ACS Applied Energy Materials
·
2025
·
IF 5.5
Azhagar Samy,Raja Palani,Yi-Shiuan Wu,She-Huang Wu,Jeng-Kuei Chang,Arshid Numan,Rajan Jose,Chun-Chen Yang
Rechargeable lithium-oxygen (Li-O2) batteries are at the forefront of energy storage technology. Yet, they face critical challenges, including poor capacity, high overpotential at the oxygen cathode, inefficient lithium utilization, oxygen crossover, and the troublesome growth of lithium dendrites. This study provides an innovative solution using a graphene nanosheet (GNS) composite nickel ferrite (NiFe2O4) (NiFe2O4@GNS) catalyst and ZIF-8 particles decorated glass fiber (GF) (ZIF-8@GF) separator. Remarkably, the in situ grown ZIF-8@GF composite separator boosts higher ionic conductivity (∼2.87 × 10–3 S cm–1) and transport number (tLi+ ∼ 0.58). The modified catalyst and separator performed significantly better than the unmodified analogs in terms of specific capacity and cycling stability. In short, the device using the ZIF-8@GF separator and NiFe2O4@GNS catalyst goes up to 500 cycles without any charge polarization at 300 mA·g–1 and 500 mAh·g–1. In contrast, the corresponding cycle number for the cell with an unmodified separator even using the modified catalyst is ∼209 cycles with high charge polarization. These studies reveal that the modified separator effectively minimizes oxygen and I–/I3– redox crossover, captures anions, accelerates lithium-ion transport, and prevents the harmful intermediates (like O2– or LiO2), which can drastically degrade the organic electrolyte. Furthermore, the insulating characteristics of the ZIF-8@GF membrane deter direct electron transport to ZIF-8 nanoparticles during lithium peroxide formation, thus ensuring uninterrupted access to catalytic anion trapping sites.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2022
·Vol. 15
·期 10
·4289-4300
·
IF 39.714
Chuang Li,Qi Zhang,Jinzhi Sheng,Biao Chen,Runhua Gao,Zhihong Piao,Xiongwei Zhong,Zhiyuan Han,Yanfei Zhu,Jiulin Wang,Guangmin Zhou,Hui-Ming Cheng
Solid-state lithium–sulfur (Li–S) batteries have been recognized as a competitive candidate for next-generation energy storage systems due to their high energy density and safety. However, the slow redox kinetics between S and Li2S and the large volume change of sulfur during charge/discharge have hindered the development of solid-state Li–S batteries. We report a solid-state Li–S battery using a polymer-in-salt solid-state electrolyte, in which the sulfur is anchored in a polyacrylonitrile (PAN) substrate during cycling, avoiding the formation of Li2S and thus resulting in much faster redox kinetics and a smaller volume change than the conventional solid-state Li–S batteries. The quasi-intercalation reaction in the system is achieved with the assistance of the residual N,N-dimethylformamide (DMF), which helps strengthen the C–S bond. As a result, the solid-state Li-sulfurized PAN (SPAN) batteries have a superb rate capability at room temperature, even higher than those of liquid-state Li–S batteries, due to the faster redox kinetics and smaller volume change without solid–solid S to Li2S conversion which is present in liquid-state Li–SPAN batteries. This is the first report of the redox kinetics of solid-state Li–SPAN batteries being increased by changing the bond-strength of the C–S bond instead of using catalysts. This technique opens up new opportunities for designing high-performance solid-state Li–S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 18
·2100156
·
IF 18.808
Wei Sun,Wenqing Zhao,Shaohui Yuan,Liming Zhang,Yue Yang,Peng Ge,Xiaobo Ji
Engineering advanced sodium-ion storage materials with considerable kinetic behaviors have triggered a series of active explorations. However they still suffer from interfacial gaps and uncompleted redox reactions, bringing about poor rate abilities. Herein, through the strategy of salt-fixed and thermochemical manners, the CoSe 2 /O C with interfacial chemical Co O C bonds are successfully prepared, displaying the reduced particles and optimized structural features. Meanwhile, from the analysis of long-term phase changing curves and ex-situ technologies, the CoSe 2 would be decomposed into CoSe and Se phases but captured by the synergistic effect of their physical-chemical evolutions, while the structure and new-type are stabilized after cycling. Profiting from the “bridge” roles of bonds, the electrons are effectively accelerated with the deepening redox reactions. As expected, based on these advantages, the ultra-fast abilities are reached about 346 mAh g −1 at 15.0 A g −1 after 3500 cycles, and their capacity of full-cells are also kept at about 326 mAh g −1 (cathodes Na 3 V 2 (PO 4 ) 3 @C vs anodes CoSe 2 /O C). The detailed analysis of kinetic behaviors strongly demonstrated that the increased interfacial charge storage and conductivities are crucial for promoting the ions-storage abilities. Given this, the rational work is anticipated to provide significant strategies for advanced energy-storage materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 20
·9792-9798
·
IF 3.925
Zhiguo Li,Qingpeng Zhu,Zhaofei Liu,Li Sha,Zhiming Chen
Laccase is an important biodegradation agent as the catalytic degradation could be enhanced in the presence of redox mediators. This work aims to improve the removal performance of immobilized laccase for high concentrations of synthetic dye degradation using 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate) (ABTS), 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and violuric acid (VLA) as redox mediators. The laccase was immobilized on magnetic hydroxyl-functionalized Fe3O4 nanoparticles (Fe3O4–PEG 2000–Cu2+) based on Cu2+ chelation. The immobilized laccase presented relatively high immobilization capacity and activity retention, improved thermostability and pH tolerance, and excellent reusability. The removal performance assay reveals that the immobilized laccase had high and sustainable removal efficiencies for high concentrations of triphenylmethane dyes in the presence of these redox mediators. It should be mentioned that azo and anthraquinone dyes at concentrations of 25–200 mg L−1 could be rapidly oxidized by the immobilized laccase using these mediators in 20–30 min. A recycling degradation study showed that after 10 catalytic runs, the removal efficiency of triphenylmethane, azo and anthraquinone dyes by the immobilized laccase employing these mediators could still reach 78.3–99.9 (%), 63.1–94.6 (%) and 60.5–74.6 (%), respectively. The outstanding dye degradation performances show that the immobilized laccase has a potential application in wastewater treatment and environmental protection.
研究领域:
环境科学
·
生物技术
·
酶学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Yimu Li,Xuling Chen,Jianbo Ji,Lingbing Li,Guangxi Zhai
In this paper, a novel redox-responsive nanoparticles has been designed for targeted delivery of docetaxel (DTX). Chondroitin sulfate (CS) was used to construct the nanoparticles due to the ability of tumor targeting through binding with CD44 receptor that overexpresses on the surfaces of various tumor cells. A redox-responsive small-molecular DTX prodrug was prepared through modifying with cystamine containing disulfide bonds (Cys-DTX). Then the DTX prodrug was grafted to the CS to construct the amphiphilic polymer (CS-ss-DTX). Further, Cys-DTX/CS-ss-DTX nanoparticles were formed by self-assembly of amphiphilic polymer and incorporation of free Cys-DTX prodrug. This category of nanosized DTX delivery system was expected for not only exhibiting high permeability and cytotoxicity of Cys-DTX prodrug, but also targeting transportation of encapsulated redox-responsive Cys-DTX prodrug. According to results of related researches on physicochemical properties and biological evaluation, the novel redox-responsive Cys-DTX/CS-ss-DTX nanoparticles increased amount of DTX released from the nanoparticles in reductive environment, improved permeability in tumor tissues, enhanced cytotoxicity and decreased side effects compared with free DTX. All of these results showed that this kind of Cys-DTX/CS-ss-DTX nanoparticles were worthy of being expectation in tumor chemotherapy in future.
研究领域:
药剂学
·
肿瘤学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Xiao Zheng,Xiaoqi Han,Wenjiao Yao,Liangming Wei,Jie Zhu,Yongbing Tang
The aluminum–sulfur battery is an ideal energy storage device with the merits of low cost, safety, and high energy density. However, due to the poor conductivity of sulfur and its soluble discharge products, the kinetics of sulfur and polysulfide redox reactions are very slow. Herein, a porous flaky Ti3C2Tx-Co host material is designed, which can form a Ti3C2Tx-CoSx heterostructure in situ with sulfur. The unique heterostructure provides many catalytic anchoring sites and active sites for enhancing the adsorption and conversion of sulfur and polysulfides. Compared with pure Ti3C2Tx, Ti3C2Tx-CoSx greatly reduces the decomposition energy barrier of discharge products and accelerates the redox kinetics of sulfur species. The Ti3C2Tx-CoSx@S cathode realizes fast charging at 1 A g−1 and achieves a long cycle life of 1000 cycles with discharge capacities in the range of 215–358 mA h g−1. Even at 1.5 A g−1, the cathode can still achieve a capacity greater than 190 mA h g−1 for over 1500 cycles. Using Ti3C2Tx-Co as the host of sulfur, a reversible redox reaction among S, S− and S2− occurred during the charge–discharge process, indicating its potential for use in high-performance Al–S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2016
·Vol. 15
·期 11
·1442-1447
·
IF 2.235
Xu Ruixin,He Minghui,Yang Jianwen
Benzoylformamides (BFAs) are proposed as photocaged bases for redox free radical photopolymerization (FRP). Initially the dissolving capacity of BFAs was evaluated. Besides our previously reported photo-latent anion polymerization, BFAs, as versatile photocaged bases, can not only initiate the FRP of acrylates unassisted, but also perform redox FRP in combination with a benzoyl peroxide initiator. We detail a model photopolymerization in the presence of BFA-dBA ( N , N -dibenzyl-2-oxo-2-phenylacetamide) as the photocaged base. In combination with a benzoyl peroxide initiator, BFAs are able to initiate the amine-mediated redox photopolymerization of acrylates, and enhance the photopolymerization rate. Finally, we investigated the mechanism of the radical formation to initiate the redox FRP, as exemplified by BFA-dBA.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yifan Yun,Ying Guan,Yongjun Zhang
Patterned hydrogel films are attractive for the generation of 3D multicellular spheroids, a new in vitro cell model. Traditional methods for their synthesis, such as photolithography and micromolding, usually require a template and are difficult to fit into commercial cell culture plates. Here a simple method to synthesize patterned poly(2-hydroxyethyl methacrylate) (PHEMA) films were developed. First PHEMA films were synthesized in situ in the wells of cell culture plates by bulk redox polymerization of the monomer. Films with a corrugated surface were usually obtained. Fortunately a narrow range of initiator concentration was identified in which smooth films could be obtained. Then water was added to swell the films and wrinkling patterns were produced spontaneously. The shape and size of the patterns can be controlled by adjusting cross-link density and film thickness. Under optimized conditions, films with regular hexagonal patterns were obtained successfully. The patterned PHEMA films were further used to generate multicellular spheroids. The resulting spheroids exhibit high viability and narrow size distribution.
研究领域:
生物材料学
·
细胞生物学
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2015
·
IF 9.312
Kunfeng Zhao,Hailian Tang,Botao Qiao,Lin Li,Junhu Wang
Au/γ-Fe2O3 and Au/α-Fe2O3 catalysts with identical size of Au nanoparticles, chemical state of Au species, and amount of surface OH– group were prepared. The Au/γ-Fe2O3 catalyst exhibited exceptionally high activity, regardless of the heat treatments. The CO-TPR, sequential pulse reaction, and in situ Raman spectra demonstrate that the much higher activity of Au/γ-Fe2O3 originated from its higher redox property at low temperature. Systematic study shows that this higher-redox-property-based higher activity could be extended to γ-Fe2O3-supported Pt-group metals and to other reactions that follow Mars–Van Krevelen mechanism. This finding may provide a new avenue for catalyst improvement or development by choosing the suitable crystal phase of the oxide support.
研究领域:
催化化学
·
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 19
·e202300658
·
IF 8.4
Yanrong Wang,Shigui Qiu,Dunyong He,Jiandong Guo,Mengfan Zhao,Chenxi Zheng,Xuemei Wang,Caixing Wang
Graphical A novel molecule (PTDM) containing n-type and p-type redox sites was prepared. By exploiting the synergistic advantages of two-type redox sites of PTDM, the aqueous PTDM//Zn cell delivers a high average voltage of ~1.13 V, a decent specific capacity of 118.3 mAh g −1 at 0.1 A g −1 and moderate capacity retention of 65.6 % over 6400 cycles at 1 A g −1 . Aqueous zinc ion batteries (AZIBs) are gaining popularity as advanced energy storage devices that are economical, safe, and use resource-abundant storage options. In this study, we have synthesized a bipolar phenothiazine organic scaffold known as 3,7-bis(melaminyl)phenothiazin-5-ium iodide (PTDM), which is obtained by undergoing nucleophilic substitution through phenothiazinium tetraiodide hydrate (PTD) and melamine. Electrochemical results indicate that PTDM can act as a high-potential cathode material for rechargeable AZIBs. In detail, the aqueous PTDM//Zn full cell exhibits a high average voltage of approximate 1.13 V, along with a specific capacity of 118.3 mAh g −1 at 0.1 A g −1 . Furthermore, this demonstrated cell displays moderate long-term cycling stability over 6400 cycles, which is encouraging and suggests potential for developing advanced organic electrode materials for rechargeable AZIBs.
研究领域:
化学
·
能源材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yezi He,Jerosha Ifthikar,Lie Yang,Zhuqi Chen
A cross-linked chitosan-modified birch sawdust biochar (CS@BSBC) was prepared and applied for the simultaneous elimination of vanadium (Ⅴ) and sulfamethoxazole (SMX) from livestock wastewater. The adsorption capacity of V(V) reached 110 mg/g alone while this value was promoted to 150 mg/g for the simultaneous removal of SMX and V(V), and the adsorption effect is optimal at pH 3. The adsorption capacity of SMX reached about 30 mg/g alone, while the SMX’s adsorption capacity droped to 25 mg/g for the simultaneous removal of SMX and V(V). The mechanism studies disclosed that redox reactions occur on the surface of CS@BSBC. As revealed by the XPS spectra, 63 % of V(V) was reduced to V(IV) concurrently pyrolic nitrogen and C−O terminals were oxidized to nitrogen oxide and C O. The treatment mechanism of CS@BSBC described above can provide a reference for the subsequent treatment of livestock wastewater with complex composition and high vanadium content.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengfang Shang,Bowen Zhou,Huiqian Qiu,Yuecheng Gong,Liantao Xin,Weiping Xiao,Guangrui Xu,Chunlong Dai,Huadong Zhang,Zexing Wu,Lei Wang
Developing electrocatalysts with high activity and durability for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes remains challenging. In this study, we synthesize a self-supported ruthenium-iron oxide on carbon cloth (Ru-Fe-O x /CC) using solvothermal methods followed by air calcination. The morphology of the nanoparticle exposes numerous active sites vital for electrocatalysis. Additionally, the strong electronic interaction between Ru and Fe enhances electrocatalytic kinetics optimization. The porous structure of the carbon cloth matrix facilitates mass transport, improving electrolyte penetration and bubble release. Consequently, Ru-Fe-O x /CC demonstrates excellent catalytic performance, achieving low overpotentials of 32 mV and 28 mV for HER and 216 mV and 228 mV for OER in acidic and alkaline electrolytes, respectively. Notably, only 1.48 V and 1.46 V are required to reach 10 mA cm −2 for efficient water-splitting in both mediums, exhibiting remarkable stability. This research offers insights into designing versatile, highly efficient catalysts suitable for varied pH conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）