JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 12
·7587-7597
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IF 4.22
Liu Linqing,Zhong Xia,Li Mingqi
Abstract In order to investigate the synergistic effect of TiO 2 and TiN on the electrochemical performance of SiO as anodes for lithium ion battery, a series of SiO/TiO 2 -TiN hybrid materials with different compositions are synthesized through simple high-energy mechanical ball milling using SiO, nano-TiO 2 and nano-TiN as raw materials. Compared with TiO 2 or TiN alone, the combination of TiO 2 and TiN can significantly improve the utilization and cycle stability of SiO. Among them, the 65%SiO/35%(TiO 2 -TiN(8:2)) hybrid exhibits the best comprehensive electrochemical performance. Even at a relatively high mass loading and compaction density, the stable discharge capacity of the electrode is about 920 mAh g −1 at 100 mA g −1 . At 500 mA g −1 , the stable discharge capacity is kept at about 760 mAh g −1 until 250 cycles. When the current density increases to 1600 mA g −1 , the stable capacity is still as high as 480 mAh g −1 . The improved electrochemical performance is attributed to the synergistic effect of TiO 2 and TiN in buffering the volume effect of Si and improving the conductivity of SiO. Different from the previous report, it is found that although the crystal structure of TiN is not destroyed during cycling, its initial reversible pseudocapacitance capacity reaches 80 mAh g −1 at 500 mA g −1 . Graphical abstract
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 42
·19799-19816
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IF 4.682
Zhu Jishi,Li Xinshuo,Yang Rui,Wen Jin,Li Xiaoke
The widespread application of solar-thermal absorbers is currently hindered by their low absorption efficiency and high capital cost. Therefore, many initiatives, including direct absorption solar collectors (DASCs), are currently under way to improve the efficiency of the absorbers. In this regard, the application of TiN-modified h-BN nanosheets in DASCs is studied in this paper. Their superior solar absorptivity and thermal conductivity are based on the plasma plasmon effect of nanoparticles and the high thermal conductivity of h-BN nanosheets, respectively. In the experiment, five different concentrations (20, 40, 60, 80, 100 ppm) of TiN@h-BN composite nanofluids were prepared by a two-step method. The stability and optical properties of the nanofluids were analyzed. In addition, thermal loss and exergic efficiency of photothermal conversion system were analyzed and discussed. Combined with localized surface plasmon resonance (LSPR) of TiN nanoparticles and h-BN light reflection properties, the photothermal conversion of TiN@h-BN composite nanofluids was improved in DASCs. The 80 ppm nanofluid showed the best exergic efficiency, with an average exergic efficiency of 83%. Meanwhile, the photothermal conversion efficiency of 80 ppm TiN@h-BN composite nanofluid reaches the maximum 78%. This work provides new strategies for harnessing the full spectrum of solar energy and controlling the photothermal properties of nanofluids. Graphical Abstract Schematic diagram of photothermal conversion system of TiN@h-BN nanofluids.
研究领域:
材料科学
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能源工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pengfei Wan,Xincheng Guo,Shengdong Jing,Shilan Li,Shengjun Lu,Yufei Zhang,Haosen Fan
Lithium-sulfur (Li-S) batteries present tremendous potential in promising high energy storage systems because of their high energy density and specific capacity. However, the shuttle effect and slow reaction kinetics of the intermediate lithium polysulfide (LiPSs) result in fast capacity fading. Herein, multicomponent synergy nitrogen-doped carbon nanotube (CNT) framework dotted by CoFe/FeN 0.0324 /TiN heterostructure (CoFe/FeN 0.0324 /TiN@N-CNT) were developed and prepared by in-situ nitridation approach as polysulfide mediator to simultaneously realize physicochemical adsorption and catalytic conversion of polysulfide. Transition metal nitrides, such as FeN 0.0324 , are known for their polar surfaces that can chemically adsorb polysulfides efficiently. Additionally, CoFe and TiN have been shown to catalyze polysulfide redox reactions. This understanding paves the way for the development of heterostructured CoFe/FeN 0.0324 /TiN nanoparticles that significantly enhance the immobilization, diffusion, and transformation of polysulfides. Moreover, nitrogen-doped carbon nanotubes (CNTs) decorated with bimetallic CoFe afford intriguing benefits. The CoFe alloy not only facilitates the in-situ growth of CNTs but also contributes to prominent Li + /electron conductivity. Together, CoFe and CNTs provide substantial physical confinement and catalytic sites, thereby accelerating redox kinetics and effectively mitigating the shuttle effect. Owing to these advantages, CoFe/FeN 0.0324 /TiN@N-CNT separators exhibit remarkable electrochemical properties including superior rate capacity of 738 mAh g −1 at 3C, high reversible capacity of 708 mAh g −1 at 0.5C after 400 cycles and 607 mAh g −1 at 1C after 1000 cycles with per cycle declining rate of 0.09 % and 0.048 %, respectively, and ultralong cycle life at 4C after 1000 cycle. Even with a relatively high sulfur loading of 2.3 mg, the modified batteries still exhibit a satisfactory reversible capacity at 0.5C. This work paves a unique avenue combined prudent spacial framework with heterogeneous synergy strategy for manufacturing high-energy–density Li-S batteries.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
·
2023
·Vol. 54
·期 11
·4332-4341
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IF 2.8
Li Hang,Dong Longhao,Duan Hongjuan,Huang Zhong,Li Yage,Liu Xuefeng,Huang Ren,Jia Quanli,Ye Hang,Zhang Haijun,Zhang Shaowei
Non-oxide ceramic aerogel draws increasing attention in area of thermal insulation because of its low density, high temperature resistance and good chemical/thermal stability. Here, a BCN-TiN composite aerogel was prepared by an in-situ carbothermal reduction/nitridation method, using melamine (C 3 N 6 H 6 ), boric acid (H 3 BO 3 ), chitosan ((C 6 H 11 NO 4 ) n ) and titanium dioxide (TiO 2 ) as raw materials. The aerogel prepared at 1473 K showed a porosity high up to 97.6 pct with a density of 0.05 g/cm 3 . When testing at a temperature of 673 K, the thermal conductivity value of as-obtained composite aerogel was as low as 0.135 W/(m K). Moreover, the lightweight BCN-TiN aerogel had the high-temperature stability (at least 1473 K) and good compression strength, which ensures it a potential high-temperature insulation material in inert atmosphere. Graphical Abstract
研究领域:
材料科学
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热能工程
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2023
·
IF 8.7
Jin Wen,Qingchao Chang,Jishi Zhu,Rui Cui,Cheng He,Xinxing Yan,Xiaoke Li
The selection of heat transfer medium is indispensable for the efficient realization of photothermal conversion. Nanofluids , thanks to their enhanced thermal properties and possible heat transfer applications, have been a topic of intense research. Also, nanofluid is an ideal working fluid for direct absorption solar collectors (DASCs). In this work, the stable ZrC/TiN nanofluids with high light absorption was prepared while a new irradiation mode was used to improve the photothermal conversion efficiency. Firstly, the composite optical characteristics of ZrC/TiN nanoparticles were numerically simulated by the finite-difference time-domain (FDTD) method. With the localized surface plasmon resonance (LSPR) effect by nano-TiN and the strong absorption exhibited by nano-ZrC, the 160 ppm ZrC/TiN nanofluids can achieve nearly 100% solar energy with a light distance of 1 cm. Secondly, the solar-to-thermal conversion efficiency of 160 ppm ZrC/TiN nanofluids was up to 73.7% though the side radiation, which was about 31% higher compared to the base fluids. In addition, this special flow model allows a lower temperature difference inside the ZrC/TiN nanofluids. Simulations and experiments showed that the ZrC/TiN nanofluids with the new irradiation mode has a relatively outstanding photothermal conversion capability, revealing the application prospects and potential of ZrC/TiN nanofluids in DASCs.
研究领域:
材料科学
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能源工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
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2022
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IF 8.634
Jin Wen,Xiaoke Li,He Zhang,Meijie Chen,Xiaohu Wu
The heat exchange medium moderately determines the heat utilization efficiency of solar energy. Nanofluids , a type of working fluids with high thermal conductivity and strong light absorption, have been studied and applied to improve solar energy utilization. In this study, TiN@SiCw binary composite nanoparticles were prepared by a coupling agent method. The optical coupling absorption properties of TiN and SiCw nanoparticles were numerically simulated by the finite-difference time-domain method. Results showed the TiN@SiCw nanostructure can improve the width and intensity of spectral absorption. Then TiN@SiCw and SiCw nanofluids based on ethylene glycol were prepared by a two-step method and studied experimentally in terms of thermal conductivity and optical absorption. The photothermal conversion efficiency of the nanofluids was measured by a special flow and photothermal coupling model (side radiation). Experiments showed the thermal conductivity and light absorption of TiN@SiCw composite nanofluids were stronger than those of SiCw single-component nanofluids and the base fluid. Specifically, the energy absorption fraction and the photo-thermal efficiency of TiN@SiCw nanofluids at the highest concentration of 140 ppm were 96.2% and 90.5%, respectively, which were 12.1% and 21.7% higher respectively compared with SiCw nanofluids. Hence, the TiN@SiCw nanofluids are suitable for enhancing the efficiency of solar collectors.
研究领域:
能源科学
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材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2019
·
IF 7.279
Baosong Li,Tianyong Mei,Dandan Li,Shengsong Du
Ni-Cu/TiN nanocomposites were electrodeposited by incorporation of TiN nanoparticles in Ni-Cu matrix from sulphate-citrate bath with additives. Ultrasonic assistance was performed in an external ultrasonic bath at ultrasonic frequency of 40 KHz and acoustic power of 300 W. The effects of current density on surface morphology, structural and electrochemical properties of Ni-Cu/TiN nanocomposites were examined. Results indicated that the presence of TiN changes the texture of nickel coating. Corrosion resistance of the composite deposit was enhanced by ultrasonic-assisted electrodeposition. The average roughness value ( R a ) of Ni-Cu/TiN is 26–34 nm, which is rougher than Ni-Cu alloy ( R a = 4–5 nm). Not only the ultrasonic agitation, but also the current density affects the corrosion properties of the products. Ni-Cu/TiN nanocomposite electrodeposited at 5 A dm −2 has the highest corrosion resistance.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 21
·4610-4617
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IF 5.686
Yifei Yang,Linsen Zhou,Jun Chen,Ruizhi Qiu,Yunxi Yao
Graphical Highly dispersed Pt clusters supported on TiN substrates favor the formation of highly reactive dual sites. Molecular O 2 dissociatively adsorbs on the Ti−Ti bridge sites to form titanium oxynitride (TiN x O y ) skin and the oxygen atom binding on Ti sites readily react with the adjacent CO adsorbed on Pt to attain the catalytic cycle. The interfacial synergistic effect between Pt and TiN results in superior performance in the low-temperature CO oxidation. The metal-support interfacial synergistic catalysis allows the competitive reaction steps to occur in close proximity at different sites, thus decreasing the activation barrier and improving the catalytic efficiency. Combining the structural characterization, reactivity assessments and density functional theory (DFT) calculations, it is found that highly dispersed Pt clusters on TiN substrates favor the formation of Pt−TiN interfacial dual sites, which are highly reactive for the low-temperature CO oxidation with an apparent activation energy as low as 38.7 kJ mol −1 , much less than that on the traditional Pt/TiO 2 or Pt/SiO 2 catalysts. At low temperature, the surface sites of Pt are saturated with CO adsorption due to its high adsorption energy and the molecular O 2 dissociatively adsorbs on the Ti sites to form the titanium oxynitride (TiN x O y ) skin with a low barrier of 0.1 eV. The O atoms binding on Ti sites readily react with the adjacent CO molecules adsorbed on the perimeter of Pt clusters to attain a catalytic cycle with a reaction barrier of 0.5 eV. The interfacial synergistic effect between Pt and TiN is the origin of the low temperature CO oxidation activity on the metal-nitride catalysts.
研究领域:
催化
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材料科学
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化学工程
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表面化学
✓ 已验证
DOI
高影响因子
INFRARED PHYSICS & TECHNOLOGY
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2025
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IF 3.4
Yu Xie,Quanjiang Lv,Tingzhen Chen,Dongliang Zhang,Siwei Liu,Haigang Hou,Guiwu Liu,Guanjun Qiao,Junlin Liu
Porous carbon black loaded with TiN nanoparticles was developed as a broadband infrared (IR) absorber. The unique porous structure, characterized by variable pore sizes and random spatial distribution, effectively guides and absorbs electromagnetic waves across a broad wavelength range. The incorporation of TiN nanoparticles enhance the surface roughness, facilitating multiple reflection and scattering, thereby extending the light propagation path. This modification notably addresses the absorption deficiencies in the 3.5–6 μm wavelength range, significantly improving overall absorption efficiency. IR absorption tests revealed that the original film achieved an average absorption rate of approximately 93.7 % within the 2.5–20 μm range, while the addition of TiN nanoparticles increased the absorption rate to 95.73 %. Finite-difference time-domain simulations results demonstrated a significant increase in electric field intensity around the carbon surface and TiN nanoparticles at 5 μm, attributed to the radiative absorption properties of carbon and the surface plasmon characteristics of TiN at shorter wavelengths. This absorber layer shows high potential for IR sensor applications.
研究领域:
材料科学
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光学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Xuan Yu,Xu Liu,Jinyan Zhao,Mingzhe Xue,Huaijie Shi,Chenghang Jiang,Jia Liu,Yufeng Xue,Fengying Gao,Xing Zhong,Zihao Yao,Jianguo Wang
Electrochemical ozone production (EOP) is a technology with great promise for ozone synthesis, where electrochemical anode and cathode reactions play key roles in electrolytic ozone generators. In this work, mesoporous three-dimensional Pt/TiN nanorods (NRs) have been designed and prepared for EOP and HER, exhibited impressive performance with the faraday efficiency of the anodic EOP was 13 %. The overpotential of cathodic HER was 38 mV at 10 mA·cm −2 with 0.5 M H 2 SO 4 . The porous structure of Pt/TiN NRs provides microenvironments favorable for enrichment of reaction intermediates, accelerating the kinetic processes of EOP and HER. Theoretical calculations have revealed that metal-support interactions (MSI) between Pt and TiN play an influential role in the adsorption of reactive intermediates. Furthermore, promising efficiencies in the electrochemical degradation of organic pollutants have been investigated, highlighting the potential application of the Pt/TiN NRs-1 || Pt/TiN NRs-2 in advanced electrochemical oxidation.
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
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Baocang Liu,Lili Huo,Geng Zhang,Jun Zhang
A novel hollow mesoporous TiN/N-graphene (N-G) hybrid architecture (@M-TiN/N-G) composed of N-doped graphene wrapped mesoporous TiN nanoparticle shells was constructed for the first time. It can be used as an efficient support for creating a highly efficient ternary @M-TiN/N-G/Pt electrocatalyst with superior catalytic activity and stability for methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) through decorating well-dispersed Pt nanoparticles on @M-TiN/N-G surface. By optimizing the content of N-G in catalysts, the @M-TiN/N-G/Pt catalysts display superior catalytic activity and stability toward MOR and ORR to traditional Pt/C and graphene-free Pt/TiN and @M-TiN/Pt catalysts. The various characterization results reveal that the outstanding electrocatalytic performance of @M-TiN/N-G/Pt catalyst roots in its large surface area, high porosity, strong interaction among Pt, TiN, and N-G, excellent electron transfer property facilitated by N-doped graphene, and small size of Pt and TiN nanocrystals. The synthetic approach may be available for constructing other graphene based hollow metal nitrides, carbides, and phosphides for various electrocatalytic applications.
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
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2022
·
IF 4.804
Chen Chao,Mo Peicheng,Chen Jiarong,Hu Xixi,Hu Qiaofan,Lin Feng,Wu Yi
Using TiN-Ti-AlN as the binder, polycrystalline cubic boron nitride (PCBN) composites containing Y 2 O 3 and not containing Y 2 O 3 were prepared under high temperature and ultra-high pressure conditions, respectively. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to analyze the phase composition, microstructure and surface crack morphology of the composite material. At the same time, the compactness, microhardness and bending strength of the composite material were tested. The research results show that the phase composition of PCBN sample is mainly composed of BN, TiB 2 , TiN, AlN and Y 2 O 3 at an ultra-high pressure of 5.5 GPa and a temperature of 1500 °C. With the increase of Y 2 O 3 content, the relative density of PCBN first increases and then decreases, and the changes in mechanical properties also tend to be similar. As the content of Y 2 O 3 increases, it can be seen that the peak intensity of the main peak of TiB 2 also increases, indicating that the addition of Y 2 O 3 promotes the reaction between cBN and Ti. When the Y 2 O 3 content is 3.6%, PCBN has the best comprehensive mechanical properties, with a microhardness of 34.56 GPa and a bending strength of 890 MPa.
研究领域:
材料科学
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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）