| 1. |
- Zhang, Keliang, et al.
(författare)
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Rational design and kinetics study of flexible sodium-ion full batteries based on binder-free composite film electrodes
- 2019
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Ingår i: Journal of Materials Chemistry A. - : Royal Society of Chemistry. - 2050-7488 .- 2050-7496. ; 7:16, s. 9890-9902
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Tidskriftsartikel (refereegranskat)abstract
- A high-performance flexible sodium-ion full battery (FSIFB) is developed by using binder-free composite film (BFCF) electrodes without using conductive carbon and current collectors. Hard carbon fibers decorated with different electrochemical active materials are used as the supporting framework and 3D conductive network of FSIFBs for the first time. Different pre-sodiated anodes and the electrolyte additives are designed for well-matched FSIFBs. Using a porous Na3V2(PO4)(3) coated hard carbon fiber film with a mass loading of 2.34 mg cm(-2) as the cathode and a pre-sodiated graphene/SiC/hard carbon fiber film with a mass loading of 1.50 mg cm(-2) as the anode, an optimized FSIFB is designed. It delivers high output voltage (3.34 V), high energy density (234.1 W h kg(-1) at a high-current rate of 0.5 A g(-1)), ultralong cyclability (over 2905 cycles at 0.5 A g(-1) and 1000 cycles at 5 A g(-1)), and high coulombic efficiency (approaching 100%), which surpasses those of all FSIFBs reported so far. Furthermore, this FSIFB still maintains good electrochemical attributes even at serious bending states in water. The models of the solid electrolyte interphase behavior on the surface of electrodes in the FSIFB are studied by using EIS, and a reaction mechanism and an equivalent electrical circuit are proposed. We also provide the videos of the preparation process for a pouch-type FSIFB to demonstrate its simple operability and potential applications.
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| 2. |
- Zhang, Xudong, et al.
(författare)
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C-60/Na4FeO3/Li3V2(PO4)(3)/soft carbon quaternary hybrid superstructure for high-performance battery-supercapacitor hybrid devices
- 2020
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Ingår i: NPG ASIA MATERIALS. - : NATURE PUBLISHING GROUP. - 1884-4049 .- 1884-4057. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- To develop battery-supercapacitor hybrid devices with high energy and power densities, we propose a rational design of a quaternary hybrid superstructure by using a high-energy biotemplate. This new superstructure is composed of stable fullerene C-60 nanocages, electroactive Na4FeO3, high-energy Li3V2(PO4)(3) and soft carbon as well as tubular ordered mesoporous channels. This design takes advantage of the unique properties of each component, resulting in nanocomposites with synergistic effects to improve the charge transfer and energy storage. We found that this quaternary hybrid electrode has both high energy and power densities as well as a long cycling life in a Li/Na mixed-ion electrolyte, outperforming a multitude of other battery-supercapacitor hybrid devices reported thus far. The charge storage mechanisms of this hybrid superstructure are proposed for optimizing the electrode design.
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| 3. |
- Luo, Guogang, et al.
(författare)
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ERK1/2 pathway involved in the expression of ETB receptors of the culturing smooth muscle cells of rat mesenteric artery
- 2006
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Ingår i: Yao Xue Xue Bao. - 0513-4870. ; 41:3, s. 257-262
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Tidskriftsartikel (refereegranskat)abstract
- AIM: To determine the involvement of extracellular signal-regulated kinase 1/2 (ERK1/2) pathway in the expression of endothelin receptor type B (ETB) during culture. METHODS: SB386023, a specific inhibitor for ERK1/2 pathway, was used to define the intracellular signaling pathway for the upregulation of ETB receptors and sarafotoxin 6c (S6c), a selective agonist for ETB receptors, induced contraction in isolated rat superior mesenteric arteries. The contraction was recorded by a sensitive in vitro myograph and the receptor mRNA was quantified by a real-time PCR. The phosphorylated ERK1/2 proteins were analyzed by phosphoELISA assay. RESULTS: S6c induced strong contractile responses of the artery after culture for 24 h, while there was no response to S6c in fresh vessel segments. The enhanced contractile response to S6c paralleled with an increase of mRNA for ETB receptors. The phosphorylated ERK1/2 proteins significantly increased after culture for 3 h. After co-culture with SB386023 for 24 h, S6c-induced contractions significantly decreased with reduction of Emax from (217 +/- 14) % to (127 +/- 23) % (P <0.01). This response paralleled with a decreased level of ETB receptor mRNA. CONCLUSION: ERK1/2 pathway was involved in the up-regulation of ETB receptors on smooth muscle cells isolated from rat mesenteric arteries during culture.
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| 5. |
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| 6. |
- Zhang, Xudong, et al.
(författare)
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Binary superlattice ceramic membrane-coated soft carbon/hard carbon microspheres for high energy mixed-ion batteries
- 2019
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Ingår i: Journal of Power Sources. - : ELSEVIER. - 0378-7753 .- 1873-2755. ; 438
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Tidskriftsartikel (refereegranskat)abstract
- The assembly of two different materials into a composite with binary superlattices can provide a most efficient and inexpensive path to the synthesis of electrode materials with high energy density. Here, Li9Fe3P8O29/Na2HPO4 binary superlattice ceramic membrane-coated mesoporous soft carbon/hard carbon microspheres (BSLCM-MSC/HCMs) are synthesized via a hydrothermal carbonization method using acyl nucleoside triphosphate disodium salt (Na(2)ATP) as a multifunctional template. Here Na(2)ATP is not only a phosphorus source, a sodium source and a nucleating agent for the rapid synthesis of BSLCM, but also is a carbon source which is easily transformed into MSC/HCMs after being heat-treated in a N-2 atmosphere. This special structure design brings a remarkable synergic effect for both Li+/Na+ mixed-ion storage and transfer kinetics. As a new nanocomposite cathode for mixed-ion batteries (MIBs), the BSLCM-MSC/HCMs display a self-enhancement of discharge capacity via electrolyte penetration in the core-shell mesoporous microspheres. Importantly, the discharge specific energy of a MIB assembled with the BSLCM-MSC/HCMs-2 cathode is up to 400 W h kg(-1) at a high current rate of 10C, which outperforms all lithium-ion batteries and sodium-ion batteries reported so far. The findings in this study may benefit to the development of high energy mixed-ion batteries.
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| 7. |
- Zhao, Beibei, et al.
(författare)
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NaSn2(PO4)(3) submicro-particles for high performance Na/Li mixed-ion battery anodes
- 2020
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Ingår i: Journal of Alloys and Compounds. - : ELSEVIER SCIENCE SA. - 0925-8388 .- 1873-4669. ; 844
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Tidskriftsartikel (refereegranskat)abstract
- NaSn2(PO4)(3) has open framework, high ionic conductivity, low working potential, high theoretical capacity more than twice of graphite. However, its commercial application is limited by its low electrical conductivity and rapid capacity fading. To overcome this challenge, we synthesize NaSn2(PO4)(3) submicro-particles (around 100-300 nm in size) by hydrothermally assisted pyrolysis reactions. The synthesized NaSn2(PO4)(3) anode for Na/Li mixed-ion batteries delivers an ultrahigh initial discharge capacities, excellent rate performance and superior cycling stability. This design provides a promising pathway for developing high performance mixed-ion batteries. (C) 2020 Elsevier B.V. All rights reserved.
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