Scientific Reports
·
2016
·Vol. 6
·期 1
·1-9
·
IF 5.228
Wang Jun,Zhu Xuexia,Huang Xin,Gu Lei,Chen Yafen,Yang Zhou
Obscure puffer Takifugu obscurus , a species of anadromous fish, experiences several salinity changes in its lifetime. Cadmium (Cd) is a toxic heavy metal that can potentially induce oxidative stress in fish. The present study aimed to detect the combined effects of Cd (0, 5, 10, 20 and 50 mg L −1 ) and salinity (0, 15 and 30 ppt) on juvenile T. obscurus . Results showed the juveniles could survive well under different salinities; however, with Cd exposure, the survival rates significantly decreased at 0 and 30 ppt. At 15 ppt, tolerance to Cd increased. Cd exposure clearly induced oxidative stress and the responses among different tissues were qualitatively similar. Salinity acted as a protective factor which could reduce the reactive oxygen species and malondialdehyde levels. In addition, salinity could enhance the antioxidant defense system, including superoxide dismutase, catalase and glutathione. Na + /K + –ATPase activity significantly decreased under Cd exposure in gill, kidney and intestine. These findings indicated that Cd could moderate the adaptability of juvenile T. obscurus to high salinity and low salinity played a protective role upon Cd exposure. Thus, the role of salinity should be considered when evaluating the effect of heavy metals on anadromous and estuarine fishes.
研究领域:
环境毒理学
·
鱼类生理学
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高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 23
·5183-5191
·
IF 7.804
Wenbin Li,Jianfeng Huang,Ruizi Li,Liyun Cao,Xifei Li,Shaoyi Chen,Liangliang Feng
Graphical Ordered channels, improved performance : Ordered and bridged nanoblocks-self-assembled VS 4 microspheres are prepared through a facile one-step hydrothermal method. The synergistic effect of (1 1 0)-oriented and bridged structures that collectively construct multidimensional Na + transfer channels in the VS 4 microspheres leads to an electrode that shows dramatically enhanced rate capability when used in Na-ion batteries. Developing 3 D self-assembled nanoarchitectures with well-defined crystal structures is an effective strategy to enhance the electrochemical performances of electrode materials. (1 1 0)-oriented and bridged-nanoblocks self-assembled VS 4 microspheres are controllably synthesized by a facile one-step hydrothermal method. The (1 1 0)-bridged structure sets up open pathways for Na + diffusion among nanoblocks, and the (1 1 0)-oriented structure provides unobstructed pathways for Na + diffusion in the nanoblocks, which collectively constructs multidimensional Na + transfer channels in the VS 4 microspheres, promoting the electrochemical kinetics. As an anode for Na-ion batteries (SIBs), this material exhibits pseudocapacitive Na + storage and excellent rate capability, delivering high capacities of 339 and 270 mAh g −1 at rates of 0.1 and 2.0 A g −1 , respectively, with a capacity retention of 79 % in the voltage window of 0.5–3.0 V. In particular, the reversible capacity reaches 575 mAh g −1 after 300 cycles even at 1.0 A g −1 in the voltage window of 0.05–3.0 V, outperforming those of the ever-reported VS 4 -based anode materials. This work presents an effective strategy to the exploration and design of high-performance anodes for SIBs.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Nature Communications
·
2026
·
IF 15.7
Shi Qinhao,Ning Fanghua,Yu Xuan,Xia Fanjie,Qi Ruijuan,Cheng Guofeng,Qiu Yi,Liang Haoyang,Zheng Hongfei,Zhang Tao,Lu Shigang,Lan Tu,Wu Jinsong,Lyu Yingchun,Chen Huaican,Wen Wen,Yao Zhenpeng,Zhang Jiujun,Lu Jun,Zhao Yufeng
Layered transition metal oxide cathodes (Na x TMO 2 ) demonstrate a classic type of cathode for Sodium-ion batteries (SIBs), however their practical application faces a long-standing challenge of irreversible phase transitions at high voltages, which causes unsatisfied specific energy and cycling stability, particularly for P-type (Na + located at prismatic sites) cathodes. This phenomenon is conventionally ascribed to the Na + re-coordination from prismatic to octahedral (O-type) configuration upon Na + extraction, whereby the TMO 2 slab gliding and abrupt c -lattice change are always coupled, and a straightforward solution to this situation remains elusive. Here, we reveal that, the TMO 2 slab gliding and the lattice contraction can be decoupled, and the rapid lattice contraction under high state-of-charge underlies the fundamental origin for the irreversible phase transitions. By pre-engineering 15.8% O-type stacking faults to a P-type Na 0.7 Mn 0.8 Ni 0.2 O 2 , the dramatic volume variation and irreversible phase transitions at high voltage (4.5 V vs. Na + /Na) can be primarily eliminated. This work advances the understanding on the phase transitions at deep desodiation states, and paves up a feasible way to realize high-energy layered oxides.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Chao Gao,Wenbo Li,Xiaowei Zhou,Haoyu Xu,Qing Zhou,Haifeng Gao,Shumin Qin,Zeran Gao,Wei Yu
Multi-layer crystallization and uncontrollable defects were the main factors that limiting the quality of Cu 2 ZnSn(S,Se) 4 (CZTSSe) films. Here a hybrid crystallization strategy was proposed to simultaneously improve the morphology and defect properties of CZTSSe film. Firstly, we found the variation of the microstructures (constitution, chemical environment of the elements, etc.) in precursor films can greatly alter the grain-growths of CZTSSe films. Detailed characterizations revealed that the chemical environment of S in the precursor film may influence the S-to-Se substitution of the film during the selenization process. This can further affect the grain-growth mechanism and the properties of CZTSSe film. While the S-to-Se substitution of the film mainly occurred below 500°C, the NaSe x on the surface of the film could dominate the grain-growth (Na-mechanism). For this mechanism, the CZTSSe film exhibited bi-layer morphology and relatively high band-tail energy, but shallow-acceptor was detected in the film. The solar cells based on the CZTSSe films reached the efficiency of 10.6%. As a comparison, liquid phase could be generated when the S-to-Se substitution of the film shifted to higher temperature (>500°C). In this condition, the grain-growth would be dominated by the liquid phase (LP-mechanism). Such mechanism can eliminate the multi-layer crystallization and reduce the band-tail energy, but the surface properties of the CZTSSe film was deteriorated and the formation of shallow-acceptor in CZTSSe was inhibited. The fabricated solar cells achieved the efficiency of 10.3%. Based on the results above, a bi-layer precursor film contained sub-layers with different microstructures was proposed to regulate the crystallization of CZTSSe. The co-existence of different microstructures in the precursor film could induce a hybrid grain-growth mechanism for the CZTSSe film (e.g., the Na-mechanism worked on the surface while the LP-mechanism worked in the bottom simultaneously). Such grain-growth mechanism can yield CZTSSe film with uniform morphology and favorable defect properties. The CZTSSe solar cells based on the hybrid grain-growth mechanism achieved the best efficiency of 12.6%. The investigation in this paper would provide new solutions for the crystallization regulation on CZTSSe photovoltaic material.
研究领域:
材料科学
·
光伏技术
·
半导体物理
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Shuo Xing,Jinli Ma,Fudong Zeng,Liangqiang Wu,Yixuan Yao,Yapeng Li,Jianshi Du,Qingbiao Yang,Yaoxian Li
Zinc is one of the essential trace elements in the human body and plays an extremely important role in physiological processes. Therefore, it is necessary to develop a detection method that can be used for real-time, highly sensitive response of Zn 2+ in organisms and has low toxicity. In this work, a novel fluorescent probe NA for Zn 2+ detection based on 1,8-naphthalene dicarboxylic anhydride and dimethylpyridine amine was synthesized. Probe NA has specific recognition and real-time monitoring functions for Zn 2+ . Based on Job's plotting curve, it is inferred that the coordination ratio between probe NA and Zn 2+ is 3:1, forming a complex of [Zn(NA) 3 ] 2+ . The [Zn(NA) 3 ] 2+ exhibits obvious yellow fluorescence at 550 nm. Probe NA can achieve quantitative detection of Zn 2+ with a detection limit of 7.52 × 10 −9 M, with high selectivity and anti-interference ability. Probe NA can stably exist in a wide pH range (2–10). This indicates that it can detect Zn 2+ in complex environments. In addition, based on the low cytotoxicity, high sensitivity, and real-time monitoring characteristics of probe NA, we have expanded it to real-time monitoring of Zn 2+ in organisms (HUVEC cells and live mice), as well as qualitative and quantitative detection of Zn 2+ concentration in food and drugs.
研究领域:
化学
·
生物学
·
医学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Adeel Abbas,Mohammad Nisar,Zhuang Hao Zheng,Fu Li,Bushra Jabar,Guangxing Liang,Ping Fan,Yue-Xing Chen
Recently, rock-salt lead-free chalcogenide SnTe-based thermoelectric (TE) materials have been considered an alternative to PbTe because of the nontoxic properties of Sn as compared to Pb. However, high carrier concentration that originated from intrinsic Sn vacancies and relatively high thermal conductivity of pristine SnTe lead to poor TE efficiency, which makes room for improving its TE properties. In this study, we present that the Na incorporation into the SnTe matrix is helpful for modifying the electronic band structure, optimization of carrier concentration, introducing dislocations, and kink planes; benefiting from these synergistic effects obviates the disadvantages of SnTe and makes a significant improvement in TE performance. We reveal that Na favorably impacts the structure of electronic bands by valence, conduction band engineering, leading to a nice enhancement in the Seebeck coefficient, which exhibits the highest power factor value of 37.93 μWcm–1 K–2 at 898 K, representing the best result for the SnTe material system. Moreover, a broader phonon spectrum is introduced by new phonon-scattering centers, scattered by dislocations and kink planes which suppressed lattice thermal conductivity to 0.57 Wm–1 K–1 at 898 K, which is much lower than that of pristine SnTe. Ultimately, a maximum ZT of 1.26 at 898 K is achieved in the Sn1.03Te + 3% Na sample, which is 97% higher than that of the pristine SnTe, suggesting that SnTe-based materials are a robust candidate for TE applications specifically, an ideal alternative of lead chalcogenides for TE power generation at high temperatures.
研究领域:
材料科学
·
能源工程
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PubMed
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2026
·Vol. 130
·期 29
·7433-7443
·
IF 3.2
Ma Jing,Yamaguchi Toshio,Tseng Jochi,Yamada Hiroki,Yu Zhiwu,Zhou Yongquan
The concentration-dependent local
structure and ion solvation behavior
in sodium triflate NaOTf/dimethoxyethane (DME) electrolytes were systematically
investigated by integrating large-angle X-ray scattering (LAXS) with
atomic modeling, IR, and density functional theory (DFT) calculations
across a range of salt concentrations ( x (NaOTf) =
0, 0.05, 0.1, and 0.2). LAXS data-driven all-atomic modeling reveals
that Na + ions preferentially induce DME to adopt the trans–gauche–trans
(TGT) conformation, with each DME molecule coordinating to Na + in a bidentate chelation mode via both oxygen atoms. Quantitative
analysis of center-of-mass radial distribution functions shows that
the average number of DME molecules coordinating to Na + decreases from 2.2 at x (NaOTf) = 0.05 to 1.1 at x (NaOTf) = 0.2, while the average number of associated OTf – anions per Na + increases from 0.9 to 2.3
over the same concentration range. Pair distribution functions combined
with DFT-optimized cluster geometries indicate that Na + maintains a total coordination number of 5.4–5.8, with concentration-dependent
contributions from the oxygen atoms in both DME and OTf – . The Na + -OTf – contact ion pairs exhibit
two distinct configurations: bidentate (CIPB) with a Na–S distance
of 2.94 Å and monodentate (CIPM) with a Na–S distance
of 3.69 Å. The fraction of CIPB decreases from 56% at x (NaOTf) = 0.05 to 28% at x (NaOTf) = 0.2,
while the fraction of CIPM increases correspondingly from 44% to 72%.
Speciation analysis based on coordination number distributions reveals
that at x (NaOTf) = 0.05, 49% of Na + exists
as [Na-3DME] + , 44% as neutral [Na-1OTf-2DME] 0 , and 7% as anionic [Na-2OTf-1DME] − ; at x (NaOTf) = 0.2, the dominant species becomes [Na-2OTf-1DME] − (35%), followed by [Na-3OTf] 2– (29%),
with only 20% remaining as neutral [Na-1OTf-2DME] 0 . This
systematic evolution from solvent-separated ions to contact ion pairs
and higher-order ionic aggregates with increasing salt concentration
provides a quantitative structural basis for understanding the nonlinear
ionic conductivity behavior in glyme-based sodium electrolytes.
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POLYMER DEGRADATION AND STABILITY
·
2021
·
IF 5.03
Yuanyuan Zhan,Xujuan Wu,Shasha Wang,Bihe Yuan,Quan Fang,Sheng Shang,Chengran Cao,Gongqing Chen
The high flammability and severe melt-dripping during the combustion are the most marked fire hazards for polyesters, such as polylactic acid (PLA). In this work, a bio-based flame retardant (ATMP-NA-Fe) was successfully synthesized by a simple aqueous ionic reaction by using amino trimethylene phosphonic acid (ATMP), nicotinamide (NA) and FeCl 3 •6H 2 O as raw materials. The ATMP-NA-Fe and ammonium polyphosphate (APP) have good synergistic effects on improving the flame-retardant performance and retarding the combustion melt-dripping of PLA. With a 10 wt% total loading of ATMP-NA-Fe and APP (1:1), the limiting oxygen index value of corresponding PLA composite (PLA3) increases from 20.1% to 32.8%, and it passes UL-94 V-0 rating without melt dripping. The cone calorimetry results show that compared with pure PLA, the peak heat release rate, total heat release and average mass loss rate of PLA3 are reduced by 66.4%, 14.9% and 76.7%, respectively. Via the analysis on the condensed and gas phase products, the flame-retardant mechanism of PLA/APP/ATMP-NA-Fe composites is proposed. This work provides a new approach for improving flame-retardant performance of PLA and promoting the utilization of renewable resource.
研究领域:
材料科学
·
化学工程
·
可再生资源利用
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yi-Ning Huang,Mengyan Liu,Chenyang Ye,Huajie Luo,Ji Zhang,Dmitry V. Karpinsky,Shan-Tao Zhang,Yaojin Wang
Ceramic-based dielectric capacitors have gained prominence in research owing to their high relative permittivity, excellent mechanical properties, and temperature stability. BiFeO 3 -based ceramics have captured significant attention in dielectric capacitors attributable to their high saturation polarization. Yet, the high remanent polarization, as well as the low electric breakdown strength, constrains the improvement of their energy storage performances. Herein, we incorporated the A-/B-site complicated component (La 0.5 Na 0.5 )(Mg 1/3 Nb 2/3 )O 3 into the binary solid solution 0.7BiFeO 3 –0.3BaTiO 3 ceramics with morphotropic phase boundary, to enhance the endurance for electric field and reduce remanent polarization by optimizing relaxor behavior. Consequently, a high recoverable energy density of 8.3 J/cm 3 and a high efficiency of 84.6% under 500 kV/cm were obtained in the preferred composition. These results offer a feasible pathway to exploit the high-performance BiFeO 3 -based ceramics for electrostatic energy storage.
研究领域:
材料科学
·
能源存储
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高影响因子
Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Xiaoxue Mao,Zhiyong Xiong,Yuhao Xiang,Shihang Guo,Xin Chen,Hongyang Zeng,Jian Jiang,Sirui Wan,Yi Li,Maowen Xu
Room-temperature sodium–sulfur batteries (RT Na–S) hold great potential for energy storage due to the abundance of sodium and sulfur, low costs, and high theoretical energy density. However, their development is limited by the shuttle effect of polysulfides, slow reaction kinetics, and the growth of sodium dendrites. These issues lead to rapid capacity decay and poor cycling stability, which are difficult to mitigate using traditional separators. Inspired by ion channels in biological membranes, we developed a carboxylate-modified MIL-121/Na separator. Its sub-nanometer channels enable highly selective Na+ transport with an ionic conductivity of 2.27 × 10−4 S cm−1, a migration number of 0.74, and a wide electrochemical window of up to 5.1 V. When applied in RT Na–S batteries, it effectively inhibits the polysulfide shuttle and promotes the reaction kinetics, achieving a first-cycle discharge capacity of 1182 mAh g−1 at a 0.5C rate and stable cycling for over 400 cycles, demonstrating excellent rate performance and long cycle life. Even in pouch cells, the performance can be stabilized at a 1C rate for 100 cycles and the cycle-to-cycle stability can be maintained. This study provides a new strategy for separator design to advance high-performance sodium–sulfur batteries.
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Energy Storage Materials
·
2020
·
IF 16.28
Shengsheng Fan,Meng Lei,Han Wu,Jiulin Hu,Congling Yin,Tongxiang Liang,Chilin Li
High-conductivity solid electrolytes are crucial components for the development of Na-based solid state batteries . However the electrolyte structure prototype and corresponding synthesis method are still lacking. The conventional oxide and sulfide electrolytes are precursor-expensive (e.g. Na 2 S) or energy-intensive in sintering synthesis (e.g. at 1000 °C). Here, we propose a novel anti-perovskite solid electrolyte of Na-rich fluorinated sulfate (Na 3 SO 4 F) benefiting from Mg and Cl co-doping by solid state reaction from low-cost precursors at moderate temperature (500 °C). The tailored dual doping enables an improvement of ionic conductivity by three orders of magnitude close to 10 −4 S cm −1 at 60 °C. The creation of Na vacancies (by aliovalent Mg doping) and lattice expansion (by substituting F sites with larger-sized Cl ions) are responsible for the conductivity upgrade. A Na–Sn/Fe [Fe(CN) 6 ] 3 solid state battery based on Na 2.98 Mg 0.01 SO 4 F 0.95 Cl 0.05 electrolyte can reversibly run with a first discharge capacity as high as 91.0 mAh g −1 and a reversible capacity preserved at 77.0 mAh g −1 . This result paves a way to novel anti-perovskite family of fluorinated sulfates as potential alkali metal ion solid electrolytes beyond already reported A 3 OX (A = Li or Na, X = heavy halogen or hydrogenide anions) anti-perovskites.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Mingyang Gao,Huijun Li,Zhenxin Zhao,Xiaomin Wang
The P2-layered metal oxide cathode materials are crucial for constructing high-rate sodium-ion batteries (SIBs); however, its practical application is hindered by the high Na+ diffusion barrier resulting from Na+/vacancy ordering. Herein, a Li/Zn cosubstitution P2–Na0.67Ni0.33Mn0.67O2 (NLNZM) cathode was synthesized via a sol–gel method assisted with citric acid, which can induce the rearrangement of Na+ sites to disrupt ordered structures. The XRD Rietveld refinement confirms a higher occupancy of Na+ at Nae sites with low diffusion barriers through the Li/Zn cosubstitution. In addition, the highly reversible phase evolution of the NLNZM is confirmed through in situ XRD results, thereby ensuring the stability of the structure with low volume change rate (0.78%). Furthermore, Li and Zn can reduce the surface energy and increase the interlayered distance to achieve rapid interfacial kinetics. As a result, the NLNZM has exhibited a high reversible capacity of 152.8 mAh g–1 and an outstanding rate performance of 103.4 mAh g–1 at 5C. After 200 cycles at 5C, the capacity retention rate is 81.1%. This work proposes a cosubstitution strategy to induce Na+/vacancy disorder for achieving rapid Na+ migration as a cathode material for SIBs.
研究领域:
材料科学
·
电化学
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高影响因子
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