JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Hongxiang Kuai,Chuang Ji,Xiangdong Ma,Xunhui Xiong,Shengkui Zhong
Black phosphorus (BP) anode has received extensive attentions for lithium-ion batteries (LIBs) due to its ultrahigh theoretical specific capacity (2596 mAh g −1 ) and superior electronic conductivity (≈10 2 S m −1 ). However, the enormous volume variations during lithiation/delitiation processes greatly limit its applications. Herein, a new BP-titanium disulfide-graphite (BP-TiS 2 -G) nanocomposite composed of BP, titanium disulfide and graphite has been prepared by a facile and scalable high-energy ball milling method. The experimental data proves that P C and P S bonds have been successfully introduced at the interface, which can effectively maintain the structural integrity of the BP-TiS 2 -G electrode when evaluated as an anode material for LIBs. In addition, lithium-ion diffusion kinetics have been demonstrated to be enhanced from the synergistic effect of P C and P S bonds. As a result, the BP-TiS 2 -G anode shows outstanding cycling stability (906.2 mAh g −1 after 1300 cycles at 1.0 A g −1 ) and superior rate performance (313.8 mAh g −1 at 10.0 A g −1 ). Our work shows the synergistic effects of different chemical bonds to stabilize BP can be a potential strategy for the development of high-performance alloy-type anodes for rechargeable batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2025
·
IF 5.5
Xinxin Xia,Cheng Zhang,Wenyi Lai,Zhenglin Zou,Peigen Zhang,Jingwen Tang,Ying Guan,Shuang Tian,Balázs Illés,ZhengMing Sun
The spontaneous growth of metal whiskers has long posed reliability challenges in electronic devices, often resulting in short-circuit failures. Recent findings on the rapid and extensive formation of tin (Sn) whiskers on Ti₂SnC substrates underscore the critical role of atomized Sn in whisker growth. In this study, mechanochemically decomposed Ti₂SnC, capable of quantitatively and efficiently generating large amounts of atomized Sn, was implanted to Sn, Bi, and Pb metal matrices. After three days of being annealed at 60 °C, numerous whiskers grown on all implanted matrices, proving the critical role of atomized Sn in whisker growth. Notably, SnBi bimetallic and solid solution whiskers were detected. TEM analysis proved that the formation of SnBi whiskers was caused by the released latent heat of crystallizing atomized Sn, which creates SnBi micro-melt pools at the interface, facilitating interface flow and supplying the necessary constituents for SnBi bimetallic and solid solution whisker formation. Likewise, SnPb bimetallic whiskers were observed in Pb matrices implanted with the mechanochemical decomposed Ti 2 SnC. These findings provide two contrasting strategies for future applications: effectively suppressing whisker formation and intentionally synthesizing bimetallic nanowires.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Baogang Ding,Yunpeng Qu,Kai Sun,Runhua Fan
Epsilon-negative ( ? ′ < 0) and epsilon-near-zero (ENZ) property was demonstrated in titanium carbide/copper calcium titanate (TiC/CCTO) metacomposites. Benefiting from the moderate concentration of free electrons in TiC filler and its adjustable three-dimensional (3D) networks, weakly negative permittivity ( ∼ − 200 at 20 MHz) was achieved. Not only that, tailoring the negative permittivity of metacomposites from ∼ − 200 to ∼ − 2060, ∼ − 4200, ∼ − 14000 and ∼ − 70000 at 20 MHz was realized by simply increasing TiC content. Besides, Drude model was used to explain the radio-frequency (RF) negative permittivity and quantified the collective plasma oscillation in TiC networks.
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 ANALYTICAL AND APPLIED PYROLYSIS
·
2017
·
IF 3.471
Xu Chen,Haiping Yang,Yingquan Chen,Wei Chen,Tingzhou Lei,Wennan Zhang,Hanping Chen
Furfural is a valuable chemical, the production of furfural from renewable biomass resources becomes more attractive in recent years. In this study, biomass fast pyrolysis with heterogeneous catalysts (titanium compounds (TiN, TiO 2 and TiOSO 4 ) and metal nitrides (MoN, GaN and VN)) for furfural production was investigated experimentally by means of pyrolysis-gas chromatography/mass-spectrometry (Py-GC/MS). The measurement results indicated that TiN and GaN promoted the furfural compounds production notably mainly through direct decomposition of oligosaccharides. The formation of furfural was promoted when the amount of TiN was increased, and the yield of furfural formed was about 5.5 times the size of that from non-catalytic pyrolysis when TiN/cellulose mass ratio was 4. The furfural yield decreased when the pyrolysis residence time increased from 10 to 30 s, which suggests competitive reactions (formation of 1, 6-anhydro-beta.- d -glucopyranose) against the formation of furfural. TiN, as a catalyst for fast pyrolysis towards furfural production, can be well applied to agriculture biomass residues. Comparing three biomass residues: corncob, wheat straw and cotton stalk, corncob showed higher furfural yield due to the higher holocellulose content, while wheat straw showed higher furfural selectivity.
研究领域:
能源与环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
C. Jiang,X. Wang,X. Xiao,M. Piao,Y. Jia,J. He,L. Hu,Y. Zou,L. Sun,L. Chen
Chemical complex borohydride is a promising hydrogen storage material due to its large gravimetric and volumetric hydrogen capacities. However, the high dehydrogenation temperature and sluggish kinetics still place strong restrictions on its practical application in the hydrogen storage field. In this work, a synergetic approach of partial cation substitution and catalysis is developed to enhance the hydrogen storage properties of LiBH 4 . The Li/Mg based dual-cation borohydride (LiMg 2 (BH 4 ) 5 , LMBH) was successfully synthesized by wet chemical ball milling of LiBH 4 and MgCl 2 . The optimal (LMBH (4.5:1) sample, LiBH 4 and MgCl 2 in molar ratios of 4.5:1, possesses a maximum hydrogen desorption capacity (11.27 wt%) and the outstanding initial decomposition temperature (∼250 °C). Importantly, the LMBH (4.5:1) doped with TiF 3 shows a remarkable onset dehydrogenation temperature as low as 97.2 °C, which is about 190 °C lower than that of pristine LiBH 4 . The LMBH (4.5:1) doped with TiF 3 system releases 7.98 wt% H 2 within 170 min below 350 °C. And the dehydrogenation product of doped composite can reversibly absorb ∼4.72 wt% H 2 at a relatively moderate temperature of 280 °C, which is substantially lower than the reversible hydrogen absorption temperature of previous modified borohydride systems. Based on the structural characteristic analyses, the TiF 3 reacts with LMBH (4.5:1) to in-situ form actual catalytic components of TiB 2 and TiH 2 as the actual catalysts for LMBH (4.5:1), resulting in the improved hydrogen re/dehydrogenation properties. The synergetic modification of Li/Mg dual-cation substitution and TiB 2 /TiH 2 catalysis may lead to the development of light-metal borohydrides with outstanding hydrogen storage properties.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Qizhi Dong,Meiling Huang,Cancheng Guo,Gang Yu,Mimi Wu
There is significant interest in developing new catalyst supports such as metal carbides to overcome the electrochemical corrosion problem of traditional high surface area carbon. A key challenge is the dispersion and stability of the catalysts on the non-carbon based materials. This paper reports a new approach to functionalize titanium carbide by poly (diallyldimethylammonium chloride) (PDDA), investigated as a new catalyst support for Pd catalyzed electrochemical reaction . Thermal gravimetric analysis confirmed the successful noncovalent functionalization of TiC by PDDA. Pd nanoparticles are deposited in situ on the PDDA-wrapped TiC surface through electrostatic interactions mechanism. According to transmission electron microscopy (TEM) observations, Pd nanoparticles with a mean size of ∼2.9 nm are homogeneously deposited on TiC(P). Among all the samples tested, the Pd/TiC(P) catalysts exhibit the highest resistance to CO poisoning, catalytic activity and stability towards formic acid electrooxidation . This performance was attributed to a strong Pd↔TiC interaction and the formation of oxygenated species on the TiC.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Laizhao Guo,Shaojie Chu,Yun Li,Wentao Huang,Xiang Wang
Kiwifruit, renowned for its antioxidant properties and nutritional richness, faces challenges in maintaining quality during transportation, often leading to suboptimal products reaching the market. To address this issue, a wireless transmission flexible ethylene monitoring device (WFEMD) was developed. This device comprises a flexible ethylene gas sensor and a signal transmission processing unit integrated with electronic components, enabling real-time monitoring capabilities. In this study, the catalytic activity of Pd and Pd/Ti heterojunctions was leveraged to enhance the ethylene gas sensing. The impact of Ti3C2Tx modified with varying masses of Pd nanoparticles on ethylene gas response levels was investigated. The signal transmission processing unit, fabricated by using the laser direct-writing method, was optimized to collect signals from the flexible ethylene gas sensor, convert them into corresponding ethylene concentrations, and transmit data via an antenna. By introducing a random forest (RF) classification algorithm, a remarkable 97.5% accuracy in predicting kiwifruit ripeness grades was achieved. The algorithm facilitated precise classification by collecting key parameters such as ethylene and CO2 during transportation. The WFEMD enables real-time acquisition of kiwifruit ethylene gas information, which is transmitted wirelessly for data visualization and traceability via mobile terminals. This empowers managers with timely insights into ethylene emissions and ripeness predictions, facilitating informed decision-making processes.
研究领域:
食品科学
·
材料科学
·
传感技术
✓ 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）