Journal of Energy Storage
·
2023
·
IF 9.4
Yanan Teng,Huan Liu,Qi Wang,Yan He,YongChang Hua,Chunping Li,Jie Bai
Garnet type Li 7 La 3 Zr 2 O 12 solid electrolyte exhibits excellent thermal stability and high ionic conductivity, which is an ideal solid electrolyte. However, it is found that the cubic phase is a high conductivity phase and the synthesis condition is harsh. Therefore, low temperature synthesis and partial element substitution are expected to prepare cubic phase LLZO. In this paper, the LLZO cubic phase structure is stabilized by electrospinning technology and high-priced cation substitution strategy, and the transportation efficiency of lithium ions is improved. The experimental results show that LLZO NFs inorganic filler with stable cubic phase structure is obtained when the molar amount of In 3+ is 0.2. The In 3+ with large ion radius replaces the Li + inside the crystal, effectively increases the lithium vacancy concentration, and increases the Li + transport path inside the crystal, and successfully doubles the ionic conductivity of the composite solid electrolyte at 60 °C (9.39 × 10 −4 S/cm). The lithium ions migration number and electrochemical window were increased to 0.19 and 5.2 V respectively. With excellent cycle performance (60 °C), it can cycle 2000 cycles at a high rate of 0.5 C charge and discharge, and the Coulomb efficiency has been close to 100 %. Li|PL-LILZO NFs (0.2)|LFP all-solid-state lithium batteries can light small bulbs at room temperature and have practical application prospects. Therefore, in the composite electrolyte, the increase of the lithium ions pathway inside the active inorganic filler crystal will also improve the comprehensive performance of the composite electrolyte for preparation.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-12
·
IF 4.996
Zhu Xinhe,Fu Jingguo,Ma Dengqing,Ma Chunsheng,Fu Yunyang,Zhang Zhuokai
A composite ceramic coating containing h-BN particles was prepared on the ZL109 alloy via plasma electrolytic oxidation. The h-BN particles were modified by Polyethylene glycol to improve the dispersibility. The results revealed that the h-BN particles in the electrolyte were inertly incorporated into the coating. Meanwhile, the incorporation of h-BN particles can reduce the porosity and slightly increase the roughness of the composite ceramic coating. Furthermore, the growth rate of the coating and the conversion of γ-Al 2 O 3 and α-Al 2 O 3 were promoted by the incorporation of h-BN particles via the change of the current. In addition, due to the presence of h-BN particles, the composite ceramic coating had a lower friction coefficient and a lower wear rate under dry sliding condition.
研究领域:
材料科学
·
表面工程
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高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 5
·1538-1547
·
IF 6.367
Ruyan Lei,Yanping Yang,Chenjuan Yu,Yinsi Xu,Yuanzhuo Li,Jun Li
In order to improve the electrochemical performance and efficiently prepare a solid polymer electrolyte (SPE) for the lithium-metal battery (LMB), a fumed SiO2 (FS) with surface Si–OH group was used to fabricate FS-modified poly(ethylene oxide) (PEO)–LiClO4-based SPE by a facile preparation process. The influences of the FS content on the morphological properties, thermal properties, lithium salt dissociation, mechanical properties, and electrochemical properties of SPE were systematically analyzed. Results indicate that FS with the hydrophilic property was widely distributed throughout the amorphous phase of SPE, thus the crystallinity of SPE was reduced to 25.83% when the FS mass loading was 6.85 wt%. In addition, a greater dissociation degree of lithium salt was achieved after the addition of FS, and a higher ion conductivity of 3.03 × 10−4 S cm−1 and Li-ion migration number of 0.396 were recorded at 60 °C. The all-solid-state Li/SPE/Li coin cell showed excellent stable cyclability (380 h) and the LiFePO4 (LFP)/SPE/Li coin cell demonstrated good discharge specific capacity and coulomb efficiency of 96 mA h g−1 and 100.2%, respectively, after 100 cycles of galvanostatic charge–discharge operation under 0.5C at 60 °C. Thus, based on collective results, it is expected that SPE presented in this work is a promising electrolyte for next-generation high-energy all-solid-state LMB with enhanced safety.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态离子学
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高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Yue Zhang,Wenda Bao,Haoyuan Li,Lianqi Zhao,Beili Yi,Haojie Zhao,Yuqing Zuo,Longxing Su,Xincan Cai,Lingyu Liu,Jin Xie
Solid-state lithium-metal batteries with composite polymer electrolytes are promising for next-generation energy-storage devices. Typical synthesis strategies of preparing inorganic-polymer composite mainly focused on physical mixing of inorganic fillers with polymer or surface coating of inorganic thin films on polymer, which are hard to suppress Li-dendrite penetration. Here, we demonstrate the bulk and interface properties of powdery poly (ethylene oxide) can be modified simultaneously with highly dispersed alumina using a vapor phase infiltration (VPI) approach. The chemically synthesized alumina with under-coordinated aluminum sites shows strong interaction with PEO, and therefore highly dispersed in the polymer matrix as well as on the surface of the polymer. On the lithium metal anode side, it reduces the interfacial resistance and allows Li|Li symmetric battery to cycle more than 1400 h under 0.2 mAh/cm 2 . On the cathode side, it increases the electrochemical stability window of PEO up to 4.25V without compromising the charge transfer kinetics. The result shows the promise of using VPI as a facile one-step method to tune the properties of the polymer on a large scale for battery applications.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Fanyou Zeng,Yuanyuan Sun,Bin Hui,Yanzhi Xia,Yihui Zou,Xiaoli Zhang,Dongjiang Yang
The rational design and optimization of solid polymer electrolytes (SPEs) are critical for the application of safety and high efficiency lithium ion batteries (LIBs). Herein, we synthesized a novel poly(ethylene oxide) (PEO)-based SPE (PEO@AF SPE) with a cross-linking network by the introduction of alginate fiber (AF) membranes. Depending on the high-strength supporting AF skeleton and the cross-linking network formed by hydrogen bonds between the PEO matrix and AF skeleton, the obtained PEO@AF SPE exhibits an excellent tensile strength of 3.71 MPa, favorable heat resistance (close to 120 °C), and wide electrochemical stability window (5.2 V vs Li/Li+). Meanwhile, the abundant oxygen-containing groups in alginate macromolecular and the three-dimensional (3D) porous structure of the AF membrane can greatly increase Li+ anchor points and provide more Li+ migration pathways, leading to the enhancement of Li+ conduction and interfacial stability between the SPE and Li anode. Furthermore, the assembled LiFePO4/PEO@AF SPE/Li cells also exhibit satisfactory electrochemical performance. These results reveal that PEO incorporating with AFs can boost the mechanical strength, thermostability, and electrochemical properties of the SPE simultaneously. Furthermore, one will expect that the newly designed PEO@AF SPE with cross-linked networks thus provides the possibility for future applications of safety and high-performance LIBs.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Dong Han,Zongchen Zhao,Wei Wang,Huanlei Wang,Jing Shi,Lili Zheng
Solid polymer electrolytes (SPEs) have attracted much attention because of their potential in improving energy density and safety. Vanadium doped ceramic matrix Li 6.7 La 3 Zr 1.7 V 0.3 O 12 (LLZVO) was synthesized by high-temperature annealing, and formed a composite electrolyte with polyethylene oxide (PEO). Compared with pure PEO electrolyte membrane, the composite electrolyte membrane exhibited better ionic conductivity (30 °C: 3.2 × 10 −5 S cm −1 ; 80 °C: 3.6 × 10 −3 S cm −1 ). The combination of LLZVO was beneficial to improve the lithium ion transference number (t Li + ) of SPE, which was as high as 0.81. The Li/SPE/LiFePO 4 battery shows good cycling ability, with a specific capacity of 142 mAh g −1 after a stable cycle of 150 cycles. Meanwhile, the symmetrical lithium battery with composite electrolyte can work continuously for 1200 h without short circuit at the current density of 0.1 mA cm −2 at 50 °C, and the capacity is 0.176 mAh. Vanadium doped ceramic matrix LLZVO as an active ionic conductor , improved the overall performance of solid electrolyte.
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DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Xiao Chen,Yinda Li,Yunhao Lu,Jian Xie,Cheng Huang,Xiongwen Xu,Jian Tu,Xinbing Zhao,Tiejun Zhu
LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) is considered as a promising cathode for high-energy-density solid-sate Li metal battery for its high theoretical capacity. However, the high oxidizability and structural instability during charge limit its practical applications. In this work, 1% (in mass) of nanosized Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) was coated on NCM811 to enhance its electrochemical stability with a ceramic/polymer composite electrolyte. A robust, ultrathin (11 μm) composite electrolyte film was prepared by combining poly(vinylidene fluoride) (PVDF) with polyethylene oxide (PEO)-Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZTO). An in-situ polymerization process was used to enhance the interface between the PVDF/PEO-LLZTO (PPL) composite electrolyte and the LATP-coated NCM811 (LATP-NCM811). Coin-type Li|LATP-NCM811 cell with the PPL electrolyte exhibits stable cycling with an 81% capacity retention after 100 cycles at 0.5 C. Pouch-type cell was also fabricated, which can be stably cycled for 70 cycles at 0.5 C/1.0 C (80% retention), and withstand abuse tests of bending, cutting and nail penetration. This work provides an applicable method to fabricate solid-state Li metal batteries with high performance.
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高影响因子
Materials
·
2021
·Vol. 14
·期 18
·5380
·
IF 3.623
Haichang Zhang,Zhibin Xu,Bin Shi,Fei Ding,Xingjiang Liu,Hongzhao Wu,Chunsheng Shi,Naiqin Zhao
Cr8O21can be used as the cathode material in all-solid-state batteries with high energy density due to its high reversible specific capacity and high potential plateau. However, the strong oxidation of Cr8O21leads to poor compatibility with polymer-based solid electrolytes. Herein, to improve the cycle performance of the battery, Al2O3atomic layer deposition (ALD) coating is applied on Cr8O21cathodes to modify the interface between the electrode and the electrolyte. X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, and Fourier transform infrared spectroscopy, etc., are used to estimate the morphology of the ALD coating and the interface reaction mechanism. The electrochemical properties of the Cr8O21cathodes are investigated. The results show that the uniform and dense Al2O3layer not only prevents the polyethylene oxide from oxidization but also enhances the lithium-ion transport. The 12-ALD-cycle-coated electrode with approximately 4 nm Al2O3layer displays the optimal cycling performance, which delivers a high capacity of 260 mAh g−1for the 125th cycle at 0.1C with a discharge-specific energy of 630 Wh kg−1.Keywords:Cr8O21cathode material;atomic layer deposition;all-solid-state lithium-ion batteries;Al2O3coating
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Zewen Lu,Jingbo Mu,Chaowen Guan,Shufeng Zhao,Tianshuo Sui,Shimin Liao,Zengcai Guo
There has been extensive research on conductive hydrogels, however, the current lack of practical applications is a significant issue. The crucial challenge lies in effectively integrating conductive hydrogels into practical use. Here, a uniform multifunctional hydrogel was facilely fabricated by integrating nitrogen-doped carbon capsules (N-Cc) and g-C 3 N 4 to PEO/PVA hydrogels (VECGNC). The introduction of a double network structure through carbon material endows the VECGNC hydrogel with exceptional mechanical strength (stress: 47.2 kPa; strain: 318 %) and high electrical conductivity (0.025 S cm −1 ). And it showed a good linear relationship between the temperature and pressure difference. Taking advantage of these properties, a logic gate circuit capable of sensing external pressure changes and effecting corresponding adjustments was constructed. Moreover, the strain sensitivity hydrogel designed in this work is capable of intelligent new traffic lights. Our work offers novel insights and methodologies for the utilization of multifunctional hydrogels in multi-scenario temperature and strains ensing applications.
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Yang Li,Chunting Guo,Caixia Qi,Dejian Zhang,Huilai Sun,Shuyan Yang,Yong Wan,Yanshuang Wang
Although the formation of plasma electrolytic oxidation (PEO) coatings on aluminum alloys can significantly enhance their service life, they may still suffer from corrosion damage when exposed to harsh environments with strong corrosivity for a long time. In this work, chitosan (CS) was dissolved in four acids, i.e. hydrochloric acid (HCl), citric acid (CA), lactic acid (LA), and acetic acid (HAc), and deposited onto the PEO-coated 5052 aluminum alloy using dip coating method. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS), atomic force microscope (AFM), contact angle (CA) meter, grazing incidence X-ray diffraction (GIXRD), Fourier transform infrared spectrometer (FTIR), and electrochemical workstation system were used to explore the enhancement of the corrosion resistance of PEO-coated 5052 aluminum alloy by application of CS film prepared in different solvent acids. The results showed that the interactions between chitosan and acid ions affects the uniformity, hydrophobicity , thickness and surface roughness of the CS/PEO coating. The HAc-CS/PEO coating had the lowest surface roughness of 32.4 ± 3.9 nm, the largest contact angle of 85.7 ± 2.0°, and the thickest CS film of 20 μm, which significantly improved corrosion resistance of PEO-coated aluminum alloy.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 50
·期 6
·1216-1225
·
IF 3.919
You-Cui Xu,Chang-Ming Dong
Dendron-like poly(ε-benzyloxycarbonyl- L -lysine)/linear poly(ethylene oxide) block copolymers (i.e., Dm-PZLys- b -PEO, m = 0 and 3; Dm are the propargyl focal point poly(amido amine) dendrons having 2 m primary amine groups) were for the first time synthesized by combining ring-opening polymerization (ROP) of ε-benzyloxycarbonyl- L -lysine N -carboxyanhydride (Z-Lys-NCA) and click chemistry, where Dm-PZLys homopolypeptides were click conjugated with azide-terminated PEO. Their molecular structures and physical properties were characterized in detail by FTIR, 1 H NMR, gel permeation chromatography, differential scanning calorimetry, polarized optical microscopy, and wide angle X-ray diffraction. Both homopolypeptides and copolymers presented a liquid crystalline phase transition for PZLys block, and the transition was irreversible. Moreover, the degree of crystallinity of PEO block within linear copolymers decreased from 96.2% to 20.4% with increasing PZLys composition, whereas that within dendritic copolymers decreased to zero. The secondary conformation of PZLys progressively changed from β-sheet to α-helix with increasing the chain length. These copolymers self-assembled into spherical nanoparticles in aqueous solution, and the anticancer drug doxorubicin-loaded nanoparticles gave a similar morphology compared with their blank counterparts. The drug-loaded nanoparticles showed a triphasic drug-release profile at aqueous pH 7.4 or 5.5 and 37 °C and sustained a longer drug-release period for about 2 months. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 37
·e55941
·
IF 2.7
Zhitao Yang,Zhen Zhang,Cheng Li,Yiping Fang,Yong Liu,Qingfeng Yi
Since the advent of all-solid-state lithium-ion batteries (ASSLIBs), they have been widely regarded as the ideal high-temperature-resistant energy storage devices. The solid-state electrolyte, a crucial component, should possess high ionic conductivity, excellent flexibility, and significant mechanical strength. Poly(ethylene oxide)-based all-solid-state polymer electrolytes (PEO-ASSPE) appear to meet these criteria. However, PEO-ASSPE exhibits poor stability at elevated temperatures, where localized overheating and internal thermal runaway can lead to battery short-circuit failure. To address these issues, this study employs a ethylene-methacrylic acid copolymer (EMAA) as a structural support polymer, blended via a eccentric rotor mixer. The homogeneously dispersed EMAA within the PEO matrix forms an interpenetrating network structure and interacts with other components, significantly enhancing the high-temperature electrochemical stability of the composite polymer electrolytes (CPEs) while maintaining ionic conductivity. Research has demonstrated that when the EMAA content is 40 wt.%, the resulting CPE-40EMAA exhibit high ionic conductivity (4.07 × 10 −4 S cm −1 ), a high lithium-ion transference number (0.564), a broad electrochemical stability window (5.1 V), and excellent high-temperature lithium metal cycling stability (stable cycling for 800 h at current density of 0.1 mA cm −2 ), which sufficiently meets the electrochemical performance requirements for ASSPEs in high-temperature energy storage batteries.
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高影响因子
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