Journal of Energy Storage
·
2025
·
IF 9.8
Kai Zhou,Yuzhou Zhu,Jianhua Zhou,Fengxiang Zhang,Haihui Jiang,Libin Liu,Ligang Gai
Electrolyte is the determining factor for whether electrochemical energy-storage systems using aqueous electrolytes can operate in all-temperature environments. In this contribution, we present a type of H 3 PO 4 –ethylene glycol–H 2 O proton conducting electrolyte that enables aqueous electrochemical capacitors to operate within a temperature range of −60 to 140 °C, representing the widest operating temperature window of aqueous electrolytes to date. The physicochemical properties of the electrolytes are characterized. Using the designed electrolytes, the electrochemical properties of symmetric electrochemical capacitors based on GaN and graphite electrodes are evaluated at full temperature (−60–140 °C), respectively. The volume ratio of ethylene glycol to water is optimized, and the conduction mechanism of protons is discussed. Compared with the base electrolyte (52 wt% H 3 PO 4 aqueous solution), the addition of ethylene glycol improves the freezing resistance, electrothermal stability, and wettability of the electrolyte, thereby reducing the equivalent series resistance and improving the electrode kinetics and rate performance of the electrochemical capacitors. The improvement of electrochemical performance of electrochemical capacitors by the designed electrolytes is verified through theoretical calculations.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
An Liu,Ning Chen,Ping Liu,Geng Zhang,Xiyao Liu,Chao Ma,Song Gao
For realizing friction reduction and wear resistance across a wide temperature range, this study proposes a novel interface structure combining micro-arc oxidation (MAO) coatings on titanium alloy with MoSe 2 nanoparticles. Focus on investigating the tribological behavior of this structure across a wide temperature range (RT–500 °C) and its response to temperature. Through detailed characterization, the friction-reducing and lubricating mechanisms during wear were elucidated. The results demonstrate that this structure consistently exhibits friction reduction and lubrication capabilities, with low-shear MoSe 2 particles and molybdenum oxides enhancing the micro-pocket structure. This research provides valuable insights for developing integrated self-lubricating interfaces and improving the high-temperature tribological performance of MAO coatings.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
High Voltage
·
2023
·
IF 4.4
Xu Yang,Hong Zhao,Chengcheng Zhang,Chunyang Li,Xindong Zhao,Jiaming Yang,Xuan Wang
To enhance the DC electrical performance of cross-linked polyethylene (XLPE), the graftable antioxidant methacrylic acid 2-hydroxy-3-(4-anilinoanilino) propyl ester (GA), which contains carbonyl and amino groups, and the crosslinking coagent trimethylolpropane trimethacrylate (TMPTMA), which contains carbonyl groups, are individually or co-grafted onto XLPE. The slightly higher deep trap density introduced by higher grafting concentration of TMPTMA results in more significant suppression effect of conductance current and enhanced breakdown strength at a lower temperature, while the suppression effect for the conductance current at 90°C becomes weakened due to limited trap energy. Meanwhile, the deeper energy level introduced by GA suppresses the conductance current and improves the electrical strength of XLPE at 90°C more significantly. By co-grafting, the conductance current of XLPE in a wide range temperature can be significantly reduced, especially for the temperature dependence of conductance current, which is beneficial to suppress the field strength reversal. The results of thermally stimulated current and molecular simulation show that the polar groups of two monomers introduce deep charge traps in XLPE. The co-grafting system ensures the rationality of the crosslinking reaction kinetics and does not affect the cable manufacturing.
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
POLYMER
·
2024
·
IF 4.1
Lin Zou,Xiang Liu,Hongmin Liu,Xiaozhen Zhang,Eric Euchler,Chuntai Liu,Baobao Chang
To get strong and anti-freezing hydrogel with multiple contact and non-contact sensing performance, a facial method is proposed in this work using multiple physical bonding crosslinking and glycerol (GL) immersing strategy. The obtained hydrogels show a tensile stress at break of 5.4 MPa, an elongation at break of 1420 %, and a compression strength of 12.2 MPa at 80 % strain. Additionally, benefiting from the GL immersing the hydrogel shows superior anti-freezing (no ice formation at −60 °C) and water retention ability (water loss less than 17 % after storing at 50 °C for 7 h). Furthermore, the volume resistance of hydrogels exhibits excellent responses against humidity, temperature, strain, and stress. The variation of the resistance against temperature can be well described by the Arrhenius equation with an activation energy of 501.3 meV, verifying a band-gap dominated diffusion hopping conductive mechanism of the hydrogel. The sufficient humidity and temperature responses make the hydrogel applicable as a non-contact sensor, and the wide temperature strain sensing (−40 to 50 °C) and stress sensing capability ensures that the hydrogel can be used as a contact sensor, ensuring that the hydrogel can be used as perfect flexible sensor for monitoring human motion and physiological signals.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Ruifeng Wu,Zhilong Fu,Yafei Liu,Yaxin Wei,Hao Sun,Aimin Chang,Bo Zhang
The entropy engineering strategy has been used for the first time to improve the grain boundary (GB) barrier of CaCu 3 Ti 4 O 12 (CCTO) ceramics, in order to solve its nonlinear problem at around 300 ℃ and expand its application in the field of high-temperature thermistors . To achieve this goal, we prepared (CaBaEuZnSr) 0.2 Cu 3 Ti 4 O 12 (CBEZSCT) high-entropy ceramics, and the GB spontaneous segregation properties were exploited to improve the GB resistance of CBEZSCT ceramics. The results show that the GB activation energy of CBEZSCT high-entropy ceramics (0.87 eV) is higher than that of CCTO ceramics (0.7 eV), which linearizes the resistance temperature curve and extends the application temperature limit from 300° to 750 °C. The proposed method of using a high entropy strategy to tune the GB resistance of CCTO to optimize its performance is highly effective, thus providing a new way of thinking about studying high-performance CCTO materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
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IF 2.196
Yibo Fang,Wenjie Guan,Kangli Bao,Yanzhi Wang,Xiaohong Han,Guangming Chen
The vapor–liquid equilibria (VLE) data of R1234yf + NMP and R1234yf + DMETrEG were measured at the temperature range of 293.15–353.15 K in a dual cycle experimental apparatus. The thermodynamic consistency of the VLE data was checked with an area test. The VLE data were correlated by the nonrandom two-liquid model, and the results showed that they had a good agreement. The average relative deviation of pressure for R1234yf + DMETrEG was within 1.37% and its maximum was 3.51%; the average relative deviation of pressure for R1234yf + NMP was within 1.43% and its maximum was 3.65%. The results still showed that there was a large positive deviation between the binary system R1234yf + NMP and Raoul’s law, and the system R1234yf + DMETrEG exhibited a slight positive deviation to the ideal solution.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2019
·Vol. 40
·期 11
·1-11
·
IF 0.853
He Yijian,Cao Chao,Xu Jiachen,Sun Yue,Chen Zepeng,Chen Guangming
Aqueous LiCl solutions are typical desiccants. Specific thermal capacity data, covering the temperatures range from 233.15 K to 343.15 K and salt mass fractions ranging from 0.15 to 0.45, have been obtained experimentally. The correlating equation proposed reproduces these experimental data with an average absolute deviation of 0.35 %, and a maximum absolute deviation of 1.15 %. Experimental data from the literature, and theory-based calculations, are reproduced by the new equation with a maximum deviation of 16.13 %, and 10.77 %, respectively.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2019
·
IF 0.559
Yuzhen Zhao,Yang Zhao,Zhun Guo,Zongcheng Miao
For wider temperature blue-phase liquid crystal (BPLC), the optimized structures of blue-phase liquid crystal with 4′-(6-amino-hexyloxy)-biphenyl carbonitrile modified graphene oxide (GOre-LC) platelets were discussed in this article. It was shown experimentally that the blue-phase stability was enlarged based on the doping GOre-LC, a stable blue-phase with a wide temperature range (4.9 °C) was obtained, and a peculiar optical texture of the BP I phase was observed.
研究领域:
材料科学
·
液晶物理
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Anna Bao,Xiang Sun,Paul Joseph,Meiling Zhong,Ri-Chao Zhang
In this work, we report on a successful method to fabricate phenyl silicone rubber (P-SR)/graphite composites, with superior viscoelastic properties over a wide temperature range, through an open roll mill mixer. The results obtained showed that the viscoelastic property of P-SR was greatly improved by the incorporation of graphite, as evidenced by the increases in tan δ of composites with the loading of graphite. Specifically, the effective damping temperature ranges of composites with the tan δ > 0.3 can reach 280°C for the 60 parts per hundred rubber (phr) graphite loadings. While the damping temperature ranges of the pure P-SR were only 30°C, thus showing that the incorporation of graphite can greatly improve the viscoelastic property of P-SR. Moreover, the tensile stress strength and elongation at break of the composites were found to be significantly improved compared to the pure P-SR. The enhancements in the properties can be attributed to a greater degree of homogeneous dispersion of the graphite in the composite matrices.
研究领域:
材料科学
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lang Bai,Jiangmin Jiang,Xingchen Li,Yuqing Zhang,Lei Zhang,Lingbang Qiu,Libo Wang,Yanhua Cui,Quanchao Zhuang
Fluorinated carbon (CF x ) is considered to be a promising cathode material for lithium primary batteries, which has an ultra-high theoretical energy density of 2180 Wh kg −1 . However, the C-F bonds in CF x materials are strongly covalent, leading to a low intrinsic conductivity and poor electrochenical performance. In this work, a high entropy electrolyte (HE) has proposed to maintain the original discharge platform and exhibit a second discharge voltage platform that appeared around 1.7 V, which effectively improves the specific capacity of Li/CF x batteries (1035 mAh g −1 ). This significant improvement can be attributed to the chelation of the dioxygen atoms in the solvent with the Li + , resulting in the solvated Li + being co-intercalated into the lamellar structure of the graphite. Notably, the Li/CF x batteries in the HE electrolyte exhibit higher specific capacity than the single lithium salt at −40 °C and 80 °C (539 mAh g −1 , 1132 mAh g −1 ). This is mainly due to high entropy changes the point of the electrolyte solidifies, thus avoiding capacity loss caused by solid-phase electrolyte clogging the electrode holes. This work provides an efficient and reliable method for the design of Li/CF x batteries with high specific capacity.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Chen Wang,Feng Wu,Yanfeng Sui,Guoxiong Wang,Tielin Wang,Jiayu Ma
The solubility of K2SiF6 in MgCl2 and FeCl3 solutions within a temperature range between 20 and 70 °C was experimentally determined by the static method under atmospheric pressure. The equilibrium solids obtained under various conditions were analyzed by XRD, SEM, and FTIR to confirm the stability of corresponding solid phases. The solubility of K2SiF6 in MgCl2 and FeCl3 solutions increased with increasing temperature and concentration, and K2SiF6 remained stable in MgCl2 and FeCl3 solutions. Moreover, the experimental data were successfully correlated with the Apelblat empirical equation. The thermodynamic properties of the solution process, including the Gibbs energy, enthalpy, and entropy, were calculated by the van’t Hoff analysis and the Gibbs equation. The dissolution process of K2SiF6 in the measured solutions was found to be endothermic and nonspontaneous. The findings above can provide fundamental data and theoretical support for optimizing the crystallization of K2SiF6 in acid leaching solution from phosphorus–potassium associated ore and preventing scale formation of K2SiF6 in wet-process phosphoric acid (WPA) vacuum filtration.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY LETTERS
·
2025
·Vol. 73
·期 2
·1-16
·
IF 3.3
Fan Junjing,Shen Yan,Liu Ye,Qu Jinghao,Liu Jie,Yu Baihong,Xu Jiujun
Aminoguanidine-based ionic liquid which can reduce the friction coefficient and wear depth has been developed as lubricant additives for the piston ring and cylinder liner within 80–240 °C. The friction coefficient and wear depth reduction become more significant as the temperature increases. At 240 °C, the coefficient of friction decreases by 23.1% compared to fully formulated mineral based engine oil (FFO). The wear depth of the piston ring and cylinder liner decreases by 9.1% and 16.0%, respectively. Addition of aminoguanidine-based ionic liquid (AO-IL) promotes the tribo-chemical reaction of zinc dialkylphosphorodithiloate (ZDDP), distributing S, P and Zn on the cylinder liner honing platform rather than in the honing groove. The plastic deformation causes a significant reduction of flakes on the edges of the cylinder liner honing platforms and less furrow damage along the sliding direction. The worn surface of the diamond-like carbon (DLC) piston ring shows a denser distribution of white bright spots and a higher sp 2 C=C/sp 3 C–C ratio.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）