CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Liyuan Liu,Guanfu Liu,Shibo Wu,Jiahao He,Yang Zhou,Muslum Demir,Ruona Huang,Zijin Ruan,Guohua Jiang,Pianpian Ma
Sr-based perovskites represent enormous potential as supercapacitor electrode materials. However, the wide-temperature supercapacitor application for perovskite-based electrodes has not been studied yet. Thus, there is a pressing need for comprehensive research and investigation in the wide-temperature range to unlock the full capabilities of Sr-based perovskite and pave the way for its successful integration into versatile supercapacitor systems. In this study, SrCo 1- x Fe x O 3-δ ( x = 0.05, 0.10, 0.15 and 0.20) were synthesized by solid-state sintering method, as oxygen-intercalated electrode materials for wide temperature-tolerant supercapacitors. SrCo 1- x Fe x O 3-δ contains orthogonal and monoclinic phases for x = 0.05 and x = 0.10, and a stable monoclinic phase can be obtained when the substitution amount is at least 15 %. The best electrochemical performance was obtained in x = 0.10, with a specific capacitance of 526.6 F g −1 at 1 A g −1 . This can be attributed to the lowest resistance and richest oxygen vacancies of SrCo 0.9 Fe 0.1 O 3-δ , which are conducive to oxygen-intercalated energy storage. The SrCo 0.9 Fe 0.1 O 3-δ @CC//AC@CC supercapacitor device displays a working voltage of 1.6 V and a stable long-term cycle life with 85.71 % capacity retention after 5000 cycles. Furthermore, the temperature-dependent electrochemical characterization indicates an improvement of electrochemical performance for both electrode and device as temperature increases, which may be ascribed to the enhanced ion migration in the electrolyte. From 0 to 85 °C, the specific capacitance of SrCo 0.9 Fe 0.1 O 3-δ @CC electrode increases from 91.8 to 1035.9 F g −1 at 1A g −1 , and the energy density of the device also increases from 7.6 to 26.2 Wh kg −1 when the power density is 800 W kg −1 .
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 SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·Vol. 110
·期 3
·678-689
·
IF 2.3
Hou Ruiting,Wang Shaozheng,Wang Haishan,Tian Lanlan,Zhu Xiangxiang,Li Yule,Chen Qingming,Zhang Hui
La 1- x Ca x MnO 3 , as a candidate for thermal radiation detectors, has received more attention due to the quest for a higher temperature coefficient of resistance (TCR), however, the narrow high-TCR temperature range greatly limits its application in uncooled bolometer. In this paper, Mn 3 O 4 - La 1- x Ca x MnO 3 ( x = 0–0.33) composite ceramics were prepared using the sol-gel method. A suitable TCR was achieved over a wide temperature range, including room temperature, by adjusting the Ca content. As the Ca content decreased, the resistivity ( ρ ) of the composite gradually increased at 300 K, and the positive TCR (PTC) peak shifted to a lower temperature. However, the negative TCR (NTC) was enhanced over a wider temperature range. When x = 0.05, the maximal NTC was −3.2%·K −1 within the range of 172 K–350 K and |TCR| > 2%·K −1 , spanning a large temperature range around 180 K, including room temperature. These results strongly indicate that the composite, such as Mn 3 O 4 - La 1- x Ca x MnO 3 , provides a new idea for uncooled bolometer/night vision. Graphical Abstract
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2023
·
IF 5.5
Yu Zhang,Junming Dai,Hua Lai,Yinhua Wan,Young Moo Lee,Yongbing Zhuang
The development of proton exchange membrane fuel cells (PEMFCs) that operate over a wide temperature range without additional humidification systems remains challenging. In this work, wide-temperature-range proton exchange membranes (PEMs) were constructed from novel Tröger’s base (TB)-based intrinsically microporous copolyimides (co-PIs) finely adjusted by incorporating crown ether units into chain backbones. Owing to the strong siphoning effect of existing microporosity and hydrogen bonds or the acid–base interactions of crown ether and TB units with phosphoric acid (PA) and/or H2O, the PA-doped co-PI membrane electrode assemblies (MEAs) can easily operate stably from 30 to 160 °C under H2/air conditions even without any external humidifiers. Regarding its single-cell performance, PI-TB-N30C achieved maximum power densities of 250 and 361 mW cm–2 at 80 and 160 °C, respectively, under anhydrous conditions. In addition, PA-doped co-PI MEA can accomplish long-term stable operation under low or high temperatures for 120 h. The structural architectures for PEMs based on finely adjusted microporous co-PIs extend beyond the current capabilities of existing PEMFCs.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2021
·Vol. 11
·期 39
·2101855
·
IF 29.368
Liang Tan,Xuexia Lan,Jinwei Chen,Hanyin Zhang,Renzong Hu,Min Zhu
Lithium-ion batteries (LIBs) suffer dramatic energy reduction, and are even unable to safely charge below -10 °C, due to sluggish Li + transport kinetics in the anode, electrolyte and solid electrolyte interphase (SEI), as well as large overpotential which causes Li plating on the anode surface. Herein, a SnO 2 -LiF-graphite (SLG) composite anode is developed for wide temperature application. The SLG with a propylene carbonate electrolyte delivers a stable capacity of more than 900 mA h g −1 at 60 °C with 100 mA g −1 , maintaining 823.9 mA h g −1 at -10 °C. When matched with a tetrahydrofuran-based electrolyte, the SLG delivers stable capacities of 780.4 mA h g −1 at -40 °C and 637.2 mA h g −1 at -50 °C, respectively. It is demonstrated that the LiF-induced inorganic-rich SEI maintains the nanostructure of the active Sn, and that their interfaces with the electrolyte are highly stable. Furthermore, the formation of α-Sn with higher Li + diffusion kinetics results in a very small overpotential (≈0.18 V) of lithiation for SLG from 30 °C to -50 °C. This work shows that LiF-modified SnO 2 anodes matched with suitable electrolytes can qualify the LIBs for a safe and long-life at wide temperature, which is helpful to further promote these batteries for low-temperature applications.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zijian Gao,Shengyu Sun,Xin Guan,Yongqi Yang,Jian Sun,Hailun Ren,Zhaohui Jin
Ensuring adhesion over wide temperature range is of considerable significance for hydrogel-based wearable sensors, especially in extreme environments. In this research, a hydrogel with adhesive properties over a wide temperature range (−20–80°C) was prepared by copolymerizing 2-acrylamido-2-methylpropanesulfonic acid (AMPS), acrylic acid (AAc), and sodium lignosulfonate (LS) in binary solvent of H 2 O and glycerol (Gly). Hence, the hydrogel acquires adhesive properties through the establishment of non-covalent interactions with the substrate surface, encompassing hydrogen bonding, metal complexation, and electrostatic interactions. At −20°C, ambient temperature (20°C), and 80°C, the hydrogel exhibits significant shear strength of 39.8, 74.3, and 46.9 kPa. In addition, chemical crosslinking points, hydrogen bonding and electrostatic interaction are imparted with good mechanical properties to withstand large tensile and flexible deformation, achieving a fracture stress of 120 kPa and a strain of 14,288%. Furthermore, the hydrogel exhibits outstanding electrical conductivity, reaching up to 1.58 S/m owing to a substantial concentration of free conductive ions. Moreover, this sensor is able to provide a constant and stable change in electrical resistance signal and is used to monitor human movement signals. This makes it possible to employ AAc/AMPS/H 2 O/Gly/LS hydrogels as wearable flexible sensors in extreme environments.
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
·
2021
·
IF 5.316
Hongxia Chen,Bin Liu,Ya Wang,Hao Guan,Hongming Zhou
Spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) cathode with high voltage plateau at around 4.7 V (vs. Li/Li + ) has attracted great attention. However, the lack of suitable electrolyte hinders its application. Although lithium difluoro(oxalate)borate (LiODFB)-based electrolyte has been proved to be suitable for high voltage electrolyte, traditional LiODFB-based electrolyte has poor low and high temperature performance. Therefore, we confirm that lithium difluorophosphate (LiPO 2 F 2 , LiDFP) as LiODFB-based electrolyte additive and dimethyl sulfite (DMS) as co-solvent significantly improve electrochemical performance of LNMO/Graphite full batteries at low and high temperature. Various physical and electrochemical techniques are used to investigate the effect of four electrolytes. The effect on cathode is mainly attributed to priority oxidation decomposition of LiDFP. The formed interface film can inhibit the dissolution of Mn 2+ , thereby improving the high temperature electrochemical performance. The effect on anode is that the interface film formed by LiODFB prevents continuous reduction of solvents and additive. The enhanced low temperature performance is due to the significantly increased ionic conductivity of DMS-containing electrolytes at low temperature. Besides, the formed of the cathode electrolyte interphase (CEI) membrane with low impedance by LiDFP can improve the kinetics of cathode/electrolyte interface, therefore enhancing the low and high temperature performance of LNMO/Graphite full cells.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 9
·2119-2126
·
IF 5
Ran Chen,Liang Zhao,Yannanqi Li,Jian Li,Pei Chen,Xinbing Chen,Zhongwei An
A series of tolane liquid crystals terminated by but-3-enyl with high performance (such as high clearing point, low melting point, high birefringence Δn, low viscosity γ1, and broad nematic phase interval) were designed and synthesized in accordance with the phase-only liquid-crystal-on-silicon (LCoS) device requirements for AR displays. The effects of the lateral fluoro-substituent, central alkyne bond, terminal group, and flexible n-alkyl chain on the thermal properties were systematically investigated, and density functional theory (DFT) calculations of molecular conformation and aspect ratio were used to corroborate the experimental results. Further, their properties of phase transition temperature, birefringence, and viscosity were comprehensively evaluated in two typical LC mixtures (001, P02-F). The results indicate that our target compounds can effectively lower the melting point, broaden the working temperature interval, and maintain a high Δn and low γ1 for three LC mixtures. One new LC mixture by employing compound 2TFV as a LC dopant exhibited a high Δn (∼0.26), moderate γ1 and dielectric anisotropy (∼6.3), and broad temperature adaptability (−31.3 °C to 91.3 °C), and achieved 2.08π phase modulation, 5 V operation voltage, and 2.89 ms response time at 40 °C in a reflective LCoS device.
研究领域:
材料科学
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显示技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yan He,Jinpeng Guo,Chuanchuan Bi,Zhifei Hao,Bin Zhao,Chunping Li,Xiaogang Han,Qi Wang
Composite polymer electrolytes (CPE) have attracted considerable attention due to their potential to achieve high flexibility and large energy density. However, their practical application is hampered by their suitability at a single temperature and severe lithium dendrite growth. In this work, we have doped the perovskite inorganic filler LaCoO 3 into polyamide (PI) nanofibers and constructed a LaCoO 3 /PI/PVDF CPE. Electrochemical characterization of the CPE and density functional theory calculations performed for it show that perovskite nanofibers have abundant oxygen vacancies, which are conducive to accelerating the dissociation of lithium salts and releasing more free lithium ions. Li//Li symmetric batteries exhibit excellent long cycle performance (over 3000 h) at 30 °C, and LiFePO 4 //Li batteries exhibit excellent cycling performance with over 1000 cycles at (0.5 C, 30 °C) and 400 cycles at (0.2 C, 60 °C), which can be realized with high voltage cathode NMC 811. The physical properties of the CPEs are also quite outstanding, with good thermal stability as it can withstand a high temperature of 200 °C and tensile strength up to 12.01 MPa. This work presents a new idea for designing CPEs with high safety and excellent electrochemical properties, which can provide stable circulation over a wide temperature range.
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 POWER SOURCES
·
2025
·
IF 7.9
Jun Han,Changchun Fan,Dian-sen Li,Lei Jiang
The application of conductive polymer hydrogels in flexible energy storage devices has gained a great deal of attention. In this paper, the hydrogel integrating water retention and antifreeze properties is realized by the organic binding of polyvinyl alcohol (PVA) chains and NaClO 4 . The composite hydrogel is assembled with MnO 2 /carbon fiber and activated carbon fiber to constitute a flexible quasi-solid-state supercapacitor. The capacitor can cycle 25,000 times with the capacitance retention of 81 % when exposed directly to the external environment. In addition, the capacitor can store charge consistently and stably between −40 °C and 40 °C. This demonstrates the excellent environmental stability of the composite gel, which ensures stable operation of the device under extreme conditions. Excitingly, the mechanics of PVA composite gel electrolyte can be dynamically coordinated using the Hofmeister effect. The longer the flexible quasi-solid supercapacitor is soaked in 1.5 M Na 2 SO 4 solution, the stronger the mechanical properties are. There are new thoughts in engineering new flexible supercapacitors with this biological compatibility and multi-functional conductive hydrogel.
研究领域:
材料科学
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能源存储
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 52
·13161-13171
·
IF 5.236
Chunxiao Chai,Mengjiao Yi,Zhuo Zhang,Zhaohui Huang,Qi Fan,Jingcheng Hao
Graphical High stretchability (more than 1000 %) and conductivity (0.67 S/m) emulsion gels were fabricated from emulsions and the introduction of glycerol endowed them with broad operating temperature (−20 to 90 °C). The emulsion gel based strain sensors showed high sensitivity (gauge factor=6.240), fatigue resistance, self-healing and adhesion properties, realizing the repeatable and accurate detection of full-range human motions. Hydrogels with mechanical elasticity and conductivity are ideal materials in wearable devices. However, traditional hydrogels are fragile upon mechanical loading and lose functions in climate change because the internal water undergoes freeze and dehydration. Herein, we synthesize stable emulsions at high and low temperatures by introducing glycerol into the W/W emulsions. Then the high-stable emulsions are used as templates to produce the freestanding emulsion gels with enhanced mechanical strength and conductivity. The introduction of glycerol endows emulsions and emulsion gels with high and low temperature resistance (−20 to 90 °C). The fabricated strain sensors based on emulsion gels show high sensitivity (gauge factor=6.240), high stretchability (1081 %), fatigue resistance, self-healing and adhesion properties, realizing the repeatable and accurate detection of various human motions. These high-performance and eco-friendly emulsion gels can be promising candidates for next-generation artificial skin and human-machine interface.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Ziyan Yuan,Fuyu Xiao,Yixing Fang,Peixun Xiong,Xiaoli Sun,Xuehui Duan,Xuhui Yang,Haosen Fan,Mingdeng Wei,Qingrong Qian,Qinghua Chen,Lingxing Zeng
Designing cathodes with long service life, remarkable rate capability and all-climate workable is crucial to improve the performance of aqueous zinc-ion batteries (AZIBs). Herein, we constructed a vanadium dioxide/graphene oxide (VO 2 (B)/GO) sample that combines VO 2 with GO through hydrothermal route and can simultaneously provide rate capability. VO 2 (B)/GO is rich in oxygen vacancies , which weakens the electrostatic force , and GO prevents vanadium oxidation . Density functional theory (DFT) calculations elucidate oxygen vacancies can offer more storage sites with increased reaction kinetics. The electrode exhibited a high reversible capacity of 423 mAh g −1 at 0.5 A g −1 and preserved long-life cycling properties at 15 A g −1 . The presence of oxygen vacancies and GO can contribute to the excellent performance and prevent the structure of VO 2 from collapsing during cycling. We successfully lit up commercial light-emitting diode (LED) lights with a VO 2 (B)/GO electrode. In addition, VO 2 (B)/GO exhibits excellent performance in all-climate conditions (-15-60 °C). This combinatorial design strategy provides a broadly applicable approach for durability and all-climate workable batteries .
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2019
·Vol. 65
·期 10
·e16684
·
IF 3.463
Lei Song,Kui Ma,Wen Tian,Junyi Ji,Changjun Liu,Siyang Tang,Wei Jiang,Hairong Yue,Bin Liang
A novel FeTiSO x catalyst prepared by a simple hydrolysis coprecipitation method was used for the selective catalytic reduction (SCR) of NO x with NH 3 , which exhibited high catalytic activity (NO x conversion of >97% and N 2 selectivity of >95%) and tolerance for both H 2 O and SO 2 at a broad temperature window of ~325–475°C. The characterization results showed that the formation of Fe–O–Ti and Fe–O–S species could significantly enhance the acidic sites of the catalyst, which play an important role in NH 3 absorption and their catalytic activity. The Fe 3+ ions in the bulk anatase TiO 2 could significantly enhance the redox properties for the SCR reaction and suppress the side reaction of NH 3 oxidation to NO or N 2 O. In addition, the reaction mechanism was discussed based on in situ diffuse reflectance infrared Fourier transform spectroscopy measurements and kinetic investigation, indicating that the reaction was dominated by the Eley–Rideal mechanism over the FeTiSO x catalyst.
研究领域:
环境科学
·
催化化学
✓ 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）