FOOD CHEMISTRY
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2019
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IF 5.399
Zhibing Huang,Lijuan Zhang,Yanling Wang,Heng Gao,Xiujiang Li,Xinyu Huang,Ting Huang
The mycotoxin citrinin is often produced during fermentation of Monascus products. We studied the effects of flavonoids on citrinin production by Monascus aurantiacus Li AS3.4384 (MALA) by adding rutin, α-glucosylrutin, or troxerutin to the fermentation medium, in a first-of-its-kind study. Appropriate amounts of rutin, α-glucosylrutin, or troxerutin did not affect normal mycelial growth. Addition of 5.0 g/l of rutin only weakly reduced (29.2%) citrinin production, relative to inhibition by 5 g/l α-glucosylrutin or troxerutin (by 54.7% and 40.6%, respectively). In starch inorganic liquid culture media, addition of 20.0 g/l of troxerutin, followed by fermentation for 12 days, reduced citrinin yield by 75.26%. Addition of 15.0 g/l of troxerutin to low-starch peptone liquid fermentation media reduced citrinin yield by 87.9% after 14 days of fermentation, and addition of 30.0 g/l troxerutin to yeast extract sucrose liquid media for 12 days reduced citrinin yield by 53.7%.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2018
·
IF 3.235
Mengqi Du,Yanshuang Meng,Chen Wang,Chaoyu Duan,Fuliang Zhu,Yue Zhang
A novel nitrogen‑sulfur co-doped porous carbon (NSPC) material was synthesized by using ionic liquids as the nitrogen and sulfur precursor. This material exhibited porous structure with high specific surface area (701 m 2 g −1 ) and superior nitrogen and sulfur co-doping (4.66 and 1.83 wt%, respectively), The materials was used as anode materials for Lithium-ion batteries and showed a high reversible capacity of 987.7 mAh g −1 at a current density of 0.1 A g −1 and a good long cycle performance (337.5 mAh g −1 at 5 A g −1 after 5000 cycles). The NSPC's superior electrochemical performance can be attributed to three points: (1) Excellent pore structure (surface area is 701 m 2 g −1 ). (2) Nitrogen and sulfur co-doping (4.66 and 1.83 wt%, respectively). (3) Higher rate of capacitance contribution during process of charge and discharge.
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ChemSusChem
·
2018
·Vol. 11
·期 23
·4060-4070
·
IF 7.411
Huimin Zhou,Xin Xia,Pengfei Lv,Jin Zhang,Xuebin Hou,Min Zhao,Kelong Ao,Di Wang,Keyu Lu,Hui Qiao,Malgorzata Zimniewska,Qufu Wei
Graphical Better anode by design : A designed anode structure combining the metallic conductivity of 1T-MoS 2 with interconnected TiO 2 /MoO 3 grains is beneficial for fast charge-transfer reactions and reduced transmission losses. Moreover, a flexible carbon framework buffers swollen lithium compounds, such as Li x MoO 3 and Li x MoS 2 , and supports the shrinking delithiated products, with potential for achieving high capacity stability in both Li- and Na-ion batteries. Integrating layered nanostructured MoS 2 with a structurally stable TiO 2 backbone to construct reciprocal MoS 2 /TiO 2 -based nanocomposites is an effective strategy. C@TiO 2 /MoO 3 composite nanofibers doped with 1T-phase MoS 2 nanograins were fabricated by partially sulfurizing MoO x /TiO 2 precursors. By controlling a suitable preoxidation temperature before severe thermolysis of polyvinylpyrrolidone (PVP), the MoO x /TiO 2 precursors formed a polymer-embedded array through coordination of the Mo source and pyrrolidyl groups of PVP. Sulfidation under water/solvent hydrothermal conditions led to partial formation of metallic 1T-phase MoS 2 from the MoO x precursor with preoxidation at 200 °C. After carbonization, the TiO 2 /MoO 3 /MoS 2 nanograins were encapsulated in a carbon backbone in a vertical pattern, providing both chemical contact for confined electron transport and sufficient space to adapt to volume changes. The obtained carbon-based platform not only has the advantages of an integral structure, but also exhibited ultrastable specific capacities of 540 and 251 mAh g −1 for Li-ion batteries and Na-ion batteries, respectively, after 100 cycles.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Qipeng Liu,Jing Wan,Yanrong Li,Huaiyu Ye,Xiangyu Han,Meihui Lai,Xiaoyu He,Xiao Gu,Chenguo Hu
Flexible lightweight supercapacitors are now actively investigated as one of the most promising power supplies for the portable and wearable electronics. Herein, radial nanowire arrays of Cu 0.7 Co 2.3 O 4 are grown on the carbon fiber for a flexible electrode by hydrothermal process and subsequent thermal annealing. The Cu 0.7 Co 2.3 O 4 electrode, with large exposure of low adsorption energy sites for Li ions due to the nanowires assembled by nanoparticles , displays superior electrochemical performance in 1 M LiCl aqueous solution and demonstrates areal capacitance of 340 mF cm −2 and 685Fg -1 at scan rate of 5 mV s −1 . The contribution of Faraday process and capacitive process are analyzed in detail. The density functional theory is employed to calculate the Li + ion adsorption energy and diffusion barrier , and the results indicate that Li ion can adsorb on 001 facet of the Co 2.3 Cu 0.7 O 4 easily and the Li ion diffusion barrier along 001 plane is as low as 0.16 eV. Furthermore, a flexible full solid-state supercapacitor is obtained by assembling two pieces of Co 2.3 Cu 0.7 O 4 electrode face to face, which presents good performance (112.5 mF cm −2 at 5 mV s −1 ), stability (74% after 5000 cycles), flexibility and wide operating voltage range. Three charged solid-state supercapacitors in series can light 48 green light emitting diodes for 150 s. The Cu 0.7 Co 2.3 O 4 electrode is expected to be a potential candidate for actual applications.
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Nano Energy
·
2019
·
IF 15.548
Rong Shao,Jin Niu,Feng Zhu,Meiling Dou,Zhengping Zhang,Feng Wang
In this work, we demonstrate an efficiency and versatile strategy for the synthesis of Si-based anodes using low-cost biomass and commercially available Si nanoparticles as precursors via conventional slurry coating and low-temperature pyrolysis . Due to the tailored and rational design, gelatin-derived carbon with numerous heteroatoms not only acts as a “conductive skeleton” to enhance the electron/ion transfer but also simultaneously accommodate the Si expansion and immobilize the Si on the current collector via “dual-interfacial bonding”. Without additional binder and conductive agents, the obtained Si-based anode exhibits high initial columbic efficiency (85.3%), high gravimetric capacity (3160 mAh g −1 at 0.2 A g −1 ), large areal capacity (2.81 mAh cm −2 at 0.18 mA cm −2 , approaching the commercial LIB requirement), good rate capability (1613 mAh g −1 at 5 A g −1 ) and cycling performance. Consequently, an assembled Li-ion capacitor utilizing the Si-based anode exhibits high energy density (213 Wh kg −1 ), high power density (22.3 kW kg −1 ), low discharge rate and long lifetime. The scalable synthetic method combined with high performance making this Si-based anode promising for practical applications.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 21
·18179-18186
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IF 2.324
Du Mengqi,Meng Yanshuang,Duan Chaoyu,Wang Chen,Zhu Fuliang,Zhang Yue
Nitrogen–sulfur co-doped porous carbon (NSPC) were prepared by using ionic liquids as both nitrogen and sulfur source. The as-obtained NSPC exhibits open pore structure with thin carbon walls and nitrogen (2.32 wt%) and sulfur (0.91 wt%) doping. When used as lithium-ion batteries (LIBs), NSPC shows a high reversible capacity of 821 mAh g −1 at 0.1 A g −1 after 50 cycles. Even after 1000 cycles, the NSPC exhibits a stable reversible capacity of 533 mAh g −1 at current density of 1.5 A g −1 . The excellent electrochemical performance of NSPC is attributed to two points: (1) interconnected three-dimensional pore structure; (2) Nitrogen and sulfur doping and the synergic effect of dual-doping heteroatoms. This work provides new ideas for the development of new anode materials for LIBs.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2017
·Vol. 23
·期 36
·8712-8718
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IF 5.317
Si-Yu Liu,Chao-Ying Fan,Han-Chi Wang,Jing-Ping Zhang,Xing-Long Wu
Graphical Anodes go bimetallic : On cycling of as-prepared 3D CoTiO 3 nanofibers, during the first lithiation process, along with the formation of a Li 2 O matrix, Ti IV and Co II species were converted/reduced to Li x TiO 2 nanoparticles (NPs) and metallic Co NPs, respectively, which suggested the electrochemical in situ formation of bimetallic transition-metal oxides (see figure). Bimetallic transition-metal oxides, which exhibit superior electrochemical properties compared with pristine single-metal oxides, have recently become a topic of significant research interest for applications in lithium-ion batteries (LIBs). Herein, we report a simple and scalable electrospinning method to synthesize porous CoTiO 3 nanofibers as the precursor for nanostructured bimetallic transition-metal oxides formed electrochemically in situ. This strategy ensures uniform mixing and perfect contact between two constituent transition-metal oxides during the lithiation/delithiation process. Furthermore, CoTiO 3 nanofibers based on ultrafine CoTiO 3 nanocrystals are interconnected to form a nano/microstructured 3D network, which ensures the high stability of the in situ formed structure composed of bimetallic transition-metal oxides, and also fast ion/electron transfer and electrolyte penetration into the electrode. Electrochemical measurements revealed the excellent lithium storage (647 mAh g −1 at 0.1 Ag −1 ) and retention properties (600 mAh g −1 at 1 Ag −1 after 1200 cycles) of the CoO/TiO 2 electrode. Moreover, the electrochemical reaction mechanism was explored by using ex situ X-ray photoelectric spectroscopy and cyclic voltammetry tests, which confirmed the two-phase reaction processes in the electrodes. These results clearly validate the potential of CoTiO 3 with a unique nano/microstructured morphology as the precursor for a bimetallic transition-metal oxide for use as the anode material for long-life LIBs.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Shengqi Ding,Liang Wu,Xianxia Yuan
Electrocatalysts with appropriate electron coupling toward LiO 2 intermediates can exhibit superior oxygen reduction/evolution reaction kinetics in Li-O 2 batteries (LOBs). In this work, a charge redistribution strategy has been developed by constructing NiS/MoS 2 heterostructure nanosheet self-assembled hollow microspheres with an internal electric field to regulate the interaction with LiO 2 and then improve the electrochemical performance of LOBs. Density functional theory calculations and physicochemical characterizations reveal that the difference of work functions between NiS and MoS 2 promotes the electron redistribution in heterointerface via built-in electrical field, leading to increased electron density of interfacial Ni atom, thereby enhancing its electron coupling toward LiO 2 intermediates and promoting one-electron oxygen reduction/oxidation reaction kinetics. As a result, the NiS/MoS 2 -based LOBs exhibit evidently higher discharge capacity and much better cycling performance than the batteries using NiS and MoS 2 . This work provides a reliable charge redistribution strategy induced by build-in electric field to design efficient catalysts for LOBs.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Huihui Gan,Liang Li,Pengyuan Qiu,Mingyu Cui,Jiajun Sun,Ye Xia,Wen Zhu
Layered Li-rich Mn-based oxide cathode materials (LRMO) have attracted extensive attention because of their high energy density. However, the poor cyclic stability, rate capability, and rapidly decay in voltage impede the practical application. Herein, a novel strategy for designing LRMO modified by silica-coated silver nanowires (AgNWs@SiO 2 ) is reported. The AgNWs@SiO 2 can provide the faster Li + diffusion kinetics, increase oxygen vacancy, and facilitate the heat dissipation in LRMO. As a result, the AgNWs@SiO 2 modified LRMO delivers a higher capacity retention of 71.6 % (after 500 cycles at 25 °C) and 58.5 % (after 200 cycles at 60 °C) at 1C than that of the untreated LRMO (65.2 % after 500 cycles at 25 °C and 37.8 % after 110 cycles at 60 °C). Meanwhile, the AgNWs@SiO 2 modified LRMO also possesses high-rate discharge specific capacity of 105.4 mAh g -1 at 10C and capacity retention of 50.6 % after 1000 cycles at 3C (the untreated LRMO only remains 19.3 % after 600 cycles at 3C). Furthermore, the AgNWs@SiO 2 modified LRMO also exhibits good electrochemical performance in the cell assembled with Si@C anode. This work provides a promising strategy for the possibility practical application toward next-generation high energy density lithium-ion batteries.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Shanshan Gao,Wenshuo Wang,Dayang Yu,Pengju Pan,Yongzhong Bao
All-solid-state lithium metal batteries (ASSLMBs) are considered as next-generation energy storage devices due to their high specific energy density and safety, and solid polymer electrolytes (SPEs) are an important component of ASSLMBs. Poly(ethylene oxide) (PEO) is the most prevalent matrix of SPE but is criticized for its poor mechanical properties and a narrow electrochemical stability window. To address this issue, poly(vinylidene fluoride)- b- poly(poly(ethylene glycol) methyl ether methacrylate (PVDF- b- PPEGMA) copolymer fibers with an ivy-like morphology were prepared by electrospinning and used to support PEO/lithium salt electrolytes. The electrospun PVDF- b- PPEGMA copolymer fiber membrane provides an uncial hierarchical structure with large pore size, good compatibility and adhesion with PEO due to side ethylene oxide units in the PPEGMA segment. The ivy-like fibers supported SPE exhibited good thermal stability and high mechanical strength. Furthermore, ASSLMBs assembled using the above SPE, LiFePO 4 cathode, and lithium metal anode possessed a wide electrochemical stable window (5.58 V vs. Li/Li + ) and good initial discharge capabilities at 60 °C.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tao Huanga,Lifeng Guan,Shuai Jin,Dehui Zhang,Wangwen Liao,Xiangyang Zhou,Xingxing Liu,Chen Wu,Wei Zeng
The low electrical conductivity of Li 3 V 2 (PO 4 ) 3 (LVP) impedes its practical application. To address this issue, this study enhances its conductivity by introducing nitrogen-doped carbon nanoframes into LVP. Using phytic acid as a carbon and phosphorus source, and polyvinylpyrrolidone (PVP) as a nitrogen source, nitrogen-doped nanoframe-modified LVP material (LVP@NC) was successfully synthesized. Importantly, the carbon nanoframes of LVP@NC are entirely derived from the precursor’s thermal decomposition, simplifying the synthesis process and reducing production costs. By optimizing the process parameters, significant improvements were achieved in key performance indicators, including the initial discharge capacity at 1C (132.85 mAh·g −1 ), long cycling life at 10C (98.98 % capacity retention after 1000 cycles), and rate capability at 50C (99.65 mAh·g −1 ). These improvements are attributed to the introduction of nitrogen-doped nanoframes, where the high-temperature decomposition of PVP leads to the formation of porous honeycomb-like structures, and nitrogen doping in the nanocarbon framework introduces defects and active sites, thereby promoting lithium-ion migration and facilitating electrolyte penetration. This simple, novel, and energy-efficient method demonstrates significant potential for the large-scale preparation of high-performance cathode materials.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lu Sai,Zhongsheng Dai,Zhenbo Wang,Huiling Zhao,Ying Bai
Li-rich layered oxides with high energy densities have become one kind of promising cathode for advanced lithium-ion batteries, however some issues are severely hindering their practical applications. To address these challenges, fast ion conductive LiTi 2 (PO 4 ) 3 (LTPO) is employed to modify the typical Li-rich cathode Li 1 · 2 Mn 0 · 56 Ni 0 · 17 Co 0 · 07 O 2 (LMNCO) via a sol-gel process combined with a two-step annealing treatment in this work. Serving as a physical separator, LTPO coating effectively depresses the side reactions at cathode-electrolyte interface and the transition-metal dissolution from LMNCO active material under harsh electrochemical environment. Meanwhile, LTPO layer with high ion conductivity could facilitate the interfacial Li + diffusion during charge/discharge process. In addition, partial Ti 4+ ions doped into LMNCO effectively elevate the oxygen electronegativity and restrain the excessive oxidization of lattice oxygen, thus stabilizing the crystal structure and alleviating the stress-strain propagation upon cycling. Electrochemical characterization results demonstrate that the LTPO-modified LMNCO cathode exhibits a superior capacity retention of 86.5 % after 400 cycles at room temperature and that of 73.7 % even under an elevated temperature of 45 °C after 250 cycles under 1C. This study provides a facile strategy for the surface modification of Li-rich layered-structure oxides, which also sheds light in enhancing electrochemical performances for various cathode materials .
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