ACS Applied Energy Materials
·
2025
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IF 5.5
Yulong Liu,Huanyan Xu,Tianci Wang,Minghua Chen
The liquid electrolytes (LEs) in traditional lithium batteries present safety concerns. Solid polymer electrolytes (SPEs) have garnered increasing attention due to their nonvolatility, ease of processing, excellent mechanical properties, and stability. However, the performance of PEO-based solid-state batteries is often constrained by low ionic conductivity and poor mechanical strength. Therefore, we fabricated a nanofiber scaffold (PAN@UiO66) using electrospinning technology and then cast a solution containing zirconia (ZrO2) fillers and bis(trifluoromethane)sulfonimide (LiTFSI), dispersed in poly(ethylene oxide) (PEO), onto the electrospun PAN@UiO66 scaffold to obtain a composite solid polymer electrolyte (CSPE, PZ/PAN@UiO66). The synergistic effect of the PAN@UiO66 scaffold and zirconia creates an amorphous-enriched region in the CSPE, providing uniform and abundant Lewis acid–base interaction sites, which reduce the crystallinity of the PEO-based solid electrolyte and enhance the diffusion and migration of lithium ions within the polymer. The components were physically characterized and electrochemically tested by using Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and energy-dispersive spectroscopy (EDS). The results indicate that the incorporation of PAN@UiO66 optimizes the lithium-ion transport behavior of PEO-based solid electrolytes and enhances their cycling stability. Specifically, at 60 °C, the lithium-ion transference number of the PAN@UiO66 nanofiber-enhanced composite solid polymer electrolyte (CSPE) increased from 0.20 to 0.40, the electrochemical voltage window expanded from 4.58 to 5.10 V, and the Li||Li symmetrical cell assembled with CSPE exhibited stable plating and stripping for over 670 h at a current density of 0.1 mA cm–2. The assembled LFP||Li coin cell delivered an initial discharge capacity of 149.81 mAh g–1 at 0.5C, with a capacity retention of 101.53% after 200 cycles. The LFP||Li pouch cell assembled with CSPE exhibited a discharge capacity of 113.21 mAh g–1 at 0.5C and stable cycling for 100 cycles, demonstrating the commercial potential of the composite solid-state electrolyte.
研究领域:
材料科学
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电化学
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储能技术
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聚合物纳米复合材料
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锂电池
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产品关联
DOI
高影响因子
Nanoscale
·
2025
·Vol. 17
·期 28
·16936-16945
·
IF 5.1
Liyun Ding,Zelin Gao,Botao Zhang,Baoquan Xiao,Li Yang,Dekui Zhang,Siyu Chen,Linzhu Gou,Tuanjie Che,Xiaoling Zheng
Nitric oxide (NO) is extensively involved in many physiological and pathological processes in biological systems and is of great significance in chemical and biomedical applications. Herein, a novel optical fiber NO sensor based on the carbon quantum dots (CDs)@UiO66 complex was prepared, in which CDs@UiO66 was encapsulated within cellulose acetate (CA) as a fluorescence probe to form the NO-sensitive film coated on the optical fiber end-face through a dip-coating method. The fluorescence properties and morphology of the CDs@UiO66 complex and its sensitive film were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), fluorescence spectroscopy, and contact angle tests. The fluorescence intensity response of the optical fiber sensor in detecting micromolar and nanomolar levels of NO was also investigated and showed a good linear dependence, while the lower limit of detection for NO reached 5 nM. Compared with other sensors, this new NO optical fiber sensor is simple to fabricate, is cost-effective, and has better selectivity, making it a potential candidate for NO detection.
研究领域:
生物医学工程
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分析化学
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分子传感
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纳米生物技术
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转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
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IF 5.383
Li Ma,Ying He,Youran Wang,Yuhua Wang,Ruotong Li,Zhihong Huang,Yanjun Jiang,Jing Gao
Pt nanoparticle-anchored zirconium-based metal organic framework nanocomposites (Pt@UiO66-NH 2 ) with large surface areas and highly dispersed Pt nanoparticles were synthesized and applied to prepare acetylcholinesterase (AChE) biosensors for organophosphorus pesticides (OPs) detection. Because of integrative impact of excellent electron conduction channels and the increasing of adsorption sites of Pt@UiO66-NH 2 as well as the ultrahigh surface area to increase AChE immobilization, the prepared biosensors exhibited high sensitivity towards malathion (as a model for OPs), malathion was detected ranging from 1 × 10 −14 M to 1 × 10 −9 M and 4.9 × 10 −15 M was regarded as limit of detection. The biosensors also displayed accurately. Moreover, the Pt@UiO66-NH 2 /GCE was used to detect OPs in cabbage and apple samples. This study manifests the profound potential of metal nanoparticle/MOF composites for biosensors with improved electrochemical performance.
研究领域:
生物传感
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环境科学
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农业科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Peng Wei,Yang Sui,Dong Huang,Bensheng Zhu,Xiaoyu Meng,Qiong Zhou
Sulfonated poly ether ether ketone (SPEEK) was used to fabricate proton exchange membrane (PEM) due to its adaptable proton conductivity. However, PEM cannot simultaneously enhance its conductivity and stability. To solve the problem mentioned above, phosphotungstic acid (HPW) with strong inherent proton conductivity was chosen to add to the SPEEK matrix, but it still faces the leaky problem. NH 2 -UiO-66 (NU6) with a large surface area and chemical stability was synthesized in situ on the surface of polyimide (PI) nanofiber to create NU6@PI nanofiber, which can be used to anchor HPW. Meanwhile, the stability of proton transport channel may be further enhanced by the sandwich structure, which may be advantageous for proton transport. The NU6@PI/SPEEK + HPW-20 exhibited a conductivity of 174.9 mS·cm −1 and a swelling ratio of 19 % at 60 °C and 100 % RH. After 6 weeks of testing, its conductivity decreased to 151.2 mS·cm −1 which was 24 % higher than that of SPEEK, while the swelling ratio increased to 31 % which was lower than that of SPEEK. The outcome demonstrates that the sandwich-structure NU6@PI/SPEEK + HPW membrane may really boost proton conductivity and stability at the same time. By using XPS and TEM, it is possible to confirm the acid-base interaction and acid-rich layer that exist at the interfaces of NU6@PI nanofiber and HPW/SPEEK matrix. After 6-weeks of usage, the sandwich-structure composite membrane with nanofiber at both the top and bottom of PEM can still maintain high proton conductivity and high stability, offering a novel research idea for resolving the issue that PEM cannot simultaneously achieve significant proton conductivity as well as elevated stability.
研究领域:
材料科学
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化学工程
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2026
·
IF 14
Xinyi Chen,Jie Fei,Xinyu Ke,Zhaoxi Gou,Lehua Qi,Hejun Li
Carbon fabric (CF)-reinforced polymer composites show great potential in wet friction applications, but their performance is severely limited by poor interfacial adhesion and susceptibility to abrasive wear. Herein, we propose a “rigid-flexible” hierarchical interface strategy utilizing a conformal defect-filling carboxymethyl cellulose (CMC) layer and an in-situ grown rigid UiO66-NH 2 octahedral array to enhance the mechanical and tribological properties of CF/phenolic composites. The CMC/UiO66-NH2 hierarchical modification reduced surface defects and increased the apparent single-fiber tensile strength by 89.3%. Meanwhile, the UiO66-NH 2 array increased the surface roughness and promoted mechanical interlocking with the resin matrix. The combined CMC/UiO66-NH 2 interface improved interfacial load transfer and reduced premature debonding, leading to a 75.1% increase in tensile strength. Furthermore, under alternating friction shear, the hierarchical interface promotes the formation of a protective tribofilm, promoting the in-situ formation of a continuous solid tribofilm. This transitions the wear mechanism from severe abrasive wear to mild sliding wear, resulting in an 81.1% reduction in the specific wear rate. This study provides an interfacial design strategy for designing high-load-bearing and highly durable fabric composites for demanding tribological applications.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xuebi Du,Shichao Feng,Jianquan Luo,Yongbing Zhuang,Weijie Song,Xuewei Li,Yinhua Wan
Amine-functionalized and metal doped metal–organic frameworks (MOFs) will enable further enhancement of CO 2 adsorption, which holds great promise in mixed matrix membranes (MMMs) for CO 2 /N 2 separation. Four kinds of UiO66 with different sizes have been successfully fabricated by introduction of Ce and/or amino groups in UiO66. The influence of Ce doping on the UiO66 is greatly related to the ligand. Compared with ZrUiO66, the CeZrUiO66 has bigger particle size, lower BET specific surface area and pore volume and a worse CO 2 adsorption capacity. Interestingly, the tendency of Ce-doped ZrUiO66-NH 2 is contrary to the aforementioned. In particular, bimetallic CeZrUiO66-NH 2 has an ultramicroporous structure, small particle size, rich crystal defect, superb CO 2 capture capacity and high CO 2 /N 2 adsorption selectivity, suggesting that the simultaneous introduction of Ce and amino groups is conducive to the enhancement of CO 2 separation. The intrinsic ultramicroporous structure of CeZrUiO66-NH 2 not only offers fast and low resistance transport channels for CO 2 , but also supplies more sites for CO 2 adsorption owning to the doping of Ce and the amino groups. As a result, Pebax/CeZrUiO66-NH 2 (3 wt%) MMMs show the CO 2 permeability of 100.7 Barrer and the CO 2 /N 2 ideal selectivity of 76.4, which is close to Robeson upper bound from 2008. Meanwhile, the Pebax/CeZrUiO66-NH 2 (3 wt%) MMMs present relatively good pressure resistance, which would be advantageous in terms of industrial application.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Interdisciplinary Materials
·
2024
·
IF 24.5
Yi Liu,Tianyi Hou,Wei Zhang,Bin Gou,Faqiang Li,Haonan Wang,Xin Deng,Dinggen Li,Henghui Xu,Yunhui Huang
Commercial polyolefin separators in lithium batteries encounter issues of uncontrolled lithium-dendrite growth and safety incidents due to their low Li + transference numbers ( t Li + ${t}_{{\mathrm{Li}}^{+}}$ ) and low melting points. To address these challenges, this study proposes an innovative approach by upgrading conventional separators through the incorporation of metal-organic framework (MOF)-confined polyoxometalate (POM). The presence of POM restricts anion diffusion through electrostatic repulsion while facilitating Li + transport within MOF nanochannels through their affinity for lithium ions. Moreover, MOF confinement effectively mitigates the acidification of electrolytes induced by POM. As a proof-of-concept, the polypropylene separators decorated with phosphotungstic acid@UIO66 (denoted as PW 12 @UIO66-PP) exhibit remarkable lithium-ion conductivity of 0.78 mS cm −1 with a high t Li + ${t}_{{\mathrm{Li}}^{+}}$ of 0.75 at room temperature. The modified separators also display excellent thermal stability, preventing significant shrinkage even at 150°C. Furthermore, Li symmetric cells employing PW 12 @UIO66-PP separators exhibit stable cycling for 1000 h, benefiting from rapid Li-ion transport and uniform deposition. Additionally, the modified separator shows promising adaptability to industrial manufacturing of lithium-ion batteries, as evidenced by the assembly of a 4 Ah NCM811/graphite pouch cell that retains 97% capacity after 350 cycles at C/3, thus highlighting its potential for practical applications.
研究领域:
材料科学
·
电化学
·
电池技术
·
纳米技术
✓ 已验证
DOI
高影响因子
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