JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
·
2014
·
IF 2.803
Yan-Qing Wang,Hong-Mei Zhang,Jian Cao,Bo-Ping Tang
Interactions of bisphenol S, a new bisphenol analogue with bovine serum albumin and calf thymus DNA were investigated using different spectroscopic methods and molecular modeling calculation. According to the analysis of experimental and theoretical data, we concluded that hydrophobic interactions and hydrogen bonding primarily mediated the binding processes of bisphenol S with bovine serum albumin and DNA. In addition, the electrostatic force should not be excluded. Molecular modeling studies indicated that the binding site of bisphenol S to bovine serum albumin located in the subdomain IB, while bisphenol S was a groove binder of DNA. In addition, BPS did not obviously induce second structural changes of bovine serum albumin, but it induced a conformational change of calf thymus DNA.
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DOI
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Qiang Zhang,Ning Huang,Zhen Huang,Liangting Cai,Jinghua Wu,Xiayin Yao
The main challenges in development of traditional liquid lithium-sulfur batteries are the shuttle effect at the cathode caused by the polysulfide and the safety concern at the Li metal anode arose from the dendrite formation. All-solid-state lithium-sulfur batteries have been proposed to solve the shuttle effect and prevent short circuits. However, solid-solid contacts between the electrodes and the electrolyte increase the interface resistance and stress/strain, which could result in the limited electrochemical performances. In this work, the cathode of all-solid-state lithium-sulfur batteries is prepared by depositing sulfur on the surface of the carbon nanotubes (CNTs@S) and further mixing with Li 10 GeP 2 S 12 electrolyte and acetylene black agents. At 60 °C, CNTs@S electrode exhibits superior electrochemical performance, delivering the reversible discharge capacities of 1193.3, 959.5, 813.1, 569.6 and 395.5 mAh g −1 at the rate of 0.1, 0.5, 1, 2 and 5 C, respectively. Moreover, the CNTs@S is able to demonstrate superior high-rate capability of 660.3 mAh g −1 and cycling stability of 400 cycles at a high rate of 1.0 C. Such uniform distribution of the CNTs, S and Li 10 GeP 2 S 12 electrolyte increase the electronic and ionic conductivity between the cathode and the electrolyte hence improves the rate performance and capacity retention.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Huaxiong Liu,Biao Chen,Hongye Qin,Ning Wang,Enzuo Liu,Chunsheng Shi,Naiqin Zhao
Transition metal dichalcogenides (TMDs) have been widely studied as a promising sulfur host material in Li-S batteries due to their unique physical and chemical properties. Great efforts have been made to prepare carbon/TMDs, especially graphene/TMDs heterostructures as the cathodes of Li-S batteries. Recently, ReS 2 shows a new 1T′ phase and great potential in Li-S batteries because of its stable structure and a large amount of catalytic active sites. Herein, we prepared a new ReS 2 nanosheets anchored on rGO (rGO/1T′-ReS 2 ) composite as a lithium polysulfides (LiPSs) immobilizer and electrocatalyst for Li-S batteries. The unique pore structure and rGO incorporation can effectively mitigate volume expansion and enhance electronical conductivity. Moreover, the novel 1T′ phase of ReS 2 shows both efficient chemical adsorption function and large electrocatalytic active sites of LiPSs . These advantages have been demonstrated by both characterization techniques and theoretical calculations. As a result, the rGO/1T′-ReS 2 /S nanosheets display significantly enhanced coulombic efficiency, rate performance and cycling stability compared with the rGO/S nanosheets and the rGO/1T′-ReS 2 /S nanospheres.
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2021
·Vol. 28
·期 10
·1647-1655
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IF 2.232
Duan Meng-ting,Wu Meng-rong,Xue Kai,Bian Zheng-xu,Shi Jing,Guo Xing-mei,Cao Fu,Zhang Jun-hao,Kong Qing-hong,Zhang Feng
To improve the sulfur loading capacity of lithium-sulfur batteries (Li-S batteries) cathode and avoid the inevitable “shuttle effect”, hollow N doped carbon coated CoO/SnO 2 (CoO/SnO 2 @NC) composite has been designed and prepared by a hydrothermal-calcination method. The specific surface area of CoO/SnO 2 @NC composite is 85.464 m 2 ·g −1 , and the pore volume is 0.1189 cm 3 ·g −1 . The hollow core-shell structure as a carrier has a sulfur loading amount of 66.10%. The initial specific capacity of the assembled Li-S batteries is 395.7 mAh·g −1 at 0.2 C, which maintains 302.7 mAh·g −1 after 400 cycles. When the rate increases to 2.5 C, the specific capacity still has 221.2 mAh·g −1 . The excellent lithium storage performance is attributed to the core-shell structure with high specific surface area and porosity. This structure effectively increases the sulfur loading, enhances the chemical adsorption of lithium polysulfides, and reduces direct contact between CoO/SnO 2 and the electrolyte.
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 27
·275404
·
IF 3.551
Xinzhe Yang,Xiaofei Liu,Tingting Qin,Xiaoyu Zhang,Wei Zhang,Weitao Zheng
Although there are numerous virtues for lithium sulfur batteries, the notorious shuttle effect and insulated nature are impeding their practical application. To address these issues, here we report the design and synthesis of polypyrrole coated sulfur and cobalt co-doped carbon nanocages (PSCC). It demonstrates that both the performance and stability of the PSCC assisted Li-S batteries are improved. The hollow structure of PSCC bypassed the structural collapse effectively caused by volume expansion of sulfur during the reaction and physically suppressed shuttle effect of the intermediate product polysulfide lithium (LiPSs). Also, LiPSs was also trapped to inhibit the shuttle effect due to the strong adsorption of LiPSs via PSCC. In addition, PSCC can also provide an outstanding electronic conductivity, which will facilitate the next-step reaction of the absorbed LiPSs and enhance electrochemical reaction kinetics. Thus, the excellent rate performance was obtained with high specific discharge capacities of 1300 mAh g−1 at 0.1 C and 1000 mAh g−1 at 0.5 C. Such packaged high-performance positions our design for the ideal electrochemical energy storage devices.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Li He,Di Yang,Hainan Zhao,Luyao Wei,Dashuai Wang,Yizhan Wang,Gang Chen,Yingjin Wei
The confinement and catalysis properties of orthorhombic CoSe 2 as a host material for Li-S battery are studied by theoretical and experimental methods. First-principles calculations show that the (111) surface of CoSe 2 possesses adjacent nucleophilic and electrophilic centers. This bi-polar surface can easily bond the polysulfide molecules and catalyze their conversion reactions. As a result, the decomposition energy barriers of polysulfides are greatly decreased from ∼3.0 eV to 0.2–0.4 eV. Following theoretical prediction, CoSe 2 nanocrystals with specific (111) surface are prepared and embedded in porous carbon nanocages using ZIF-67 metal organic framework as a template. Benefited from the advantages of porous C and CoSe 2 (111) surface, the shuttling of polysulfides is suppressed and their conversion kinetics is facilitated. The Li-S cell using this host material exhibits high capacity and remarkable cycle stability, showing a discharge capacity of 1199 mA·h·g −1 at 0.2C and 400 stable cycles at 1.0C.
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高影响因子
TEXTILE RESEARCH JOURNAL
·
2017
·
IF 1.443
Lili Wang,Xiancheng Wang,Yifeng Shen,Jianzhong Shao,Fuyu Pei
S-triazine di-sulfanilic guar gum (TSG) was successfully prepared by monochlorotriazine di-sulfanilic (TS) and guar gum (GG) in order to improve the printing properties in reactive printing. The results showed that the optimized synthesis condition of TSG was at sodium carbonate solution 1.2 g/L at 90℃ for 75 min through the single-factor experiment. Compared to GG, TSG had better flowability, mainly viscous effects and higher viscosity recoverability, which was more appropriate as a thickener in reactive printing. In the cotton printing experiment, TSG had higher paste add-on, color yield, penetration and levelness than GG. Furthermore, the printing effects of TSG on cotton drew near to those of sodium alginate, which could obtain evenly colored large patterns and excellent outline sharpness.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2012
·
IF 1.289
Pei Chen,Xinbing Chen,Zhongwei An
Crosslinkable sulfonated poly(arylene ether sulfone)s (SPAESs) were synthesized by copolymerization of 4,4′-biphenol with 2,6-difluorobenzil, 4,4′-difluorodiphenyl sulfone, and 3,3′-disulfonated-4,4′-difluorodiphenyl sulfone disodium salt. The corresponding covalent-ionically crosslinked SPAESs were prepared via the cyclocondensation reaction of benzil moieties in polymer chain with 3,3′-diaminobenzidine. The crosslinking significantly improved the membrane performance, that is, the crosslinked membranes had the lower membrane dimensional swelling, lower methanol permeability, and higher oxidative stability than the corresponding precursor membranes, with keeping the reasonably high proton conductivity. The crosslinked membrane ( CS5 ) with measured ion exchange capacity of 1.47 meq g −1 showed a reasonably high proton conductivity of 112 mS cm −1 with water uptake of 42 wt % at 80°C, and exhibited a low methanol permeability of 2.1 × 10 −7 cm 2 s −1 for 32 wt % methanol solution at 25°C. The crosslinked SPAES membranes have potential for PEFC and DMFCs. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Lijun Yan,Di Li,Tingting Yan,Guorong Chen,Liyi Shi,Zhongxun An,Dengsong Zhang
Due to the wide application of carbon-based materials in supercapacitors, the concern of volumetric capacitance becomes increasingly important. In this work, the N,P,S-codoped hierarchically porous carbon spheres (N,P,S-HCS) have been rationally designed and originally fabricated using the silica colloids as hard templates, polyaniline as carbon and nitrogen sources, phytic acid as phosphorus sources, and ammonium persulfate as sulfur sources. Both high volumetric and gravimetric capacitance can be achieved. The as-prepared N,P,S-HCS shows the highest specific capacitance of 274 F g–1 and 219 F cm–3 at a current density of 0.5 A g–1, which reveals a superior performance. Moreover, the cycling ability of the N,P,S-HCS can be maintained over 95% to the initial capacitance at a high current density of 10 A g–1 for 10 000 charge–discharge cycles. This is mainly contributed to the uniform doping of N, P, and S as well as the hierarchically porous structure of the N,P,S-HCS. Finally, we assemble it into the all-solid-state symmetric supercapacitors with high energy and power densities of 3.4 W h L–1 with 804 W L–1, respectively. The N,P,S-codoped hierarchically porous carbon spheres with high density show both good volumetric and gravimetric capacitance, which make it a promising material for supercapacitors in practical applications. The present investigations may develop a new direction for the design of carbon materials for a good balance of both high gravimetric and volumetric capacitance.
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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 32
·11030-11038
·
IF 4.39
Xinhao Cai,Huihui Yan,Zhengwei Yang,Wenru Li,Haoxiang Yu,Lei Yan,Liyuan Zhang,Miao Shui,Yanhua Cui,Jie Shu
With the development of electric vehicles, more and more attention has been paid to the kinetic performance of batteries, which is related to rapid charge/discharge and safety issues. To improve this aspect, Cu2Nb34O87 nanowires covered by nitrogen and sulfur co-doped carbon (Cu2Nb34O87/NSC nanowires) are prepared by electrospinning combined with surface coating. As-prepared Cu2Nb34O87/NSC nanowires present a high ion diffusion coefficient and electronic conductivity, showing good a kinetic performance. Specifically, they deliver a splendid capacity of 311.2 mA h g−1 at 1 C and a superior cycling stability with a capacity fading of 0.031% per cycle upon 1000 cycles. At the same time, the electrochemical and structural reversibility is fully discussed and demonstrated by ex situ XRD, ex situ SEM and ex situ XPS based on the redox couples of Cu2+/Cu+, Nb5+/Nb4+, and Nb4+/Nb3+. Contributing to peculiar physico-chemical properties, Cu2Nb34O87/NSC nanowires are expected to be a candidate material for the anode in lithium-ion batteries.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 3
·964-977
·
IF 3.5
Zhu Q.,Wei S.,Wang C.,Yang X. B.,Zhou B.,Xie Z. X.,Duan Z. Q.,Hu Y. M.
Unique wool-ball shaped nanocrystalline CoS was synthesized using solvothermal method in which dopamine (DA) was added as carbon source to combine with the CoS. The DA in situ polymerized and coated on the CoS particle surfaces during the solvothermal process. N, S co-doped carbon-encapsulated CoS(Co 9 S 8 ) were achieved after a post carbonization. In the composites, CoS(Co 9 S 8 ) nanocrystals and carbon are tightly bound and embedded into the amorphous carbon layer to form a spherical core–shell structure. Hybrid counter electrodes (CEs) fabricated with the product have good conductivity, dispersion and stability due to the synergetic effect between carbon and nanocrystalline CoS(Co 9 S 8 ). Charge transfer through the CE/electrolyte interfaces is improved by dopamine-carbon combination. In the optimal case, PCE of 8.82% of the dye-sensitized solar cells (DSSCs) with the hybrid CEs was achieved, which is close to that of the cell with Pt (8.86%) CE, and is a 41.12% increase compared with that of CoS CE cell with the structure of photoanode/N719/electrolyte (I − /I 3 − )/CE. Moreover, stability of the cells with the composite CEs was greatly improved. The results demonstrate that the as-prepared composites are promising alternatives to Pt-CEs for high-performance DSSCs. The reported preparation method will guide further developments in highly efficient carbon-based catalysts for electrochemistry and energy related applications.
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高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Yonggang Zhao,Qiaogang Song,Zhineng Zhou,Yufei Chen,Ying Zhang,Lang Wu,Xu Su,Xinghuan Hu,Shurong Wang
In the solution method, the surface morphology characteristic of the precursor film is essential for obtaining the high quality of the absorber layer. Herein, the post-heating treatment (PHT) precursor films were adopted to modify the morphology significantly and the effects of different PHT temperatures on the properties of precursor films, absorber layer films, and photovoltaic devices were investigated. The precursor film with a more porous surface could be obtained by PHT, which facilitates the downward diffusion of Se easily during sulfoselenization and the formation of a large-grain-spanning monolayer structure. Furthermore, the Cu 2 ZnSn(S, Se) 4 absorber layer surface holes were significantly reduced, owing to sufficient grain growth during sulfoselenization. As a result, the device efficiency with PHT was increased to 11.07% mainly due to improved Cu 2 ZnSn(S, Se) 4 absorber spectral response. This study might provide a new potential method for adjusting precursor film morphology and thus enhancing the corresponding device performance.
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高影响因子
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