JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Biao Zhang,Feng Ye,Shichao Liu,Haoqian Zhang,Qiang Liu,Ye Gao,Jie Ma
In this study, we developed a new route to fabricate polymer/ceramic composites. This method mainly involves tape casting and vacuum assist infiltration (called TC-VI). Composites, using Bisphenol-A cyanate ester resin (BADCy) as matrix and mixed dielectric ceramic powders (1− x ) Ni 0.5 Ti 0.5 NbO 4 + x ZnNb 2 O 6 ( x = 0–100 vol. %) as fillers, were prepared successfully by this route. Dielectric properties and thermal conductivity of the composites were tested. Furthermore, the migration of silver (Ag) electrodes in the composites was investigated. Results show that the composites exhibit excellent dielectric properties. Dielectric constant of the composites can be adjusted continuously from 13.49 to 22.46 (at 9045 MHz). Dielectric loss is lower than 3.68 × 10 −3 (at 7320 MHz). The addition of ceramic fillers can significantly enhance the thermal conductivity of BADCy resin. Moreover, no obvious Ag element migration can be detected in the composites. Due to the good performances of the composites, this method could be widely used in the fabrication of multilayer devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yue Jia,Han Zhang,Huiyan Zhou,Yan Wang,Caiming Wang,Mengchen Yang,Chunxue Zhai,Xiaofei Qi,Dengwei Hu,Lili Zhao,Bin Cui
Flexible dielectrics play a crucial role in the advancement of capacitors. However, their limited energy storage density is an obstacle to both their application scope and miniaturization efforts. Inspired by an “egg effect”, this study introduces an innovative egg-like ceramic filler, namely Ba 0.34 Sr 0.51 Ca 0.15 Zr 0.1 Ti 0.9 O 3 -Y@Ba 0.34 Sr 0.51 Ca 0.15 Zr 0.1 Ti 0.9 O 3 -Mn@ZrO 2 (BSCZT-Y@BSCZT-Mn@ZrO 2 ), which is developed via a core–shell doping process. The separation of electrons and holes in the “egg yolk” (donor-rich core) and “egg white” (acceptor-rich shell) coupled with the current-limiting “eggshell” (wide bandgap oxide) in the ceramic fillers, resulting in a large effective polarization Δ P , a higher dielectric permittivity ε r , a lower tan δ , and a significant increase in the discharged energy storage density W rec of the composites. Together with the phase transition from α-PVDF to β-PVDF caused by the electrostatic interaction between fillers and PVDF, an ultra-high W rec of 33.2 J/cm 3 is achieved in the BSCZT-Y@BSCZT-Mn3@ZrO 2 /PVDF, which has the Δ P of 28.5 μC/cm 2 at 296.7 MV/m, along with ε r of 21.7 and tan δ of 0.018 at 1 kHz. Significantly, the composite film exhibits outstanding bending endurance. Even after 600 full bends, over 92 % of the capacitance retention rate can be retained. This research highlights the potential of ceramic filler structural design for flexible capacitors in low-power flexible electronics.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Sajid Hussain Siyal,Syed Shoaib Ahmad Shah,Tayyaba Najam,Muhammad Sufyan Javed,Muhammad Imran,Jin-Le Lan
Due to the degradation of lithium-metal anode, lithium dendritic growth and other challenging problems like interface resistance among electrolyte and electrode may damage the actual performance of lithium-metal batteries (LMB). Recently, ceramic nanofillers Li1.3Al0.3Ti1.7P(O4)3 (LATP) and Li0.33La0.557TiO3 (LLTO) seem to be suitable solid-state electrolytes for lithium metallic solid-state batteries with outstanding energy densities and highly safer energy storage devices. Herein, the solid-state electrolytic materials are composed of a fast ion-conducting solid-state LATP, LLTO, and optimized amount of adequate polarized poly(vinylidene fluoride) (PVDF) electrolyte with lithium salt (LiClO4) to fabricate the dual semi-solid-state polymer electrolyte (DSPE) membrane. The prepared membrane provides a promising solution for battery safety and the most challenging problems of interface resistance. The proposed DSPE membrane is investigated via analytical techniques; testing results showed that the DSPE membrane possesses excellent electrochemical performance, including suitable Li-transference numbers and improved ionic conductivities with enhanced stability. Furthermore, the DSPE membrane is beneficial to resist the growth of Li dendrites effectively. The symmetrical cell Li//DSPE//Li exhibits excellent stability at a high current density of 1 mA/cm2 over 1000 h, and the membrane sustains long-cycle performance with a high retention of 95% after 100 cycles. The designed DSPE membrane opens a path of fabricating a safe electrolyte membrane for elevated temperature metal-ion battery applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Si-Wei Xiong,Pan Zhang,Qian Zou,Yu Xia,Meng-ying Jiang,Jing-Gang Gai
The formation of a continuous network for thermal transport is crucial for obtaining materials with high thermal conductivity . Herein, we report a novel epoxy-based composite with unique independent structures of liquid alloy (LQA) droplets and high thermal conductivity ceramic fillers . The ceramic fillers only aggregated in the spaces between the LQA droplets due to the low compatibility of the ceramic fillers and the LQA droplets, so that the LQA droplets and the ceramic fillers eventually form independent structures. This creates a continuous network in epoxy that is advantageous for thermal transport. Thermal conductivity measurements showed that the thermal conductivity of the Epoxy/LQA/ceramic composites can reach 2.46 W m −1 K −1 , for an enhancement of 1055.87% relative to pure epoxy. More importantly, the independent structures endowed the composites with excellent electrical safety. The electrical resistivity of the Epoxy/LQA composites was 8.53 × 10 7 Ω cm, while the electrical resistivities of the three Epoxy/LQA/ceramic composites were 3.11 × 10 11 Ω cm (Epoxy/LQA/Al 2 O 3 ), 2.41 × 10 11 Ω cm (Epoxy/LQA/Si 3 N 4 ), 4.45 × 10 11 Ω cm (Epoxy/LQA/h-BN), respectively. This work provides a new perspective on both the fundamental science and practical applications of thermal transport in polymer composites .
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2021
·Vol. 21
·期 1
·151-159
·
IF 2.025
Jingwen Ren,Yan Qin,Zhengwei Peng,Zhuangzhuang Li
By introducing functional fillers into the ethylene propylene diene monomer matrix, the anti-ablation, thermal insulation, and adhesive layer were prepared, respectively. We have studied the mechanical properties, ablation properties, thermal insulation properties, and bonding properties of different composite structures after design and analyzed the ceramic mechanism. The results showed that the content of ceramic fillers improved the thermal stability and ablation properties of anti-ablation layer composites. The formation of liquid structure can fill the hole defects and ablation pit. The foaming agent improved thermal insulation properties of the thermal insulation layer, and the strength of the bonding layer has been greatly improved. The design of the composite structure can not only reduce the density but also have an excellent thermal insulation effect. And as the thickness of the heat insulation layer increases, the heat blocking effect becomes more excellent.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhuoyuan Zheng,Xianlong Zhou,ZhengFeng Zhu,Jie Zhou,Guoqiang Zhong,Wangbing Yao,Yusong Zhu
Composite solid-state electrolytes (CSE) represent a promising alternative to conventional porous separators and organic liquid electrolyte systems in commercialized lithium metal battery (LMBs), offering effective dendrite suppression, high interfacial compatibility and enhanced cycle life. This study introduces a polymer-in-ceramic electrolyte, which is synthesized by blending perovskite-type inorganic electrolyte Li 1.5 La 1.5 TeO 6 (LLTeO) with polymethyl methacrylate (PMMA) and polyvinylidene fluoride (PVDF), denoted as PMMA/PVDF-LLTeO. The resulting CSE features a dense, non-porous structure, high mechanical strength, excellent thermal stability, and a broad electrochemical window. Notably, with the incorporation of a high ceramic filler content (up to 70 %), the CSE promotes a hybrid ion transport mechanism, yielding a near-single-ion conducting behavior with an ion transference number of 0.833, and a high elastic modulus of approximately 1 GPa. These attributes collectively contribute to the suppression of dendrite growth, as analyzed through multiphysics-based simulations. Li//Li symmetric cells using PMMA/PVDF-LLTeO-70 exhibit robust lithium stripping-plating stability, with a critical current density of 0.45 mA cm −2 . Furthermore, the corresponding Li//LiFePO 4 cells exhibit superior rate performance and cyclic stability, achieving over 150 cycles with a capacity retention rate of 92.2 % at high temperatures (60 °C). This research highlights the potential of the proposed CSE with high-temperature applications, significantly improving the safety and performance of LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 7
·987
·
IF 4.7
Yuanying Yu,Xiao Chen,Dajun Hou,Jingjing Zhou,Pengchao Zhang,Jie Shen,Jing Zhou
The noticeable difference in the coefficient of thermal expansion (CTE) for polytetrafluoroethylene (PTFE) coatings and copper substrates is a major challenge for thermal debonding of the copper-clad laminate (CCL) in high-frequency communications. Theoretically, ceramic fillers with low CTEs in the coating can effectively reduce the gap, and there remains a trade-off between the dispersibility of fillers and the interfacial interactions with the polymeric matrix. Here, we propose a novel approach to prepare a pentafluorobenzoyl chloride (PFBC)-modified polydopamine (PDA) shell on silica particles by using amidation. Such modified particles perform excellent dispersion and exhibit diminished interfacial gaps in the PTFE matrix, which highly reduces CTE to 77 ppm/°C, accounting for only 48.1% of the neat coating. Moreover, the composite exhibits enhanced mechanical strength and toughness, and consequently suppresses thermal debonding in CCL under high-temperature conditions. Therefore, results present a promising potential for its use in the next-generation CCL of high-frequency communication devices.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Rong Zhang,Fei Liang,Yuyao Zeng,Chuntian Yang,Zhongxin Wu
The high coefficient of thermal expansion (CTE) of polymeric composites can cause large deformation under temperature changes, affecting coupling with devices made of other materials in radio frequency (RF) communication systems and limiting their application in RF systems. In order to obtain polyphenylene sulphide (PPS)-based composites with low CTE, a series of PPS-based composites containing different loadings of ceramic powders (including Zr 2 WP 2 O 12 , BN, AlN , Al 2 O 3 ) were fabricated by melt extrusion method using PPS with 40 wt% glass fibre (GF) as matrix material. The experimental results showed that the PPS composites with Zr 2 WP 2 O 12 (ZWP) as a filler had a lower CTE compared to the samples with other fillers at the same filler loading. The CTE of PPS/GF/ZWP steadily decreased with increasing ZWP addition. At 20 vol% ZWP loading, a 67% (about 18 ppm/°C) reduction of CTE compared to the PPS/GF was achieved. The addition of ZWP powder to PPS/GF also led to an improvement in the dielectric loss of the composite. When the ZWP content is 20 vol%, the dielectric loss of the composites is about 0.0035, which is 24.4% lower than PPS/GF. Hence, the PPS/GF/ZWP composites have great potential for applications in RF communication systems.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2022
·Vol. 9
·期 3
·568-576
·
IF 8.589
Qiujun Wang,Weiqi Zhu,Ya Su,Di Zhang,Zhaojin Li,Huan Wang,Huilan Sun,Bo Wang,Dan Zhou,Li-Zhen Fan
Lithium metal batteries based on solid electrolytes are considered as promising candidates with high energy density and safety. However, the weak solid-solid contact between electrolyte and electrode can easily lead to interface instability and lithium ions discontinuous migration, which seriously reduces the electrochemical performance of the battery. Herein, we construct a soft gel interfacial layer to improve the stability of the solid-solid interface between electrolyte and electrode by means of polyester-based monomers and imidazole-based ionic liquids. Based on this, garnet-type Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles as inorganic ceramic filler were introduced in the layer to obtain composite electrolytes with high ionic conductivity (up to 1.1 × 10 −3 S/cm at 25 °C). As a result, the assembled lithium symmetric battery of Li|THCE-15%LLZTO|Li suggests excellent cycling stability with 700 h at 0.1 mA/cm 2 at 50 °C, and the lithium metal batteries of LFP|THCE-15%LLZTO|Li delivers high initial discharge capacity of 128.2 mA ·h/g with capacity retain of 75.48% after 150 cycles at 2 C. This work paves a new route to build safe and stable lithium metal batteries with synergistic introduction of composite electrolytes between electrolyte and electrode using soft gel interfacial layer and inorganic filler.
研究领域:
电化学
·
材料科学
·
能源存储
·
固体离子学
·
界面工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Rong-Ao Tong,Yilei Huang,Chang Feng,Yanhao Dong,Chang-An Wang
Solid-state lithium metal batteries are under development for higher energy density and better safety. A key is to develop new electrolyte systems that are readily processible and capable to improve electrochemical cycling stability. In this study, A quasi-solid-state composite electrolyte based on low-molecular-weight polyethylene glycol dimethyl ether (PEGDME) in situ confined within polymerized methyl methacrylate (PMMA) backbone is designed and presented. The new design of the polymer matrix, together with Li + -conducting ceramic fillers and appropriate lithium salts, has satisfactory Li-ionic conductivity (1.1 × 10 −4 S cm −1 at 30 C and 1.0 × 10 −3 S cm −1 at 80 °C), good electrochemical stability (>4.7 V vs Li + /Li), and high compatibility with lithium metal anode, enabling room-temperature operation and stable long-term cycling of both Li||Li symmetric cells and lithium-metal full cells (including LiFePO 4 or LiCoO 2 cathode). This work can extend the design boundaries of composite electrolytes meaningfully, and the idea of in situ polymerization limiting applies to almost all low-molecular-weight polymers, high-molecular-weight backbones, ceramic fillers, lithium salts, and additives in future development of room-temperature solid-state lithium metal batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yan-Yun Sun,Qi Zhang,Lei Fan,Dian-Dian Han,Li Li,Lei Yan,Pei-Yu Hou
Composite solid-state electrolyte (CSSE) with integrated strengths avoids the weaknesses of organic and inorganic electrolytes, and thus become a better choice for all-solid-state lithium battery (ASSLB). However, the poor dispersion of inorganic fillers and the organic/inorganic nature difference leads to their interface incompatibility, which greatly destroys the performance of CSSE and ASSLB. Herein, silane coupling agent (SCA) aminopropyl triethoxysilane (ATS) is introduced to tailor the organic/inorganic interfaces in CSSE by the common chemical bridging effect of SCA and the special amino effect (hydrogen bond and lone pair electron effects). It is found that the hydrogen bond interaction between –NH 2 and polyethylene oxide (PEO) enhances their interface interaction. And the lone pair electrons on nitrogen atom allow it to react with solvent acetonitrile and promote the uniform dispersion of ceramic fillers. Moreover, the lone pair electrons can complex with Li + , which promotes the dissociation of Li salts, uniforms Li + diffusion and inhibits the Li dendrite. Thanks to the above merits, the interface compatibility and stability of organic/inorganic CSSE are much enhanced by innovatively introducing ATS, showing high ionic conductivity and superior mechanical/thermal stability. The ASSLB with this modified CSSE exhibits excellent electrochemical performance with a reversible capacity of 140.9 mAh g −1 and a capacity retention of 94.4% after 280 cycles. These achievements offer a new insight into improving the stability of organic/inorganic CSSE interface and promoting their applicability into ASSLB.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2024
·
IF 1.2
Jingwen Ren,Jipeng Dou,Long Zhang,Shan He,Yan Qin,Huadong Fu
This work mainly studied the influence of SiC and Si3N4 composite fillers on the ablation performance of silica/phenolic composites. The effect of Si3N4 content on the mechanical and ablative properties of the composites was investigated, and the bridging effect between the two different ceramic fillers was analyzed. The results indicated that the mechanical properties and ablation properties of the composite were improved due to the combined effect of the SiC and Si3N4. When the content of Si3N4 was 36phr, the flexural strength at room temperature was 114.6 MPa, the flexural strength after 1200 °C treatment was 18.38 MPa, and the linear ablation rate was 0.011 mm/s in the 1600 °C oxyacetylene ablation test for 30s, while the flexural strength without Si3N4 at room temperature was 105.4 MPa, the flexural strength after 1200 °C treatment was 10.35 MPa, and linear ablation rate was 0.061 mm/s in the 1600 °C oxyacetylene ablation test for 30s. The bridges between the Si3N4 and SiC ceramic fillers can form SiO2, SiCN and Si2N2O in the high temperature environment, which helps fill the pores on the surface of the composite, forming an effective protective layer structure and improving the high temperature and erosion resistance of the composites.
研究领域:
材料科学
·
复合材料
·
高温材料
·
陶瓷填料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）