JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Junying Yin,Xin Xu,Sen Jiang,Yue Lei,Yunfang Gao
Solid-state lithium metal batteries (SSLMBs) with high safety and high energy densities draw widespread attention in recent years. Nevertheless, the intrinsic defects of the solid-state electrolyte (SSE) such as the poor compatibility with electrodes and low ionic conductivity hamper the application of SSMLBs. Herein, we introduce rigid two-dimensional hexagonal boron nitride (BN) nanosheets and flexible One-dimensional aramid nanofibers (ANFs) as bi-nanofillers into the polyethylene oxide (PEO)-based SSEs to fabricate a composite solid-state electrolyte (CSE) ANF-PEO-BN with network structure boosting the comprehensive performance of SSMLBs. ANF and BN with special properties and structures are prone to be dispersed homogeneously in the PEO matrix to build the ANF-PEO-BN electrolyte, whose rigid and flexible network structure ensures the formation of Li dendrites inhibited. Furthermore, the dissociation of lithium bis(trifluoromethanesulphonyl)imide (LiTFSI) is promoted and more ion transport channels are provided due to the strong affinity between Lewis acid centers of ANF/BN and Li + /TFSI − . As a result, the LiFePO 4 /Li batteries deliver high-capacity retention of 86% after 500 cycles and Li/Li cells stably cycle beyond 3300 h with small overpotential of 10 mV at 0.1 mA cm −2 /0.2 mAh cm −2 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jing Mao,Yunpeng Qu,Qiuyun Yang,Xiance Zhu,Xiaosi Qi,Yao Liu
Metacomposites have shown promising prospects in the application fields of radio frequency bands such as electromagnetic (EM) shielding/absorbing, meta-antennas, and stealth. However, the realization of their negative parameters is not due to the periodic array structure, which leads to the complex and ambiguous structure-property relationship. Therefore, we have created a bifunctional structure design strategy based on the three-dimensional network structure of carbon nanotubes (CNT) and the matrix phase of Bi and Fe 3 O 4 synergy. This strategy is based on the percolation concept of conductor/insulator and achieves dual-functional responses of magnetism/dielectric. We achieved a ε′ -negative response in the range of 100 MHz to 1 GHz by utilizing the plasma oscillation effect in the CNT network. The ε′ -negative value was regulated within the 1000 order of magnitude by the CNT content and the electric field frequency. Owing to the competition of multi-level interface polarization mechanisms, the effective carrier concentration of metacomposites is diluted, resulting in a significantly lower ε′ order compared to pure conductors. The maximum saturation magnetization of the CNT/Bi@Fe 3 O 4 metacomposites after percolation reaches 15–25 emu/g. The effectiveness of this structure can be further analyzed by using the equivalent circuit model and radar cross-section EM simulation technology, thereby clarifying the capacitance/inductance characteristics and EM shielding effect of ε′ -negative materials. Our work offers a novel structural design concept which broadens the scope of EM metacomposites and pave the way to practical applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Zhao Sun,Bin Wang,Nicholas F. Dummer,Haifeng Qi,Louise R. Smith,Zhiqiang Sun,Graham J. Hutchings
Catalytic methane decomposition is a highly promising CO2-free hydrogen production technology with carbon material generation; however, developing catalysts that can efficiently decompose methane at moderate temperatures remains challenging. In this study, we develop a series of NiMn–Bi molten alloy catalysts with various Ni:Mn ratios for catalyzing methane decomposition. The Mn-modified Ni–Bi alloy exhibits a CH4 conversion of 15.3% at 850 °C, and the corresponding hydrogen production rate increases by 112% compared with Ni–Bi. The ternary alloy catalyst also demonstrates stability at this production rate for up to 80 h. Molecular dynamics simulations show that the introduction of Mn significantly reduces the strong interaction between the active metal Ni and the solvent metal Bi, thereby accelerating the methane dissociation rate. More importantly, among the theoretically calculated binding energy, interfacial energy, Ni–Bi interaction, and mean-square displacement, interfacial energy, a comprehensive demonstration of surface energy and atomic interactions, is proposed as a potential descriptor for predicating and estimating the catalytic performance of the molten alloy-based catalysts.
✓ 已验证
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 8
·2843-2855
·
IF 3.665
Pengfei Ji,Yihua Cui,Dongyue Liu,Tianlong Zhang,Jipeng Lv
A novel functionalized graphene oxide (F-GO) decorated with a double-phosphaphenanthrene structure was fabricated using a covalent modification method. The F-GO with Bi-DOPO groups then was introduced into the epoxy matrix as a highly effective flame retardant. The Flame retardant epoxy resins (FREP) containing F-GO exhibited superior fire-resistant performance with extremely low loading. When the content of F-GO was 1 wt%, the limiting oxygen index value of the FREP was increased from 19.9% to 30.8%, and the total heat release and the peak heat release rate was decreased by 44.0% and 55.5%, respectively. Meanwhile, the tensile and impact tests results indicated that the mechanical properties of the epoxy resins were improved with the addition of F-GO. Furthermore, the thermogravimetric analysis showed that F-GO greatly increased the char-yield of the cured FREP. Based on the char analyses of SEM images, F-GO was conducive to form a more protective char barrier for FREP during combustion. F-GO developed a synergistic flame-retardant effect of the Bi-DOPO derivative and graphene layer structures on epoxy resins.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Shifen Li,Wajiha Ahmed,Shuqin Wang,Xinman Hu,Beiduo Wang,Zhaoyi Wang,Liyin Shen,Yang Zhu,Changyou Gao
The adhesion between heart and chest post-operation raises a significant challenge for the application of cardiac patches due to its severe influences on the recovery of heart function and increased risk of re-treatment. Anabatic inflammatory response and increased oxidative stress aggravate the damage to heart functions. Herein, a multi-functional cardiac patch was manufactured by successive electrospinning of two types of novel selenium-containing polyurethanes (PU), followed by click grafting of poly (ethylene glycol) (PEG) molecules on the top layer. This patch possessed dual-functions of postoperative anti-adhesion and anti-oxidative stress for efficient therapy post myocardial infarction (MI). The high redox reactivity of diselenium bonds were introduced into the main chains of PU, which reduced the level of reactive oxygen species (ROS) and modulated the inflammatory environment, alleviating the synechia formation simultaneously. The cardiac patch could effectively resist fibroblast adhesion, regulate the expression of vinculin and tissue-type plasminogen activator (t-PA), and inhibit the synechia formation. Meanwhile, it also restored significantly the heart function post MI by decreasing the local inflammation, facilitating less collagen formation, and improving cell signal transduction and angiogenesis. Collectively, this novel patch achieved anti-adhesion and therapeutic effect synergistically, bringing advancement in cardiac patch design and potential for translation of medicinal devices.
研究领域:
生物材料
·
心血管工程
·
组织工程
·
再生医学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 5
·期 4
·1756-1768
·
IF 8.262
Ting Wang,LingHua Tan,ChenDi Ding,MingDong Wang,JianHua Xu,JiaJun Fu
Redox-triggered smart nanocontainers, RTSNs 1, assembled by installing supramolecular switches onto the exterior surface of mesoporous silica nanoparticles, were successfully synthesized. The reversible transition upon redox stimuli from self-complexation to self-dissociation of supramolecular switches, which are in the form of β-cyclodextrin monofunctionalized with a ferrocene moiety, realizes switch behavior and regulates the release of p-coumaric acid (CA) encapsulated in mesoporous silica nanoparticles. Based on these facts, a bi-layered nanocomposite coating was designed and coated on the surface of AA2024 by successive deposition of a Ce(IV)-doped ZrO2–SiO2 sol–gel coating and an RTSNs 1 incorporated ZrO2–SiO2 coating. The bi-layered nanocomposite coating shows high barrier performance, effectively delaying the corrosion process occurring on the metallic surface in 0.5 M NaCl solution for 20 days. Once the bi-layered nanocomposite coating suffers local damage, Ce(IV) salt meets with RTSNs 1 in the scratched area and thus open the supramolecular switches, resulting in the release of the organic corrosion inhibitors, CA molecules. In the meantime, Ce(IV) salt is reduced to the inorganic corrosion inhibitor, Ce(III) salt. The combination of CA and Ce(III) produces a synergistic inhibition effect, which rapidly repairs the damaged surface and provides durable self-healing functionality.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
智能涂层
·
自修复材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 20
·10857-10866
·
IF 11.9
Qiang Peng,Meng Ma,Qindan Chu,Hao Lin,Wenting Tao,Wenqin Shao,Si Chen,Yanqin Shi,Huiwen He,Xu Wang
With the rapid development of electronic equipment and communication technology, it is urgent to develop composites with absorption-dominated and high electromagnetic interference shielding effectiveness (EMI SE) to prevent secondary pollution of electromagnetic (EM) waves. Herein, an effective strategy is employed to fabricate porous Ni-coated melamine foam (Ni@MF)/multi-walled carbon nanotubes (CNT)/temperature-sensitive microspheres (TSM)/polydimethylsiloxane (PDMS) composite foams with an absorption-dominated EMI shielding mechanism and high EMI SE at low filler loading. The bi-conductive network, including a high-efficiency Ni@MF sponge obtained by electroless plating and ordered arrangement and distribution of CNTs induced by the volume exclusion effect, endows the Ni@MF/CNT/TSM/PDMS composite foam with an extremely high conductivity of 2799.8 S m−1 and excellent EMI SE of 45.3 dB with a low CNT loading of 3.0 wt%. The absorption coefficient (A) exceeding 0.72 indicates the absorption-dominated EMI shielding mechanism due to weakened impedance matching and diversiform dissipation mechanisms. What's more, the hydrophobicity, excellent mechanical properties, stable pH resistance and outstanding EMI shielding durability promote the composite foams to maintain impressive performance even in complex and harsh environments. This work establishes an efficient strategy for the absorption-dominated EMI shielding composite foams with a porous structure and bi-conductive network structure, which reveals prospective applications in intelligent electronic equipment and next-generation communication technologies.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 27
·2215109
·
IF 19
Yanran Zhu,Qian Chen,Yue Zhou,Xingya Li,Liang Ge,Tongwen Xu
Acid recycling via cation exchange membranes (CEMs) has attracted considerable attention from traditional industries and advanced manufacturing because of the economic and environmental advantages. However, current polymeric CEMs merely have constant ion channels by the fixed groups in the matrix and lack the synergy of bi-functional sites. Herein, a series of dibenzo-18-crown-6 (DB18C6) functionalized sulfonated poly(biphenyl alkylene) membranes is reported. The resultant membranes form phase separation and ordered ion channels by the electrostatic interaction between DB18C6-H + complexes and the SO 3 − anionic sites, constructing a low-swelling synergistic hydrophilic network. The prepared membranes have high proton permeation rates of 2.98-4.85 mol m −2 h -1 and extremely low ferrous ion permeabilities, leading to a high H + /Fe 2+ selectivity of ≈3153 at the current density of 10 mA cm -2 , which is one order of magnitude higher than the commercial and previously reported membranes via the electrodialysis. These results provide strategies for designing bi-functional ion exchange membranes for selective ion transport via utilizing crown ether/cation complexes.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 11
·1767
·
IF 5.3
Wenqin Lai,Yating Liu,Mingming Zeng,Dongmei Han,Min Xiao,Shuanjin Wang,Shan Ren,Yuezhong Meng
The rapid development of electrochemical CO2reduction offers a promising route to convert intermittent renewable energy into products of high value-added fuels or chemical feedstocks. However, low faradaic efficiency, low current density, and a narrow potential range still limit the large-scale application of CO2RR electrocatalysts. Herein, monolith 3D bi-continuous nanoporous bismuth (np-Bi) electrodes are fabricated via a simple one-step electrochemical dealloying strategy from Pb-Bi binary alloy. The unique bi-continuous porous structure ensures highly effective charge transfer; meanwhile, the controllable millimeter-sized geometric porous structure enables easy catalyst adjustment to expose highly suitable surface curvatures with abundant reactive sites. This results in a high selectivity of 92.6% and superior potential window (400 mV, selectivity > 88%) for the electrochemical reduction of carbon dioxide to formate. Our scalable strategy provides a feasible pathway for mass-producing high-performance and versatile CO2electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiao-Di Tang,Yi-yang Wang,Chao-Yang Wang,Lei Yuan,Yong Yi
Platinum-containing multimetallic catalysts supported on carbon materials have become one of the main choices for direct ethanol fuel cells (DEFCs) due to their high catalytic activity for the ethanol oxidation reaction (EOR). In this study, a platinum-bismuth alloy catalyst (PtBi@CA) with uniform distribution and small particles was provided by a one-step reduction method without the addition of structure directing agents and stabilizers . In the half-cell test, PtBi@CA(50−50) with the smallest crystallite size has high peak current density and pseudo-steady current density of 64.336 mA/cm 2 and 0.096 mA/cm 2 , respectively, which is 11.22 times and 1.85 times the high of the most advanced commercial carbon-supported platinum catalysts (Pt/C). The method is simple and feasible, greatly reduces the amounts of precious metals, and has broad application prospects in the synthesis of anode electrocatalysts for direct ethanol fuel cells.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Yong Yu,Zhongxiang Yang,Zhichao Shang,Xiaohong Wang
In this study, Bi/BiOCl nanosheets were prepared by a rapid, cost-efficient and one-step solution combustion synthesis method using a mixed fuel (glycine and tartaric acid). Through thermometry and thermogravimetric analysis/differential scanning calorimetry (TGA-DSC), the combustion mode and reaction mechanism are analyzed. The reducing gas produced by the mixed fuel is a necessary condition for obtaining metal Bi decorated BiOCl , and the content of Bi in the composite can be regulated by adjusting the molar ratio of Bi/Cl in reactants. In addition, under visible light irradiation, due to the SPR effect of metal Bi, Bi/BiOCl composite photocatalyst shows better photocatalytic performance, in which the highest degradation efficiency of Rhodamine B (RhB) within 120 min is 2.6 times higher than that of BiOCl. Thus, the present study provides an economic and convenient method for the tunable synthesis of a high-efficiency catalyst for the degradation of pollutants.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 19
·期 7
·2206407
·
IF 15.153
Mingfei Yu,Yueling Chen,Ming Gao,Guocheng Huang,Qiaoshan Chen,Jinhong Bi
Seeking highly-efficient, non-pollutant, and chemically robust photocatalysts for visible-light-driven ammonia production still remained challenging, especially in pure water. The key bottle-necks closely correlate to the nitrogen activation, water oxidization, and hydrogen evolution reaction (HER) processes. In this study, a novel Bi decorated imine-linked COF-TaTp (Bi/COF-TaTp) through N–Bi–O coordination is reasonably designed to achieve a boosting solar-to-ammonia conversion of 61 µmol −1 g −1 h −1 in the sacrificial-free system. On basis of serial characterizations and DFT calculations, the incorporated Bi is conducive to the acceleration of charge carriers transfer and N 2 activation through the donation and back-donation mode. The N 2 adsorption energy of 5% Bi/COF-TaTp is calculated to be −0.19 eV in comparison with −0.09 eV of the pure COF-TaTp and the electron exchange between N 2 and the modified catalyst is much more intensive. Moreover, the accompanied hydrogen production process is effectively inhibited by Bi modification, demonstrated by the higher energy barrier for HER over Bi/COF-TaTp (2.62 eV) than the pure COF-TaTp (2.31 eV) when using H binding free energy (Δ G H* ) as a descriptor. This work supplies novel insights for the design of photocatalysts for N 2 reduction and intensifies the understanding of N 2 adsorption and activation over covalent organic frameworks-based materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）