ACS Applied Energy Materials
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2024
·
IF 5.4
Lei Zhou,Xin Wei,Junxiang Zhang,Xuecui Mei,Yun Li,Chaoyue Zheng,Furong Zhang,An Wen,Bin Wang
Sulfide solid electrolytes (SSEs) have some huge advantages in high room-temperature conductivity, good thermal stability, low interfacial resistance, etc. They are one of the ideal solid electrolytes for developing high energy density and high safety for all-solid-state lithium batteries (ASSLBs). However, the preparation of SSEs requires expensive Li2S as the raw material, whose high cost limits its practical application. Herein, a cost-effective SSE Li7.3P2.9S10.75X0.3 (X = F, Cl, Br, and I) was designed and prepared by using low-cost lithium and sulfur instead of expensive Li2S. Significantly, the cost of SSEs was reduced from $169.72 to $28.13 kg–1 based on replacing the Li2S strategy. Moreover, the prepared Li7.3P2.9S10.75X0.3 (X = F, Cl, Br, and I) solid electrolytes have a high ionic conductivity of 1.86–2.73 mS cm–1 at room temperature and a high voltage window of 5 V. On this basis, we assembled the all-solid-state lithium battery TiS2/Li7.3P2.9S10.75I0.3/Li–In, which presented a high initial discharge capacity of 219 mA h g–1 at room temperature and satisfactory cycle stability with a capacity retention of 86.7% after 100 cycles at 0.50 mA cm–2. This work provides an effective strategy for reducing the cost of SSEs, advancing the practical process of ASSLBs.
研究领域:
材料科学
·
能源技术
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Hai Ou,Xin An,Peng Li,Weikang Dong,Keke Guan,Jiaxin Qin,Yuanting Wu
CsPbX 3 (X = I, Br, Cl) perovskite quantum dots (QDs) have shown great potential in optoelectronic devices due to their wide tunable bandgap, high photoluminescence quantum yield, and narrow emission spectra. Currently, methods for regulating blue light emission through component engineering or dimensional engineering suffer from issues such as halogen phase separation and increased defects, making it difficult to meet the strict requirements of display technology for pure blue light (CIE y < 0.15). Additionally, traditional synthesis processes are complex and have poor compatibility with Micro-LED miniaturization technology, which restricts their industrial application. Therefore, this study proposes an efficient and green spray drying method. By dissolving the perovskite precursors and halide salts in an aqueous solution, CsPb(Cl/Br) 3 QDs can be rapidly (<10 s) synthesized without organic solvents, and continuous tuning from green to blue light is achieved. This method effectively suppresses surface defects and phase separation through Cl element encapsulation, significantly enhancing stability.Moreover, its excellent processability supports spraying and film formation on any substrate, enabling the direct preparation of highly uniform Mini/Micro-LED pixel units. This technology provides a new approach for large-scale, low-cost manufacturing of perovskite QDs and is expected to accelerate the commercialization process of next-generation display technologies.
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LANGMUIR
·
2023
·
IF 3.9
Hongqi Nie,Zikangping Wang,Xue-Xue Zhang,Su-Lan Yang,Zhi Ren,Qi-Long Yan
In this study, a 2D structured triaminoguanidine-glyoxal polymer with a high nitrogen content has been coordinated with metal ions to produce energetic metal complexes (TAGP-Ms) employed as energetic burn rate inhibitors. The metal ions (Ba2+, K+, and Ca2+) are elaborately selected based on their ability of suppressing the burn rate of composite propellants. The CL-20 crystals were intercalated with prepared TAGP-Ms materials via a solvent–antisolvent method for realization of the precise control on burning behaviors of studied propellants. The influence of TAGP-Ms inhibitors on thermal decomposition and combustion characteristics of high-energy composite propellants was evaluated using thermal analysis and a combustion diagnostic method. Results of TGA/DSC-FTIR measurements suggest that the thermal decomposition of CL-20-containing composite propellants was found to be constrained by varied degrees as a result of TAGP-Ms additions, in which the TAGP-K displays a stronger effect on suppressing the thermal decomposition of CL-20 compared with that of other TAGP-Ms. The FTIR spectra indicate that the primary gaseous phase products are composed of N2O, H2O, and CO2 in CL-20 decomposition, as well as by HCl, H2O, NO2, and N2O in the decomposition of AP for all studied composite propellants. The combustion characterizations show that the TAGP-K-containing composite propellant exhibits a significantly reduced rate of heat release but is associated with a higher flame radiation intensity increased by 4.2% compared with that of the reference propellant, which clearly implies that the TAGP-K is capable of suppressing the energy release rate while ensuring the high energetic features of propellants to be well maintained. Moreover, the burn rate pressure exponents are considerably decreased by ∼10% for the TAGP-K-containing propellants in comparison with those of propellants with the typical formulation, which strongly suggests that TGAP-Ms are promising candidates for tuning the combustion behaviors of composite propellants by influencing the decomposition processes of CL-20 and AP collectively.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 14
·5355
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IF 4.6
Keyan Chen,Shiqi Fu,Chenyu Jin,Fan Guo,Yu He,Qi Ren,Xuesheng Wang
Smartphone-assisted fluorescence and colorimetric methods for the on-site detection of Hg2+and Cl−were established based on the oxidase-like activity of the Au–Hg alloy on the surface of Au/Cu/Ti3C2NSs. The Au nanoparticles (NPs) were constructed via in-situ growth on the surface of Cu/Ti3C2NSs and characterized by different characterization techniques. After the addition of Hg2+, the formation of Hg–Au alloys could promote the oxidization of o-phenylenediamine (OPD) to generate a new fluorescence emission peak of 2,3-diaminopenazine (ADP) at 570 nm. Therefore, a turn-on fluorescence method for the detection of Hg2+was established. As the addition of Cl−can influence the fluorescence of ADP, the fluorescence intensity was constantly quenched to achieve the continuous quantitative detection of Cl−. Therefore, a turn-off fluorescence method for the detection of Cl−was established. This method had good linear ranges for the detection of Hg2+and Cl−in 8.0–200.0 nM and 5.0–350.0 µM, with a detection limit of 0.8 nM and 27 nM, respectively. Depending on the color change with the detection of Hg2+and Cl−, a convenient on-site colorimetric method for an analysis of Hg2+and Cl−was achieved by using digital images combined with smartphones (color recognizers). The digital picture sensor could analyze RGB values in concentrations of Hg2+or Cl−via a smartphone app. In summary, the proposed Au/Cu/Ti3C2NSs-based method provided a novel and more comprehensive application for environmental monitoring.Keywords:Au/Cu/Ti3C2NS;Au–Hg alloy;oxidase-like activity;smartphone;colorimetric detection
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Materials Today Physics
·
2022
·
IF 11.021
Siqi Sun,Pei Jia,Qizhang Huang,Min Lu,Po Lu,Feisong Qin,Guang Sun,Yanbo Gao,Xue Bai,Zhennan Wu,Yu Zhang
Despite rapid development of perovskite nanocrystal (PeNC) light-emitting diodes (LEDs), it remains challenging to achieve efficient and stable blue PeLEDs , especially for pure-blue PeLEDs required for displays. Mixed halide CsPb(Br/Cl) 3 NC is a common strategy to achieve pure-blue emission, but suffers from low photoluminescence quantum yield (PLQY) and spectra instability. Here, a facile approach for the synthesis of high-quality pure-blue emitting CsPb(Br/Cl) 3 NCs is reported by introducing an organic sulfonate, phenyl trifluoromethanesulfonate (PTFMS), which works as an efficient surface passivator. As a result, the optimized PeNCs achieve a high PLQY of 85% and enhanced conductivity. Furthermore, the LED based on the optimized PeNCs is developed with pure-blue emission at 469 nm, which yields an external quantum efficiency (EQE) of 1.20% and luminance of 355 cd m −2 . More impressively, the device shows excellent spectra and operation stability under voltage bias , resulting from the suppressed ion migration channels by efficient defect passivation .
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 12
·6710
·
IF 6.208
Binghui Duan,Xianming Lu,Hongchang Mo,Bojun Tan,Bozhou Wang,Ning Liu
Safety concerns remain a bottleneck for the application of 2,4,6,8,10,12-hexanitro- 2,4,6,8,10,12-hexaazaisowurtzitane (CL-20)/1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX) cocrystal. Melamine–formaldehyde (MF) resin was chosen to fabricate CL-20/HMX cocrystal-based core–shell composites (CH@MF composites) via a facile in situ polymerization method. The resulted CH@MF composites were comprehensively characterized, and a compact core–shell structure was confirmed. The effects of the shell content on the properties of the composites were explored as well. As a result, we found that, except for CH@MF–2 with a 1% shell content, the increase in shell content led to a rougher surface morphology and more close-packed structure. The thermal decomposition peak temperature improved by 5.3 °C for the cocrystal enabled in 1.0 wt% MF resin. Regarding the sensitivity, the CH@MF composites exhibited a significantly reduced impact and friction sensitivity with negligible energy loss compared with the raw cocrystal and physical mixtures due to the cushioning and insulation effects of the MF coating. The formation mechanism of the core–shell micro-composites was further clarified. Overall, this work provides a green, facile and industrially potential strategy for the desensitization of energetic cocrystals. The CH@MF composites with high thermal stability and low sensitivity are promising to be applied in propellants and polymer-bonded explosive (PBX) formulations.Keywords:CL-20/HMX cocrystal;in situ polymerization;core–shell structure;desensitization;thermal stability
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Jie Li,Youcai Lu,Shiyu Ma,Zhongjun Li,Qingchao Liu
Li–O 2 battery has attracted wide attention because it can satisfy the need for a new energy storage system with high energy density. However, poor oxygen reduction (ORR)/oxygen evolution (OER) kinetics involving Li 2 O 2 formation/decomposition is a major obstacle to its development. By designing suitable cathode with desired structure and surface electronic states, the formation/morphology of Li 2 O 2 and the reaction kinetics of charge process can be efficiently optimized simultaneously. In this work, a novel sulfur (S) and chlorine (Cl) co-doped porous carbon (CSC) were synthesized by one-step pyrolysis strategy, and the amount of heterogeneous atoms could be flexibly controlled by different calcination temperatures . Experimental combined with theoretical calculations show that the content of C Cl bond plays an important role in the adsorption of intermediate LiO 2 , thus regulating the morphology of Li 2 O 2 and ultimately affecting the release of battery energy. The C S bond mainly acts on the dynamics of the ORR and OER processes, which has an important influence on improving the round-trip efficiency of the battery. Benefiting from the synergistic effect of heteroatoms , the electrochemical performances of the Li–O 2 battery, including round-trip efficiency, discharge capacity and cycling stability are greatly improved.
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CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Wei Li,Xianhua Sheng,Zhaoliang Yu,Qian Tang,Jinghua Geng,Dangzheng Hu,Xiangdong Meng,Yumei Zhang
Co-based compound is a kind of bifunctional electrocatalyst for the half reactions of water splitting. Here we report the catalytic performance of Co-Cl-C composited catalyst prepared by flash Joule heating system in oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). It is found that Co-Cl-C composited film is an efficient electrocatalyst of OER and HER. In addition, the flash Joule heating is a fast, low energy consumption, and environmentally friendly preparation method. It opens up a new idea for the preparation method of composite materials.
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Advanced Optical Materials
·
2021
·Vol. 9
·期 11
·2100012
·
IF 9.926
Yao Tong,Qin Wang,Enrou Mei,Xiaojuan Liang,Wei Gao,Weidong Xiang
All-inorganic perovskite (CsPbX 3 , X = Cl, Br, I) nanocrystals (NCs) with promising optical properties are recognized as a rising star among photoelectric materials, but their inevitable instabilities limit extensive application. Herein, a new one-step strategy for encapsulating CsPbX 3 NCs with porous zeolite via the hot injection method is explored. By altering the mole ratio of PbX 2 , the emission wavelength of CsPbX 3 @zeolite is found to be regularly modulated from blue-emission (CsPbCl 2 Br@zeolite, 436 nm) to red-emission (CsPbBrI 2 @zeolite, 648 nm), thus enabling full spectrum adjustment. Due to the surface passivation of zeolite to CsPbX 3 NCs, CsPbX 3 @zeolite possess an outstanding quantum yield and display excellent thermal/photo/air stability. Subsequently, white light-emitting diodes based on green-CsPbBr 3 @zeolite and red-CsPbBrI 2 @zeolite are constructed and applied to the backlit display, achieving a wide color gamut of 134.2% for NTSC 1953 and 99.8% for Rec. 2020. The CsPbX 3 @zeolite implanted with a polymethyl methacrylate film is used to realize upconversion emission under an 800 nm laser at room temperature. Furthermore, amplified spontaneous radiation based on CsPbBr 3 @zeolite films is achieved. These results convincingly indicate broad application prospects for CsPbX 3 @zeolite prepared via this simple method.
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ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Ying Pan,Bei Wen,Hongna Zhang,Shuzhen Zhang
With the regulation of perfluorooctanesulfonate (PFOS), 6:2 chlorinated polyfluoroalkyl ether sulfonate (6:2 Cl-PFESA) has been used as a potential PFOS alternative in electroplating . In this study, the uptake, translocation and phytotoxicity of PFOS and 6:2 Cl-PFESA in mung bean ( Vigna radiata (Linn.) Wilczek. ) were investigated. The uptake kinetics of PFOS and 6:2 Cl-PFESA fit the Michaelis-Menten equation well, suggesting that the uptake is a carrier-mediated process. The root concentration factor (RCF) of 6:2 Cl-PFESA (34.55 mL g −1 dw) was 1.27 times that of PFOS (27.11 mL g −1 dw), and the translocation factor (TF) of 6:2 Cl-PFESA (0.177) was 1.07 times that of PFOS (0.165). Exposure to 6:2 Cl-PFESA and PFOS both resulted in the inhibition of mung bean seedling development. Treatment with 6:2 Cl-PFESA and PFOS led to the concentration-dependent elevation of malondialdehyde (MDA), carbonyl groups, and phosphorylated histone H2AX (γ-H2AX) levels in mung bean roots. The MDA and carbonyl group contents induced by 6:2 Cl-PFESA were 1.10–1.35 and 1.03–1.14 times, respectively, those of PFOS. The hydroxyl free radical (·OH) levels in mung bean roots after exposure to PFOS and 6:2 Cl-PFESA were elevated significantly, and the ·OH levels induced by 6:2 Cl-PFESA were higher than those induced by PFOS. Hydroxyl free radical levels were positively correlated with the MDA and carbonyl group contents in mung bean roots ( p < 0.05). The dynamic changes in some antioxidative enzyme activities in mung bean seedlings were determined, including peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT). The results demonstrated the phytotoxicities of 6:2 Cl-PFESA and PFOS to mung bean in the early developmental stage. 6:2 Cl-PFESA is more harmful to mung beans than PFOS. The production of hydroxyl radical is the mechanism that causes the toxicity of PFOS and 6:2 Cl-PFESA toward plants.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yao Tong,Qin Wang,Xiaoting Liu,Enrou Mei,Xiaojuan Liang,Weidong Xiang
All-inorganic CsPbX 3 (X = Cl, Br, I) perovskite nanocrystals (PNCs) hold tremendous prospect in optoelectronics. Different from the previous method of preparing perovskite glass, the self-crystallization of CsPbX 3 (X = Cl, Br, I) PNCs glasses were successfully synthesized by introducing TiO 2 into the glass matrix without subsequent annealing and heat treatment engineering. The effective realization of self-crystallization was attributed to the nucleating agent changing the glass structure which has been confirmed by DSC, XPS, FTIR tests. As a nucleating agent, TiO 2 reduced the crystallization temperature of BSZ glasses and promoted controlled nucleation of PNCs. Surprisingly, the self-crystallized glass with high Photoluminescence quantum yield (PLQY) of 41.2% showed strong hydrothermal stability. After soaking in water for 30 days, the Pb 2+ escaped did not change significantly. The green-emitting LEDs made of BSZ-xTi achieved tunable colour coordinates of (0.1038–0.1177, 0.7376–0.7386). Furthermore, combining BSZ-2Ti with BrI 2 -2Ti on InGaN chip, the wide-color-gamut covering 93.15% of the Rec. 2020 standard was achieved. This study has an important role in guiding the synthesis of time-saving, environment-friendly and low-cost PNCs glasses, which made a contribution to deepening the understanding of the promoting effect of related nucleating agents on nucleation of PNCs.
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MICROCHEMICAL JOURNAL
·
2019
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IF 3.206
Wei He,Zhenxiang Huo,Xiangying Sun,Jiangshan Shen
In this work, we made use of a one-step hydrothermal method for the purpose of synthesizing the multifunctional N, Cl co-doped carbon dots (NCl-CDs) from hexadecylpyridinium chloride as raw materials. The as-prepared NCl-CDs as a fluorescent probe have been put to use to develop a label free fluorescence sensing platform to detect hematin and temperature. The NCl-CDs displays temperature-dependent fluorescence that has a sensational linear feedback between 20 and 80 ℃. Moreover, hematin makes the effective quenching of the fluorescence intensity of NCl-CDs possible on the basis of inner filter effect (IFE). This sensing platform possessed elevated selectivity towards hematin with the detection limit amounting to 0.16 μM, which was further applicable in detecting hematin in human serum samples.
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