JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Wei Zhiqiang,Zhou Meipan,Zhang Huining,Bai Jinglong,Ding Meijie,Li Zhiming,Yu Qingsong
In this study, transition metal sulfide composites were synthesized through a cost-effective and simple hydrothermal method, intended for use as electrode materials in supercapacitors. Studies have shown that the material has excellent electrochemical properties. During the preparation of MoS 2 /carbon nanotubes (CNTs), when 1 mmol of cobalt nitrate replaces sodium molybdate, the composite material achieves a specific capacitance of 1560 A g −1 at a current density of 1 A g −1 and 1335 A g −1 at 10 A g −1 , demonstrating excellent rate performance. After 5000 charge/discharge cycles at a current density of 10 A g −1 , the material maintains a capacity retention of 83.1%, with a coulombic efficiency close to 100%. When assembled into a hybrid capacitor, the specific capacitance still reaches 128.9 F g −1 at a current density of 1 A g −1 , still has 54% capacity retention at a current density of 10 A g −1 , and provides an energy density of 45.83 W h kg −1 at a power density of 800.92 W kg −1 , demonstrating its potential application value in high-efficiency energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Kai Yuan,Yiqing Zeng,Jinxin Gan,Zhaoxiang Zhong,Weihong Xing
Catalytic membranes can achieve the simultaneous purification of particulate matter (PM) and gaseous pollutants, and their performance depends on the design of a catalyst and its combination with a membrane material. Herein, a novel Pt@CNTs/SiC catalytic membrane composed of a Pt@CNTs (carbon nanotubes) membrane layer and a porous SiC support was developed for the simultaneous removal of formaldehyde and PM at room temperature. The CNT membrane layer underwent vertically integrated growth on a porous SiC support, which provided the catalytic membrane with a pore size of 7.4 μm and a high gas permeance of 240.2 m3·m–2·h–1·kPa–1. The loading of Pt particles on CNTs slightly decreased the gas permeance of the catalytic membrane (219.9 m3·m–2·h–1·kPa–1) but endowed the membrane with catalytic formaldehyde degradation performance. The obtained Pt@CNTs/SiC catalytic membrane with a 240 μm thick CNT layer and 0.8% Pt loading exhibited 99.999% filtration efficiency for 300 nm SiO2 (face velocity = 1 m/min) and 72.1% formaldehyde degradation (gas flow = 49 mL/min), implying that the Pt@CNTs/SiC membrane has good application potential in the collaborative removal of various air pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fei Wang,Zhaohui Wang,Yuheng Li,Shengjing Guan,Shan Wei,Dong Liu,Xiuxia Meng
Two-dimensional (2D) MXene-based materials are gained significant attention as a prospective anode in lithium-ion batteries (LIBs) due to their superior metallic conductivity, high volumetric capacitance, and thermal stability. However, the unsatisfactory electrochemical performance of MXene-based anodes essentially restricts their practical use attributed to the prevalent interlayer stacking. The urchin-like Ti 3 C 2 @CNTs involve grafting carbon nanotubes (CNTs) onto the 3D hollow MXene via catalytic growth could promise to overcome this obstacle. As conductive bridges, the CNTs further expedite the exchange of charges at the interface, resulting in improved electrochemical kinetics of the composite, which exhibits a high specific capacity of 286.2 mA h g −1 at 1 A g −1 after 2000 cycles. Beneficial from the well-designed architecture, outstanding microwave absorption was achieved with the optimal reflection loss of −48.1 dB covering the C band. This study proposed a practical strategy for fabricating the Ti 3 C 2 @CNTs composite in high-performance lithium-ion batteries and microwave absorbers.
研究领域:
材料科学
·
能源存储
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yin Wang,Qikui Man,Shiqi Zhu,Zhenkuang Lei,Guoguo Tan,Hongtao Guan
It’s a hurry to introduce a lightweight and high-efficiency microwave absorption material that is easy to synthesize, since the electromagnetic interference pollution is getting increasingly serious. Carbon-based microwave absorption material based on bimetallic metal-organic frameworks (MOFs) gets high conductivity and good magnetism at the same time, and thus can be regarded as an efficient microwave absorber with lightweight. Herein, we introduce an easy method to compose bimetallic carbon-based microwave absorbers based on ZIF-67. By changing the proportion of Fe 3+ and Co 2+ , not only the magnetism of the material can be adjusted, the amount of carbon nanotubes (CNTs) and so as the dielectric property of the material can also be regulated. The method of introducing precursors at room temperature and then calcinating at an Ar atmosphere is simple to repeat and appropriate for mass production. When the dosage molar ratio of Co 2+ : Fe 3+ is 3: 2, the minimum reflection loss ( RL min ) can reach − 24.83 dB while the effective absorption bandwidth (EAB) can reach 5.14 GHz when the thickness is 1.7 mm, under a 30 wt% filling loading. We believe that this work can provide a reliable method to introduce carbon-based microwave absorption material based on bimetallic MOF materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Guang-Lan Li,Ying-Ying Miao,Xiang-Yue Qiao,Tian-Yu Wang,Fei Deng
Boosting the hydrogen and oxygen evolution reaction (HER/OER) on MoS 2 -based catalysts is a challenging scientific issue due to the activity of MoS 2 is significantly rely on the edge site which is limited in regular structure. Herein, a highly dispersed edge site-rich NiS 2 /MoS 2 /CNTs heterojunction catalyst is successfully developed via facile etching the nanoflower-like NiS 2 /MoS 2 spheres on carbon nanotubes (CNTs). Through expanding the lattice spacing of 2H-MoS 2 , generating abundant Mo-S edge sites ( i.e . generating a large number of unsaturated S atoms) together with enhancing the dispersity of NiS 2 /MoS 2 nanosheets, the etching posttreatment significantly regulates the electronic and geometric structure of NiS 2 /MoS 2 /CNTs. Further combining the extremely intimate electronic interaction between MoS 2 /NiS 2 heterogeneous interfaces, the optimal NiS 2 /MoS 2 /CNTs presents a preeminent alkali water splitting performance with overpotentials of 149 for HER and 315 mV for OER at 10 mA cm −2 , which are 29 and 35 mV lower than the catalyst before etch treatment (NiS 2 /MoS 2 /CNTs-p), respectively. Moreover, the electrolyzer assembled with NiS 2 /MoS 2 /CNTs drives a voltage of 1.73 V at 10 mA cm −2 and a continuous stable operation of 50 h toward overall water splitting.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiao Huang,Jun Wang,Ziyang Liu,Fangming Shen,Jinjian Zhang,Yongyuan Ren,Xiaoli Zhan,Qinghua Zhang
Asymmetric electrolytes with both anode and cathode compatibility are promising candidates for high-energy–density batteries and high-safety lithium metal batteries (LMBs). However, the asymmetric electrolyte is still hindered by the complex multi-layer coating process, resulting in multiple internal interfaces of the electrolyte and poor battery performance. Herein, a one-step constructed asymmetric electrolyte with gradient distributions of 2‐ureido‐4[1H]-pyrimidinone functionalized carbon nanotubes (UPy-CNTs) is prepared via the dual driving forces of solvent evaporation and fluoropolymer migration. On the one hand, during the solvent evaporation process, based on the competitive effect between evaporation of solvent and diffusion of dispersions, the gradient distribution of asymmetric electrolyte can be constructed by enhancing evaporation and inhibiting uniform diffusion. On the other hand, due to the abundant hydrogen bonds between UPy and F, the gradient distribution of UPy-CNTs can be further promoted when the fluoropolymer spontaneously migrates to the surface. The gradient distribution of UPy-CNTs not only greatly increases Young’s modulus of the asymmetric electrolyte on the Li metal side, but also can adjust the Li + solvation structure to form a LiF-rich solid electrolyte interface (SEI), thereby inhibiting the generation and growth of lithium dendrites. Because of the ingenious structure of the asymmetric electrolyte, the ionic conductivity is 0.226 mS cm −1 and the Li + transferences number is 0.79. Prominently, Li||Li symmetric batteries can stably cycle for 2500 h at 0.1 mA cm −2 and 0.1 mAh cm −2 . In addition, Li||LFP batteries can maintain a high specific capacity of 146 mAh g −1 after 200 cycles at 0.5C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xue Guo,Junbin Lu,Jie Liu,Chunmiao Liu,Yanchun Tong,Jiao Li,Haibin Sun,Hui Peng,Shigang Wu,Yurun Feng,Hongyu Gong
By utilizing polymer-derived ceramics (PDCs) method and electrospinning technology, SiCN(Ni) fibers with 1 wt% nickel content at different calcination temperatures (1000–1300 °C) were synthesized. The properties of PDCs-SiCN(Ni) fibers were tested by XRD , SEM, TEM, Raman spectroscopy , XPS and vector network analyzer. The results showed that the addition of nickel acetylacetonate (NA) promoted the in-situ formation of CNTs and Ni 2 Si at high temperatures, which could adjust the impedance matching performance and improve the electromagnetic wave (EMW) absorption properties. The minimum reflection loss (RL) of SiCN(Ni) fibers was −47.55 dB (4.2 mm), and the effective absorption band (EAB, RL ≤ −10 dB) was 3.6 GHz (14.4–18 GHz) under the ultra-thin thickness of 1.24 mm.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 56
·45320-45330
·
IF 3.84
Guannan Wang,Limin Chen,Yuhai Sun,Junliang Wu,Mingli Fu,Daiqi Ye
Methanol synthesis from CO2 hydrogenation in a fixed-bed plug flow reactor was investigated over Cu–ZrO2 catalysts supported on CNTs bearing various functional groups. The highest methanol activity (turnover frequency 1.61 × 10−2 s−1, space time yield 84.0 mg gcat−1 h−1) was obtained over the Cu/ZrO2/CNTs catalyst (CZ/CNT-3) with CNTs functionalized by nitrogen-containing groups and Cu loading only about 10.3 wt% under the reaction conditions of 260 °C, 3.0 MPa, V(H2) : V(CO2) : V(N2) = 69 : 23 : 8 and GHSV of 3600 h−1. The catalysts were fully characterized by N2 physisorption, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR) and temperature-programmed desorption of H2 (H2-TPD) techniques. The excellent performance of CZ/CNT-3 is attributed to the presence of nitrogen-containing groups on the CNTs surface, which increase the dispersion of copper oxides, promote their reduction, decreases the crystal size of Cu, and enhances H2 and CO2 adsorption capability, thus leading to good catalytic performance towards methanol synthesis.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Meiling Li,Huaiyuan Wang,Yuxin Fu,Jing Jing,Xiguang Zhang,Chijia Wang,Ruitao Wang,Zhanjian Liu
The application of superhydrophobic coatings in the corrosion protection field is limited by their poor surface structural stability, interfacial compatibility and adhesion strength. Herein, we prepared an epoxy/PANI@CNTs composite superhydrophobic coating with excellent mechanochemical stability by the combination of organic-inorganic hybridization and chemical modification. PANI@CNTs nanofillers synthesized by in-situ polymerization of aniline on the CNTs surface were used to construct the necessary nano-microstructures for superhydrophobicity and enhance the corrosion inhibition. The optimal coating showed high water contact angle of 159.5 ± 0.8° and low sliding angle of 3 ± 0.4°. The adhesion strength of the prepared coating attained the highest grade (GB/T9286) due to the formation of hydrogen bonds among polyaniline, silicon hydroxyl groups and the substrate surface. Moreover, the prepared coating maintained its superhydrophobicity even after 480 s of water impact, 1000 g falling sand impact or 500 abrasion cycles, which can be ascribed to the multi-interface enhancement generated by the organic-inorganic hybridization and the hydrogen bonds interaction. Furthermore, the prepared coating also possessed outstanding corrosion resistance with low-frequency impedance modulus remained at 4.79 × 10 8 Ω·cm 2 after immersion for 15 days, which was approximately three times that of the superhydrophobic coating without PANI@CNTs. This is mainly due to the triple protection mechanism formed by the air-film shielding, physical shielding of the coating and the synergistic passivation of polyaniline, endowing it with excellent anti-corrosion performance. Therefore, this study is expected to provide a theoretical reference for the application of superhydrophobic coatings in the corrosion protection of metal mechanical equipment.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Mihong Cao,Luyi Wang,Qian Zhang,He Zhang,Shengwen Zhong,Jun Chen
In this work, a conductive slurry containing CNTs is used as a modification reagent for the Super-P (SP) conductive agent. After CNTs is recombined with SP, spherical SP particles with a diameter of about 60 nm are evenly dispersed on the surface of CNTs nanotubes with a diameter of 20 nm, which effectively improves the specific surface area of the conductive agent. As a result, the battery using 1.5 % CNTs/SP composite conductive agent shows a smaller EIS impedance value, which makes the comprehensive behaviors of the LiNi 0.5 Co 0.2 Mn 0.3 O 2 battery significantly improved. The CNTs/SP battery shows larger CV curve area and smaller potential difference between oxidation and reduction peaks. In addition, the initial charge and discharge capacity of CNTs/SP battery are 181.7 and 184.7 mAh/g respectively with initial Coulombic efficiency of 98.4%, which are much higher than the pristine SP battery (173.7 and 182.0 mAh/g respectively with initial Coulombic efficiency of 95.4 %). After 70 cycles, the discharge capacity of CNTs/SP battery can still remain at 175.3 mAh/g with capacity retention ratio of 97.2 %, which are also much higher than the pristine SP battery (142.5 mAh/g with capacity retention ratio of 82.8 %). Moreover, compared with the pristine SP batteries, the CNTs/SP batteries show larger discharge capacities at different rates of 0.2 C, 0.5 C, 1.0 C, 2.0 C, 3.0 C and 5.0 C. After combining SP with CNTs nanowires, the discharge capacity, initial coulombic efficiency, cycle stability and rate capability of LiNi 0.5 Co 0.2 Mn 0.3 O 2 electrode are effectively improved, which provides a new idea for the development of novel conductive agent for high-performance cathode materials of lithium ion batteries .
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Qi Qu,Huanhuan Wang,Qianpeng Dong,Yan He
In the current work, Ni-Co/CNTs networks were firstly produced by a simple annealing treatment of Ni Co PBA, which was then used as a carbon-based carrier and successfully deposited Fe 3 O 4 nanospheres via a classic hydrothermal reaction process. Additionally, the electromagnetic wave absorption performances of composites could be effectively affected by adjusting the mass ratio of the Fe 3 O 4 nanoparticles . The minimum reflection loss (RL min ) of −48.76 dB was achieved for Fe 3 O 4 @Ni-Co/CNTs-1# at 3.5 mm thickness. Meanwhile, Fe 3 O 4 @Ni-Co/CNTs-2# exhibited a wide effective absorption band (EAB) of 5.9 GHz (12.1–18 GHz) at a 2.0 mm matching thickness, suggesting that the Fe 3 O 4 @Ni-Co/CNTs composites were a promising absorber for electromagnetic wave absorption materials . Based on the synergistic effects of dielectric and magnetic losses generated by Ni-Co/CNTs and Fe 3 O 4 , respectively, and appropriately matched impedances, a new strategy for fabricating lightweight, thin-thickness, strong absorption, and wide-bandwidth materials was provided.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2787-2798
·
IF 2.5
Lei Yimin,Wei Yuxiang,Wu Dekai,Zhu Qing,Sun Yanan,Zhou Xuejiao,Xi He,Zhong Peng,Sun Jie
Electro catalysts play a vital role in facilitating the reaction process in the oxygen reduction reaction (ORR) of fuel cells. In methanol fuel cells, methanol easily penetrates the diaphragm rendering the ORR catalyst inactive. Although commercial platinum exhibits excellent ORR catalytic activity, its poor methanol resistance and long-time durability severely restrict its sustainable development and application. This work synthesized Ti 4 O 7 /CNT nanocomposite electrocatalysts by using the sol-gel method followed by high-temperature carbothermal reduction. The obtained catalysts exhibit a large electrochemically active surface area (347.89 cm 2 ) and low interfacial charge transfer resistance (64.5 Ω). The reduction potential (0.73 V), onset potential (0.93 V), half-wave potential (0.73 V), and electron transfer number (3.7) of this electrocatalyst are all close to those of the Pt/C electrocatalysts in alkaline medium. Simultaneously, it also possesses remarkable methanol tolerance and long-term durability, whose relative current density can maintain above 74% after cycling for 24 h.
研究领域:
材料科学
·
电化学
✓ 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）