PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 23
·14424-14429
·
IF 3.945
Wenwen Deng,Weibo Shi,Shuchan Wang,Zehua Yan,Zhen Rui,Qingling Wang,Chang Ming Li
We innovatively used a polypropylene (PP) separator as a substrate and PEO-LiTFSI-SN as a paste to coat on both of the PP surfaces, and formed a sandwich-like solid polymer electrolyte (SPE). The SPE shows a conductivity of 4.22 × 10−3 S cm−1 at room temperature and 7.75 × 10−5 S cm−1 at 0 °C. The pyrene-4,5,9,10-tetraone (PTO)||SPE||Li battery shows a maximum discharge specific capacity of 187.8 mA h g−1 at a current density of 20 mA g−1 under 0 °C. After 100 cycles, the capacity could still be obtained at 88.4 mA h g−1, and the coulombic efficiency stayed stable at 98%. This work paved a new way for the development of solid-state organic batteries (SSOBs) at low temperatures.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Weiwei Li,Wenying Zhou,Na Lin,Mengting Liu,Jing Liu,Ying Wang,Bo Wang,Dengfeng Liu,Mengxue Yuan
High dielectric permittivity ( ε ) but low loss polymeric composites have presented wide applications. To elevate the overall dielectric performances in raw zinc oxide (ZnO)/polyvinylidene fluoride (PVDF), the prepared aluminum oxide (Al 2 O 3 ) encapsulated ZnO core-shell particles were incorporated into the polypropylene (PP) modified PVDF blend to generate high ε and breakdown strength ( E b ) but low loss nanocomposites. The Al 2 O 3 shell’ impacts on the dielectric performances of the ZnO/PVDF-PP were investigated. The results indicate that the insulating Al 2 O 3 shell induces concurrent interparticle polarization and intraparticle polarization leading to evidently enhanced ε , and effectively restrains the leakage current resulting in simultaneously suppressed loss and elevated E b in the nanocomposites. Further, the introduced alumina shell can induce traps and capture charge carrier thus resulting in enhanced E b . Through facilitating the intra-particle polarization and repressing the charge migration, the 50 wt% ZnO@Al 2 O 3 /PP-PVDF present a much higher ε (16) and E b (11 kV/mm) but lower dielectric loss (0.08), respectively, far exceeding 9.6, 9 kV/mm and 0.18 at 100 Hz for the unmodified ZnO nanocomposites. Further, the dielectric parameters of the nanocomposites can be effectively tuned via tailoring the Al 2 O 3 shell thickness. The fitting via the Havriliak-Negami equation theoretically interpret the experimental results and uncover the underlying multiple polarization mechanisms. This work provides deep insight into the design and development of flexible polymeric nanodielectrics with eminent integrated dielectric properties for appealing applications in electronic device and power system.
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 5
·e70202
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IF 3.4
Chaoxin Wang,Qi Wang,Yongliang Wang,Peigang He,Zhidong Han
The developing trends of electrical and electronic devices in high-power operation, densified installation, and structural miniaturization challenge the application of the composites with efficient thermal conductivity. In view of the manufacture technology of polyolefin materials, the melt-processing strategy was designed to prepare the thermally conductive composites based on polypropylene/polyolefin elastomer (PP/POE) blend with hexagonal boron nitride (hBN) and alumina oxide (Al 2 O 3 ). By filling hBN and Al 2 O 3 separately into the co-continuous PP/POE blend, the selectively distributed structure with hBN in the PP phase and Al 2 O 3 in the POE phase was revealed, and the thermal conductivity of the composites was improved with selective filler distribution. The processing scheme exerted distinct influences on the distribution structure and the thermal conductivity of the composites with the same filler content. A superior thermal conductivity of 0.80 W/(m K) was achieved with the individually distributed structure of BN and Al 2 O 3 together with the bridged interaction between PP/BN and POE/Al 2 O 3 phases. The reduction in interfacial thermal resistance contributed to the enhanced thermal conductivity according to the simulation with finite element analysis (FEA). The proposed strategy provides an efficient way to mass manufacture thermally conductive polypropylene composites.
研究领域:
材料科学
·
高分子材料工程
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产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 5
·3660-3665
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IF 1.354
Kong Qinghong,Wu Ting,Wang Jiaqi,Liu Hong,Zhang Junhao
Nickel and aluminum layered double hydroxide (NiAl-LDH) was synthesized via co-precipitation and modified by sodium dodecyl sulfate (SDS), which was marked as NiAl-OLDH. The structure of NiAl-LDH was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In
order to investigate the role of LDH on polymer/intumescent flame retardant (IFR) systems, polypropylene (PP)/IFR/NiAl-OLDH nanocomposites were prepared by melt intercalation. Thermal and flame retardant properties of PP/IFR/NiAl-OLDH nanocomposites were studied. The results indicated that
incorporation of NiAl-OLDH in PP/IFR composites significantly improved the thermal stability, flame retardancy and smoke suppression properties. With the addition of 5 wt% NiAl-OLDH, PP/IFR/NiAl-OLDH nanocomposites obtained UL-94 V0 level and the LOI value reached 27.5%. Compared with those
of PP/IFR, the peak heat release rate (PHRR), total heat release (THR) and peak smoke production rate (PSPR) values reduced 49%, 10%, and 63%, respectively, which were attributed to the barrier effect and excellent charring performance of NiAl-OLDH.
研究领域:
材料科学
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高分子化学
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消防安全工程
·
纳米复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Cheng Li-Qian,Gong Yi,Chen Kai,Hao Xuxia,Jiang Min,Dai Yu,Xie Xinyuan
LiMn 0.8 Fe 0.2 PO 4 (LMFP) cathode has emerged as a promising candidate for high-energy–density lithium-ion batteries due to its cost-effectiveness, high voltage plateau and intrinsic safety. However, drawbacks such as low electrical conductivity, Jahn–Teller effect and Mn 2+ dissolution severely limit its application potential. Herein, we propose a strategy that couples B-F co-doping with HAP@PP separator modification to simultaneously boost the conductivity of LMFP and mitigate Mn 2+ leaching using a facile solid-phase method. The optimized LiMn 0.8 Fe 0.2 P 0.99 B 0.01 O 3.97 F 0.03 (LMFP-BF1) exhibits superior rate capability and excellent cycle stability, which delivers a discharge capacity of 137.4 mAh g −1 and retains 92.6% of that capacity at 1C after 300 cycles. Moreover, HAP@PP separator exhibits an excellent manganese capture effect, which reduces the precipitation of manganese content from 134.647 to 14.056 mg kg −1 . The LMFP-BF1|HAP@PP cell remains a discharge capacity of 140.6 mAh g −1 at 0.5–45 ℃ after 100 cycles, with a capacity retention rate of 88.31%. This study offers insights into integrating ion doping and separator modification for phosphate-based high-energy–density lithium-ion batteries. Graphical abstract B-F co-doping and modified HAP@PP separator can simultaneously boost the conductivity of LMFP and mitigate Mn 2+ leaching, delivering superior cycling stability.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Chenxi Wang,Long Zhang,Xuwen Yao,Xiaoqi Guo,Jian Liu,Jie Tang,Qiaoli Lin
The compatibility of polypropylene (PP) and poly(methyl methacrylate) (PMMA) critically governs their properties, yet inherent immiscibility causes phase separation and weak interfacial adhesion. To overcome these limitations and simplify compatibilization, amphiphilic fluorescent Janus nanoparticles (TPE@Janus NPs) were synthesized via emulsion polymerization and applied as a novel compatibilizer in PP/PMMA blends prepared by melt blending. Fluorescence tracing confirmed preferential localization of TPE@Janus NPs at the PP/PMMA interface, which reduced interfacial energy and inhibited phase separation. At an optimal loading of 0.9 wt%, the PMMA domain size decreased by 42 %, while impact and tensile strengths increased by 31 % and 23 %, respectively. Thermal stability was also enhanced, with T 50 increasing by nearly 150 °C (from 410.8 to 557.0 °C). This study establishes the dual functionality of TPE@Janus NPs—as a highly effective compatibilizer and an in situ fluorescent probe for interfacial dynamics—offering a practical strategy for the rational design of advanced polymer composites with tailored interfacial properties.
研究领域:
材料科学
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聚合物复合材料
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纳米技术
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界面工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 5
·775
·
IF 3.164
Fei Sun,Ting-Ting Li,Haitao Ren,Qian Jiang,Hao-Kai Peng,Qi Lin,Ching-Wen Lou,Jia-Horng Lin
This study aims to produce polypropylene (PP)/titanium dioxide (TiO2) melt-blown membranes for oil/water separation and photocatalysis. PP and different contents of TiO2are melt-blended to prepare master batches using a single screw extruder. The master batches are then fabricated into PP/TiO2melt-blown membranes. The thermal properties of the master batches are analyzed using differential scanning calorimetry and thermogravimetric analysis, and their particle dispersion and melt-blown membrane morphology are evaluated by scanning electron microscopy. TiO2loaded on melt-blown membranes is confirmed by X-ray diffraction (XRD). The oil/water separation ability of the melt-blown membranes is evaluated to examine the influence of TiO2content. Results show that the thermal stability and photocatalytic effect of the membranes increase with TiO2content. TiO2shows a good dispersion in the PP membranes. After 3 wt.% TiO2addition, crystallinity increases by 6.4%, thermal decomposition temperature increases by 25 °C compared with pure PP membranes. The resultant PP/TiO2melt-blown membrane has a good morphology, and better hydrophobicity even in acetone solution or 6 h ultraviolet irradiation, and a high oil flux of about 15,000 L·m−2·h−1. Moreover, the membranes have stabilized oil/water separation efficiency after being repeatedly used. The proposed melt-blown membranes are suitable for mass production for separating oil from water in massively industrial dyeing wastewater.Keywords:polypropylene;membranes;melt-blowing process;oil/water separation;photocatalysis
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 11
·975
·
IF 4.4
Shuilan LYU,Xin Zhang,Sheng Huang,Shuanjin Wang,Min Xiao,Dongmei Han,Yuezhong Meng
Lithium metal batteries (LMBs) are anticipated to meet the demand for high energy density, but the growth of lithium dendrites seriously hinders its practical application. Herein, we constructed a kind of composite separator (ZIF-90@PP) consisting of zeolite imidazole framework-90 (ZIF-90) and polypropylene (PP) to promote the uniform deposition of Li+and inhibit the growth of lithium dendrites. The aldehyde groups interacting with TFSI−and the nitrogen-containing negative groups attracting Li+of ZIF-90 can facilitate the dissociation of LiTFSI to release more Li+, thus alleviating the influence of space charge near the electrode surface and accelerating the transfer of Li+. Not only does the excellent electrolyte wettability of ZIF-90 enhance the electrolyte retention capacity of the separator, but the orderly nano-channels in ZIF-90 also restrict the free migration of anions and homogenize the distribution of Li+. Consequently, the functional separator achieves a long-term stable Li plating/stripping cycling for over 780 h at 2 mA cm−2. Moreover, an impressive average coulombic efficiency of 98.67% at 0.5 C after 300 cycles is realized by Li || LFP full cells based on ZIF-90@PP with a capacity retention rate of 71.22%. The high-rate and long cycling performance of the modified Li || LFP cells further demonstrates the advantages of the ZIF-90@PP composite separator.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2021
·Vol. 13
·期 23
·4210
·
IF 4.329
Bingyi Ma,Xin Zhang,Xiaoqian Deng,Sheng Huang,Min Xiao,Shuanjin Wang,Dongmei Han,Yuezhong Meng
Lithium–sulfur batteries (LSBs) have attracted wide attention, but the shuttle effect of polysulfide hinders their further practical application. Herein, we develop a new strategy to construct a Ketjen black@zeolite imidazole framework-8/polypropylene composite separator. Such a separator consists of Ketjen black (KB), zeolite imidazole framework-8 (ZIF-8) and polypropylene (PP) with a low coating load of 0.06 mg cm−2and is denoted as KB@ZIF-8/PP. KB@ZIF-8/PP can absorb polysulfides because of the Lewis acid-base interaction between ZIF-8 and polysulfides. This interaction can reduce the dissolution of polysulfides and suppress the shuttle effect, thereby enhancing the electrochemical performance of the battery. When tested at a current density of 0.1 C, an LSB with a KB@ZIF-8/PP separator exhibits low polarization and achieves a high initial capacity of 1235.6 mAh/g and a high capacity retention rate of 59.27% after 100 cycles.Keywords:lithium–sulfur battery;separator;shuttle effect;metal-organic framework;chemisorption
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Membranes
·
2022
·Vol. 13
·期 1
·14
·
IF 4.562
Jingjun Peng,Bhaskar Jyoti Deka,Shaodi Wu,Zhongyuan Luo,Jehad A. Kharraz,Wei Jia
Water pollution caused by oil spills or sewage discharges has become a serious ecological environmental issue. Despite the membrane separation technique having a promising application in wastewater purification, the membrane fabrication method and separation robustness have remained unsatisfactory until now. Herein, we developed a novel strategy, spacer-assisted sequential phase conversion, to create a patterned polyvinylidene fluoride@polypropylene (P-PVDF@PP) substrate membrane with a multiscale roughened surface. Based on that surface structure, the underwater oil resistance behavior of the P-PVDF@PP membrane was improved. Moreover, owing to the abundant active sites on the P-PVDF@PP surface, the polydopamine/P-PVDF@PP (PDA/P-PVDF@PP) Janus membrane could be readily fabricated via wet chemical modification, which exhibited excellent switchable oil–water separation performance. Regarding surfactant-stabilized oil-water emulsion, the as-prepared PDA/P-PVDF@PP Janus membrane also had robust separation efficiency (as high as 99% in the n-hexane/water, chloroform/water, and toluene/water emulsion separation cases) and desirable reusability. Finally, the underlying mechanism of emulsion separation in the PDA/P-PVDF@PP Janus membrane was specified. The as-designed PDA/P-PVDF@PP Janus membrane with high-efficiency oil–water separation shows potential application in oily wastewater treatment, and the developed fabrication method has implications for the fabrication of advanced separation membranes.Keywords:emulsion separation;Janus membrane;patterned interface;switchable wettability
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2024
·
IF 3.1
Wang Yunfei,Gao Shanjun,Yin Nian,Chen Yuhan,Shen Chunhui,Yu Yi
A new hyperbranched charring-foaming agent (PCAT) containing triazine and triazole groups was successfully synthesized and characterized, and its special pyrolysis behavior was analyzed. It was combined with PAPP as an acid source to form an intumescent flame-retardant system. The composite with 20% flame retardants containing PAPP/PCAT (3:1) showed better flame-retardant and smoke suppression properties. The LOI of the PP/PAPP/PCAT composite increased to 30.2% and achieved UL-94 V-0 rating when the mass ratio of PAPP/PCAT was 3:1. In cone calorimetry experiments, it was demonstrated to reduce PHRR and THR by 84.7% and 48.9%, respectively. Meanwhile, the PSPR and TSP were also reduced by 77.9% and 56.2%, respectively, relative to PP. This indicates that the PP modified by partially doping PCAT in PAPP has significantly enhanced heat dissipation and smoke suppression performance, thus performing higher fire safety. In terms of FRI, PP/PAPP/PCAT composite was considered to be of “good” flame retardancy. Thermal gravimetric analysis demonstrated that PCAT significantly improved the char yield of PP when combined with PAPP. The morphology and properties of the residue showed that PP/PAPP/PCAT could produce a significant expanded foam insulating carbon layer, and the graphitization degree of the residual carbon was enhanced. The investigation of their water resistance demonstrated that the PP/PAPP/PCAT composite still obtained a UL-94 V-0 rating after 168-h soaking in water.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 31
·18115-18123
·
IF 3.119
Haifeng Zhou,Qunli Tang,Qianer Xu,Yan Zhang,Cong Huang,Yali Xu,Aiping Hu,Xiaohua Chen
Even after a decade of research and rapid development of lithium–sulfur (Li–S) batteries, the infamous shuttle effect of lithium polysulfide is still the major challenge hindering the commercialization of Li–S batteries. In order to further address this issue, a functionalized PP separator is obtained through selective single-sided chemical tailoring, and then organosiloxane fumigation grafting. During the charge–discharge process, the grafted functional groups can effectively block the transportation of the dissolved polysulfides through strong chemical anchoring, inhibit the shuttle effect and greatly enhance the cycle stability of the Li–S battery. Interestingly, the specially designed single-sided enlarged channel structure formed by chemical tailoring can well accommodate the deposition with intermediate polysulfides on the separator surface toward the cathode chamber, resulting in enhanced initial discharge capacity and rate performance. Compared to the battery assembled with PP, the Li–S battery employing the separator grafted with a 3-ureidopropyltrimethoxysilane (PP–Ox−–U) displays better electrochemical performance. Even at 2C, it can still deliver a high capacity of 786 mA h g−1, and retain a capacity of 410 mA h g−1 with a low capacity fading of 0.095% per cycle over 500 cycles. This work provides a very promising and feasible strategy for the development of a special functionalization PP separator for Li–S batteries with high electrochemical performance.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）