NANOTECHNOLOGY
·
2025
·Vol. 36
·期 13
·135402
·
IF 2.8
Yao He,Lijing Wang,Sheng Yang,Shaowei Zhang,Hongfang Du,Dandan Cui,Liangxu Lin
In lithium–sulfur batteries (LSBs), the dissolution of lithium polysulfides (LiPSs) triggers the shuttle effect to lose active materials irreversibly, leading to the fast deterioration of electrochemical performance. Rational designs on the separator membrane could mitigate the shuttle effect. However, the development of efficient separators economically remains a challenging task, aggressively limiting the commercial use of LSBs. This work reports the engineering of commercial molybdenum diselenides (MoSe2) flakes to mitigate the shuttle effect of LSBs, by forming rich Se vacancies via a potassium (K) intercalation and de-intercalation reaction. The Se vacancy in MoSex flakes significantly enhances the adsorption capacity of LiPSs and accelerates the Li+ diffusion kinetics, thereby alleviating the shuttle effect and enhancing the energy storage performance. This directly improves the energy storage performance of the LSBs by incorporating the MoSex flakes into the separator membrane, giving a high capacity retention rate of 94.6% at 2 C after 500 cycles, with a reversible specific capacity as high as 452 mAh g−1. This work offers a new strategy for the design and synthesis of vacancy rich transition metal chalcogenides for high-performance LSBs and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Mingshu Xiao,Yuqing Miao,Yanping Tian,Yuhua Yan
A new catalyst based on Co-P-Se compound that is comprised entirely of cheap and earthabundant elements, was first reported for electrolytic hydrogen production . The hydrothermal method at only 473 K was employed to prepare the nanoparticles (NPs) of Co-P-Se compound. The transmission electron microscope images reveal the nanoparticles of quasis-spherical structure and extremely small size with an average diameter of around 5 nm. The composites of Co-P-Se NPs and multi-walled carbon nanotubes (MWCNT) was loaded onto the electrode surface as an active hydrogen evolution reaction (HER) electrocatalyst , which is observed using a scanning electron microscopy. The electrochemical study shows that MWCNT helps to load more Co-P-Se catalysts and enhance the electron transfer between catalysts and electrode, and Co-P-Se exhibits more catalytic activity than Co-P or Co-Se alone. A small Tafel slope of 46 mV/dec and good acid stability was observed for the hydrogen evolution reaction of Co-P-Se/MWCNT.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Zong-Dong Sun,Yang Chi,Sheng-Ping Guo
Three europium chalcogenides , Cu 2 EuSiS 4 ( 1 ), Cu 2 EuGeS 4 ( 2 ), and Cu 2 EuGeSe 4 ( 3 ) were obtained by a high-temperature solid-state method. They crystallize in the noncentrosymmetric space groups P 3 1 21 ( 1 ), P 3 2 21 ( 2 ), and Ama 2 ( 3 ), respectively. Their structures can be described as EuQ 8 bicapped trigonal prisms ( btp s) constructed 3 D frameworks, and Cu and Si/Ge atoms occupying the tetrahedral cavities. The 3 D network built by CuQ 4 and Si/GeQ. 4 tetrahedra in 3 is different from that in 1 and 2 . Their energy band gaps are determined to 2.36, 2.32, and 1.74 eV for 1 – 3 , respectively. Compound 1 shows typical photoluminescence of Eu 2+ ion. All of them show antiferromagnetic-like behaviors, and are not second-harmonic generation-active. Theoretical calculations indicate that 1 and 2 show direct band gaps, while 3 indirect.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Yi-Xun Liu,Yu-Ting Xiong,Lin-Dong Wang,Yi-Qi Fan,Liang Wu,Hemdan S. H. Mohamed,Zhi-Yi Hu,Yu Li,Bao-Lian Su
Lithium-selenium (Li-Se) batteries have garnered significant attention recently due to their high energy density. However, selenium cathodes still face challenges such as poor conductivity and severe volume expansion. In this study, we design a novel two-dimensional nitrogen-doped lamellar porous selenium/carbon composite cathode material (Se@NLPC-P) for high performance Li-Se battery. Our results show that the lamellar structure assembled from biomass-derived stacked nitrogen-doped carbon nanosheets, possesses abundant active sites and hierarchical porosity with strong anchoring capability for selenium species. Such a unique structure additionally facilitates electron/ion transfer. Consequently, the Se@NLPC-P cathode retains a reversible capacity of 578 mAh g-1 at 0.5 C after 500 cycles, exhibiting superior rate performance and rapid reaction kinetics. This strategy on design of biomass-derived lamellar porous carbon hosts via a molecular structure-directing provides new insights for enhanced performance of Li-Se batteries.
✓ 已验证
DOI
高影响因子
Small Methods
·
2019
·Vol. 3
·期 12
·1900349
·
IF 0
Ye Zhang,Feng Zhang,Yiguo Xu,Weichun Huang,Leiming Wu,Zhijun Dong,Yupeng Zhang,Biqing Dong,Xiuwen Zhang,Han Zhang
Heterojunctions, composed of different materials, are widely explored in optoelectronic devices thanks to their unique advantages, such as high carrier mobility and excellent photoelectronic characteristics. In this work, Bi 2 Se 3 /Te@Se heterojunctions (Bi 2 Se 3 /Te@Se) are synthesized through the epitaxial growth of Bi 2 Se 3 nanosheets (Bi 2 Se 3 NTs) on tellurium@selenium nanotubes (Te@Se NTs) by using a low-cost and facile solvothermal process. Bi 2 Se 3 /Te@Se are further applied in high-performance photoelectrochemical (PEC)-type photodetection due to the advantages of broadband optical response and fast carrier relaxation time. The PEC results demonstrate that the as-prepared photodetectors have pronounced photoresponse behavior from the ultraviolet to visible band with self-driven ability and excellent long-term stability. It is anticipated that this work provides a new strategy for epitaxial growth of topological insulators on semiconductors for designing new heterojunctions toward high-performance optoelectronic devices.
✓ 已验证
DOI
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Liming Xiao,Fangyuan Yu,Ping Sun,Xiaodong Wang,Linmao Wen,Yunzi Ren,Feng Cao,Jun Mao,Qian Zhang
With the rapid development of the Internet of Things (IoT), there has been a significant surge in demand for flexible power supply. However, most existing solutions still face challenges in delivering both a continuous, stable energy supply and excellent mechanical adaptability.Herein, we report a Ag2Se network fabricated via a single-step electrodeposition process, which enables continuous regulation of porosity in the range of 75%-99%. This method leads to the formation of a highly interconnected porous architecture. The optimized network with 92% porosity demonstrates a synergistic enhancement of thermoelectric and mechanical properties, achieving a zT value of 0.38 and excellent strain stability, with only a 6.4% increase in resistance after 1000 compressive cycles. The single-leg device based on this material delivers a high power density of 181.5 μW cm -2 under a temperature difference of 40 K. In comparison, a denser network with 86% porosity, while mechanically rigid, achieves a room-temperature zT of 1.0, outperforming most bulk Ag2Se thermoelectric materials. This work provides an effective strategy to coordinate thermoelectric performance and mechanical flexibility through structural porosity modulation, paving the way for advanced wearable self-powered technologies.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 21
·6538-6544
·
IF 5.236
Yi Huang,Le Gao,HaoHai Yu,Zhihua Yang,Junjie Li,Shilie Pan
Graphical Laser damage limitation : Promising ternary infrared nonlinear optical (NLO) materials, Na 6 MQ 4 (M=Zn, Cd; Q=S, Se), with unique [NaQ 4 ] NLO-active groups, are successfully prepared. Theoretical calculations and statistical analyses indicate that the second-harmonic generation effect and band gap in the compounds originate mainly from the distorted NaQ 4 NLO-active units with a short Na−S bond length. Four sodium-based ternary IR nonlinear optical (NLO) materials, Na 6 MQ 4 (M=Zn, Cd; Q=S, Se), were prepared through a high-temperature flux method. The crystal structure of the compounds is built up of isolated [MQ 4 ] tetrahedra and a 3D framework formed by the NaQ n ( n =4, 5) units. The two selenides, Na 6 MSe 4 (M=Zn, Cd), as promising IR NLO materials, show moderate second-harmonic generation (SHG) responses (0.9 and 0.5×AgGaS 2 ) with good phase-matching behavior, as well as high laser damage thresholds (2 and 1.9×AgGaS 2 ). The two sulfides, Na 6 MS 4 (M=Zn, Cd), exhibit higher laser damage thresholds (13 and 4×AgGaS 2 ), but smaller SHG responses (0.3 and 0.2×AgGaS 2 ). Theoretical calculations and statistical analyses indicate that the SHG effect and band gap in the compounds originate mainly from the distorted NaQ 4 NLO-active units with a short Na−S bond length, which provides a new insight into the design of novel IR NLO materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2015
·
IF 1.698
Huacheng Cai,Wendong Wang,Peiwen Liu,Guangming Wang,Ankang Liu,Zhe He,Zhaofang Cheng,Shengli Zhang,Minggang Xia
We demonstrate tin (Sn) nanowires growth enhanced by Selenium (Se) atoms via physical vapor transport (PVT) method. The Raman spectroscopy, X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy show that Sn nanowires are synthesized with a large quantity, good quality and high purity of Sn. The growth of Sn nanowires is attributed to Solid–Vapor–Liquid mechanism. The effects of gold nanoparticles catalyst, Si substrate, and Se atoms on Sn nanowires growth are discussed in detail. We find that Se atom plays a key role in the growth of Sn nanowires. The gaseous Sn atoms are absorbed by the eutectic alloy droplets of Se–Au at first. Then Sn atoms precipitate at the liquid–solid phase interface due to a supersaturated solution and form a one-dimensional nanostructure. In all, this PVT method could provide a simple and quick way to synthesize monocrystalline Sn nanowires with an advantage in both quality and quantity. The optical transmittance of Sn nanowires thin film with 2 μm 2 density approaches 85–90% in visible wavelength. Therefore, the Sn nanowires thin film can be applied to transparent electrode along with their metallic property.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Yong Cui,Zhe Zhang,Xu Du,Wei Liu,Shi Liu,Yulin Deng,Xiaogu Huang,Gang Wang
Hybrid solution process is a powerful liquid deposited strategy merging the advantage of molecular precursor solution and nanocrystals ink. A novel hybrid solution approach is presented to fabricate Cu(In,Ga)(S,Se) 2 (CIGSSe) absorber layer using fully dissolved CIGS precursor solution and the CIGS nanocrystals. Such attractive strategy could significantly improve the single deposited thickness and enhance the quality of as-prepared CIGS film compared with the pure CIGS molecular precursor solution and the CIGS nanocrystals ink. Photovoltaic absorber layers based on CIGSSe chalcopyrite structure show the high-quality microstructural performance and are incorporated into solar cells with power conversion efficiency of 10.19%. The high performance of resulted optoelectronic devices represents a chance to extend the hybrid solution process to other inorganic semiconductor thin film solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yaoping Hu,Zhijin Gao
Crystal violet (CV), a hazardous dye, poses a serious threat to the environment and human health. This motivates us to develop a facile method for its sensitive detection. Herein, we demonstrate a rapid sensing of CV using a novel fluorescent nanomaterial, yellow emissive Se,N-codoped carbon dots (CDs). CDs with an intense photoluminescence peak at 566 nm are synthesized by a hydrothermal technique using selenourea and o-phenylenediamine as precursors. This material shows a high quantum yield of up to 16.7 %. It is found that the yellow fluorescence of CDs can be selectively quenched by CV, which makes them promising for CV sensing. The linearity is obeyed in the range of 0.02–1.60 μM, and the limit of detection is as low as 7.3 nM. After detailed investigations, the inner filter effect is proposed to be the sensing mechanism. For practical usage, the newly built method is applied to determine the trace amount of CV in fish tissue samples, and satisfactory results are obtained.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 7
·1-8
·
IF 2.101
Zhao Chenhao,Fang Shuzhen,Hu Zhibiao,Qiu Sheng’en,Liu Kaiyu
The carbon substrate with unique 3D macroporous structure has been prepared through the immediate carbonization of ethylenediaminetetraacetic acid (EDTA) and KOH mixture. The porous carbon composed of micro- and small mesoporous (2–5 nm) structure has a BET specific surface area of 1824.8 m 2 g −1 . The amorphous and nanosized Se is uniformly encapsulated into the porous structure of porous carbon using melting diffusion route, and the weight content of Se in target Se/C composite can be as high as ~50 %. As an Li–Se battery cathode, the Se/C composite delivers a reversible (2nd) discharge capacity of 597.4 mAh g −1 at 0.24C and retains a discharge capacity of 538.4 mAh g −1 at 0.24C after 100 cycles. Furthermore, the composite also has a stable capacity of 291.0 mAh g −1 at a high current of 4.8C. The high specific area and good porous size of EDTA-derived carbon substrate may a be responsibility for the excellent electrochemical performances of Se/C composite.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Lijian Huang,Song Wei,Daocheng Pan
Large-grained Cu2ZnSn(S,Se)4 (CZTSSe) absorber layers are highly desirable for high-performance CZTSSe thin film solar cells. However, solution-deposited CZTSSe thin films usually consist of a large-grained top layer and a smaller-grained bottom layer. In this work, we adopt a phase-separation strategy to promote the crystal growth of the CZTSSe thin film. By choosing ZnCl2, SnCl2, CuCl (instead of CuCl2), and thiourea as the starting materials, a Cu2S/SnS/ZnS hybrid precursor thin film can be prepared, the composition of which has been testified by X-ray diffraction, X-ray photoelectron spectroscopy, Raman, and scanning electron microscopy-energy-dispersive spectrometry characterization. Owing to the volume expansion caused by Se incorporation and the high migration abilities of Cu(I) and Sn(II) ions during selenization, large-grained and compact CZTSSe films with a thickness up to 5 μm can be obtained. The corresponding thin film solar cell devices have achieved active power conversion efficiencies above 10% (8.78% for total area), much higher than those of CuCl2-based CZTSSe devices in our lab.
研究领域:
材料科学
·
能源科学
·
薄膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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