Journal of Energy Storage
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2023
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IF 9.4
Ling Wang,Miaoling Hu,Changzheng Lin,Jiangtao Feng,Wei Yan
Transition metal chalcogenide anodes have attracted significant attention for sodium-ion batteries (SIBs) owing to their relatively high theoretical capacity. However, the inherently poor electronic conductivity and rate performance hinder their practical application. In this study, hierarchically structured CoSe 2 /TiN/nitrogen-doped carbon nanofibers wrapped with in-situ grown carbon nanotubes (CNTs) on the surface (denoted as CoSe 2 @N-TCF/CNTs) are designed and fabricated as binder-free anodes for SIBs. The rational design can effectively avoid the agglomeration of CoSe 2 nanoparticles, improve the conductivity of the composite materials, provide enough space for electrolyte penetration and volume expansion during the cycling process and shorten the transmission paths of electrons and Na + . With these structural and compositional advantages, the as-obtained hierarchical CoSe 2 @N-TCF/CNTs deliver a high reversible capacity of 401.2 mAh g −1 after 1000 cycles at 0.2 A g −1 and maintained at 353.7 mAh g −1 even at a high current density of 2 A g −1 when directly used as a binder-free anode for SIBs. The superior sodium-ion storage performance can be attributed to the decreased charge transfer resistance , improved Na + diffusion rate and the pseudocapacitance behavior, as is evidenced by kinetics analysis .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Haonan Wang,Kaifeng Yu,Pengtao Wang,Pengcheng Jia,Yongzhi Yuan,Ce Liang
Metal-organic frameworks (MOFs) have the advantages of controllable chemical properties, rich pore structures and reaction sites and are expected to be high-performance anode materials for the next generation of potassium-ion batteries (PIBs). However, due to the large radius of potassium ions, the pure MOF crystal structure is prone to collapse during ion insertion and processing, so its electrochemical performance is quite limited. In this work, a hollow carbon sphere-supported MOF-derived Co/CoSe heterojunction anode material for potassium-ion batteries was developed by a hydrothermal method . The anode has high potassium storage capacity (461.9 mA h/g after 200 cycles at 1 A/g), excellent cycling stability and superior rate performance. It is worth noting that the potassium ion storage capacity of the anode material shows a gradual upward trend with the charge–discharge cycle, which is 145.9 mA h/g after 3000 cycles at a current density of 10 A/g. This work demonstrates that MOF-derived CoSe anodes with high capacity and low cost may be promising candidates for the introduction of potassium ion storage.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Haorui Dong,Haiyan Zhao,Tongtong Xuan,Wenhao Bai,Tianyu Lin,Yixin Cai,Rong-Jun Xie
Lead halide perovskite nanocrystals (NCs) have been the star material in lighting and displays owing to their excellent photoelectrical properties, but they have not simultaneously realized high photoluminescence quantum yield (PLQY) and high stability. To solve this problem, we propose a perovskite/linear low-density polyethylene (perovskite/LLDPE) core/shell NC by the synergistic role of the pressure effect and steric effect. Green CsPbBr3/LLDPE core/shell NCs with near-unity PLQY and nonblinking behavior were synthesized through an in situ hot-injection process. The mechanism of the improved photoluminescence (PL) properties is the enhanced pressure effect resulting in increased radiative recombination and interaction between the ligand and perovskite crystals, as confirmed by the PL spectra and finite element calculations. Meanwhile, the NCs show high stability under ambient conditions (with a PLQY of 92.5% after 166 days) and against 365 nm UV light (maintaining 61.74% of the initial PL intensity after continuous radiation for 1000 min). This strategy also works well in the blue and red perovskite/LLDPE NCs and red InP/ZnSeS/ZnS/LLDPE NCs. Finally, white-emitting Mini-LEDs were fabricated by combining the green CsPbBr3/LLDPE and red CsPbBr1.2I1.8/LLDPE core/shell NCs with blue Mini-LED chips. The white-emitting Mini-LEDs exhibit super wide color gamut (∼129% of the National Television Standards Committee or 97% of the Rec. 2020 standards).
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Batteries-Basel
·
2023
·Vol. 9
·期 6
·307
·
IF 4
Deng Li,Huinan Pan,Zhonghai Lin,Xiulian Qiu,Xinyu Zhao,Wei Yang,Wenzhi Zheng,Fengming Ren
Compared with monometallic selenides, heterogeneous bimetallic selenides have rich phase boundaries and superior electrical conductivity. ZnSe/CoSe2composites were prepared by introducing Zn metal and using ZIF-8/67 as the precursor through the synergistic effect between Zn and Co after selenification. The electrocatalytic conversion of polysulfide is accelerated by ZnSe through chemical adsorption and the catalytic effect. The conductive CoSe2surface provides a rapid diffusion path for lithium ions, accelerating the conversion of the polysulfide. On the basis of their individual strengths, ZnSe and CoSe2can jointly promote the smooth adsorptive–diffuse–catalytic conversion process of polysulfide and induce the growth of lithium sulfide around its heterogeneous interface, thus enhancing the electrochemical performance of the lithium–sulfur battery cathode materials. The ZnSe/CoSe2–S electrode, at the optimal Zn-to-Co ratio of 1:1, has a 790.06 mAh g−1initial specific capacity at 0.2 C and excellent cycling stability at 1 C. After 300 cycles, the final capacity is 300.85 mAh g−1, and the capacity retention rate reaches 82.71%.
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CARBON
·
2023
·
IF 10.9
Meng Ma,Qi Zheng,Xinci Zhang,Lin Li,Maosheng Cao
Electromagnetic radiation pollution has become a serious threat, which will harm human health and interfere with electronic devices. However, it is still a challenge to develop high-efficiency electromagnetic wave absorbers with wide frequency band and strong absorption, especially for realizing the features of multi-bands absorption. Herein, VSe 2 /CNTs nanocomposites were successfully synthesized with crosslinked CNTs distributed on VSe 2 nanoclusters composed of nanosheets . Importantly, the electromagnetic properties and absorption performance of the VSe 2 /CNTs nanocomposites can be effectively tailored by changing the hybrid ratio of CNTs and VSe 2 nanosheets (VSe 2 -NSs). The increase of CNTs content promotes the formation of a conductive network and leads to the increase of permittivity. The VSe 2 /CNTs nanocomposite with CNTs of 40 mg exhibits the best electromagnetic wave absorption performance, the minimum reflection loss ( RL ) reaches −57.53 dB at 5.52 GHz and is about 6 times more than VSe 2 -NSs. Meanwhile, the VSe 2 /CNTs nanocomposite with CNTs of 30 mg shows dual-bands absorption performance with a minimum RL value of −50.06 dB at 3.84 GHz and the total effective absorption bandwidth of 3.32 GHz. This result proves that VSe 2 /CNTs nanocomposites can be promising candidates as high-efficiency electromagnetic wave absorption material and provides a feasible idea for designing a high-performance electromagnetic wave absorber.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Guorong Wang,Guiquan Liu,Zhiliang Jin
Vanadium-based hydrotalcite materials have attracted much attention in supercapacitor electrodes due to their polyvalent properties. Nevertheless, the weak electrical conductivity of hydrotalcite limits its further development. In order to overcome this problem, nanoflowers P-NiV-LDHs-8 and Se-NiV-LDHs-1 were obtained by ingenious modification on the surface of nanoflower microlamellae of NiV-LDHs. Compared with Se-NiV-LDHs-x (x = 0.5, 2), P-NiV-LDHs-x (x = 4, 12), NiV-LDHs, Ni2P, and NiSe2, nanoflowers P-NiV-LDHs-8 and Se-NiV-LDHs-1 have better mass-specific capacity and corresponding rate performances. The self-assembled P-NiV-LDHs-8//AC and Se-NiV-LDHs-1//AC (AC = activated carbon) soft package devices have relatively superior energy density and power density. Moreover, the specific capacitance retention also maintains a relatively impressive level. It is proven that the interfacial modification has a positive effect on the energy storage performance of NiV-LDHs from the perspectives of phosphating and selenizing.
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Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 13
·3116-3121
·
IF 5.6
Xinyue Wang,Yibin Wang,Xinzhi Ma,Lingling Xu,Sirui Liu,Wei Wang,Huiqing Lu,Lili Wu
Cobalt diselenide (CoSe2) is considered a promising catalyst for hydrogen evolution reaction (HER); however, the limited active number, agglomeration, and quick deactivation by acid etching hinder its broad adoption. Herein, we report carbon layer-covered CoSe2 nanowire arrays grown on carbon cloth (C@CoSe2/CC). The structure of the nanowire array demonstrates synergistic effects in promoting the infiltration of electrolytes, accelerating the diffusion of H2 bubbles, and preventing CoSe2 from being etched by the electrolyte. Consequently, the overpotential and Tafel slope (193 mV, 54.3 mV dec−1) obtained sustained 24 h with a negligible overpotential deterioration. This study provides insights into optimizing the intrinsic activity of active sites.
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ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 8
·1391-1403
·
IF 1.6
Zhu Leijing,Ma Jing,Jin Danli,Zhang Yongjian,Wu Siyu,Xu Ajing,Gu Yingying,An Yarui,Miao Yuqing
The abnormal concentrations of human immunoglobulin G (hIgG) refers to many kinds of diseases. Analytical methods with the characteristics of rapid response, easy operation and high sensitivity should be designed to accurately determinate the hIgG levels in human serum. In this work, a label-free electrochemical immunosensor based on WSe 2 /rGO was developed to sensitively detect human immunoglobulin G. First, the flower-like transition metal dichalcogenides (TMDCs) Tungsten Diselenide (WSe 2 ) with large effective specific surface area and porous structure was synthesized by hydrothermal synthesis. As a bio-matrix, the flower-like WSe 2 efficiently increased the active sites for loading antibodies. Meanwhile, reduced graphene oxide (rGO) obtained by tannic acid reduction was used to improve the current response of the sensing interface. WSe 2 was combined with rGO and the electrochemical active surface area (ECSA) of the sensing interface was enlarged to 2.1 times that of GCE. Finally, the combination of flower-like WSe 2 and rGO broadened the detection range and reduced the detection limit of the sensing platform. The immunosensor exhibited a high sensitivity with a wide linear range of 0.01–1000 ng/mL and low detection limit of 4.72 pg/mL. The real sample analysis of hIgG were conducted under optimal conditions, and the spiked recovery rates were between 95.5 and 104.1%. Moreover, satisfactory results were obtained by testing the stability, specificity and reproducibility of the immunosensor. Therefore, it can be concluded that the as-proposed immunosensor has the application potential of clinical analyze of hIgG in human serum. Graphical abstract
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SOLAR ENERGY
·
2023
·
IF 6.7
Yonggang Zhao,Congyan Xu,Na Yu,Zhineng Zhou,Yufei Chen,Xinghuan Hu,Ying Zhang,Shurong Wang
A mixed dimethyl sulfoxide (DMSO) and 2-methoxy ethanol (MOE) solvent system was developed to prepare high-quality kesterite Cu 2 ZnSn(S, Se) 4 (CZTSSe) film. The precursor films made pure DMSO system show a tube-like microstructure morphology, which can be changed by adding MOE to the solution. The increase of MOE in the precursor solution is a key in the crystalline characteristic of the absorber and connecting performance with thin film solar cells. As V MOE = V DMSO , the CZTSSe layer can achieve good contact with the back electrode and obtain large grains across layers. The addition of MOE solvent effectively improves the fill factor (FF). Specifically, both the fill factor and efficiency are increased from 49.67% and 6.43% to 64.83% and 10.99%, respectively, with the addition of 2 mL of MOE into precursor solution prepared by DMSO.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 3
·1372-1380
·
IF 3.3
Peng Sun,Menglu Zhang,Yue Liu,Jiahua Zhao,Jiawei Yang,Yufeng Wang,Yongfei Wang,Zhiqiang Zhang
Lithium-ion batteries have been regarded as a promising power source for various electronic devices. Compared to the traditional graphite anode material, MoSe2 possesses a higher theoretical capacity. However, MoSe2 anode materials are limited by low electronic conductivity and large volume changes during cycling. This study reports 1T–2H MoSe2/N-doped rGO nanocomposites, fabricated through a hydrothermal method. The 1T–2H MoSe2/N-doped rGO electrode delivers a high reversible capacity of 483.6 mA h g−1 after 1000 cycles at 1000 mA g−1. It also possesses a high reversible capacity of 474.9 mA h g−1 even at a current density of 2000 mA g−1, thus, making it an important potential lithium-ion battery anode.
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MATERIALS LETTERS
·
2023
·
IF 3
Caichao Wang,Yan Zhu,Kang Xu,Shuhong Sun,Mingrong Dong,Jinkun Liu,Yongmao Hu
Semiconductors Ag 8 SnS 6 (ATS) nanoparticles were synthesized by a simple one-pot method. Meanwhile, Se was added to the ATS process to form semiconductors Ag 8 SnS 6-x Se x (ATSSe) (x = 0.0, 0.2, 0.4, 0.6, 0.8) nanoparticles. The prepared ATS nanoparticles were mainly triangle in shape with grain sizes ranging from 15 ∼ 60 nm, and ATSSe nanoparticles were formed after the addition of Se during the synthesis process. Phase transformation of the synthesized nanoparticles rhombohedral crystalline ATS to cubic ATSe was observed for Se substitution ratios x in the range of 0.2 ∼ 0.8. The band gap of ATSSe nanoparticles was in the range of 1.16 ∼ 0.85 eV. This finding suggests that Se substitution is an effective method to regulate the band gap and structure of ATS.
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BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Bo Liu,Yonghao Ge,Yahui Lu,Yibo Huang,Xiaoru Zhang,Xunyi Yuan
This work develops a novel photoelectrochemical sensor for the detection of carcinoembryonic antigen (CEA) based on the composite of UCNPs with semiconductors and conformational changes in the DNA structure . Firstly, SnS 2 , ZnIn 2 S 4 and UCNPs were assembled on the surface of the ITO electrode. Then Au NPs were dropped, which could facilitate the coupling of CdSe NPs modified DNA1 via Au–S bond, giving an ITO/SnS 2 /ZnIn 2 S 4 /UCNPs/CdSe heterojunction structure. When irradiated with 980 nm near-infrared (NIR) light, the UV–visible light emitted by the UCNPs could excite the nanocomposite , producing an enhanced photoelectric reaction. Subsequently, CEA aptamer and DNA2-modified SiO 2 were added to form a Y-shaped DNA structure. At this time, the photocurrent was significantly reduced by the combination of the light-blocking effect of SiO 2 and the departure of CdSe NPs from the electrode surface . When the target CEA was added, the recognition between CEA and the aptamer led to the collapse of the Y-shaped DNA structure, the restoration of hairpin DNA and the proximity of CdSe to the electrode. Accordingly, the photocurrent signals enhanced again. Under optimal experimental conditions, the detection limit as low as 0.3 pg mL −1 was obtained with good selectivity , achieving a sensitive “on-off-on” photoelectrochemical sensor for CEA detection.
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