Journal of Sulfur Chemistry
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2024
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IF 2.1
Yuyang Wang,Tao Ge,Xinju Zhan,Song Liu,Yulu Wei,Yueyue Qiao
The incomplete reduction of graphene oxide (GO) yields reduced graphene oxide (rGO), characterized by a zero band gap and intrinsic layer stacking, thus constraining its practical utility across diverse domains. Fortunately, this challenge can be effectively addressed by employing a suitable substrate for the fabrication of MoS2/rGO heterostructures. Nanocomposites of MoS2/reduced graphene oxide (MoS2/rGO-700W and MoS2/rGO-560W) were synthesized using MoS2 and GO solutions as starting materials through microwave-assisted synthesis with microwave power treatments of 700W and 560W, respectively. Structural characterization results reveal that the particle size of MoS2 within the composites is notably smaller compared to that of pure MoS2. The MoS2/rGO-700W composite demonstrates a more homogeneous dispersion of MoS2 and features a well-developed hierarchical porous structure with increased pore volume and specific surface area. The MoS2/rGO-700W composite demonstrates elevated ID/IG ratio, C/O ratio and C = C peak area, suggesting that increased microwave power enhances the removal of oxygen-containing groups from rGO. This process significantly restores the extended conjugated structure of graphene, thereby offering enhanced conductivity at the MoS2 interface. Furthermore, the proposed strategy holds considerable theoretical value and provides significant insights for the development process of novel MoS2-based composite electrode materials.
研究领域:
材料科学
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能源存储
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Shilong Lin,Jingyang Lei,Xuenuan Li,Yuan Luo,Jiayi He,Weile Ding,Bin Guo,Aimiao Qin,Xianming Liu,Kaiyou Zhang,Li Jiang,Shiqi Wang
Silicon dioxide (SiO2) has a much lower volume expansion rate than monolithic silicon when used as an anode in lithium-ion batteries, and due to its high theoretical capacity and more balanced electrochemical properties, it has attracted the attention of a wide range of researchers. However, the inherent low electrical conductivity of SiO2 and the expansion problem during cycling are still the key issues limiting its practical application. This work utilizes a low-cost, easy step-by-step synthesis method to prepare SiO2/C hollow structure nanospheres (DCSF) by using tetrapropoxysilane as the silicon source and phenolic resin as the carbon source. The structure and size of DCSF were also regulated by controlling the time difference between the polymerization and hydrolysis reactions in the room temperature. The disordered carbon encapsulated in the outer layer and the special hollow mesoporous structure of DCSF with an appropriate C:SiO2 ratio not only provides more migration channels and accelerated migration kinetics for lithium ions and electrons but also maintains the stability of the electrode structure by alleviating the volume expansion of SiO2 during the cycling process. Due to the synergistic effect of structure and chemical composition, the DCSF exhibits excellent electrochemical properties including excellent multiplicative rate, high efficiency (at 1245.07 mA h g–1 at 0.1 A g–1 and 515.67 mA h g–1 at 5 A g–1) and long-term cycle life (456.61 mA h g–1 after 600 cycles at 10 A g–1). This work has the potential to provide an efficient solution for the design of SiO2/C for high-energy lithium battery energy storage.
研究领域:
材料科学
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储能技术
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电化学
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纳米材料
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锂离子电池
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DOI
高影响因子
ACS Applied Energy Materials
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2021
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IF 6.024
Jun-Qi Hu,Yue-Zhu Li,Song-Yi Liao,Xing-Wen Huang,Yi-Zhao Chen,Xiao-Kang Peng,Yi-Bin Yang,Yong-Gang Min
Currently, the thermal runaway of lithium-ion batteries (LIBs) has become one of its most concerned safety hazards. Therefore, battery cells with high safety and energy density have become the important goal for the development of LIBs. In this work, the ultralight and high thermal conductivity of the Cu@graphene-like thermal film (shortened as Cu@GTF) composite current collector with a sandwich structure was derived from polyimide and prepared by the vacuum evaporation method. Compared with the commercial copper foil, the Cu@GTF showed a smaller areal density of <7.0 mg/cm2 (vs 17.50 mg/cm2 of commercial Cu foil) and a higher thermal conductivity of >550 mm2/s (vs 164 mm2/s of Cu foil). Considering its lighter mass, higher thermal conductivity, and reasonable electrical conductivity, the Cu@GTF as a current collector may become a favorable competitor of the commercial Cu foil to meet people’s needs for high safety, energy, and performance of LIBs.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
Nano Research
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2021
·Vol. 15
·期 4
·3178-3186
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IF 8.897
Liu Yanchen,Chen Yafen,Wang Jing,Wang Wei,Ding Zhiyu,Li Leyuan,Zhang Yang,Deng Yida,Wu Junwei,Chen Yanan
Despite the high energy density of lithium-rich (Li-rich) cathodes, their implementation is hampered by the unsatisfied rate capacity and poor cycling performance accompanied with substantial voltage decay. To address these issues, the hierarchical yolk-shell structured Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathodes (YK-LMNCO) was proposed and synthesized through a facile glycerol assisted solvothermal approach and the following lithiation process. Benefitting from the shortened lithium diffusion lengths and the enhanced tolerance to the large volume variation upon lithium ions intercalation/de-intercalation, the unique structure reciprocates an initial coulombic efficiency of 85.8%, an outstanding capacity retention rate of 89.1% after cycling at 2.0 C for 200 cycles with a minor voltage drop, and a capacity retention rate of 93.8% after cycling at 10.0 C for 500 cycles, 85.2% for 1,000 cycles. When assembled with graphite as anode, the YK-LMNCO//graphite full cell shows a remarkable capacity retention rate of 87.2% after cycling at 5.0 C for 50 cycles. Our facile strategy for constructing the yolk-shell structured Li-rich cathodes with high capacity and voltage stability sheds light on synthesizing other lithium storage materials.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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电池技术
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固态化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2023
·Vol. 42
·期 4
·521-531
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IF 4.3
Liu Cun-Sheng,Hu Jun-Qi,Mao Ting-Ting,Liao Song-Yi,Feng Ru-Ming,Liu Yi-Dong,Min Yong-Gang
Metallic copper is widely used as current collector (CC) for graphite anode of lithium-ion batteries (LIBs) due to its high electrical conductivity and electrochemical stability. However, the large volume density of commercial copper foil (∼8.9 g·cm −3 ) limits the increase of energy density of battery. Here, copper-coated porous polyimide (Cu@PPI) was prepared by vacuum evaporation as collector for the graphite anode. The sandwich structure connects the copper metal on both sides of the collector with excellent electrical conductivity. Compared to commercial Cu foil, Cu@PPI has lighter mass (≤3.9 mg for disc of 12 mm diameter versus 9.9 mg of ∼10 µm Cu foil) and lower volume density (≤3.3 g·cm −3 ). In addition, the porous structure allows of better adhesion of reactive substances and electrochemical properties than pure Cu foils. It is estimated that the energy density of Cu@PPI should be much higher than that of Cu foil. This strategy should be applicable for other current collectors.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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2025
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IF 3.1
Xinyan Yang,Xin Wang,Peng Zhu,Fei Han,Hongmei Ren,Zefeng Hua,Zhengbo Qin,Zhong-Fa Sun,Xianfeng Zheng
Reducing air interference is one of the most important steps in achieving direct determination of nitrogen element in water by laser-induced breakdown spectroscopy (LIBS). In this work, plasma amplification LIBS assisted with spatially resolved spectroscopy was used to reduce air interference in LIBS. The longitudinal spatially resolved spectrum of N I 746.831 nm at different breakdown position was obtained and optimized by imaging the plasma on the spectrometer entrance slit. By selecting the pixel range of plasma from 1-256 to 25-80, the background equivalent concentration (BEC) was reduced from 34.29 ppm to 9.58 ppm. Furthermore, the limit of detection (LoD), R2, the average relative error (REAV), and the root mean square error of cross validation (RMSECV) were improved from 2.01 to 0.53 ppm, 0.7779 to 0.9554, 24.76% to 15.22%, and 11.03 to 3.63 ppm, respectively. The results shown that the weak air interference and higher quantitative analysis performance of plasma amplification LIBS could be obtained by spatially resolved spectroscopy.
研究领域:
分析化学
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光谱学
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产品关联
DOI
高影响因子
PLANT AND SOIL
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2026
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IF 4.8
Cai Qiyang,Xu Fanghao,Zhang Shuaishuai,Cao Fengjing,Wang Ke,Dong Daming,Zhao Xiande
Aims Plants serve as bioindicators of environmental heavy metal pollution. Rapid, non-destructive techniques for plant elemental analysis are essential for understanding pollutant uptake and nutrient interactions. This study aimed to develop a novel approach integrating Laser-Induced Breakdown Spectroscopy (LIBS) with guttation fluid for non-destructive monitoring of elemental dynamics in Alocasia under Cr (III) stress. Methods Guttation fluid (easy to collect and with a large volume) was collected non-destructively from hydroponically cultivated Alocasia plants subjected to Cr (III) stress. LIBS analysis was performed on fluid samples using a liquid-to-solid enrichment strategy to enhance trace detection. Signal validation was conducted via comparison with Inductively Coupled Plasma Mass Spectrometry (ICP-MS) measurements. Results Guttation fluid elemental composition strongly correlated with plant tissues. Under Cr(III) stress, Cr signal intensity increased with stress concentration, while Mg and Ca signals decreased by approximately 30–40%. The accumulation of Cr in guttation fluid continued to rise to a peak and then decreased (likely associated with root damage). LIBS results showed significant correlation with those obtained by ICP-MS (R 2 = 0.995 for Cr(Ⅰ)). The method achieved a detection limit of 20.3 ppb for Cr with excellent linearity (R 2 = 0.963). Conclusion This LIBS-guttation fluid approach provides a reliable, non-destructive means to monitor plant responses to heavy metal stress, offering potential for environmental biomonitoring and crop safety assessment.
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DOI
高影响因子
Small
·
2022
·Vol. 19
·期 1
·2204867
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IF 15.153
Ning Zhang,Kun Liu,Haibai Zhang,Xiaofei Wang,Yuhao Zhou,Wenxiu He,Jinlong Cui,Juncai Sun
To break the stereotype that silica can only be reduced via a magnesiothermic and aluminothermic method at low-temperature condition, the novel strategy for converting silica to SiO x using disproportionation effect of SnO generated via low-temperature pyrolysis coreduction reaction between SnO 2 and rice husk is proposed, without any raw materials waste and environmental hazards. After the low-temperature pyrolysis reaction, SnO y @C/SiO x composites with unique structure (Sn/SnO 2 dispersed on the surface and within pores of biochar as well as SiO x residing in the interior) are obtained due to the exclusive biological properties of rice husk. Such unique structural features render SnO y @C/SiO x composites with an excellent talent for repairing the damaged structure and the highly electrochemical storage ability (530.8 mAh g −1 at 10 A g −1 after 7500 cycles). Furthermore, assembled LiFePO 4 ||SnO y -50@C/SiO x full cell displays a high discharge capacity of 463.7 mAh g −1 after 100 cycles at 0.2 A g −1 . The Li + transport mechanism is revealed by density functional theory calculations. This work provides references and ideas for green, efficient, and high-value to reduce SiO 2 , especially in biomass, which also avoids the waste of raw materials in the production process, and becomes an essential step in sustainable development.
研究领域:
材料科学
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能源存储
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绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Shuting Lin,Xingwei Yi,Lei Yan,Shanshan Liang,Fusong Yuan
Modern dental procedures primarily rely on visual inspection and tactile feedback to distinguish enamel from dentin, which may result in irreversible loss of healthy tissue due to excessive preparation. Laser-induced breakdown spectroscopy (LIBS) offers potential for intraoperative tissue identification, but its single-pulse signals are affected by laser energy fluctuations and dental-tissue matrix effects. This study proposes a robust LIBS-based classification method integrating interactive spectral reconstruction with a hydroxyapatite (HAP) spectral-distance prior. A multi-scale sliding-window reconstruction strategy was developed to organize same-site spectral pair data acquired from interval breakdowns into multi-channel matrices, thereby capturing both their shared spectral characteristics and fluctuation differences. Using the mean spectrum of standard HAP as a static reference, Euclidean-distance and Voigt-fitting-based distance features were extracted to quantify physicochemical deviations from HAP and reduce interference caused by matrix effects. A Dual-Dimension Attention Spectral Fusion Network (DDA-Net) was then constructed for enamel-dentin classification. DDA-Net outperformed other baseline models under mixed-data splitting (Mode 1), cross-time splitting (Mode 2), and cross-sample validation. With the Euclidean-distance strategy, it achieved an overall accuracy of 94.88% in Mode 1. In the more challenging Mode 2, its accuracy exceeded those of conventional baselines by 7 . 7 5 % − 1 7 . 8 5 % . In leave-one-tooth-out cross-validation, DDA-Net achieved 90.33% accuracy on unseen teeth and exceeded the three backbone-replacement variants by 1 . 9 1 % − 7 . 3 3 % under identical input conditions. SHAP analysis indicated that the model formed a nonlinear decision mechanism based on coordinated multi-band spectral information. These results demonstrate the potential of the proposed method for accurate and robust intraoperative discrimination between enamel and dentin.
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DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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2024
·
IF 3.1
Lin Yuan,Qiuyun Wang,Hailong Yu,Peng Lang,Han Li,Xun Gao,Jingquan Lin
The highly sensitive detection of heavy metal elements in aqueous solution has been achieved by the combination of circular grooves and nanoparticle-enhanced laser-induced breakdown spectroscopy. The effects of Ag nanoparticles (Ag NPs) and circular grooves on the spectral emission of Cu, Pb and Cr have been investigated. The results show that both Ag NPs and circular grooves can enhance the spectral emission of heavy metal elements, and the circular grooves can improve the spectral reproducibility. The prepared micro/nanostructures can suppress the coffee ring effect and improve the absorption efficiency of light. The average relative standard deviation of the spectral emission can be diminished. By establishing calibration curves for Cu, Pb, and Cr elements, the limits of detection (LODs) for Cu, Pb and Cr elements have been obtained. The results show that by employing Ag NPs and circular grooves the lowest LOD of 0.10 μg mL−1 can be achieved. This improved spectral performance (spectral intensity, stability and detection sensitivity) originates mainly from the collective oscillation of free electrons of Ag NPs excited by the incident laser pulse, which confines the electromagnetic energy with a strongly enhanced electric field. The enhancement in electric field intensity of Ag NPs is calculated and the seed electron is proved to be predominantly excited through a multiphoton photoemission process under the experimental conditions. The results provide an efficient pathway for improving the detection sensitivity of heavy metals in aqueous solution.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hangchao Wang,Xiaomi Shi,Keqiang Ding,Chenxue Li,Yanzhi Sun,Hui Wang,Hongmin Dou,Junqing Pan
A novel finding, that spine-shaped elementary Sn can be prepared by using a constant voltage electrolysis method, was reported for the first time in this communication. The well-defined spine morphology of the prepared sample was evidenced by the SEM image, and the formation of elementary Sn particles with relatively higher crystallinity was documented by the obtained XRD pattern. More importantly, the galvanostatic charge-discharge measurement results indicated that the initial discharge capacity of the prepared sample was as high as 439 mAh g -1 at 100 mA g -1 , and after 20 cycles, the discharge capacity could be maintained at about 101 mAh g -1 under the current density of 100 mA g -1 . Showing the preparation of spine-shaped elementary Sn was the main contribution of this work, which was not only beneficial to the development of anode material of LIBs but also very favorable to the improvement of microelectronic devices.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
✓ 已验证
DOI
高影响因子
Metals
·
2024
·Vol. 14
·期 5
·595
·
IF 2.6
Huabin Kong,Yihan Wen,Siying Chen,Xiyao Chen,Runzhi Chen,Jiamou Yan,Nianjie Mao
Molybdenum diselenide (MoSe2) is a promising anode for alkali-ion storage due to its intrinsic advantages. However, MoSe2still encounters the issues of structural instability and poor rate performance caused by drastic volume change and sluggish reaction kinetics. Reasonable design of electrode structure is crucial for achieving superior electrochemical performance. Herein, a novel hierarchical structure coupled with 1D/1D subunits is elaborately designed and constructed, in which the MoSe2/CoSe2heterostructure is the “trunk” and the N-doped carbon nanotubes are the “branches” (MoSe2/CoSe2/NCNTs). Benefiting from the properties endowed by unique configurations, MoSe2/CoSe2/NCNTs electrodes manifest faster reaction kinetics and better structure durability. Evaluated as an anode for LIBs and SIBs, MoSe2/CoSe2/NCNTs deliver high reversible capacity, superior rate capability (452 at 10 A g−1in LIBs and 296 at 10 A g−1in SIBs), and prominent cycle life (553 after 2000 cycles at 5 A g−1in LIBs and 310 after 2000 cycles at 5 A g−1in SIBs). Such design conception can also provide guidance for the development of other high-performance electrodes.
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
危险品化学品经营许可证（带存储）