JOURNAL OF SOLID STATE CHEMISTRY
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2013
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IF 2.04
Yong Xiang,Xiaokun Zhang,Shu Zhang
Sb-doping has been demonstrated to be a new approach to promote Cu(In,Ga)Se 2 (CIGS) thin film formation . To study the mechanism of Sb-promoted CIGS formation, we investigated the influence of Sb on the evolution of the critical intermediate Cu–Se phases, and found that Cu 3 SbSe 3 species was formed. Phase change of the as-prepared Cu–Se compounds at elevated temperature was determined using the differential scanning calorimetry analysis. For samples containing Sb, the melting decomposition occurred at 507.1 °C, along with aggregation of nanocrystals into a bulk, while the morphology of the sample without Sb barely changed after heating. This result suggests that the mobile Cu 3 SbSe 3 is likely the key intermediate responsible for Sb-promoted CIGS formation. Furthermore, we extended the scope of Sb-doping approach to solvothermal synthesis and CIGS nanocrystals were synthesized with significantly promoted kinetics in the presence of Sb. Based on these results, we propose the mechanism of Sb promoted CIGS formation.
研究领域:
材料科学
·
太阳能电池
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2012
·
IF 2.237
Xiao Chen,Miao Li,Jingchao Guan,Xinkui Wang,Christopher T. Williams,Changhai Liang
Nickel–silicon intermetallics have been prepared by a direct silicification method using SiH4 as the silicon source. The prepared nickel–silicon intermetallics were characterized by X-ray diffraction, transmission electron microscopy, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and CO chemisorption measurements. The catalytic hydrogenation of cinnamaldehyde and phenylacetylene over the nickel–silicon intermetallics was investigated. Nickel–silicon intermetallics presented much higher selectivity to the intermediate product (hydrocinnamaldehyde) than monometallic nickel catalyst, which may be attributed to the repulsive force between the electronegative silicon atoms in the nickel–silicon intermetallics and oxygen atoms in the C═O bond of cinnamaldehyde. In addition, nickel–silicon intermetallics showed excellent selectivity for the hydrogenation of phenylacetylene to styrene (ca. 93%) due to the strong modification of the electronic structure derived from the interaction of nickel and silicon.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Juan Wang,Siwen Jin,Zhengqiu He,Debin Kong,Han Hu,Xiang Feng,De Chen
The low effective capacity, inferior initial Coulombic efficiency, and unstable solid electrolyte interface (SEI) of silicon oxycarbide (SiOC) materials in lithium-ion batteries (LIBs) pose significant challenges for the widespread application. Herein, to circumvent these issues, a micron-sized SiOC-based anode with 3D structure is constructed by Si and Cu co-doping using solvent-free ball milling for high-performance LIBs. The Cu 3 Si alloy is formed in situ as an intermediate that is anchored to the surface of Si within the SiOC matrix. The unique 3D SiOC-based anode with Cu 3 Si interphase provides fast electron conductivity and high mechanical strength, while facilitating the formation of a robust and LiF-rich SEI. Specifically, the SiOC-based anode delivers excellent cyclic stability and rate capability (750.0 mAh g −1 for 1000 cycles at 1 A g −1 ). Notably, the full cells equipped with an NCM811 cathode maintain this cyclic stability, achieving a 93.0% capacity retention after 150 cycles. This work provides insights into the rational fabrication of a 3D micron-sized SiOC-based anode with an in situ generated Cu 3 Si interphase for advanced LIBs and beyond.
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
Journal of the American Chemical Society
·
2019
·
IF 14.695
Yalan Zhang,Peijun Wang,Ming-Chun Tang,Dounya Barrit,Weijun Ke,Junxue Liu,Tao Luo,Yucheng Liu,Tianqi Niu,Detlef-M Smilgies,Zhou Yang,Zhike Liu,Shengye Jin,Mercouri G. Kanatzidis,Aram Amassian,Shengzhong Frank Liu,Kui Zhao
The two-dimensional (2D) perovskites stabilized by alternating cations in the interlayer space (ACI) define a new type of structure with different physical properties than the more common Ruddlesden–Popper counterparts. However, there is a lack of understanding of material crystallization in films and its influence on the morphological/optoelectronic properties and the final photovoltaic devices. Herein, we undertake in situ studies of the solidification process for ACI 2D perovskite (GA)(MA)nPbnI3n+1 (⟨n⟩ = 3) from ink to solid-state semiconductor, using solvent mixture of DMSO:DMF (1:10 v/v) as the solvent and link this behavior to solar cell devices. The in situ grazing-incidence X-ray scattering (GIWAXS) analysis reveals a complex journey through disordered sol–gel precursors, intermediate phases, and ultimately to ACI perovskites. The intermediate phases, including a crystalline solvate compound and the 2D GA2PbI4 perovskite, provide a scaffold for the growth of the ACI perovskites during thermal annealing. We identify 2D GA2PbI4 to be the key intermediate phase, which is strongly influenced by the deposition technique and determines the formation of the 1D GAPbI3 byproducts and the distribution of various n phases of ACI perovskites in the final films. We also confirm the presence of internal charge transfer between different n phases through transient absorption spectroscopy. The high quality ACI perovskite films deposited from solvent mixture of DMSO:DMF (1:10 v/v) deliver a record power conversion efficiency of 14.7% in planar solar cells and significantly enhanced long-term stability of devices in contrast to the 3D MAPbI3 counterpart.
研究领域:
材料科学
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光伏技术
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物理化学
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Yisen Huang,Haoruo Zhang,Chuxiang Zhou,Jingfeng Tian,Hao Zhang,Liwei Yan,Huawei Zou,Yang Chen,Mei Liang
This study examines the influence of carbonization features, char structures and microstructures of graphitic carbon (GC) on the ablation behavior of graphite (G) and pre-oxidized mesophase pitch (OMP) modified boron phenolic (BPR) composites. Results showed that the introduced G and OMP can both effectively hinder the growth of defects, while improve the graphitization degree of residue char during ablation. However, some areas of the ablated surface of GBPRs would randomly splashed at an early stage because of the thermal dimensional stability mismatch between G and matrix. But as the OMP underwent a carbonization process, in company with the resin matrix, the ablated surface of OMPBPRs keep complete and smooth. Therefore, we found that the formation of mosaic combination and the compatibility of co-carbonization process are the keys for enhanced ablation performance. These findings would provide some inspirations for the development of more advanced polymer-matrix ablative composites in the future.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Shuang Mu,Qin Ma,Yu Zhang,Xu Shen,Chunjing Liao,Xiangyu Zhang,Yusheng Ding,Shaoming Dong,Jinshan Yang
In this work, the Yb 2 Si 2 O 7 interphase was prepared on SiC fibers using the sol–gel method. The influence of sol concentration on the morphology of the interphase was discussed. After heat treatment in argon at 1200°C for 1 h, the Yb 2 Si 2 O 7 was grown in situ on the fiber surface, forming an interphase layer. Then, SiC f /Yb 2 Si 2 O 7 /SiC minicomposites were prepared by chemical vapor infiltration (CVI). The Yb 2 Si 2 O 7 interphase exhibited no changes throughout the high-temperature preparation process and maintained stability and compatibility with the fiber and matrix. The tensile strength of SiC f /Yb 2 Si 2 O 7 /SiC minicomposites with Yb 2 Si 2 O 7 interphase was significantly higher than SiC f /SiC minicomposites without interphase. The crack deflection, interfacial debonding, and fiber pullout were observed in the tensile fracture of the SiC f /Yb 2 Si 2 O 7 /SiC minicomposites.
研究领域:
材料科学
·
机械工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yujing Wang,Wenhui Zhao,Kaibo Zheng,Carlito S. Ponseca Jr,Yanxia Cui,Guohui Li
Ultrasmooth solution-processable quasi-2D perovskite thin films are of critical importance for many optoelectronic devices. In this work, we fabricated an ultrasmooth intermediate-phase free quasi-2D (PEA)2(FA)n-1PbnBr3n+1 perovskite film by using antisolvents with different polarities and boiling points to engineer the crystallization process. XRDs of perovskite powder showed that residual PbBr2 intermediate-phase could be eliminated using antisolvent DIE with low polarity and appropriate boiling point. The intermediate-phase free quasi-2D perovskite film has the narrowest FWHM, which indicates it exhibits better crystallinity. SEM and AFM images showed that intermediate-phase free film exhibits fewer pinholes and a more compact surface morphology. The intermediate-phase free quasi-2D perovskite displayed the smoothest surface with an RMS roughness of 1.82 nm, while that of the film with the residual intermediate-phase fabricated with antisolvent ethyl acetate (EA) is 4.83 nm. Time-resolved photoluminescence (TRPL) results show that the intermediate-phase free film has the longest charge carrier lifetime up to 1.24 ns, indicating it has the lowest trap density. Due to these improved qualities, the amplified spontaneous emission (ASE) threshold of the quasi-2D perovskite was reduced from 20.75 μJ cm-2 to 14.69 μJ cm-2. This work provides a method to fabricate ultrasmooth intermediate-phase free quasi-2D perovskite for high-performance optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jenaidullah Batur,Zunbin Duan,Ruipeng Jin,Rui Li,Yabo Xie,Xue-Feng Yu,Jian-Rong Li
The newly reported crystalline phosphorus nanosheets (cryst-P NSs) exhibit promising features for industrial applications, including outstanding air–water stability and facile large-scale production. However, their complex crystallization impedes a priori tailoring. Herein, the temporal evolution of cryst-P NSs was investigated with the optimized synthesis parameters. The occurrence of self-assembly and solid-state rearrangement unveiled the existence of an intermediate phase as the bulk crystalline precursor and the predominance of nonclassical crystallization pathway(s). With the upgraded synthesis protocol simultaneously strengthening the merits of cryst-P NSs, their catalytic performances were evaluated in various electro- and/or photocatalytic reactions spanning hydrogen and oxygen evolution, full water splitting, CO2 reduction, and organic pollutant decomposition. Superior catalytic activities and orders of magnitude longer lifetimes were consistently discerned compared with the widely employed black phosphorus nanosheets with similar size and thickness. The exciting discoveries in both fundamental crystallization and catalytic applications drastically thrust the comprehension of elemental phosphorus, shedding light on the encouraging capabilities of solvothermal synthesis strategies in the design and systematic tailoring of phosphorus materials.
研究领域:
材料科学
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化学工程
·
催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2025
·
IF 11.6
Meng-meng Xu,Qi-guang Huang,Tian-li Hui,Tao Zheng,Hai-yan Liu,Rui Zhang,Xiang-hai Meng,Zhi-chang Liu
Mesophase pitch is a crucial compound platform for the production of various advanced carbon materials, with its quality significantly influenced by the composition and structure of precursor materials. Here, we present a novel method for preparing naphthalene oligomers (NOs), which serve as precursors for the preparation of mesophase pitch (MP) via naphthalene polymerization catalyzed by chloroaluminate ionic liquids (Al-ILs). Different from those obtained via AlCl 3 -catalyzed method, the NOs synthesized by Al-ILs possess a narrow molecular weight distribution (MWD, 200–600 Da) and a well-defined molecular composition (di-, tri-, and tetra-polymers of naphthalene). When the prepared NOs were used as precursors, the resulting MP exhibited a shorter polycondensation time (4 h), higher yield (68%), lower ash content (0.005%), more concentrated MWD, and easier carbonization. These improvements are attributed to the tunable structure and acidity of Al-ILs, which facilitate naphthalene polymerization at low reaction temperatures and appropriate acidity, thereby improving its controllability. This work provides a flexible and efficient pathway for the custom production of NOs that potentially enable broader industrial applications of MP.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhichao Shang,Man Zhang,Jingjing Qu,Sanjith Udayakumar,Xintan Bai,Xiaohong Wang,Baojing Zhang,Jianzhong Wang,Farshid Pahlevani,Peizhong Feng
Chemical/electrochemical dealloying was applied to porous CoAl intermetallic (IMC) precursors synthesized via a rapid thermal explosion (TE) method, producing Co 3 O 4 (O V ) self-supported materials with rod-like, nano-flower, and honeycomb-like nanostructures. The investigation thoroughly explored the phase composition, exothermic behavior, precursor morphology, electrochemical characteristics of the dealloyed products, and the mechanism of oxygen vacancies that influence the performance of supercapacitors. The diffusion of intermediate phases governs the exothermic behavior and structural integrity of the CoAl IMC precursors, formatting a precursor with a porous material featuring a 3D microstructure. The effect of dealloying time, temperature and, applied potential on the nanostructure of the sample was examined, ultimately enabling the controlled synthesis of nano-flower Co 3 O 4 (O V ) in the dealloying process. The synthesized self-supported Co 3 O 4 (O V ) materials with a relatively high concentration of oxygen vacancies and a high specific surface area (36.69 m²/g). The materials showed high capacitance (11.25 F/cm 2 at 10 mA/cm 2 ) and exceptional cyclic stability (the decay rate per cycle is 0.013 % at 20 mA/cm 2 after 2000 cycles). DFT simulations demonstrated that the O V creates additional unsaturated coordination sites, enhancing the storage capacity by facilitating ion insertion and extraction, thus significantly boosting the specific capacity.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Fei Zhao,Wei Deng,Daojie Dong,Xufeng Zhou,Zhaoping Liu
Reasonably designed artificial solid-electrolyte interphases (ASEI) are essential for reversible and stable lithium metal batteries . However, poor compatibility between heterogeneous interfaces remains a challenge for the ASEI to sustain the long-term stability of the lithium metal anodes . Herein, an interfacial compatible protective layer with interpenetrating Li–Sn alloy across the PVDF-HFP interphase (ISPI) is fabricated on the lithium to realize seamless integration of the organic/inorganic components in the interphase, and the interface between ASEI and metallic Li simultaneously. Compared to the double-layered and uniform protective layers that both have sharp joint interfaces, ISPI achieves enhanced mechanical stability and ensures homogeneous lithium deposition underneath it even with a high capacity of 5.0 mAh/cm 2 . Utilizing this interface-compatible ISPI-Li anode, the Li│Li symmetric cells perform stably at a super high current density of 20 mA/cm 2 with a capacity of 1 mAh/cm 2 for over 1000 cycles, and the full cells with ISPI-Li anodes exhibit outstanding cycling performance when coupling with LiFePO 4 or LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathodes. This work proposes a significant concept of designing artificial SEI with a seamlessly integrated interface for lithium metal anodes and uncovers the basic mechanism of interfacial compatibility as a key factor in achieving a highly reversible lithium anode for the practical usage of LMBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 3
·1235-1242
·
IF 2.289
Qiao Jia,Zhou Haitao,Liu Zhongsheng,Wen Hejing,Yang Jianhong
Al-ion batteries are proposed as promising energy storage candidates for beyond Li-ion technology due to the higher natural earth of Al metal. Recently, various graphite and graphene cathodes for Al-ion batteries have been studied in this regard, but their costs are not satisfactory. In this study, a novel cathode for Al-ion batteries is prepared by graphitizing inexpensive soft carbon materials (mesocarbon microspheres and petroleum coke) at 2800 °C. The charge and discharge process is showcased here for graphitized petroleum coke, which has a storage capacity of 77.7 mAh g −1 with two high discharge voltage (~ 2.25 and 1.80 V), higher than graphitized mesocarbon microspheres (51 mAh g −1 ). It also has excellent cycle stability and no reduction in specific capacity after 1000 cycles. Affordable cost of the graphitized petroleum coke cathode makes Al-ion battery more promising for large-scale chemical energy storage.
研究领域:
电化学储能
·
材料科学
·
能源化学
·
无机非金属材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）