ACS Applied Materials & Interfaces
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2024
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IF 8.3
Lixun Cheng,Xiaonan Luo,Binghui Ge
Na2Ti3O7 has attracted significant attention due to its ecofriendliness and cost-effectiveness for sodium-ion batteries. However, their limited cycling stability hampers their practical applications. Herein, we elucidate a mechanism of structural degradation caused by the heterogeneous phase transition in the Na2Ti3O7 anode using aberration-corrected (scanning) transmission electron microscopy (S)TEM and in situ TEM. It is found that the unevenly distributed phase transition results in the accumulation of strain, which promotes the growth of microcracks and eventually leads to structural decomposition and electrochemical failure. Motivated by this degradation mechanism, nanowires were proposed, and the structural stability is thus improved with the lattice strain effectively released. These findings deepen our understanding of ion transport and degradation mechanisms in intercalated layered electrode materials while emphasizing the significance of the material structure engineered for improving electrode performance.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
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2014
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IF 4.384
Tao Wang,Yunchao Long,Lvdan Liu,Xiaowen Wang,Vincent S. J. Craig,Guangzhao Zhang,Guangming Liu
We have investigated changes in the cation-specific conformational behavior of poly(sodium styrenesulfonate) (PSS) brushes as the solvent changes from water to methanol using a quartz crystal microbalance with dissipation (QCM-D). A solvation to desolvation transition of the grafted chains accompanied by swelling to the collapse transition of the brushes is observed for Na+. In the case of Cs+, the brushes undergo solvation to desolvation to resolvation accompanied by swelling to collapse to reswelling transitions. The resolvation and reswelling transitions for Cs+ are induced by the charge inversion of the brushes via van der Waals interactions between Cs+ and the brushes. All of the transitions for monovalent cations become less obvious as the methanol content increases. For divalent Ca2+ and trivalent La3+, a solvation to desolvation to resolvation transition of the grafted chains accompanied by a swelling to collapse to reswelling transition of the brushes can be observed. The resolvation and reswelling of the brushes for the multivalent cations are induced by the charge inversion of the brushes via charge-image charge interactions. The extent of the transitions for the PSS brushes in the presence of multivalent cations is only slightly influenced by the methanol content.
研究领域:
材料科学
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物理化学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
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2018
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IF 5.651
JiaKai Mao,Jia Li,Zhengming Xu
The wider application of lithium ion batteries brings more production of spent ones to be recovered. There is a pyrometallurgical treatment by getting negative and positive materials burning together. The paper provides theoretical analysis and support for the feasibility of the treatment. Positive material graphite's burning and pyrolysis of negative material lithium cobalt oxide can make up as a coupling reaction, decreasing the decomposition temperature of lithium cobalt oxide from 1426 K to 1173 K. From the point view of crystal structure, the stronger attraction of graphite to oxygen than lithium and cobalt make oxygen octahedrons insides lithium cobalt oxide unstable to break down. We definite the phenomenon as the oxygen octahedrons collapsing model. Coupling reaction theory and crystal structure analysis indicate that graphite does promote the pyrolysis of lithium cobalt oxide. The study can guide industrial application to recover lithium ion batteries whose structure is similar to oxygen octahedrons at a comparatively low temperature.
研究领域:
冶金学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2022
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IF 4.177
Weifeng Su,Ning Yan,Fan Liu,Zigeng Liu,Guangqi Zhu,Songrui Wang,Xingjiang Liu,Wei Wang
The attenuation process of the oxygen reduction reaction (ORR) catalytic performance for Fe SAC@G catalysts under different discharging conditions, including KOH concentrations, solution temperatures, and discharging potentials, was investigated by electrochemical measurements. The ORR catalytic activity attenuation resulting from the change in KOH concentration and temperature becomes apparent in a negative discharging potential range and elevated discharging temperature. In addition, the more negative discharging potential significantly causes the ORR catalytic activity attenuation. Scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy analyses indicate that, with the prolongation of the discharge time, the nanocolumns of the as-prepared catalyst gradually dissolve, while a flowerlike discharge byproduct composed of elements C and N keeps growing on the surface of the catalyst. The weakest Fe–N bonds first break, resulting in the attenuation of the ORR catalytical performance. Then, the weak C–Cunit bonds connecting the structural units of the catalysts break, leading to the gradual collapse in the structure of the catalysts. The Fe–N4 coordination structure gradually transforms into Fe–N3, Fe–N2, and Fe–N coordination structures. Based on the analyses combined with the density functional theory (DFT) calculations of bond strength, a discharge attenuation mechanism of the structural collapse of the catalyst for the formation of the discharge byproduct with ring structure is proposed.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Rui Zhang,Jingjing Xue,Yuan Li,Bing Cao,Pei Li
To suppress pore collapsing and selective layer thickening of Poly (pyromellitic dianhydride-co-4,4’-oxydianiline) (PMDA-ODA) nanofiltration (NF) membrane during imidization, we proposed a novel two step method. Specifically, a PMDA-ODA polyamic acid (PAA) polymer dope was cast on top of a non-woven polyester fabric and then underwent non-solvent induced phase inversion to form a PMDA-ODA PAA membrane. The membrane was subsequently dried by solvent exchange and chemically imidized to form PMDA-ODA PI membrane. Compared with the thermally imidized PMDA-ODA PI membrane, which had a thick selective layer of 14.5 μm and pure water permeability of 1.5 L/(m 2 ·h·bar), membrane fabricated using the new method had a thinner selective layer of 1.04 μm and 7 times higher pure water permeability of 10.4 L/(m 2 ·h·bar) without losing rejections. Other than that, the NF membrane also showed good separation properties in organic solvent systems. It showed rejections of 87%~95% to Rose Bengal in DMF, THF, and DMSO, with stable permeabilities of 6.1–8.0 L/(m 2 ·h·bar), at a trans-membrane pressure of 20 bar for at least 24 h. Therefore, the PMDAODA PI membranes had great potential for NF in both water and organic solvent systems.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Jingcong Hu,Chenghao Bi,Xuetao Zhang,Bohai Tian,Yue Lu,Jianjun Tian,Manling Sui
With the rapid development of all-inorganic CsPbX 3 (X = I, Br, and Cl) perovskite light-emitting diodes (PeLEDs), their external quantum efficiency (EQE) has made great progress in the last few years. However, severe performance degradation at the operation condition impedes its large-scale industrial application. In this text, by using the advanced spherical aberration corrected transmission electron microscope (TEM), the degradation pathway of PeLEDs under bias loading was more systematically and comprehensively, especially from the viewpoint of its microstructural evolution pathway, which showed that iodine vacancy migration triggered the structural collapse was the primary inducement of performance decay. To solve this problem, inorganic termination ZnI 2 was employed to passivate the surface halide vacancy defects and supplement the halide ion into the lattice, which significantly improves the photoluminescence (PL) lifetime and stability of CsPbI 3 quantum dots (QDs). As expected, not only the EQE of PeLEDs has been greatly improved, but also the operating half-lifetime is enhanced by about 4 times as compared with the original one. Microstructural characterization and density functional (DFT) calculations confirm that the preferential segregation of Zn element on the surface of QDs was the principal cause to passivate the defect state of QDs, which exhibits lower formation energy and better operational stability.
研究领域:
材料科学
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光子学
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半导体物理
✓ 已验证
DOI
高影响因子
Nano Energy
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2025
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IF 17.1
Yujing Wu,Ziqi Zhang,Dengxu Wu,Fuqiang Xu,Mu Zhou,Hong Li,Liquan Chen,Fan Wu
Sulfide solid-state electrolytes (SEs), prized for high ionic conductivity and mechanical strength, face practical challenges due to multi-field coupling failures under operational stresses. While prior studies emphasize electrochemical degradation (e.g., interfacial reactions, Li dendrites), thermal failure mechanisms during high-temperature storage remain overlooked. This work systematically explores calendar aging in sulfide-based all-solid-state batteries (ASSBs). Among tested systems, LiCoO₂ (LCO), Li 6 PS 5 Cl, and Li-In alloy exhibit superior stability after high-temperature storage. However, high-voltage LiNi 0.8 Co 0.1 Mn 0.1 O₂ (NCM811) undergoes structural collapse, releasing decomposition products that accelerate interfacial reactions and thermal failure. Batteries at high states of charge (SOC) experience intensified self-discharge-driven electrode-electrolyte reactions at elevated temperatures. In contrast, LCO-Li 6 PS 5 Cl-LiIn ASSBs at 0 SOC retain nearly undegraded performance after 5 days at 90°C. Suppressing the detrimental H3-phase transition in NCM811 improves capacity retention by ≥21%. The study elucidates high-temperature degradation pathways in sulfide ASSBs, linking thermo-electro-chemical coupling effects to interfacial ion transport barriers and contact degradation. These insights advance the understanding of calendar aging mechanisms, providing critical guidance for predicting battery lifespan and designing robust electrode/electrolyte systems.
研究领域:
材料科学
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电化学
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储能
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电池技术
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热稳定性
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
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2024
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IF 10
Xiao Zhang,Penghui Liu,Ran Zhang,Wenhong Zheng,Di Qin,Yinghang Liu,Xin Wang,Tongyi Sun,Yuanyuan Gao,Li-Li Li
The incorporation of well-designed antibiotic nanocarriers, along with an antibiotic adjuvant effect, in combination with various antibiotics, offers us an opportunity to combat drug-resistant strains. However, precise control over morphology and encapsulated payload release can significantly impact their antibacterial efficacy and synergistic effects when used alongside antibiotics. Here, we focus on developing lipopeptide-based nano-antibiotics, which demonstrate an antibiotic adjuvant effect by inducing pH-induced collapse and negative-charged-surface-induced deformation. This enhances the disruption of the bacterial outer membrane and facilitates drug penetration, effectively boosting the antimicrobial activity against drug-resistant strains. The modulation regulations of the lipopeptide nanocarriers with modular design were governed by us. The nanoantibiotics, made from lipopeptide and ciprofloxacin (Cip), have a drug loading efficiency of over 80%. The combination with Cip resulted in a significantly low fractional inhibitory concentration index (FIC) of 0.375 and a remarkable reduction in the minimum inhibitory concentration (MIC) of Cip against MDR E. coli (clinical isolated strains) by up to 32-fold. The survival rate of MDR E. coli peritonitis treated with our nanoantibiotics was significantly higher, reaching over 87%, compared to only 25% for Cip and no survival for the control group. Meanwhile, the nanoantibiotic showed no obvious toxicity to major organs. This article is protected by copyright. All rights reserved
研究领域:
药学
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纳米技术
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微生物学
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传染病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Aniu Qian,Anning Song,Hao Wu,Zhenzhen Du
Faradic capacitive deionization (CDI) has emerged as an ideal candidate for developing effective water purification from low-concentration desalinated water. However, long-term desalination-stability CDI still faces the challenge in unstable electrode microstructure after hundreds of ion intercalations. Herein, ethylenediaminetetraacetic acid (EDTA)-modified Ti 3 C 2 T x (denoted as EDTA-Ti 3 C 2 T x ) electrodes are proposed through intense chemical interactions without scarifying Ti 3 C 2 T x electronic conductivity, wherein the formed –COO-terminated bridge stabilizes Ti 3 C 2 T x interlayer spacing for strengthening long-term regeneration desalination. Simultaneously, abundant Na + adsorption sites with highly hydrophilic surface in the binder-free high-conductivity EDTA-Ti 3 C 2 T x accelerated ion electro-sorption with efficient ion permeations. Importantly, in 500 mg L −1 NaCl solutions, EDTA-Ti 3 C 2 T x //activated carbon (AC) assembled CDI device delivered an extremely stable adsorption/desorption with salt adsorption-capacity (SAC) retention of 83 % after 500 cycles and a high desalination capacity of 51.0 mg g −1 . In addition, the EDTA-Ti 3 C 2 T x presented without d -spacing changes after 100 cycle desalinations that was significantly different from structural collapse in Ti 3 C 2 T x . This study offers a new idea to overcome poor electrochemical desalination stability via organic molecules stabilized Ti 3 C 2 T x structure.
研究领域:
环境科学
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材料科学
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水处理
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2020
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IF 3.421
Jinsheng Sun,Xiaofeng Chang,Fan Zhang,Yingrui Bai,Kaihe Lv,Jintang Wang,Xinyu Zhou,Bo Wang
Wellbore instability and formation collapse are crucial issues in the process of well excavation in the oil industry under extreme salinity and high-temperature conditions. This study demonstrates that a salt-responsive zwitterionic polymer brush (NS-DAD) based on modified nanosilica as a fluid-loss additive utilizing the anti-polyelectrolyte effect in water-based drilling fluids (WDFs) to overcome the wellbore instability caused by the failure of polyelectrolytes at extreme salinity and high temperature. Additionally, a nonionic polymer brush (NS-D), an anionic polymer brush (NS-DA), and a cationic brush (NS-DD) were also prepared for comparison. Compared with NS-D, NS-DA, and NS-DD, NS-DAD exhibited the anti-polyelectrolyte phenomenon, in which the sodium chloride electrolyte shields the electrostatic interaction in the molecular chain of the polyzwitterion and the molecular structure changes from a collapsed sphere to a more open helix. Macroscopically, NS-DAD exhibited a higher viscosity than NS-D, NS-DA, and NS-DD in saturated salt-based mud (SSBM). A typical “star-net” structure was observed between NS-DAD and the bentonite layer. Energy-dispersive spectroscopy (EDS) analysis of filter cakes showed that NS-DAD could significantly reduce the content of chloride and sodium ions in the bentonite layer. Therefore, compared with NS-D/SSBM, NS-DA/SSBM, and NS-DD/SSBM, NS-DAD/SSBM had excellent rheological properties, thermal stability, less fluid-loss volume, and thinner filter cake under extreme salinity and high-temperature conditions. The fluid-loss additive can be used to reduce the fluid-loss volume of WDFs in harsh reservoir conditions of high temperature and high salinity.
研究领域:
石油工程
·
材料科学
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化学工程
✓ 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）