JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhen Chen,Cheng Li,Yating Yu,Youzhi Xu,Minghua Chen
High reactivity between single-crystalline high-nickel LiNi x Co y Mn 1-x-y O 2 cathode materials (Ni-rich SC-NCM) and the electrolyte is considered to be the main cause of fast capacity decay. To prevent direct their direct contact, we utilized a wet coating process to uniformly coat the surface of SC-NCM811 with a layer of brominated phosphoric acid tri-p-cresyl ester (Br-TCP) approximately 6 nm in thickness. X-ray photoelectron spectroscopy analysis of a cycled SC-NCM811 electrode indicates that the Br-TCP coating layer not only plays a key role in reducing interfacial side reactions, but also generates LiBr, a Li-ion conductor, due to reactions with surface lithium sources. The presence of LiBr in the coating layer enhances the lithium-ion dynamics and reduces the impact of coating layer on the lithium-ion diffusion within SC-NCM811. Additionally, the strong ionic bonds of LiBr enable enhanced adhesion between Br-TCP coating layer and SC-NCM811, thereby achieving lasting protection effect. Consequently, the synergistic effects provided by the Br-TCP modification layer are beneficial to delivering excellent electrochemical performance. Specifically, the capacity retention ratio is improved from 8.95 % to 55.28 % over 400 cycles at 1 C. We believe the strategy developed herein can provide valuable guidance in designing advanced surface modified cathodes for high-performance lithium (-ion) batteries.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 110
·108583-108589
·
IF 3.289
Zhiming Chen,Leilei Liu,Xiaodong Wu,Renchun Yang
Core–shell Fe3O4/P(St-AA) (Fe3O4/polystyrene–poly acrylic acid) nanoparticles modified with carboxylic acid groups were synthesized and employed as magnetic carriers for Candida rugosa lipase (CRL) and porcine pancreas lipase (PPL) immobilization. The loading amount of CRL on the Fe3O4/P(St-AA) nanoparticles was calculated to be 87.7 mg protein per g particles. Effects of solution pH and reaction temperature on the relative activity of immobilized CRL were measured and compared with the free CRL. The hydrolytic kinetics of the free and immobilized CRL was also investigated. Hydrolytic activity tests indicated that the stability of the immobilized CRL was strengthened. It should be mentioned that the immobilized CRL retained more than 56.1% of its initial activity after reuse 10 times. Most importantly, the immobilized PPL can tolerate organic media and maintain high esterification activity in n-hexane solution. This work provided a facile and general approach to synthesize magnetic functional nanocomposites for applications in biological and biocatalytic fields.
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Polymers
·
2019
·Vol. 11
·期 3
·526
·
IF 3.164
Jiayun Chen,Xiaoying Xiong,Qilong Zhang,Lingling Shui,Shitao Shen,Hui Yang,Zhicai Zhu,Fang Zhang
P(VDF-TrFE) (vinylidene fluoride-co-trifluoroethylene)/PMMA (PVT/PMMA) blended films synthesized through a facile solution-blending method show outstanding performance for practical electrowetting and energy storage applications. The van der Waals forces and dipolar interactions in neighboring P(VDF-TrFE) and PMMA chains, together with the suppressed free volume (or defect) are critical to the significantly-enhanced electrical properties. Typical, Teflon-covered P(VDF-TrFE)/PMMA blended film exhibits a high dielectric constant of 13 with low dielectric loss (~0.05) at 100 Hz and a large initial contact angle of 122°. Its electrowetting response with a contact angle modulation of 50° in air and low contact angle hysteresis demonstrate that it is promising for low-voltage electrowetting applications. Furthermore, with an energy density of 11.8 J/cm3, approximately double that of pure P(VDF-TrFE), PVT/PMMA blended films containing 20 wt % PMMA turn out to be superior materials for energy storage applications, due to their significantly-enhanced polarization and reduced remnant polarization.Keywords:electrowetting;energy storage;dielectric constant;hydrophobicity
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 73
·69580-69585
·
IF 3.289
Xingrong Xiao,Nuoxin Xu,Yongchang Jiang,Qilong Zhang,Enjie Yu,Hui Yang
Ag-loaded TiO2 hybrid particles (TiO2@Ag) were synthesized as fillers by using an ethylene glycol reduction method. Based on this, the TiO2@Ag/P(VDF-HFP) hybrid films were prepared by embedding TiO2 nanoparticles in a poly(vinylidene fluoride-co-hexafluoropropylene) [P(VDF-HFP)] matrix. Morphology and thermal analysis show that the introduction of TiO2@Ag does not disrupt the continuity of the polymer matrix, while the strong interaction between fillers and matrix influences the crystallization process of the composite. The adhesion of Ag to TiO2 efficiently separates the Ag particles from connecting and suppresses the formation of a conductive network, and the ultra-small Ag nanoparticles “trap” the carriers due to coulombic blockade and quantum confinement effect, which results in low dielectric loss and electrical conductivity of the composites. As a consequence, the dielectric permittivity of polymer nanocomposites was enhanced by 300% over the P(VDF-HFP) matrix at a filler content of 30 vol% while maintaining a rather low dielectric loss (0.037 at 1 kHz), demonstrating promising applications in electronic devices.
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Royal Society Open Science
·
2020
·Vol. 7
·期 9
·
IF 2.646
Chengqi Feng,Juan Du,Shuai Wei,Chengrong Qin,Chen Liang,Shuangquan Yao
The efficient separation of bagasse components was achieved by p-toluenesulfonic acid (p-TsOH) pretreatment. The effects of p-TsOH dosage, reaction temperature and reaction time on cellulose, hemicellulose and lignin contents were studied. Eighty-five per cent of lignin was dissolved, whereas the cellulose loss was minimal (less than 8.1%). Cellulose-rich water-insoluble residual solids were obtained. The degree of polymerization of cellulose decreased slightly, but the crystallinity index (CrI) increased from 52.0% to 68.1%. It indicated that the highly efficient delignification of bagasse was achieved by p-TsOH pretreatment. The nanocellulose filaments (CNFs) were produced by the treated samples. The physico-chemical properties of CNFs were characterized by transmission electron microscopy and thermogravimetric analysis. The results show that the CNFs have smaller average size and higher thermal stability. It provides a new method for CNFs.
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 44
·27207-27214
·
IF 3.361
Hongmei Zhang,Yuxiang Chen,Shichao Xu,Jing Wang,Huanhuan Dong,Zhendong Zhao,Jianxin Jiang
In this study, a series of novel p-menthane type secondary amines (sec-p-menthane-7-amine derivatives 3a–3y) were synthesized and then characterized by FTIR, 1H NMR, 13C NMR, and HRMS. The post-emergence herbicidal activities of these amines against barnyard grass and rape were evaluated by the culture dish method. Most of the sec-p-menthane-7-amine derivatives showed excellent herbicidal activities equivalent to or even higher than either diuron or glyphosate. The alkyl-substituted derivatives were more active than the phenyl-substituted derivatives. The herbicidal activities of compounds 3p, 3r, 3u, and 3w against the root growth of barnyard grass were 404% higher, respectively, than those of glyphosate. The herbicidal activities of compounds 3q, 3v, 3w, and 3x against the root growth of rape were 561%, 494%, 491%, and 544% higher, respectively, than those of diuron, and 484%, 760%, 423%, and 665% higher respectively, than those of diuron against shoot growth of rape. In addition, compounds 3p, 3u, and 3v are almost harmless to rice, wheat, sorghum, maize, and peanuts at a concentration of 100 mg L−1. Most of the compounds are nontoxic to HUVEC-C and BALB/c 3T3 cells. It is indicated that the title compounds could be utilized as botanical herbicides for future weed control.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Ne Ni,Xiuzhi Gao,Enhui Xing,Yuan Zhu,Jianqiang Liu,Mudi Xin,Ying Ouyang,Yibin Luo,Xingtian Shu
The promotional effects of phosphorous modification on ZSM-5 zeolites by phosphorus oxyacids (H 4 P 2 O 7 , H 3 PO 4 , H 3 PO 3 , and H 3 PO 2 ) with different molecular sizes were investigated with catalytic cracking of n -tetradecane as the probe reaction. It was verified that the diffusion of P precursor molecules into ZSM-5 channels was important to prevent aggregation of P species for better stabilization on tetra-coordinated framework aluminum . Meanwhile, the P–Al interaction was proposed based on results of 27 Al, 31 P, and 29 Si MAS NMR. With H 3 PO 2 as the P precursor, easy diffusion into ZSM-5 channels contributed to less formation of polyphosphates, homogeneous distribution of P species, better reserved crystallinity, microporous area and acidic sites for improving cracking performance of n -tetradecane.
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 10
·2102374
·
IF 6.389
Zongtao Liu,Wenjie Lin,Zhiming Chen,Daming Chen,Yifeng Chen,Hui Shen,Zongcun Liang
Nonstoichiometric vanadium oxide V 2 O x has been demonstrated to serve as a hole-selective contact in crystalline silicon solar cells. A reaction between V 2 O x deposited by thermal evaporation and silicon can, however, result in a decreased work function (WF) and reduce hole selectivity. A straightforward and workable solution is presented in this study, which partially restores the WF of V 2 O x as deposited on silicon and improving solar cell efficiency, avoiding the use of amorphous silicon. Incorporating WO x into the Ag/V 2 O x 1 /Si structure, to form Ag/WO x /V 2 O x 2 /Si, x 1 < x 2 , the WF determined by nonstoichiometric ratio, i.e., x , of V 2 O x increases, enhancing the field passivation effect and reducing the rear recombination, which leads to a 11 mV increase in open-circuit voltage and a 0.90 mA cm −2 increase in short-circuit current. Finally, the solar cell gains an absolute improvement of ≈1.0% in power conversion efficiency.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ziyan Du,Jingxi Qin,Kang Zhang,Linwei Jia,Ke Tian,Junfeng Zhang,Haijiao Xie
Single atom catalysts with high-catalytic activity have been applied in many fields. In this work, single Fe atoms (FeSA) showed excellent catalytic performance on P-nitrophenol (PNP) degradation with high total organic carbon (TOC) removal rate and high turnover frequency (TOF). The high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) results show that Fe species in FeSA are mainly single Fe atom. X-ray absorption near-edge structure (XANES) and density functional theory (DFT) calculations show that each single Fe atom is anchored by four N atoms in the form of FeN 4 active site. This coordination environment enables FeSA possesses unique geometric configuration and highly uniform active sites, which is conducive to organic pollutant adsorption and peroxymonosulfate (PMS) activation. In addition, FeSA could maintained excellent catalytic activity in complex water bodies containing different anions and humic acids. The active species in the FeSA/PMS system were also investigated. It is found that the main oxidative active species in the system are O 2 •− and 1 O 2 . This work shows that FeSA was a highly efficient single atom catalyst for the degradation of organic pollutants and has a wide application prospect in advanced oxidation processes.
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高影响因子
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
·
2015
·Vol. 99
·期 10
·4485-4494
·
IF 3.337
Zhang Xueqin,Feng Huajun,Liang Yuxiang,Zhao Zhiqing,Long Yuyang,Fang Yuan,Wang Meizhen,Yin Jun,Shen Dongsheng
Low temperature aggravates biological treatment of refractory p -fluoronitrobenzene ( p -FNB) because of microtherm inhibition of microbial activity. Considering the potential characterization of energy supply for microbial metabolism and spurring microbial activity by electrical stimulation, a bioelectrochemical system (BES) was established to provide sustaining electrical stimulation for p -FNB mineralization at a low temperature. Electrical stimulation facilitated p -FNB treatment and bioelectrochemical reaction rate constants for the removal and defluorination of p -FNB at 10 °C were 0.0931 and 0.0054 h −1 , which were higher than the sums of the rates found using a biological system and an electrocatalytic system by 62.8 and 64.8 %, respectively. At a low temperature, microbial activity in terms of dehydrogenase and ATPase was found to be higher with electrical stimulation, being 121.1 and 100.1 % more active than that in the biological system. Moreover, stronger antioxidant ability was observed in the BES, which implied a better cold-resistance and relief of microtherm inhibition by electrical stimulation. Bacterial diversity analysis revealed a significant evolution of microbial community by electrical stimulation, and Clostridia was uniquely enriched. One bacterial sequence close to Pseudomonas became uniquely predominant, which appeared to be crucial for excellent p -FNB treatment performance in the BES at a low temperature. Economic evaluation revealed that the energy required to mineralize an extra mole of p -FNB was found to be 247 times higher by heating the system than by application of electrical stimulation. These results indicated that application of electrical stimulation is extremely promising for treating refractory waste at low temperatures.
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Hong Tian,Yumin Li,Qingping Dai,Shunlang Wei,Bing Lv,Jun Wei,Yupei Qiao
FeVO 4 is recognized as a potential photoelectrode material on account of its relatively narrow bandgap and suitable conduction and valence band positions. However, its photoelectrochemical water splitting performance remains unsatisfactory owing to rapid carrier recombination and poor charge transport capabilities. Herein, a novel p-n FeVO 4 /AgVO 3 heterostructure photoanode was developed by depositing p-type AgVO 3 nanowires onto n-type FeVO 4 nanoporous structures, boosting the PEC properties of the base material. The incorporated AgVO 3 nanostructures enhance light absorption in the visible spectrum, facilitate effective electron-hole separation through optimized interfacial charge transport pathways, and simultaneously extend the carrier lifetime. The built-in electric field in the p-n heterostructure promotes more effective separation and directional motion of photoinduced charge carriers. As a result, the transient photocurrent density of the FeVO 4 /AgVO 3 heterojunction photoanode reaches 0.22 mA cm −2 , which is 3.35 times that of bare FeVO 4 (0.06 mA cm −2 ). Notably, the incorporation of AgVO 3 nanowires significantly improves the photostability of the FeVO 4 photoanode. This work provides a feasible strategy from the perspective of interface engineering for designing high-performance FeVO 4 -based photoelectrodes to enhance photoconversion efficiency.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ying-Jiao He,Liang-Hong Shu,Yan Xiong,Qun-Zeng Huang
Development of highly-efficient heterostructured photocatalysts capable of fully utilizing full solar spectrum has emerged as a focal point in photocatalytic H 2 evolution from water splitting. Herein, Mn 0.2 Cd 0.8 S/MoSe 2 composite was successfully constructed by attaching full-spectrum responsive MoSe 2 nanospheres on surface of Mn 0.2 Cd 0.8 S polyhedra via in-situ hydrothermal process. The optimal Mn 0.2 Cd 0.8 S/MoSe 2 -5wt% composite photocatalyst yielded the H 2 evolution rate of 34.31 mmol g –1 h –1 under full-spectrum light, significantly surpassing the activities obtained under near-infrared (NIR), ultraviolet (UV), visible (Vis), Vis-NIR and UV-Vis light alone. This outstanding property could be attributed to the synergetic effects of p−n heterojunction and photothermal effect, effectively accelerating interfacial charge transfer, elevating reaction system's temperature and expediting surface reaction, thereby promoting the photocatalytic reaction of Mn 0.2 Cd 0.8 S. This study offers a valuable perspective on utilizing MoSe 2 to construct an efficient photothermal-assisted photocatalysis system.
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