JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2016
·Vol. 81
·期 3
·850-858
·
IF 1.473
Chen Peng,Liang Xiaoping,Wang Jun,Zhang Di,Yang Shanmin,Wu Weishan,Zhang Wei,Fan Xiaowei,Zhang Dequan
Abstract To develop high performance mixed matrix gel polymer electrolyte, the synergistic effect of blending PVDF (PEO/PVDF weigh ratio of 85:15) and adding nano-TiO 2 (0.5–2 wt.%) to traditional monomer poly (ethylene oxide) was investigated. Thermogravimetric analysis indicated that poly (ethylene oxide)/poly (vinylidene fluoride) blend had an excellent thermal performance. X-ray diffraction analysis revealed that poly (ethylene oxide)/poly (vinylidene fluoride) blend leads to lower crystallinity and the amorphicity of corresponding gel polymer electrolyte increases with increasing nano-TiO 2 concentration. The maximum ionic conductivity (2.12 × 10 −6 and 6.37 × 10 −6 S/cm) of poly (ethylene oxide)/-(TiO 2 ) 0.5 and poly (ethylene oxide)/poly (vinylidene fluoride)/-(TiO 2 ) 0.5 gel polymer electrolyte at room temperature (25 °C) were obtained, respectively. The prepared poly (ethylene oxide)/poly (vinylidene fluoride)-TiO 2 gel polymer electrolyte demonstrated about 2.6 and 1.8-fold increment in the fracture strength as compared to that of poly (ethylene oxide) gel polymer electrolyte and poly (ethylene oxide)-TiO 2 gel polymer electrolyte. The average transmittance of poly (ethylene oxide)/poly (vinylidene fluoride)-TiO 2 gel polymer electrolyte was about 90 % in the visible region. With good electrical, mechanical and optical performance, it is very suitable for being applied in electrochromic glass. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
WEAR
·
2024
·
IF 5.3
Yanfei Liu,Zhikai Fan,Shengtao Yu,Ruize Zhang,Xiangyu Ge,Wenzhong Wang
MoS 2 –Sb 2 O 3 coating is commonly used as solid lubricant for titanium alloys , but the wear-resistance performance is still limited. Core-shell annealed nanodiamond (AND) particle is used as reinforcement for MoS 2 –Sb 2 O 3 coating on Ti6Al4V substrate treated by plasma electrolytic oxidation (PEO) and laser surface texturing (LST). The incorporation of AND particles into the MoS 2 –Sb 2 O 3 coating results in a 39 % decrease in friction and significantly reduces wear on the composite coating . Structural transformation of AND particles to amorphous carbon and graphitic structure promotes the densification of top-layer coating, enhancing lubrication and wear-resistance. Change of contact stress by PEO-LST promotes the formation of dense tribofilm and re-orientation of MoS 2 . This study has implications for the development of solid lubrication coatings for aerospace applications through functional nanomaterials and targeted designed surfaces.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Congyuan Li,Ping Xue,Lining Chen,Junjie Liu,Zhengbang Wang
Poly(ethylene oxide) (PEO) based polymer electrolytes show great potential as the high energy density , mass-producible, low cost and high safety in the application of all-solid-state lithium (Li)-ion batteries. However, the unsatisfied ionic conductivity due to the high crystallinity of the intrinsic PEO limits its application. In this paper, the composite PEO-based electrolytes with sandwich-like structure have been designed, and the maneuverable heat-assisted process and multi-phase composite in order to suppress the crystallinity of PEO matrix are researched systematically. It's confirmed that the ionic conductivity of composite solid-state polymer electrolytes (CSPEs) after a hot-press process (90 °C, 15 min) reaches 4.9 × 10 −4 S cm −1 at 25 °C. The sandwich structure of CSPEs not only enhances the ionic conductivity over the PEO electrolyte by decreasing the degree of crystallinity, but also enhances the mechanical strength and electrochemical window. Solid-state Li-ion cells fabricated with the CSPEs exhibit excellent and stable cycle performance. The specific capacity of cells is 160 mA h g −1 at 0.2C, and the capacity retention rate is almost 100% after 110 cycles. The Li|CSPE|Li cells could survive steadily for over 1,800 h. In this work, the multi-phase sandwich structure and practical manufacturing heat-assisted methods for CSPEs result in the excellent ionic conductivity, high mechanic strength and low cost of mass production, which offer a guidance on the commercialization of high-performance PEO-based electrolytes.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2020
·
IF 1.738
Wei Liu,Fan Deng,Shufeng Song,Guipeng Ji,Ning Hu,Chaohe Xu
Although all-solid-state batteries have good safety and high energy density, they still need to explore high performance solid-state electrolytes to achieve high ionic conductivity, wide electrochemical window and excellent mechanical properties. In this work, we designed a hybrid solid electrolyte to solve these problems via mixing PEO, ionic liquid EmimFSI (1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide), LLZO (Li6.5Mg0.05La3Zr1.6Ta0.4O12) and lithium salt, which aimed at suppression of PEO crystallization and employed to improve the mechanical and electrochemical stability. Accordingly, the LLZO@EmimFSI@PEO derived hybrid solid electrolyte provides an ionic conductivity of 1.0×10-4 S cm-1 at 40oC and electrochemical stability window above 5.0 V vs. Li/Li+. Furthermore, the symmetric cell of Li/hybrid solid electrolyte/Li exhibits flat voltage profiles and stable lithium plating/stripping process, a solid-state battery based on the hybrid solid electrolyte combined with high-energy lithium metal anode and NCM622 (LiNi0.6Co0.2Mn0.2O2) cathode was also demonstrated.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Sajid Hussain Siyal,Mengjie Li,Hao Li,Jin-Le Lan,Yunhua Yu,Xiaoping Yang
A new composite gel polymer electrolyte (PEO-Bp-LATP) membrane consisting of poly-ethylene oxide (PEO), benzophenone (Bp) and varying amounts of highly ion-conducting lithium aluminum titanium phosphate (LATP) particles was prepared by significant Ultraviolet (UV) technology. The as-prepared PEO-Bp-LATP electrolyte membranes showed improved mechanical properties and superior electrochemical performances in Lithium metal batteries (LMBs). Typically, PEO-Bp-15 wt% LATP showed highest ionic conductivity (σ = 3.3 × 10−3 S.cm− 1 ) at RT, a high Li-transference ( t Li + = 0.77 ) and wider electrochemical stability window (ESW) above 5 V as well as good mechanical strength (9.3 MPa). More significantly, the PEO-Bp-15 wt% LATP membrane has an excellent inhibitory effect on Li dendrite expansion in Li symmetric cells and presents a long term cyclic stability with current density of 2 mA/cm 2 over 1100 h for Li//PEO-Bp-15 wt% LATP //Li. Our results for the measurement of galvanostatic charge-discharge deliver fascinating rate performance at 0.1C. Hence, the present study demonstrates that the UV-irradiated PEO-Bp-LATP membrane can be a promising electrolyte to meet the requirements for the next-generation LMBs.
研究领域:
材料科学
·
储能技术
·
高分子化学
·
电化学
·
锂离子电池
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chang-Chun Sun,Abdulmalik Yusuf,Shao-Wen Li,Xiao-Lin Qi,Yue Ma,De-Yi Wang
Electrochemical performance, mechanical properties as well as fire safety are crucial factors to evaluate solid polymer electrolytes (SPEs). In this article, we purposely choose metal-organic frameworks (HKUST-1 MOFs) as the multifunctional additive to modify the PEO-based SPEs. The PEO-LiTFSI-10HKUST-1 MOFs electrolyte (PL10HM) has shown enhanced ionic conductivity, which reaches 2.4 × 10 −3 S cm −1 at 80 °C. With the HKUST-1 MOFs, the electrochemical stability window and lithium-ion transfer number were largely enhanced as compared to the PEO-LiTFSI electrolyte (PL). The crystal structure, morphology, thermal stability, micro and macro mechanical properties were characterized systematically. The reduction in peak heat release rate (pHRR) of 42% was realized, which means the PL10HM possesses higher fire safety. The as-fabricated Li/PL10HM/LiFePO 4 battery exhibited a simultaneous good rate capability up to 1C and highly stable cyclability for over 100 cycles. These results demonstrate the unique characteristics of such a novel electrolyte membrane, potentially enabling the high performance, safe use in the practical solid-state batteries.
研究领域:
材料科学
·
电化学
·
高分子化学
·
能源存储
·
固态电池
·
功能材料
✓ 已验证
DOI
高影响因子
POLYMER
·
2019
·
IF 3.771
Shufen Zou,Ruihua Lv,Zaizai Tong,Bing Na,Kuan Fu,Hesheng Liu
We report the shape-memory PAA/PEO blends where in situ hydrogen-bonding complex and the excess PEO component serve as elastomer and switching element, respectively. The hydrogen bonding interactions between PAA and PEO are responsible for in situ PAA/PEO complex formation. The in situ PAA/PEO complex, water insoluble and highly elastic, is well interpenetrated with the excess crystalline PEO component to produce bi-continuous phase morphology. As a result, the blends ( wt PAA / wt PEO = 0.1 : 1 and 0.2 : 1), consisting of sufficient amount of in situ complex and the excess highly crystalline PEO, exhibit superior shape memory effects with a fixing and recovery ratio of nearly 100%.
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
·
2014
·Vol. 4
·期 32
·16731-16738
·
IF 3.708
Yuanyuan Zhou,Pengwei Qi,Zhihua Zhao,Qian Liu,Zhongjun Li
Fibrous composites of hydroxyapatite (HAP)/polyvinylpyrrolidone (PVP)/polyethylene oxide (PEO) with good mechanical properties were successfully prepared by a sol-electrospinning process. As HAP nanoparticles could not disperse well in polymer aqueous solution, a modified procedure was presented to firstly prepare HAP sol. The PVP and PEO polymers were then directly dissolved in the HAP sol solution for electrospinning, which was based on completely miscible solutions. The morphology and structure of the electrospun fibrous composites were investigated by XRD, SEM, TEM and FTIR. It was of interest to observe that large numbers of HAP nanoneedles were preferentially oriented parallel to the longitudinal direction of the electrospun PVP–PEO nanofibers when a relatively small amount of HAP was used. When there was a large amount of HAP, the agglomeration of needle-like HAP particles could stretch out of the fibers. This could reduce the electrical charge carried by the liquid jet, and make some agglomerated HAP particles randomly arrange on the edge of the jet, with the result that some protuberances existed on the surface of the fibers. Mechanical testing demonstrated that the incorporation of HAP into the PVP–PEO matrix led to significantly better tensile properties compared to those of the pure electrospun polymer membrane, and the incorporation of 60 wt% HAP into the matrix of PEO–PVP nanofibers led to a higher tensile strength of 19.20 ± 0.09 MPa and a percentage of elongation of 11.64 ± 0.31%, respectively. Based on the study, the combination of PVP–PEO and HAP could be promising for application as scaffolds for bone tissue engineering.
研究领域:
生物材料
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Tao Liu,Zhuoran Zhang,Jiacheng Liu,Peijie Dong,Feng Tian,Fan Li,Xin Meng
Development of chitosan-based hemostatic products and their application in wound healing has always been a research hotspot in the field of emergency treatment and biomedicine . In this study, the classic hemostatic chitosan and the most well-known inorganic hemostatic agent—kaolin were tried to combine to form a more excellent dressing. Together with the aid of non-toxic, harmless and good hydrophilic polyethylene oxide, chitosan/polyethylene oxide (PEO)/kaolin nanofiber membranes (CPKs) were prepared by electrospinning technology. Such membranes exhibited adjustable mechanical properties and good biocompatibility. Furthermore, a series of in vitro coagulation experiments proved that CPKs with 10 % ratio of kaolin (CPK10) has excellent hemostatic ability. Especially, in the whole blood coagulation time (WBCT) assay, the hemostatic time of CPK10 (43 ± 1.4 s) was significantly lower than that of chitosan/polyethylene oxide (CPK0) nanofiber membrane (61 ± 2.2 s) and QuikClot® Combat Gauze (55.7 ± 1.2 s). The further rat liver injury test reconfirmed that CPK10 can stop bleeding better and faster compared to other groups. In addition, CPKs could promote back wound healing in rats within 14 days without significant inflammatory response. This safe and effective hemostatic CPKs is expected to be a promising candidate hemostat in pre-hospital medical care.
研究领域:
生物医学
·
急诊治疗
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Boyang Huang,Pengbin Lai,Haiming Hua,Ruiyang Li,Xiu Shen,Xueying Yang,Peng Zhang,Jinbao Zhao
The application of PEO-based solid polymer electrolyte (SPE) is limited by the low ionic conductivity and lithium-ion transference number near room temperature . In this paper, a pendant polyether poly (EO- co -PCGE) (PECP) with low molecular weight is prepared by copolymerization of ethylene oxide (EO) monomer with typical lithium-ion conduction group and propylene carbonate glycidyl ether (PCGE) monomer with high dielectric group. By blended with PECP, the PEO-based SPE is obtained and its ionic conductivity can be increased to 3.54 × 10 −5 S cm −1 at room temperature and 1.32 × 10 −4 S cm −1 at 40 °C. In one aspect, the pendant structure and low molecular weight are beneficial to the reduction of the crystallinity of PEO matrix; in a further aspect, the cyclic carbonate pendant offers a competitive effect on segmental motion and the lithium-ion complexation of PEO , thus affecting the conduction mechanism of lithium-ions in the conventional PEO-based SPE and significantly increasing the lithium-ion transference number. The synergistic effect of these two aspects makes the prepared PEO-based SPE have excellent properties of ionic conduction especially at room temperature, and the LiFePO 4 /Li batteries with the SPE present excellent cycling performance at the temperature of 40 °C with a discharge capacity of about 100 mA h g −1 after 150 battery cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 9
·3075-3084
·
IF 2.5
Ahmed Adnan,Zhang Meng,Li Siqi,Xu Lan
Chitosan (CS), as a biocompatible and biodegradable nature polymer, has excellent antibacterial property. Poly(ethylene oxide) (PEO), as a biomaterial with thermal stability, biocompatibility and biodegradability, has good spinnability. Anthocyanin, as a natural colorant agent with different molecular structures under different pH values, has good antibacterial and antioxidant properties and can be applied as a pH indicator. Electrospun nanofiber membranes (NFMs) show great application prospects in food packaging due to their unique structural and functional advantages. In this work, anthocyanin/CS/PEO nanofiber membranes (NFMs) for food packaging were batch prepared by the spherical section free surface electrospinning (SSFSE), and their yield reached 5.8 ± 0.4 g/h. The morphology, structure and properties of CS-based NFMs were explored, which showed that they were hydrophilic and had excellent antibacterial activity against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). Among them, anthocyanin/CS/PEO NFMs exhibited better mechanical properties and high antioxidant activity. Furthermore, the color changes of anthocyanin/CS/PEO NFMs at different pH values were investigated, illustrating that they could be used as a visual monitoring food packaging, and their application effects in beef storage were studied.
研究领域:
材料科学
·
食品科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Pengyuan Dong,Qiang Deng,Qimeng Zhang,Changdong Chen,Chenghao Yang
The garnet-type solid electrolyte Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) was modified with a cationic surfactant Cetyltrimethylammonium Bromide (CTAB) to improve the dispersion of LLZTO inorganic particles in Poly (ethylene oxide) (PEO) electrolyte (PEO-LLZTO@CTAB) by a liquid phase casting method. During fabrication, the cationic modifier CTAB is uniformly adsorbed on the surface of LLZTO particles, which can effectively reduce their surface energy and lead to a thin CTAB surface coating layer. This fabricated PEO-LLZTO@CTAB can avoid the aggregation of LLZTO particles in the composite solid-state electrolyte (CSSE) and improve the interfacial contact at the PEO/LLZTO interface, thus reducing the overall resistance of PEO-LLZTO@CTAB/Li half-cell and inhibiting the dendrite growth during cycling. The all-solid-state batteries (ASSBs) with LiFePO 4 (LFP) as the cathode, PEO-LLZTO@CTAB as the electrolyte and Li as the anode exhibit a high initial discharge capacity of 146.6 mAh-g −1 , excellent rate performance and high-capacity retention of 91.0 % after 300 cycles at 0.2 C multiplier and 60 °C within the voltage range of 2.7–4.0 V.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）