Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 22
·5932-5940
·
IF 7.779
Yufei Song,Shaoxin Cui,Zhen Qian,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongping Wu
Three new chalcohalide nonlinear optical crystals, [ASr4Cl][Ge3S10] (A = Na, K) and [KBa4Cl][Ge3S10], have been successfully designed and synthesized by combining the covalent [Ge3S9] clusters and ionic [AB4Cl] frameworks. Their crystal structures were determined by single crystal X-ray diffraction, which showed that all three compounds crystallized in the noncentrosymmetric and polar space group of P63. Three structures are iso-structural and can be seen as salt-inclusion structures with the isolated [Ge3S9] clusters stacked alternately along the c axis and 1∞[ClNaSr(2)3]6+ chains acting as scissors to cut the connection between the [Ge3S9] clusters, which is still rare in the known chalcohalides. The IR and Raman spectra indicate that [ASr4Cl][Ge3S10] (A = Na, K) and [KBa4Cl][Ge3S10] have wide IR transparent windows up to 20 μm. UV-Vis-NIR diffuse reflectance spectra manifest that all three compounds have large band gaps of 3.54, 3.51, and 3.57 eV, respectively. In addition, the title compounds also exhibit large laser damage thresholds (∼12 × AgGaS2) and moderate SHG responses (1.08, 0.91, and 0.82 × AgGaS2, respectively). These properties demonstrate their potential as IR NLO crystals. Furthermore, the influence of the (M + N)/Q ratios (M = IIIA or IVA, N = IB or IIB or cations coordinated as [MxQy] anionic groups; Q = S, Se) on the anionic group structural dimensions was discussed, and the structure–property relationship was also studied based on the first-principles calculations. These may produce some insights for designing new chalcohalides.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhengying Wang,Qi Li,Keyan Sheng,Jiang Huang,Chun Fang,Jiantao Han
“Water-in-salt” electrolytes have enlarged the electrochemical window of aqueous electrolytes to 3.0 V. However, the practical application of this electrolyte faces the challenge of high cost. Recently, we have proposed a low-cost inorganic room temperature molten salt (RTMS) electrolyte with a widened electrochemical window of 3.1 V. Herein, the RTMS electrolyte has been integrated with a hydrophilic polymer by ultrafast polymerization through electron beam irradiation to further enlarge the anode limit, increase the ionic conductivity, and improve the thermal stability. The double-redox-active Prussian blue analogues of the cobalt hexacyanoferrate cathode (NaCoHCF) in the RTMS-based polymer electrolyte prepared by electron beam (EB) irradiation (e-RPE) show electrochemical performance with a high capacity of 137 mAh·g–1 at 1C and 100 mAh·g–1 at 5C. More significantly, at a high temperature of 60 °C, the NaCoHCF electrode in e-RPE exhibits a high capacity of 120 mAh·g–1 at 5C and a high capacity retention of 92% over 100 cycles at 1C. Compared to RTMS, the RTMS-based polymer electrolyte not only expands the hydrogen evolution limit but also shows high thermal stability, which is favorable for the electrochemical performance of NaCoHCF at high temperature. Furthermore, the battery with e-RPE is intrinsically safe and can be widely used in large-scale energy storage and wearable device applications.
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高影响因子
Batteries & Supercaps
·
2021
·Vol. 5
·期 4
·e202100367
·
IF 7.093
Yuyao Zhang,Xiaoying Zhu,Dan Kai,Baoliang Chen
Graphical Towards high energy density SIB : Biomass hyaluronic acid (HA) is developed as a novel binder for high-loading Na 3 V 2 (PO 4 ) 3 cathodes in sodium-ion batteries, which delivers a high reversible capacity, a superior rate capability, and a targeted energy density. Fast ion transport, network volume buffer and stable solid permeable interface are demonstrated along with structure-performance mechanisms. Sodium-ion batteries (SIBs) are considered a promising candidate in green energy storage due to their considerable abundance. The low mass loading (less than 2.0 mg cm −2 ) of SIBs-based cathodes cannot meet the energy density on the practical device level, which is mainly restricted by sluggish Na + transport. To the end, a facile and compatible strategy was demonstrated by utilizing hyaluronic acid (HA) binder to achieve fast ion transport and targeted energy density for Na 3 V 2 (PO 4 ) 3 (NVP) cathodes. As a novel functional aqueous binder, HA allowed cathodic materials to organize the unique conductive network. The network-like electrode structure could buffer volume changes during sodiation/desodiation process and provide bi-continuous charge transport channels for both Na + and electrons at the interface. HA promoted the formation of the stable solid permeable interface films, protecting the electrochemical stability of the cathode and ensuring its good cycle performance. These functions of HA binder enabled that NVP delivered a reversible discharge capacity of 107.3 mAh g −1 at 0.5 C (1 C=117 mA g −1 ), which showed no sacrifice of electrochemical performances with mass loading increasing from 1.1 to 4.4 mg cm −2 . Even at a high rate of 20 C, NVP-HA (loading 4.0 mg cm −2 ) could reserve a good capacity of 76.8 mAh g −1 with the retention of 99.3 % after 2000 cycles. This study provides a novel strategy to achieve high energy density for SIBs in large-scale energy storage.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Tiancheng Dong,Shiyu Liu,Zihe Chen,Yida Lu,Baoqi Gu,Hongyu Luo,Bochuan Deng,Shan Hu,Yongming Sun,Wen Chen
Hard carbon (HC) is widely considered one of the most practical anodes for sodium-ion batteries because of its suitable Na-storage capacity and low cost. Ester electrolytes with high fluoroethylene carbonate (FEC) contents are often adopted to stabilize high-voltage cathodes by forming a robust cathode electrolyte interphase and mitigating parasitic reactions. For HC anodes, however, high FEC contents can aggravate interfacial instability and hinder Na + transport. Here, a bilayer coating consisting of an inner amorphous P x O y layer and an outer carbon layer is engineered on HC. Acting as a reactive interphase precursor rather than a passive coating, the bilayer promotes the in situ formation of a NaPO 3 /Na 3 PO 4 /NaPO x F y -rich inorganic solid electrolyte interphase (SEI) during the initial cycle. This phosphate-based SEI effectively improves Na + transport and interphase stability. Consequently, the modified anode delivers 270 mAh g −1 after 200 cycles at 100 mA g −1 and 71.4 mAh g −1 at 1000 mA g −1 . A full cell with a Na 3 V 2 (PO 4 ) 2 O 2 F (NVPOF) cathode delivers 119 mAh g −1 initially and retains 88.6% of its capacity after 100 cycles within 1.5-4.2 V. This work demonstrates that a reactive phosphate-forming surface layer can regulate SEI chemistry and improve the compatibility of HC with FEC-rich ester electrolytes.
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高影响因子
ENERGY CONVERSION AND MANAGEMENT
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2023
·
IF 10.4
Liangyong Chen,Daocheng Liu,Guoqiang Wei
Integrated Capture and Methanation of CO 2 (ICCM) with H 2 produced from renewable energy is a novel Power-to-Gas technology. The combination of ICCM with CO 2 point source, such as coal-fired power plant, is anticipated, which greatly motivates the investigations into the influences of coal ash on the key performance of dual function material (DFM) used in ICCM process. Via the experimental study on the coal ash impacts, this work explored the adaptability of DFM and ICCM to coal-fired power plant. Na-Ru/Al 2 O 3 DFM and two ashes collected from the electrical precipitators of supercritical coal-fired power plants were used for experiments. It showed that fly ashes contaminated CO 2 adsorbents and active sites of DFMs, and caused successive drops in carbonates conversion and CH 4 selectivity upon cyclic ICCM reactions. The CO 2 -TPD and H 2 -TPSR tests revealed that the declined supply capability of hydrogen atoms by Ru sites, and the increased rate gap between CO formation and the following CO hydrogenation were responsible for the declined methanation ability of ash-contaminated DFMs. The roles of SiO 2 and Fe 2 O 3 phases in ashes were identified, indicating that SiO 2 reacted with adsorbent components and masked Ru sites, and then induced DFM deactivation by affecting the transport processes of key reactants; Fe 2 O 3 successively invaded both Ru sites and Na 2 CO 3 /γ-Al 2 O 3 interface, leading to successive losses in methanation ability and CO 2 desorption capacity with cyclic ICCM reactions.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 4
·043501
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IF 4.316
Kailiang Ren,Zeang Duan,Yuan Li,Lu Zhang,Shumin Han
LaFeO3 as a new negative electrode material for nickel-hydrogen batteries used as energy storage has the advantages of high capacity, advanced temperature resistance, and low cost. However, its conductivity and dynamic performance are poor, seriously hindering its applications. In light of increasing concentration of oxygen vacancies and improving conductivity after replacing A-site elements of the material, here we synthesize low-priced Na doping LaFeO3 oxides, La1−xNaxFeO3 (x = 0–0.8), as the negative electrode by a solid-state reaction method. Studies show that doping Na can reduce particle aggregation, thus helping to increase the surface area of LaFeO3. Therefore, its discharge capacity remarkably increases to 356.7 mAh g–1 (x = 0.6) from 178.8 mAh g–1 (x = 0) at 60 °C, which also maintains 73.4% after 100 cycles for La0.4Na0.6FeO3, elevated by 55.1% compared to LaFeO3. In addition, the high rate discharge ability of an La0.4Na0.6FeO3 electrode at a discharge current density of 1500 mA g–1 reaches 30.7% in contrast to 11.2% for undoped LaFeO3. As such, the La0.4Na0.6FeO3 material with superior cycling capacity is proven to be a more promising electrochemical hydrogen storage electrode compared to LaFeO3, which greatly increases the practical application value of the material.
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高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 5
·1289-1297
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IF 5.958
Zhaoyang Wang,Jinmei Liu,Zijuan Du,Haizheng Tao,Yuanzheng Yue
Na3V2(PO4)3 (NVP) features a three-dimensional open structure, which allows fast migration of Na+ ions, and thus, NVP is a superior cathode material for sodium ion batteries. However, the application of the NVP cathode is limited by its low electronic conductivity. To overcome this limitation, we developed an NVP nanocomposite cathode by doping carbon with bromine (Br) and nitrogen (N) during the sol–gel assisted hydrothermal reaction. The Br- and N-doping leads to the formation of amorphous carbon (a-C) on the surface of NVP particles. The nanocomposite possesses multilevel structures containing both pores with different sizes and aggregated grains (200–300 nm). Since the doped N provides electrons to the carbon matrix, the electronic conductivity of the nanocomposite is enhanced. Br-Doping leads to the drop of activation energy for V4+/V5+ redox reaction. The nanocomposite cathode exhibits a high reversible capacity of 41 mA h g−1 at 10C. Both the superior rate and cycling performances could be attributed to the synergistic effect of the multilevel structure and amorphous carbon.
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Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 20
·5453-5461
·
IF 5.976
Shaohua Fan,Guojun Gao,Shiyu Sun,Sijun Fan,Hongtao Sun,Lili Hu
Absolute quantum efficiency (QE) of up-conversion (UC) materials is still limited to ∼3%, which strongly limits their applications in many areas. Herein, we report highly efficient UC β-NaYF4:Yb3+,Er3+ micro-cylinders prepared via a newly developed Li+/Na+ ion exchange method (IEM) with absolute QE as high as ∼4.0%. A small amount of Li+ is interstitially incorporated in β-NaYF4:Yb3+,Er3+, which not only maintains well the micro-cylindrical morphology but also enhances the emission intensity by ∼40%, doubles absolute UCQE (∼3.0% under a fixed excitation power density of 15 W cm−2), and prolongs the lifetime. The UC excitation profile is composed of a sharp peak at 976 nm and a weak shoulder at 935 nm. The absolute UCQE of Li+/Na+ IEM β-NaYF4:Yb3+,Er3+ is systemically studied over a wide excitation power density of 0.4–100 W cm−2, and we obtained impressively high UCQE of 4.0% under 60 W cm−2 power density, which is among the highest values in the literature. The application of two green UC emissions of Li+/Na+ IEM β-NaYF4:Yb3+,Er3+ in ratiometric thermometers is successfully demonstrated. The high relative temperature sensitivity (SR) of 1113/T2 and excellent repeatability as indicated by three heating–cooling cycles (293–753 K) suggest their promising application as a temperature sensor.
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高影响因子
ADVANCED POWDER TECHNOLOGY
·
2014
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IF 1.642
Renping Cao,Kangbin Chen,Qianglin Hu,Wensheng Li,Hui Ao,Chunyan Cao,Tao Liang
A series of Sr (1 − x − y − z ) MoO 4 : x Eu 3+ , y Bi 3+ , z R + (R + = Li + , Na + , and K + ) phosphors are prepared through solid-state reaction method in air. Eu 3+ doped SrMoO 4 phosphor can show red emission at ∼616 nm under excitation 275 nm and 397 nm light due to the 5 D 0 → 7 F 2 transition of Eu 3+ ion, and its emission intensity can be enhanced after co-doping Bi 3+ owing to energy transfer between Bi 3+ and Eu 3+ ions. The mechanism of energy transfer is discussed by the schematic energy level diagrams of Bi 3+ and Eu 3+ ions. The optimal composition in Eu 3+ and Bi 3+ co-doped SrMoO 4 phosphors is determined to be (Sr 0.92 Eu 0.05 Bi 0.03 )MoO 4 . The emission intensity of SrMoO 4 :Eu 3+ , Bi 3+ phosphor is found to be further improved by using Li + , Na + , and K + ions as charge compensators. These experiment results in the paper are helpful to develop novel and high-efficiency phosphors for white light-emitting diodes.
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高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Hanna He,Qi Zhang,Haiyan Wang,Hehe Zhang,Jiadong Li,Zhiguang Peng,Yougen Tang,Minhua Shao
Inferior electronic conductivity and sluggish sodium ion diffusion are still two big challenges for TiO 2 anode material for Na ion batteries (SIBs). Herein, we synthesize TiO 2 /C composites by the pyrolysis of MIL-125(Ti) precursor and successfully introduce defects to TiO 2 /C composite by a simple magnesium reduction. The as-prepared defect-rich TiO 2-δ /C composite shows mooncake-shaped morphology consisting of TiO 2-δ nanocrystals with an average particle size of 5 nm well dispersed in the carbon matrix. When used as a SIBs anode, the defect-rich TiO 2-δ /C composite exhibits a high reversible capacity of 330.2 mAh g −1 at 50 mA g −1 at the voltage range of 0.001–3.0 V and long-term cycling stability with negligible decay after 5000 cycles. Compared with other four TiO 2 /C samples, the electrochemical performance of defect-rich TiO 2-δ /C is highly improved, which may benefit from the enhanced electronic/ionic conductivities owing to the defect-rich features, high surface area rendering shortened electronic and ionic diffusion path , and the suppress of the TiO 2 crystal aggregation during sodiation and desodiation process by the carbon matrix.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 38
·
IF 1.866
Shuyi Wang,Xiaohui Tian,Jinyu Sun,Jin Liu,Junchao Duan
Na-montmorillonite/polyethyleneimine- g -poly(methyl methacrylate) (Na-MMT/PEI- g -PMMA) nanocomposite latexes were prepared by soap-free emulsion polymerization in the aqueous suspension of Na-MMT. The exfoliated morphology of the nanocomposites was confirmed by XRD and TEM. With the aim of improving morphology and mechanical properties of natural rubber latex (NRL) films, the synthesized Na-MMT/PEI- g -PMMA nanocomposites were mixed with NRL by latex compounding technology. The results of SEM and AFM analysis showed that the surface of NRL/Na-MMT/PEI- g -PMMA film was smoother and denser than that of pristine NRL film while Na-MMT was dispersed uniformly on the fracture surface of the modified films, which suggested the good compatibility between NRL and Na-MMT/PEI- g -PMMA. The tensile strength of NRL/Na-MMT/PEI- g -PMMA films was increased greatly by 85% with 10 phr Na-MMT/PEI- g -PMMA when Na-MMT content was 3 wt % and the elongation at break also increased from 930% to 1073% at the same time. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43961.
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ANALYTICAL CHEMISTRY
·
2017
·
IF 6.32
Lu Li,Yuanyuan Fan,Qingling Li,Renjie Sheng,Haibin Si,Juan Fang,Lili Tong,Bo Tang
Various intracellular metal ions have closely related functional roles in the nervous system. An excess or deficiency of essential metal ions can contribute to neurodegenerative diseases. Thus, the detection of various metal ions in neurons is important for diagnosing and monitoring these diseases. In particular, single-cell analysis of multiple metal ions allows us to not only understand the cellular heterogeneity and differentiation but also determine the actual relationships among multiple metal ions in each individual cell. Aiming at the low efficient single-cell manipulation and interference of complex biological matrices within cells in the existing method for single-cell metal ion detection, in this manuscript, we present a convenient, sensitive, and reliable method to simultaneously identify and quantify multiple metal ions at the single-cell level using a microfluidic system. Using the combination of on-chip electrophoresis separation and multicolor fluorescence detection, we achieved the simultaneous analysis of Na+, K+, Ca2+, and Mg2+ in single PC-12 cells and studied changes in these four metal ions in Aβ25–35-treated PC-12 cells, which is a model of Alzheimer’s disease (AD). The data showed that metal ions imbalances in neuron-like cells may be associated with AD induced by Aβ25–35. This method paves the way for multiple metal ion detection in single neuron-like cells, and the results provide insights regarding synergistic function of multiple metal ions in regulation of neurological diseases at the single-cell level.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）