JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Songyuan Wu,Jiaheng Wang,Linheng Zhao,Yulong Cao,Haoxiang Yang,Xiao Jing,Jiarui Li,Yang Zhao,Jiaxu Gong,Yatang Dai
The quest to achieve high energy density and superior stability in supercapacitors is both attractive and challenging. This work reports a simple method to grow CoTe/NiCo 2 S 4 composite electrode materials with core-shell structure. When used as a cathode material, the unique core-shell structure exhibits outstanding electrochemical characteristics, including a superior specific capacitance (1470.45 F g −1 at 1 A g −1 ), outstanding cycling stability (86.69 % after 5000 cycles), and impressive rate performance (77.17 % at 10 A g −1 ). Notably, the asymmetric hybrid supercapacitor constructed using CoTe/NiCo 2 S 4 as the cathode and AC/NF as the anode can provide an operating voltage of 1.8 V, achieving a peak energy density of 39.8 Wh kg −1 and a highest power density of 832 W kg −1 . Moreover, the supercapacitor demonstrates satisfactory rate performance (81.25 % at 10 A g −1 ) and excellent cycling stability (86.61 % after 8000 cycles). Furthermore, when assembled into a quasi-solid-state flexible supercapacitor, the device can support a small toy fan to run for 66 seconds, thereby highlighting its viability for practical energy storage applications.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jin Wang,Bing Li,Tiantian Tang,Caiyun Li,Hongrui Yang,Hanwen He,Xinshuang Lin,Yang Song,Sen Zhang,Chao Deng
The design of highly efficient catalysts to enhance the kinetics of oxygen reduction (OER) and oxygen evolution (ORR) reactions is the key issue for the development of high-performance Zn-air battery. In this work, we report the design of Co-CoTe heterostructured fibers as the bifunctional oxygen catalyst for Zn-air battery. Firstly, the theoretical analysis was carried out on Co-CoTe heterostructure. The large work function difference is favorable to construct strong interfacial built-in electric field (BIEF), and the low energy barrier endows high catalytic activities. Moreover, the in-situ grown carbon shell was designed to build “core–shell” Co-CoTe/C unit to realize its high performance. They assemble the Co-CoTe@HFS fiber with good self-supporting and flexible features. Taken the advantages of the strong BIEF, the “core–shell” basic unit, and the freestanding substrate, the Co-CoTe@HFS fiber achieves the good electrocatalytic properties and high reliability. The full Zn-air battery (ZAB) with the Co/CoTe@HFS air cathode achieves the high peak power density and cycling stability over long-term cycling. Therefore, this work provides a clue to design bifunctional oxygen catalysts for high-performance ZABs.
研究领域:
材料科学
·
能源化学
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DOI
PubMed
高影响因子
Green Energy & Environment
·
2022
·
IF 12.781
Yang Zhou,Lice Yu,Jinfa Chang,Ligang Feng,jiujun Zhang
Low carbon alcohol fuels electrolysis under ambient conditions is promising for green hydrogen generation instead of the traditional alcohol fuels steam reforming technique, and highly efficient bifunctional catalysts for membrane electrode fabrication are required to drive the electrolysis reactions. Herein, the efficient catalytic promotion effect of a novel catalyst promoter, CoTe, on Pt is demonstrated for low carbon alcohol fuels of methanol and ethanol electrolysis for hydrogen generation. Experimental and density functional theory calculation results indicate that the optimized electronic structure of Pt–CoTe/C resulting from the synergetic effect between Pt and CoTe further regulates the adsorption energies of CO and H∗ that enhances the catalytic ability for methanol and ethanol electrolysis. Moreover, the good water activation ability of CoTe and the strong electronic effect of Pt and CoTe increased the tolerance ability to the poisoning species as demonstrated by the CO-stripping technique. The high catalytic kinetics and stability, as well as the promotion effect, were also carefully discussed. Specifically, 71.9% and 75.5% of the initial peak current density was maintained after 1000 CV cycles in acid electrolyte for methanol and ethanol oxidation; and a low overpotential of 30 and 35 mV was required to drive the hydrogen evolution reaction in methanol and ethanol solution at the current density of 10 mA cm −2 . In the two-electrode system for alcohol fuels electrolysis, using the optimal Pt–CoTe/C catalyst as bi-functional catalysts, the cell potential of 0.66 V (0.67 V) was required to achieve 10 mA cm −2 for methanol (ethanol) electrolysis, much smaller than that of water electrolysis (1.76 V). The current study offers a novel platform for hydrogen generation via low carbon alcohol fuel electrolysis, and the result is helpful to the catalysis mechanism understanding of Pt assisted by the novel promoter.
研究领域:
催化化学
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能源科学
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材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Keying Cui,Lange Du,Weimin Du,Weiling Chen,Yufan Zhang,Lili Cui,Dapeng Wu
CoTe@NixSy core-shell nanowires are designed and grown on cobalt foams via hydrothermal and electrodeposition method. Structural characterizations indicate the tightly coating of NixSy nanosheets around CoTe nanowires forms the novel core-shell nanowires. Benefiting from this structural engineering design, CoTe@NixSy core-shell nanowires supported by cobalt foams deliver the high areal specific capacitance of 7.56 F cm −2 at 3 mA cm −2 and retention rate of 81.3% after experiencing 5000 cycles. It needs to be specially mentioned that CoTe@NixSy core-shell nanowires were functionally applied in aqueous/flexible hybrid supercapacitors with activated carbon as the negative materials. The aqueous hybrid devices exhibit a maximum areal energy density of 0.77 mWh cm −2 at 2.52 mW cm −2 and retention rate of 81.9% after 5000 cycles. Meanwhile, the flexible hybrid devices show superior energy-storage performance, such as high volume energy density of 3.95 mWh cm −3 at 22.64 mW cm −3 , improved cycle stability (82.1% after experiencing5000 cycles), and remarkable flexibility. This work not only demonstrates CoTe@NixSy core-shell nanowires as the promising candidate of energy-storage device; but also provides a novel strategy for high-performance electroactive materials.
研究领域:
材料科学
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能源存储技术
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结构工程
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DOI
高影响因子
Small Methods
·
2019
·Vol. 3
·期 5
·1900113
·
IF 0
Liu Yang,Haoxiang Xu,Huibing Liu,Daojian Cheng,Dapeng Cao
Developing efficient non-precious bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly critical for overall water splitting. Herein, vertically aligned CoTe and NiTe nanoarrays are synthesized in situ grown on Ni foams (marked as CoTeNR/NF and NiTeNR/NF) via a facile hydrothermal method, and further explore their catalytic activities for overall water splitting. The CoTeNR/NF catalyst exhibits not only excellent OER performance with a low overpotential of 350 mV to deliver 100 mA cm −2 , but also high HER activity only requiring 202 mV overpotential to yield 10 mA cm −2 in alkaline condition. Moreover, experimental technique and density functional theory are combined together to reveal that the real active sites of CoTeNR/NF for OER are from the in situ generated CoOOHspecies on CoTeNR/NF in the OER process, and also propose a new HER performance evaluation criteria of using H 2 O adsorption energy, H 2 O dissociation barrier, and H 2 /OH − desorption energy as an indicator. The new criteria can satisfactorily evaluate the HER performance of as-synthesized samples, while the traditional one of using H adsorption energy as an indicator fails in the HER performance evaluation of as-synthesized samples. It is expected that the new evaluation criteria can be used as a general criteria to evaluate the HER performance of other electrocatalysts.
研究领域:
材料科学
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电化学
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催化
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能源材料
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产品关联
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Tiantian Xiong,Xianwei Li,Zhiyong Ma,Kaiyi Liu,Yi Li,Chen Li,Fang Luo,Zehui Yang
The sluggish kinetics and inferior stability of oxygen electrocatalyst in rechargeable zinc air battery (ZAB) hamper its industrialization. In this work, we activate cobalt telluride (CoTe) by introduction of metallic cobalt (Co) to modulate the work function to facilitate the electron transfer from Co to CoTe during oxygen catalysis; additionally, the three-dimensional porous carbon nanosheets (3DPC) are invited to reduce the resistance towards electrolyte/oxygen diffusion. Thereby, Co-CoTe@3DPC only demands 280 mV overpotential to reach 10 mA cm −2 under alkaline oxygen evolution reaction (OER) condition, relatively lower than commercial iridium oxides (IrO 2 ); besides, the operando electrochemical impedance spectroscopy (EIS) indicates a better resistance towards surface reconstruction than Co@3DPC leading to a superior stability. A Pt-like oxygen reduction reaction (ORR) performance, half-wave potential associated with kinetic current density , is achieved for Co-CoTe@3DPC. A maximum power density of 203 mW cm −2 is achieved and sustains for 800 h. Furthermore, the all-solid-state ZAB offers 97 mW cm −2 . Theoretical calculation suggests that the incorporation of metallic Co to CoTe maintains the superb ORR activity and promotes the OER catalysis.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 15
·7997-8006
·
IF 2.936
Beirong Ye,Chao Gong,Miaoliang Huang,Yongguang Tu,Xuanqing Zheng,Leqing Fan,Jianming Lin,Jihuai Wu
Cobalt telluride (CoTe) nanosheets as supercapacitor electrode materials are grown on carbon fiber paper (CFP) by a facile hydrothermal process. The CoTe electrode exhibits significant pseudo-capacitive properties with a highest Cm of 622.8 F g−1 at 1 A g−1 and remarkable cycle stability. A new asymmetric supercapacitor (ASC) is assembled based on CoTe (positive electrode) and activated carbon (negative electrode), which can expand the operating voltage to as high as 1.6 V, and has a specific capacitance of 67.3 F g−1 with an energy density of 23.5 W h kg−1 at 1 A g−1. The performance of the ASC can be improved by introducing redox additive K4Fe(CN)6 into alkaline electrolyte (KOH). The results indicate that the ASC with K4Fe(CN)6 exhibits an ultrahigh specific capacitance of 192.1 F g−1 and an energy density of 67.0 W h kg−1, which is nearly a threefold increase over the ASC with pristine electrolyte.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Energy Materials
·
2026
·Vol. 6
·期 8
·N
·
IF 11.9
Jingjing Qie\u003Csup\u003E1,\u003C\u002Fsup\u003E,Huiyue Sun\u003Csup\u003E1,\u003C\u002Fsup\u003E,Shuang Geng\u003Csup\u003E1,\u003C\u002Fsup\u003E,Yongqi Shang\u003Csup\u003E1\u003C\u002Fsup\u003E,Qunzhi Huang\u003Csup\u003E1\u003C\u002Fsup\u003E,Jishi Wei\u003Csup\u003E1,2,\u003C\u002Fsup\u003E,Ke Chen\u003Csup\u003E1\u003C\u002Fsup\u003E,Taifeng Liu\u003Csup\u003E3\u003C\u002Fsup\u003E,Shuxi Dai\u003Csup\u003E1,\u003C\u002Fsup\u003E,Wuxing Hua\u003Csup\u003E1,4,\u003C\u002Fsup\u003E,Zhen Zhou\u003Csup\u003E4\u003C\u002Fsup\u003E
Developing an effective electrocatalyst to regulate the kinetics of the sulfur redox reaction is essential for inhibiting polysulfide shuttling in Li-S batteries. Here, the electronic structure of CoTe, modulated by cation doping, is systematically investigated to elucidate how orbital hybridization optimizes sulfur redox electrocatalysis. Among the cation-doped CoTe compounds, the introduction of Ni dopants results in the most significant shift of the p-band center of CoTe (Ni-CoTe) towards the Fermi energy level, which facilitates the formation of numerous Te vacancies on the CoTe surface. This structural configuration endows CoTe with a multitude of active sites that bind polysulfide intermediates, lowering the activation energy (Ea) of the sulfur reduction reaction, specifically reducing the Ea for the conversion of lithium polysulfides to Li2S from 0.73 eV to 0.65 eV. As a result, the Li-S battery with Ni-CoTe catalyst delivers exceptional cyclability, with a low-capacity decay of 0.049% per cycle over 1,000 cycles at 2.0 C. Moreover, an initial areal capacity of 13.5 mAh cm-2 at 0.02 C is achieved with a high sulfur loading (10.0 mg cm-2) and a low electrolyte-to-sulfur ratio (5.0 µL mg-1). These findings will provide fundamental insights into orbital-level catalyst design principles for advanced sulfur electrochemistry.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Sichen Huo,Yanjie Chen,Xinyu Wang,Hang Yue,Wenjing Cui,Shuang Shi,Huanyu Guan,Zhuang Cai,Li Li,Ying Dai,Jinlong Zou
Developing a facile pyrolysis-etching strategy to prepare asymmetric Co-Te/NC DAC. • Te atoms drive the transition of Co(III) from intermediate-spin to high-spin state. • High-spin Co(III) enhances the adsorption-desorption equilibrium of O-intermediates. • Co 3 d -Te 4 p orbitals hybridization modulates local charge distribution of Co sites. • The Co-Te/NC-based aqueous zinc-air battery shows a high capacity of 805 mAh g −1 . Atomically dispersed cobalt‑nitrogen‑carbon (Co-N-C) catalysts are highly efficient candidates for oxygen reduction/oxygen evolution reaction (ORR/OER). However, their catalytic activity is limited by the symmetric electron distribution between the metal center and the adjacent N atoms with high electronegativity, which results in suboptimal adsorption energy for the reaction intermediates. To overcome this limitation, asymmetric coordination engineering is employed to introduce the non-metal tellurium (Te) into Co-N-C, constructing a heteronuclear Co-Te/NC dual-atom catalyst that regulate the interaction between Co sites and oxygen intermediates. Magnetic measurements and theory calculations indicate that Te atoms induce spin state transition in the Co(III) active center, driving electron transfer from Te to Co. The high-spin Co(III) in the Co-Te/NC facilitates the efficient adsorption and activation of intermediates while accelerating the product desorption. Additionally, asymmetric Co Te dual atom pair enhances d-p orbital hybridization, optimizing the adsorption energy of intermediates. Therefore, Co-Te/NC exhibits an ORR half-wave potential of 0.922 V and a low OER overpotential of 350 mV. Co-Te/NC-based aqueous zinc-air batteries (ZABs) can achieve a peak power density of 125 mW cm −2 and maintain stable voltage over 660 charge-discharge cycles. Co-Te/NC-based flexible ZABs show minimal output voltage fluctuations at varying folding angles, demonstrating excellent mechanical flexibility. This work offers new insights into the precise regulation of the microenvironment of atomically dispersed catalysts. Download: Download high-res image (197KB) Download: Download full-size image
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DOI
高影响因子
COLORATION TECHNOLOGY
·
2020
·Vol. 136
·期 4
·370-380
·
IF 1.5
Liping Zhang,Min Li,Liangan Wang,Dong Wang,Shaohai Fu
Functional polymer modified carbon black (CB) pigment (P-(DMC- co -CHPMA)- g -MPTS/CB) with reactive epoxy and quaternary ammonium groups was designed and prepared via a thiol-ene click chemistry reaction, and its dispersion ability in the aqueous phase, as well as its colouring and anti-bacterial properties for cotton fabrics, were investigated. In considering both dispersion ability and reactive ability to cotton fabric, the mole ratio of the monomers (methacrylatoethyl trimethyl ammonium chloride [DMC] and 3-chloro-2-hydroxypropyl methacrylate [CHPMA]) was discussed. Morphology and chemical properties of P-(DMC- co -CHPMA)- g -MPTS/CB were tested by scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy, resulting in a weight content of copolymer (DMC- co -CHPMA) in P-(DMC- co -CHPMA)- g -MPTS/CB of ca . 18%. P-(DMC- co -CHPMA)- g -MPTS/CB was fixed onto cotton fabric via a nucleophilic-substituted reaction between reactive epoxy groups on the CB surface and the hydroxyl groups of cotton fabric, which endowed good fastness to cotton fabric without either a fixing or an adhesive agent. Also, coloured cotton fabric demonstrated excellent anti-bacterial activity towards Staphylococcus aureus and Escherichia coli O157:H7.
研究领域:
材料科学
·
纺织工程
·
高分子化学
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DOI
高影响因子
COLORATION TECHNOLOGY
·
2021
·Vol. 137
·期 4
·348-360
·
IF 1.614
Chenglong Wang,Kai Yan,Xun Luo,Shulan Jin,Lili Wang,Jun Luo,Jinhuan Zheng
Polyurethane acrylate-based titanium dioxide was used to prepare blue light-curable inks as both a white pigment to replace the original white pigment and as an oligomer. The polyurethane acrylate-based titanium dioxide was fabricated using a two-step method. In the first step, the titanium dioxide was grafted with γ-aminopropyltriethoxy silane, and the grafting process was studied. Second, amino-modified titanium dioxide was used to prepare polyurethane acrylate-based titanium dioxide, which was then used to configure the blue light-curable polyurethane acrylate-based titanium dioxide ink. Fourier Transform–infrared spectroscopy indicated that the amino-modified titanium dioxide and polyurethane acrylate-based titanium dioxide were prepared successfully. The content of the amino groups on the surface of the amino-modified titanium dioxide could be effectively controlled by adjusting the pH value. Moreover, by increasing the content of the amino groups, the viscosity decreased and the photopolymerisation efficiency increased, which was attributed to the formation of branched structures and the promoting effect of the amino groups on the titanium dioxide. The inks with decreased viscosity and branched structures displayed excellent cross-linking properties: viscoelastic transition was achieved within 10 seconds and the final moduli were in the range of 36-55 kPa. The cross-linking degree and rate were more than seven times those of unmodified ink. The ranges of elongation and stress were 95%-165% and 1.9-4.3 MPa, respectively, and the amino group content varied from 0% to 0.101%. In general, polyurethane acrylate-based titanium dioxide was shown to be suitable for blue light-curable ink.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
COLORATION TECHNOLOGY
·
2023
·
IF 1.8
Kangwei Si,Zhiwei Xu,Xiangdong Zhou
A series of vegetable oil-based nonionic Gemini surfactant (GPNGS) was prepared using grape seed oil and polyethylene glycol monomethyl ether (350, 550, 750) as the primary raw materials. The chemical structures of different types of GPNGS were characterised by Fourier Transform–infrared spectroscopy, elemental analysis, proton nuclear magnetic resonance and carbon-13 nuclear magnetic resonance. The critical micelle concentration (CMC) of GPNGS with different polyoxyethylene chain lengths was measured using the Wilhelmy ring method (CMC: ca . 1.4 × 10 −4 to 5 × 10 −4 mol/L). The results of wettability testing showed that the contact angle of GPNGS on polyamide film was ca . 46-49°. In addition, the interaction of surfactants with acid dyes was also investigated. The ultraviolet spectrum showed a balance between dyes, surfactants and the dye/surfactant complex. Next, the GPNGS was used as a nylon 66 acid dye levelling agent. After adding 0.2 mmol/L of surfactants, the standard deviations (S(λ)) of nylon 66 dyeing decreased from 0.084 to ca . 0.036-0.044, exhibiting a good levelling effect.
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DOI
高影响因子
危险品化学品经营许可证（带存储）