Nanomaterials
·
2023
·Vol. 13
·期 2
·257
·
IF 5.3
Junze Zhang,Hanwen Xu,Zhuanghao Zheng,Cong Wang,Xinru Li,Fu Li,Ping Fan,Yue-Xing Chen
For thermoelectric thin film, the substrate plays an important role during the growing process and produces effects on its thermoelectric properties. Some special kinds of substrates provide an optimal combination of influences on both the structure and thermoelectric properties. In this work, Bi-Sb-Te films are deposited on Si substrates with different initial orientations by magnetron sputtering in two ways: with and without a pre-coating process. The preferred orientations of the Bi-Sb-Te films are greatly affected by the substrates, in which the thin film tends to deposit on Si substrate with (100) initial orientation and high (015)-texture, while the (00l)-textured Bi-Sb-Te film easily deposits on Si substrate with (110) initial orientation. The experimental and theoretical calculation results indicate that Bi-Sb-Te film with (00l)-texture presents good electrical conductivity and a higher power factor than that of film with (015)-texture.
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高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Fei Wang,Xiang Ma,Yiren Li,Hongmei Liu,Qingping Wu,Xiang Guan,Hui Liu,Xiao Xia Wang,Jun Xu
Silicon (Si) with high specific capacity has received increasing attention for rechargeable battery anode materials. However, particle pulverization as a result of the large volume expansion of Si anodes further aggravated electrochemical performance degradation during the process of charging and discharging. In this work, we report the room-temperature rapid self-healing polymer binders (Al/Alg-TUEG) synthesized via dynamic coordination bonds (Al–O) and hydrogen bonds from poly(ether-thioureas) (TUEG). The prepared polymer binders exhibit a peeling force of 4.2 N, a swelling ratio of 9.5%, and a recovery of 90% in 2 h at room temperature. As a result, the Si@Al/Alg-TUEG anodes stably cycle for 300 cycles at 0.5 C with a capacity retention rate of 77.4%. A high initial Coulombic efficiency (CE) of 87.2% and good rate performance are also achieved. In terms of full cell performance, both LiFePO4//Si@Al/Alg-TUEG and NCM811//Si@Al/Alg-TUEG display stable cycling for 100 cycles at 0.5 C. The capacity retention of both full cells reaches 93.8 and 92.5%. Good recoverability at high rates is also found. The superior electrochemical performance of the Si anode indicates that Al/Alg-TUEG polymer with rapid self-healing capability at room-temperature is one of the promising binder candidates for next-generation high-energy-density lithium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
聚合物化学
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 9
·6048-6057
·
IF 3.9
Hu Sun,Xianglei Yu,Siqi Quan,Weichao Li,Zhuo Qian,Junpeng Li,Guoyou Gan
Environmental protection mandates have spurred the widespread adoption of lead-free glass in electronic material adhesion. Glass powder, crucial for solar silver paste, notably affects the ohmic contact at the Ag–Si interface of crystalline silicon solar cells. This study examines how TeO2 content influences the high-temperature flowability and wettability of lead-free Bi2O3–TeO2-based glass powder, alongside the interplay between the glass's thermal properties and interface contact. Additionally, it investigates the Bi2O3–TeO2 ratio's impact on current transmission through the interfacial glass layer. Experimental results show that the synthesized glass powder exhibits superior high-temperature flowability and wettability, with a low contact resistance of 1.5 mΩ cm2 in silver paste applications. This study also proposes an optimal approach for enhancing current transmission through the interfacial glass layer. Consequently, this glass powder is highly valuable for c-Si solar cell silver paste applications, offering novel insights into improving current transmission efficiency.
研究领域:
材料科学
·
光伏技术
·
电子材料
·
能源工程
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2021
·
IF 2.168
Yanhui Li,Caixia Zhang,Zhibo Li,Guangqin Pan
In this study, a new type of star multifunctional polyisoprene liquid rubber 4-arm star hydroxyl terminated polyisoprene (4HTPI-Si) that can be used for rocket solid propellant matrix was designed and synthesized by anionic polymerization method. It was characterized by Fourier Transform Infrared Spectroscopy (FT-IR), 1H Nuclear Magnetic Resonance Spectroscopy (1H-NMR) and Gel Permeation Chromatography (GPC), and the mechanical properties of the cured product obtained by blending with hydroxyl-terminated polybutadiene (HTPB) liquid rubber, a traditional solid propellant matrix, were studied. The results show that the aliphatic alkyl lithium initiator with silane-protected hydroxyl group and silicon tetrachloride coupling agent can polymerize isoprene monomers to obtain 4HTPI-Si with narrow molecular weight distribution (Mw/Mn = 1.14). The molecular weight of the polymer can be precisely designed, the average functionality is very close to 4. In the polymer synthesized in nonpolar solvent, 1,4- structure accounts for the majority. By proper blending, the tensile strength and elongation at break of the cured product of commercial HTPB can be improved by 281% and 66.7%.
研究领域:
高分子化学
·
材料科学
·
航空航天推进
·
弹性体与橡胶技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jingjing Liu,Bo Ren,Yedong Rong,Yi Zhao,Lu Wang,Yuju Lu,Chao Wang,Guolong Sang,Jinlong Yang
Engineering high performance cellular ceramics with both ultralow density and satisfactory compressive strength for practical applications still represents a grand challenge. Herein, alumina-based cellular ceramics bonded by in-situ formed mullite phase were constructed by Al 2 O 3 –Si-boehmite particle-stabilized foams. The gelation of boehmite sol improved the stability and harnessed the deformation of dried Al 2 O 3 –Si composite foam. The oxidation of silicon and further generation of in-situ mullite phase enhanced the chemical bond between alumina particles on cell walls, resulting in the superior mechanical properties. As an exemplar, the resulting cellular ceramic possessed the robust compressive strength of 2.26 MPa at a high porosity of 87.8%. The gelation-assisted Al 2 O 3 –Si particle-stabilized foams provide a facile and convenient strategy for construction of composite ceramic foams with high porosity and robust strength.
研究领域:
材料科学
·
无机非金属材料
·
多孔材料
·
陶瓷工程
·
结构功能一体化材料
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DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·
IF 15
Zhao Haiting,Meng Li,Du Peng,Chen Yun,Gong Mengqi,Zan Bo,Chen Jiaxin,Zeng Mengting,Liao Yiwei
Glioblastoma (GBM) is a highly lethal brain tumor with limited treatment efficacy due to therapy resistance and the blood-brain barrier (BBB). Here, we developed tLyP-1-modified polyethylene glycol (PEG)-coated hollow catalase-mimicking MnO₂-based nanocarriers (HM@si-SLC16A1/TMZ-tLyP-1, tLyP-NPs) for the targeted co-delivery of temozolomide (TMZ) and SLC16A1 siRNA (si-SLC16A1). These nanoparticles generate oxygen through H₂O₂ decomposition, alleviating tumor hypoxia and enhancing MRI imaging via Mn²⁺ release. In vitro, tLyP-NPs exhibited high siRNA loading efficiency, pH-responsive drug release, and effective SLC16A1 silencing, leading to reduced glioma cell viability and enhanced apoptosis under both normoxic and hypoxic conditions. tLyP-1 modification facilitated BBB penetration and glioma targeting, as evidenced by increased cellular uptake in a BMEC–C6 glioma co-culture model. In an orthotopic GBM rat model, the nanoparticles demonstrated superior tumor accumulation, prolonged T1-weighted MRI contrast, and enhanced therapeutic efficacy compared to non-modified formulations. Mechanistically, SLC16A1 silencing induced intracellular lactate accumulation, suppressed lactate-stimulated HCAR1/PI3K/AKT signaling, and promoted apoptosis in both in vitro and in vivo models. Histological analysis showed extensive tumor necrosis, increased apoptosis (Caspase-3, TUNEL), reduced proliferation (Ki67), and alleviated hypoxia (HIF-1α). Survival analysis revealed significantly prolonged survival without systemic toxicity. Collectively, tLyP-NPs represent a promising multifunctional nanoplatform that integrates BBB penetration, TME-responsive drug release, and synergistic chemo-gene therapy for GBM treatment. Graphical abstract
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Chenxiang Feng,Wei Jian,Agula Bao,Yang Dong
The massive accumulation of fly ash poses serious threats to the environment and land resources, making its effective utilization urgently needed. Although fly ash can be used to prepare silicon-carbon composites, the formation pathways of Si-OH/Si-O-C groups, the construction of Si-C bonds, and the regulation of microstructure remain unclear. In this study, a series of novel silicon-carbon composites (FAKXNY-Z) with unique microstructures were synthesized via high-temperature activation combined with hydrothermal crystallization, using fly ash and chitosan as raw materials. Among them, FAK2N2–150 exhibits a high specific surface area (1511.7 m 2 /g) and abundant active functional groups (Si-OH). This material achieves an adsorption capacity of 550.55 mg g −1 for tetracycline at room temperature. Density functional theory (DFT) calculations based on the experimental structure confirm its distinctive amorphous silica layer derived from sodalite collapse and reveal the adsorption mechanism toward tetracycline (TC), clarifying the strong affinity between Si-OH groups and TC molecules. This work not only provides a feasible strategy for the resource utilization of fly ash, but also offers theoretical support for the design of solid-waste-based functional adsorbents.
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产品关联
DOI
高影响因子
Small Methods
·
2026
·
IF 8.7
Rui Wang,Xinyu Zhao,Xiaoyu Li,Hui Kong,Zengqing Sun,Ailin Xia,Zhaoyang Wu
To reduce carbon emissions associated with the traditional preparation of Fe–Si (6.5 wt.%) alloy powder, the main precursor of high-frequency soft magnetic composites, this study developed a green, controllable, and melt-free powder-preparation methodology enabled by defect-architecture engineering. Hydrogen-reduced iron powders are first subjected to surface mechanical attrition treatment (SMAT) and subsequently processed via a dual-stage heat-treatment protocol, comprising low-temperature Si infiltration at 565°C followed by homogenization at 900°C, to achieve rapid alloying and uniform silicon distribution. SMAT generated a gradient nanostructure through high-strain-rate deformation via dislocation multiplication and grain-boundary rearrangement, providing short-circuit diffusion paths that lowered the silicon infiltration temperature to 565°C. After homogenization at 900°C, silicon was evenly distributed throughout the prepared Fe–Si alloy powder. As proof of method, Fe–Si@boron nitride soft magnetic composites prepared from this material exhibited low power loss (201.5 kW/m 3 at 100 kHz and 50 mT), and high permeability retention (>80% under a 7.96 kA/m DC bias), outperforming mainstream commercial counterparts. Overall, this defect-enabled route offers an energy-efficient strategy for scalable low-temperature diffusion alloying of metal powders and for fabricating high-performance soft magnetic composites.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·12373-12384
·
IF 3.553
Liu Yuansheng,Liu Huitian,Huang Wenlong,Yu Yu,Dai Xiaoqian,Shan Zhongqiang
Dramatic volumetric variation and poor cyclic stability are great challenges for the practical application of Si anode in lithium-ion batteries. In this work, hierarchical microsized hard carbon-supported Si encapsulated in nitrogen-doped carbon (HC/Si@NC) composites is successfully synthesized via electrostatic self-assembly between an intrinsic negatively charged hard carbon precursor and positively charged Si nanoparticles for the first time. Resorcinol formaldehyde resin sphere synthesized through a low-cost extended Stöber method is used as the carbon core precursor to support Si nanoparticles, followed by carbon coating and carbonization process to further fix Si on the carbon core and enhance the conductivity. The hierarchical structure where Si nanoparticles are tightly anchored onto the carbon core can significantly alleviate the volumetric expansion of Si, and the carbon can enhance the conductivity of the composites. As a result, the as-achieved HC/Si@NC composites exhibit outstanding cycling stability and good structural integrity maintenance. The composites deliver a reversible capacity of 541 mAh g −1 with a capacity retention of 92.1% after 100 cycles at a current density of 0.2 A g −1 and a capacity of 350 mAh g −1 after 300 cycles at a higher current density of 1 A g −1 .
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Liang Guo,Bingzhi Yan,Jiangrong Hou,Heya Zheng,Chuxiao Sun,Yanpei Xu,Qi Wang
Silicon, the most promising anode material for ultra-high specific capacity lithium-ion batteries, has been impeded from widespread use due to its large volume effects and limited electrical conductivity during cycling. In this study, we employed a facile one-step hydrothermal method to in-situ grow a Si@NiO core-shell structure on an MXene substrate, with the aim of optimizing its performance. The MXene substrate provides excellent electrical conductivity and structural stability; Si serves as the primary source of capacity contribution; NiO acts as an interlayer, bridging the substrate and the active material while mitigating the volume expansion of Si. This dual modification strategy, which targets both structure and interface, endows the Si anode with superior electrochemical performance. After 175 cycles at 0.1 A g −1 and 900 cycles at 1 A g −1 , the capacity of the electrode rose to 1530 m Ah g −1 and 1608 m Ah g −1 , Benefiting from the core-shell structure and optimized porous architecture, the electrode exhibits a volume expansion as low as 34 % after 900 cycles, effectively suppressing electrode pulverization failure caused by Si anode volume expansion. This study holds significant importance, as the simple and cost-effective one-step hydrothermal method also provides a reliable strategy for the commercial application of silicon anodes.
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产品关联
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Fei Wang,Bo Wang,Tingting Ruan,Tiantian Gao,Rensheng Song,Fan Jin,Yu Zhou,Dianlong Wang,Huakun Liu,Shixue Dou
Silicon (Si), a promising candidate for next-generation lithium-ion battery anodes, is still hindered by its volume change issue for (de)lithiation, thus resulting in tremendous capacity fading. Designing carbon-modified Si materials with a void-preserving structure (Si@void@C) can effectively solve this issue. The preparation of Si@void@C, however, usually depended on template-based routes or chemical vapor deposition, which involve toxic reagents, tedious operation processes, and harsh conditions. Here, a facile templateless approach for preparing Si@void@C materials is reported through controlling the growth kinetics of resin, without the use of toxic hydrofluoric acid or harsh conditions. This approach allows great flexibility in tuning the crucial parameters of Si@void@C, such as the carbon shell thickness, the reserved void size, and the number of Si cores coated by a carbon shell. The optimized Si@void@C delivers a large specific capacity (1993.2 mAh g–1 at 0.1 A g–1), excellent rate performance (799.4 mAh g–1 at 10.0 A g–1), and long cycle life (73.5% capacity retention after 1000 cycles at 2.0 A g–1). In addition, a full cell fabricated with a Si@void@C anode and commercial LiFePO4 cathode also displays an impressive cycling performance.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhihao Zhang,Hangjun Ying,Pengfei Huang,Shunlong Zhang,Zhao Zhang,TianTian Yang,Wei-Qiang Han
Silicon is an ideal anode candidate for next-generation lithium-ion batteries (LIBs) due to its high specific capacity, low working potential and abundant sources. However, its practical application is seriously hindered by its huge volume expansion, which leads to the destruction of the electrode structure and the short cycle life. Herein, we fabricated flexible self-supporting binder-free porous silicon/MXene-2:1 composite film (pSi/MXene-2:1 film) as anode for LIBs by vacuum filtration. The pSi possesses sheet-shape resulting from layered montmorillonite, which is beneficial to shorten ion transport length. Furthermore, the pSi/MXene-2:1 film possesses excellent mechanical flexibility and the voids in the structure can well accommodate the volume expansion during cycling. Benefitting from these advantages, the pSi/MXene-2:1 film anode shows steady cycling performance with 1039.3 mAh/g at 500 mA g −1 after 200 cycles and excellent rate performance with 840.3 mAh/g at 5 A/g. Furthermore, a high reversible capacity of 1201 mAh/g can be obtained at 1 A/g for pSi/MXene-2:1 || LiFePO 4 full cell. This work provides a strategy to fabricate high-capacity and long-cycle self-supporting silicon-based anodes for flexible LIBs.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）