ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Mengjie Zhang,Hong Xiao,Yang Liu,Wenshuo Hou,Xuting Li,Jianlin Deng,Linrui Hou,Changzhou Yuan
The sluggish redox kinetics and intrinsic dissolution of lithium polysulfides (LiPSs) critically hinder the desirable commercialization of Li-S batteries (LSBs). Purposeful modification of separators with multi-functional materials brings enormous room for both efficiently restraining the dissolution and enhancing the solid-liquid-solid conversion kinetics of LiPSs. For this, herein, hetero-architectured CoO-Co 3 O 4 hollow nanotubes (HNTs) are elaborately designed and fabricated via a self-sacrifice template methodology to modify the polypropylene (PP) separator for advanced LSBs. Besides the robust physico chemical adsorption, the endogenous CoO-Co 3 O 4 heterojunction, as authenticated by theoretical calculations and experimental verification, spontaneously creates an interfacial built-in electric field, which simultaneously enhances the active sites, accelerates the bi-directional sulfur conversion, and favors the fast electron/ion transport. Thanks to successful realization of the synergistic “electrostatic capture-energy barrier regulation-directional conversion” effect, LSBs with the hetero CoO-Co 3 O 4 HNTs modified PP separator exhibit significantly improved electrochemical performance with the long-duration cycling stability for 1000 cycles at 5 C, and a large capacity of 631.5 mAh g −1 even at a high sulfur loading (5 mg cm ‒2 ) and low electrolyte/sulfur ratio (8.0 µL mg −1 ). More essentially, our contribution here offers a viable avenue for up-and-coming hetero-catalyst functionalized separator platforms toward next-generation LSBs and beyond.
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高影响因子
ACS Nano
·
2022
·
IF 18.027
Lanxiang Feng,Peng Yu,Xuewei Fu,Zheng-Min Zhang,Kenneth Davey,Yu Wang,Zaiping Guo,Wei Yang
Polar host materials with strong adsorption capacity of polysulfides are designed to limit the shuttle effect in sulfur cathodes. However, a critical problem is to control diffusion and deposition of lithium polysulfides during cycling, which significantly impacts cycling stability and sulfur utilization. Here, we report using a sequential adsorption-guided self-assembly to design two types of core–shell sulfur particles with opposite polysulfide adsorption gradients to explore quantitatively the regulation of polysulfide diffusion and deposition. We show that a positive core–shell design of sulfur particles (PCSD@SP), i.e., polysulfide adsorption capability decreasing from the interior to the exterior of the host, is more effective in restricting polysulfide diffusion and regulating polysulfide deposition than the negative core–shell counterpart (NCSD@SP). As a result, the PCSD@SP electrode with a sulfur loading of 7 mg cm–2 exhibits a stable areal capacity of 6 mAh cm–2 over 130 cycles at 0.2C. At intermittent discharge/charge, the PCSD@SP electrode retains excellent stability compared with the NCSD@SP. We conclude that rational design of positive core–shell active materials can be used to regulate polysulfide diffusion and deposition to boost electrochemical reaction dynamics and performance. The reported findings will be of immediate benefit to a range of researchers in the design of high-performance lithium–sulfur batteries.
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高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
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IF 17.694
Lei Jie,Fan Xiao-Xiang,Liu Ting,Xu Pan,Hou Qing,Li Ke,Yuan Ru-Ming,Zheng Ming-Sen,Dong Quan-Feng,Chen Jia-Jia
The redox reactions occurring in the Li-S battery positive electrode conceal various and critical electrocatalytic processes, which strongly influence the performances of this electrochemical energy storage system. Here, we report the development of a single-dispersed molecular cluster catalyst composite comprising of a polyoxometalate framework ([Co 4 (PW 9 O 34 ) 2 ] 10− ) and multilayer reduced graphene oxide. Due to the interfacial charge transfer and exposure of unsaturated cobalt sites, the composite demonstrates efficient polysulfides adsorption and reduced activation energy for polysulfides conversion, thus serving as a bifunctional electrocatalyst. When tested in full Li-S coin cell configuration, the composite allows for a long-term Li-S battery cycling with a capacity fading of 0.015% per cycle after 1000 cycles at 2 C (i.e., 3.36 A g −1 ). An areal capacity of 4.55 mAh cm −2 is also achieved with a sulfur loading of 5.6 mg cm − 2 and E/S ratio of 4.5 μL mg −1 . Moreover, Li-S single-electrode pouch cells tested with the bifunctional electrocatalyst demonstrate a specific capacity of about 800 mAh g −1 at a sulfur loading of 3.6 mg cm −2 for 100 cycles at 0.2 C (i.e., 336 mA g −1 ) with E/S ratio of 5 μL mg −1 .
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PubMed
高影响因子
CEMENT AND CONCRETE RESEARCH
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2025
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IF 13.1
Minghui Jiang,Xiao Liu,Shiyu Li,Yurui Xu,Simai Wang,Lei Lu,Xinxin Li,Xinru Sun,Chunlei Xia,Ziming Wang,Suping Cui
The internal water migration within calcium silicate hydrate (C-S-H) in dry environments is considered to be the primary factor affecting the volume stability of cementitious materials. In this research, the in-situ polymerization product of plant polyphenol tannic acid (TA) was applied to modify C-S-H based on an organic-inorganic composite modification method. The chemical structure, microstructure, composition, dimensional changes and water migration characteristics of modified C-S-H were analyzed. Experimental results showed that TA improved the polymerization degree of siloxane chains in the C-S-H nanostructure, with a maximum improvement of 80.70%, and increased the interlayer spacing in the C-S-H structure, confirming the modification of C-S-H at the nanoscale, exhibited by 29 Si Nuclear Magnetic Resonance (NMR), X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). This modification by TA optimized the C-S-H nanostructure and microscopic pores, and increased the interlayer and gel pore water content, especially gel pore water increased by 56.53% compared to that of the unmodified C-S-H, revealed by nitrogen adsorption and 1 H LF-NMR. In the dry environment, the blocking and cladding effects of TA on C-S-H effectively inhibited the gel water loss and reduced the drying shrinkage, especially at low TA concentration. This research aims to improve the volume stability of C-S-H by in-situ polymerization product of plant polyphenol, which provides new insights into improving the volume stability of cementitious materials.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Chen-Yan Hu,Xin-Yu Yang,Li-Li Hu,Hao Liu,Jia-Nan Chen,Ling-Mei Gao,Zheng-Yu Dong
The enhanced degradation mechanism of micropollutants by sulfite (S(IV)) activated permanganate (Mn(VII)/S(IV)) process under different pH conditions were investigated in this study. The Mn(VII)/S(IV) process can significantly promote the degradation of sulfamethoxazole (SMX), ibuprofen (IBU), iohexol (IOX) and acetochlor (ACE). Compared with the permanganate (Mn(VII)) process alone, the degradation efficiency of SMX, IBU, IOX, and ACE in the Mn(VII)/S(IV) process increased by 51.6 %, 38.9 %, 43 % and 78.7 %, respectively. The pH value has a significant impact on the degradation of the four target pollutants. The mechanism of the Mn(VII)/S(IV) process was further explored using SMX as a model pollutant. Hydroxyl radicals (HO•), sulfate radicals (SO 4 •− ), and reactive manganese species (RMnS, Mn(III), and Mn(V)) were detected in the process. HO• plays an important role in the degradation of SMX under acidic conditions. At pH= 7, RMnS is the main reactive species. Under alkaline conditions, SO 4 •− plays an important role in the process. Mn(III) and Mn(V) can also be converted into other manganese species. In addition, the possible degradation pathway of SMX was proposed. This work reveals the important role of pH in the generation and transformation of reactive species, and demonstrates the enormous potential of the Mn(VII)/S(IV) process in controlling micropollutants. Considering the complexity of water matrix, future studies can explore the application of the Mn(VII)/S(IV) process in practical water treatment.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jianwang He,Hu Meng,Xiaoxin Wang,Yan Xu,Liang Feng
Hexafluoroethane (CF 3 CF 3 ) is a significant greenhouse gas and a potential threat to the environment as emissions increase. However, there is no simple and effective method to detect CF 3 CF 3 yet. Hence, we first attempted to use metal oxide semiconductor (MOS) gas sensors for CF 3 CF 3 detection. Pristine SnO 2 and S-doped SnO 2 (1–3, representing different S contents) nanoparticles were synthesized. S elements successfully doped into the crystal structure of SnO 2 . The optimized sensor (S-SnO 2 -2) shows excellent CF 3 CF 3 sensing performance at 200 °C. The response value of the S-SnO 2 -2 sensor to 25 ppm CF 3 CF 3 at 200 °C is 13.44, which is significantly higher than the pristine SnO 2 response value of 4.45. The S-SnO 2 -2 sensor also exhibits a short response and recovery time (10 s and 148 s), reliable linear response, excellent selectivity, low limit of detection (0.5 ppm), satisfactory reparability, and good long-term stability. The sensing process of CF 3 CF 3 has been investigated by means of gas chromatography-mass spectrometry (GC-MS). The excellent sensing performance of CF 3 CF 3 in the S-SnO 2 -2 sensor can be attributed to the abundant active oxygen, excellent electron capture capability, and fast charge transfer of S-SnO 2 -2, which also benefits from its smaller grain size. This work is the first to report CF 3 CF 3 sensing using MOS gas sensors and has developed a feasible way for CF 3 CF 3 detection.
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高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Xiaoyu Cao,Xiaomin Qiu,Fan Zhang,Meng Xiao,Tingting Huang,Quanhong Zhu,Zhijie Shang,Hongbing Song
The development of affordable, intelligent dual-separation technology is crucial for the treatment of oil–water mixtures. Pyridinium-based poly(ionic liquid)s (PILs), designed using molecular theory, exhibit unique switching wettability properties, making them ideal for use in both aqueous and oily environments. By prewetting the material’s surface with water or oil, the targeted separation of these components becomes feasible. PILs are synthesized through the cross-linking of [Pyr]Cl with various cross-linkers and auxiliary agents. Studies on the wetting mechanism of these materials have identified bursting pressure and surface structure as key factors influencing their wetting properties. They exhibit hydrophilic and lipophilic properties in air, hydrophobic properties under oil, and oleophobic properties under water, achieving a 99% separation efficiency. A reusability study demonstrated maintenance of 90% efficiency after 10 cycles, highlighting their sustained high performance. This research presents promising avenues for the application of PIL-based materials in oil–water separation, environmental remediation, and industrial processing.
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PubMed
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 9
·4591-4599
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IF 5.8
Ouyang Lin,Lijin Wang,Xiulin Xie,Shuaibing Wang,Yibo Feng,Jiawen Xiao,Yu Zhang,Aiwei Tang
Silver-based I–III–VI-type semiconductor nanocrystals have received extensive attention due to their narrow-band luminescence properties. Herein, we demonstrated a seed-mediated growth of quaternary Ag–In–Ga–S (AIGS) nanocrystals (NCs) with narrow-band luminescence. By conducting partial cation exchange with In3+ and Ga3+ based on Ag2S NCs and controlling the Ag/In feeding ratios (0.25 to 2) of Ag–In–S seeds as well as the inventory of 1-dodecanethiol, we achieved optimized luminescence performance in the synthesized AIGS NCs, characterized by a narrow full width at half maximum of less than 40 nm. Meanwhile, narrow-band luminescent AIGS NCs exhibit a tetragonal AgGaS2 crystal structure and a gradient alloy structure, rather than a core–shell structure. Most importantly, the kinetics decay curves of time-resolved photoluminescence and the ground state bleaching in transient absorption generally agree with each other regarding the lifetime of the second decay component, which indicates that the narrow-band luminescence is due to the slow radiative recombination between trapped electrons and trapped holes located at the edge of the conduction band and the deep silver-related trap states (e.g., silver vacancy), respectively. This study provides new insights into the correlation between the narrow-band luminescence properties and the structural characteristics of AIGS NCs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Jing Wang,Xingyu Niu,Qi Hao,Kun Zhang,Xinyi Shi,Liping Yang,Hui Ying Yang,Jilei Ye,Yuping Wu
Low charge separation efficiency significantly hampers the performance of photocatalytic hydrogen production. Constructing heterojunctions emerges as a crucial strategy to enhance photocatalytic activity by improving charge separation. An S-scheme heterojunction not only effectively separates the photogenerated charge in composite photocatalysts but also preserves optimal redox capabilities. This study presents the first report of CuInS 2 /CeO 2 (CIS/CeO 2 ) and demonstrates how charge separation within CIS/CeO 2 to enhance photocatalytic hydrogen production through the construction of an S-scheme heterojunction. The UV–visible-driven hydrogen production rate of CIS/CeO 2 is 4.6 and 9.4 times higher than that of CIS and CeO 2 alone, respectively. The improved photocatalytic performance primarily stems from enhanced charge separation promoted by the S-scheme heterojunction. The charge transfer pathway was confirmed as an S-scheme mechanism through a combination of band structure experiments, density functional theory (DFT) calculations on work function, internal electric field, and charge differential density distribution, alongside electron paramagnetic resonance (EPR) experiments. Multiple perspectives were employed to elucidate the reasons behind facilitating efficient charge separation. This research provides valuable insights for advancing photocatalytic performance.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Zhuo Ye,Qingwei Wang,Jiantong Qiao,Baoxian Ye,Gaiping Li
A new voltammetric sensor for simultaneous detection of bisphenol A and bisphenol S with high sensitivity has been constructed based on a three-component composite modified glassy carbon electrode. The three-component composite used herein is composed of AuAgPt ternary alloy nanocrystals (AuAgPt), porous β-cyclodextrin polymer (PCD) and oxide graphene (GO), abbreviated as AuAgPt-PCD-GO. The obtained composites were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and scanning transmission electron microscopy (STEM). The proposed modified electrode showed excellent electrochemical response to bisphenol A and bisphenol S simultaneously. Under optimal experiment conditions, the response linear ranges for bisphenol A and bisphenol S are from 6 nM to 4000 nM and 8 nM–8000 nM with detection limits of 2 nM and 2.67 nM (S/N = 3), respectively. Furthermore, this electroanalytical sensor could also be successfully applied to real sample analysis with satisfactory results.
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Energy Storage Materials
·
2020
·
IF 16.28
Muhammad Waqas,Yupei Han,Dongjiang Chen,Shamshad Ali,Cheng Zhen,Chao Feng,Botao Yuan,Jiecai Han,Weidong He
With high energy density and low cost, lithium sulfur (Li–S) batteries own the potential to be next-generation electrochemical storage/conversion devices. However, their cyclic stability and life span are considerably impaired by polysulfide shuttling and self-discharge. Here, we design a microfiber glass filter-molybdenum disulfide/carbon-titanium nitride (μFGF-MoS 2 /C–TiN) interlayer for suppressing the shuttle of polysulfides and self-discharge of Li–S batteries. TiN in the interlayer molecularly captures high-order polysulfide Li 2 S 8 with an adsorption energy up to −6.48 eV, the largest high-order polysulfide absorption value ever reported. The μFGF-MoS 2 layer mechanically seizes polysulfides with interconnected torturous mesopores by functioning as a molecular sieve . With a sulfur loading of 4.5 mg cm −2 , the Li–S batteries based on μFGF-MoS 2 /C–TiN exhibit remarkable over-1000-cycle stability with an only 0.05% capacity decay per cycle and deliver an initial discharge capacity of 1000 mAh g −1 at 1C. The self-discharge is alleviated with an insignificant 10.3% capacity loss after a 30-day rest.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2015
·Vol. 22
·期 5
·1-11
·
IF 1.92
Li Zhi-min,Zhang Gang,Li Yan,Yang Jie
The homo- and co-poly(p-phenyene ether sulfone benzimidazole/sulfide sulfone benzimidazole)s (PESI/PPSSI) had been prepared by solution polycondensation of the mixtures of 4,4′-dicarboxydiphenyl ether (DCDPE) and 4,4′-dicarboxydiphenyl sulfide (DCDPS) with 3,3′,4,4′-tetraanmino diphenyl sulfone (TADS) in polyphosphoric acid (PPA). The FT-IR, 1 H-NMR, DSC, TGA, XRD were used to characterize chemical structure and thermal stabilities of the resultant homo- and co-polymers. The inherent viscosities of the resultant polymers were in the range of 0.621–0.982 dl/g at the polymer concentration of 0.5 %. They were found to have excellent thermal properties with glass transition temperatures (T g ) of 386–393 °C, 5 % weight-loss temperature (T 5% ) of 512–525 °C. These polymers showed amorphous nature as charactered by XRD. Most importantly, the resultant polymers possess good solubility that they can be soluble in various aprotic solvents such as N-methyl-2-pyrolidinone (NMP), dimethyl sulfoxide (DMSO) and 1,3-dimethyl-2-imidazolidinone (DMI) and they could be easily formed transparent, tough and flexible membranes by solution casting method. The membranes showed good mechanical properties: the tensile strengths and Young’s Modulus were in the range of 68.8–98.6 MPa and 2.1–2.8 GPa, respectively.
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高影响因子
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