.05, respectively. This is the first time the usage of a large amount of TPAOH was avoided while breaking the traditional limitation of Si/Al ratio (25–50). The component of synthesis system and crystallization temperature acting as the vital roles in hollow structure has been confirmed by a series of characterization. Moreover, according to the investigation of the evolution process, a novel racing crystallization mechanism based on the competition relationship between surface crystallization and the internal dissolution rate was proposed for the first time. The racing crystallization mechanism and internal nonprotective aluminum become the crucial factors for synthesis. The prepared hollow ZSM-5 zeolites exhibit superior catalytic performance in the different acidity-catalyzed condensation involving large molecules between benzaldehyde and n-butyl alcohol as well as 2-hydroxyacetophenone, which is mainly attributed to the property acidity, more accessible active Al sites on the surface, and shorter diffusion path. By calculating, the effectiveness factor (η) of hollow zeolite is close to 1, further confirming its better mass transfer ability. The strategy has also been successfully extended to the synthesis of high-amount Fe-doped, Ga-doped, and B-doped hollow silicate-1.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 34
·11999-12005
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IF 4.39
Huanhuan Cheng,Abudukadi Tudi,Peng Wang,Kewang Zhang,Zhihua Yang,Shilie Pan
A new ternary Ba-based selenide, Ba3SiSe5, was synthesized by a high-temperature solid-state method. It crystallizes in the centrosymmetric space group Pnma (no. 62) of the orthorhombic system. The structure of the title compound consists of unique Se(4)Ba layers and discrete SiSe4 tetrahedra. The structure and computational properties of Ba3SiSe5 are systematically studied together with those of the Ba–MIV–Q (MIV = Si, Ge; Q = S, Se) system, and show an interesting difference in dimensions formed by one of the crystallographic Ba atoms and MIVQ4 tetrahedra, as well as optical property transformations modulated by MIV atoms. First principles methods were employed to obtain a better understanding of the relationship between structures and properties. Ba3SiSe5 maintains a moderate birefringence of 0.044@1064 nm and the real space atom cutting method indicates that the SiSe4 tetrahedra make the major contribution to its birefringence.
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高影响因子
Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 6
·1427-1438
·
IF 4.912
Xing Li,Yongshun Bai,Mingshan Wang,Guoliang Wang,Yan Ma,Lei Li,Bensheng Xiao,Jianming Zheng
Silicon is considered as an anode for next generation lithium ion batteries owing to its low discharge potential (∼0.4 V vs. Li/Li+) and high theoretical specific capacity (3500 mA h g−1). However, the drawbacks of Si, such as the low electronic conductivity, formation of an unstable solid electrolyte interphase (SEI), and extremely high volume expansion, limit its practical application. In this work, a silicon/nitrogen-doped reduced graphene oxide (Si/N-doped rGO) nanocomposite consisting of modified Si tightly wrapped in the rGO is prepared by a one-step hydrothermal process followed by carbonization. With nitrogen doping, the electronic conductivity and lithium-ion diffusion coefficient (DLi+) of the N-doped rGO are significantly improved. Meanwhile, the uniform distribution of Si particles along the N-doped rGO network and the intimate contact between them are able to efficiently buffer the volume change during repeated charge/discharge processes. Therefore, as compared with Si/rGO, the Si/N-doped rGO composite anode presents significantly improved electrochemical performance, delivering a reversible specific capacity as high as 1790 mA h g−1 with an initial coulombic efficiency of 77.6% and a capacity retention of 77.8% after 100 cycles at 200 mA g−1.
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高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
H. Tang,X.H. Xia,Y.J. Zhang,Y.Y. Tong,X.L. Wang,C.D. Gu,J.P. Tu
Construction of high-capacity anode is highly important for the development of next-generation high-performance lithium ion batteries (LIBs). Herein we fabricate Si/Ag nanowires/reduced graphene oxide (Si/Ag NWs/rGO) integrated composite film by introducing binary conductive networks (Ag NWs and rGO) into Si active materials with the help of a facile vacuum-filtration method. Active Si nanoparticles are homogeneously encapsulated by binary Ag NWs-rGO conductive network, in which Ag NWs are interwoven among the rGO sheets. The electrochemical properties of the integrated Si/Ag NWs/rGO composite film are thoroughly characterized as anode of LIBs. Compared to the Si/rGO composite film, the integrated Si/Ag NWs/rGO composite film exhibits enhanced electrochemical performances with higher capacity, better high-rate capability and cycling stability (1269 mAh g −1 at 50 mA g −1 up to 50 cycles). The binary conductive network plays a positive role in the enhancement of performance due to its faster ion/electron transfer, and better anti-structure degradation caused by volume expansion during the cycling process.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Chenyu Wang,Shuru Wu,Jingzheng Weng
As a prospective and efficient strategy to address the volume expansion of the Si nanoparticles , the binder plays an increasingly significant role in the Si anode of lithium-ion batteries. Based on the inspiration of natural physics and cross-linked networks, a functional (named polyacrylic acid-citric acid-polyethyleneimine) binder that is similar to a flexible polymer skeleton integrated with a tough framework and efficient self-healing behavior is designed to achieve long cycling stability for Si anodes. The cross-linked network can be stabilized by the amide bonds, formed by polyethyleneimine (PEI) and polyacrylic acid (PAA). Based on this, citric acid (CA) can be added to form multiple hydrogen bonds, whose carboxyl groups can also establish a more reversible cross-linked network with Si particles . Then, PEI and CA molecules can connect with PAA to form a “rigid and flexible” structure. The expansion stress of Si nanoparticles is relieved by the protective buffer layer built by the addition of PEI and CA molecules. In addition, PAA, PEI, and CA work together to solve the problem that the action of CA and PAA alone cannot perform well under large currents. Hence, this water-based binder with a three-dimensional cross-linked network structure with self-healing ability has better performance during cycling: at a current density of 0.2C, it still has a capacity of 2017.4 mAh·g −1 after 200 cycles, with a capacity retention rate of 80.7 % (1745.3 mAh·g −1 , 300 cycles, a capacity retention of 74.9 %).
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Huadong Fu,Yan Qin,Zhengwei Peng,Jipeng Dou,Zhixiong Huang
Lightweight phenolic matrix composites are highly potential in ablative thermal protective materials for future aerospace vehicles, and hybrid modification is considered as one of effective ways to improve the oxidation and ablation resistance of phenolic matrix. Herein, the co-continuous silica zirconium hybrid phenolic resin (SZRx) was synthesized, which can be used to prepare lightweight ablation resistant aerogel composites by the sol-gel method. The SZRx aerogel showed stable porous structure and excellent hydrophobicity, and the silicon zirconium hybrid greatly improved the high temperature carbon residue and oxidation resistance of phenolic resin. The SZRx aerogel composites also possessed excellent integrated characteristics of heat protection and insulation, with a linear ablation rate as low as 0.032 mm/s and a back temperature below 200 °C. The synergistic effect of silicon and zirconium formed the multiphase ceramic layer (C, SiO 2 , SiC and ZrO 2 ) with the sea-island-like structure on the surface of the composite material, which can effectively resist high-temperature ablation and aerodynamic exfoliation. This can indicate that silicon zirconium dual element hybrid phenolic resin is the highly competitive matrix for lightweight and ablation resistant composite materials.
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高影响因子
LANGMUIR
·
2024
·
IF 3.7
MengYao Lai,YaChao Wang,Fan Li,JiangPing Zhao
Through the substitution reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and sodium lignosulfonate (LS), a novel phosphorus-containing sodium lignosulfonate (DAL) was successfully synthesized via the solvothermal method and used as a multifunctional flame retardant to prepare a novel silicone-acrylic emulsion (SAE) composite Si–P–C coating. The structure of DAL was determined by X-ray diffraction (XRD), attenuated total reflection infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and nuclear magnetic resonance (solid-state 13C NMR and 31P NMR). The results demonstrated that incorporating an appropriate dosage of DAL (0.9 g, 1.5 wt %) into SAE-based composite coatings enhances flame retardancy and reduces heat release and smoke production during burning. The peak heat release rate (p-HRR) decreases from 236.7 to 120.3 kW·m–2, total smoke production (TSP) decreases by 71.1%, and the flame-retardant index increases from 1.00 to 4.58. Meanwhile, the coating is transformed into a dense and nonflammable vitreous polyphosphate barrier layer during the firing process to prevent heat or mass transfer. Furthermore, the pyrolysis kinetics identify that the 3D Z–L–T model governs the coatings’ pyrolysis, and the appropriate DAL makes the pyrolysis Eα climb from 300.98 to 331.30 kJ·mol–1 at 358–439 °C. Hence, this study presents a new synthesis method of multifunctional flame retardant DAL, studies the excellent properties and cross-linking mechanism of DAL-doped SAE-composite Si–P–C coatings, and explores a halogen-free, low-carbon, and clean eco-technology strategy.
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PubMed
高影响因子
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