ADVANCED MATERIALS
·
2024
·Vol. 36
·期 30
·2403202
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IF 27.4
Ming Chen,Taizheng Wu,Liang Niu,Ting Ye,Wenlei Dai,Liang Zeng,Alexei A. Kornyshev,Zhenxiang Wang,Zhou Liu,Guang Feng
Conductive metal–organic frameworks (c-MOFs) and ionic liquids (ILs) have emerged as auspicious combinations for high-performance supercapacitors. However, the nanoconfinement from c-MOFs and high viscosity of ILs slow down the charging process. This hindrance can, however, be resolved by adding solvent. Here, constant-potential molecular simulations are performed to scrutinize the solvent impact on charge storage and charging dynamics of MOF-IL-based supercapacitors. Conditions for >100% enhancement in capacity and ≈6 times increase in charging speed are found. These improvements are confirmed by synthesizing near-ideal c-MOFs and developing multiscale models linking molecular simulations to electrochemical measurements. Fundamentally, the findings elucidate that the solvent acts as an “ionophobic agent” to induce a substantial enhancement in charge storage, and as an “ion traffic police” to eliminate convoluted counterion and co-ion motion paths and create two distinct ion transport highways to accelerate charging dynamics. This work paves the way for the optimal design of MOF supercapacitors.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 7
·2101908
·
IF 6.389
Meng Miao,Zhipeng Wang,Zhiming Guo,Jinfeng Xing
A quasi solid–liquid reaction strategy is proposed that is based on the instantaneous transformation of structured solid ligand aggregation into insoluble Cu 3 (HITP) 2 metal–organic framework (MOF) aggregation without morphologic change (HITP = 2,3,6,7,10,11-hexaiminotriphenylene). The initial 3D ordered submicron macropores (TOM) in ligand aggregation can be maintained during the transformation due to the extremely rapid rate of coordination reaction. In this case, the in situ synthesis of the Cu 3 (HITP) 2 MOF film with large-scale TOM structure (TOM-Cu 3 (HITP) 2 film) on ceramic-based gold interdigital electrode (IDE) is achieved. Scanning electron microscope is used to confirm the morphology in each stage of synthetic process. Spectroscopic characterizations prove that there is no essential difference between TOM-Cu 3 (HITP) 2 film and ordinary Cu 3 (HITP) 2 MOF, except for slight differences in the contents of individual surface functional group and integral crystallinities, respectively. Notably, TOM structure endows the TOM-Cu 3 (HITP) 2 film with a dramatic promotion in sensitivity to H 2 S gas. The resistive response of the IDE loaded with TOM-Cu 3 (HITP) 2 film to the 80 ppm H 2 S gas reaches 78.5 at room temperature, which is 6.7× more than that of the Cu 3 (HITP) 2 film without TOM structure. The method of obvious universality allows the authors to perform in situ synthesis directly on the desired substrate without transfer process.
研究领域:
材料科学
·
化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Hongmei Dai,Yue Xu,Yongchao Han,Shixiong Sun,Xiaolin Zhang,Fangyu Xiong,Chao Huang,Chun Fang,Jiantao Han,Paul K. Chu
Superior specific capacity, high-rate capability, and long-term cycling stability are essential to anode materials in sodium-ion batteries, and conductive metal–organic frameworks (cMOF) with good electronic and ionic conductivity may satisfy these requirements. Herein, conductive neodymium cMOF (Nd-cMOF) produced in situ on the zeolitic imidazolate framework (ZIF)-derived carbon fiber (ZIF-CFs) platform is used to synthesize the Nd-cMOF/ZIF-CFs hierarchical structure. Four types of ZIFs with different pore diameters are prepared by electrospinning. In this novel structure, ZIF-CFs provide the electroconductivity, flexible porous structure, and mechanical stability, while Nd-cMOF provides the interfacial kinetic activity, electroconductivity, ample space, and volume buffer, consequently giving rise to robust structural integrity and excellent conductivity. The sodium-ion battery composed of the Nd-cMOF/ZIF-10-CFs anode has outstanding stability and electrochemical properties, such as a specific capacity of 480.5 mAh g–1 at 0.05 A g–1 as well as capacity retention of 84% after 500 cycles.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Hu Qin,Qin Jie,Wang Xiao-Feng,Ran Guang-Ying,Wang Qiang,Liu Guang-Xiang,Ma Jian-Ping,Ge Jing-Yuan,Wang Hai-Ying
A non-enzymatic electrochemical sensor for glucose detection is executed by using a conductive metal–organic framework (MOF) Cu-MOF, which is built from the 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) ligand and copper acetate by hydrothermal reaction. The Cu-MOF demonstrates superior electrocatalytic activity for glucose oxidation under alkaline pH conditions. As an excellent non-enzymatic sensor, the Cu-MOF grown on Cu foam (Cu-MOF/CF) displays an ultra-low detection limit of 0.076 μM through a wide concentration range (0.001–0.95 mM) and a strong sensitivity of 30,030 mA μM−1 cm−2. Overall, the Cu-MOF/CF exhibits a low detection limit, high selectivity, excellent stability, fast response time, and good practical application feasibility for glucose detection and can promote the development of MOF materials in the field of electrochemical sensors.
研究领域:
材料科学
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电化学传感器
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
Long Zhang,Lifan Nie,Shaohui Zhang,Zhaobo Dong,Quan Zhou,Ziang Zhang,Ge-Bo Pan
High permittivity nanocomposites have recently received extensive attention for their potential applications in energy storage and flexible electronics. In this paper, 2D conductive MOF Ni 3 (HHTP) 2 was modified onto the MXene nanosheets for fabricating high permittivity poly (vinylidene fluoride) (PVDF) nancomposites with low dielectric loss. The SEM, TEM and XRD results confirm the Ni 3 (HHTP) 2 MOF was grafted on MXene nanosheets successfully. The MOF-MXene/PVDF nanocomposite exhibits a high permittivity of 530 with dielectric loss of 0.49 at 4.76 wt% under 1 kHz.
研究领域:
材料科学
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能源存储
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
npj Flexible Electronics
·
2025
·Vol. 9
·期 1
·1-11
·
IF 15.5
Liu Kai,Xu Yifan,Tian Xiaozhu,Liang Junxuan,Zhao Zhihui,Wang Jun,Zhang Ziqi,Zhang Kewei,Yang Song
Aiming at the poor selectivity of electrically conductive metal-organic framework (EC-MOF) chemoresistive materials, this study develops a breakthrough room temperature ammonia (NH 3 ) sensor by stacking ionically conductive MOF (IC-MOF) on an environmentally friendly biofabric. The synergism between ionic conductivity, tailored metal-nitrogen interaction, and fabric porosity enables the sensor with high response ( R 0 / R g = 14.7 towards 1 ppm NH 3 ), low detection limit (36 ppb), and remarkable selectivity (coefficient >5.12 against common organic interferents). Notably, the optimized sensor yields a sixfold enhancement in response as compared with traditional EC-MOF powders. A linear regression model validated by fivefold cross-validation achieves 98.4% accuracy in NH 3 concentration prediction, while the kNN classifier shows 96% accuracy in gas identification (tested on 192 samples). Preliminary clinical tests show that the sensor can clearly differentiate the exhaled NH 3 signals of four patients with HE from those of healthy individuals, demonstrating the potential for non-invasive diagnostics.
研究领域:
传感器与生物传感器
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材料科学
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纳米技术
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医学诊断
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分析化学
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呼吸系统疾病
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可穿戴电子器件
✓ 已验证
产品关联
DOI
高影响因子
Carbon Energy
·
2025
·
IF 24.2
Jiangchang Chen,Chuntao Yang,Yao Dong,Ya Han,Yingjian Yu
Rechargeable Zn/Sn-air batteries have received considerable attention as promising energy storage devices. However, the electrochemical performance of these batteries is significantly constrained by the sluggish electrocatalytic reaction kinetics at the cathode. The integration of light energy into Zn/Sn-air batteries is a promising strategy for enhancing their performance. However, the photothermal and photoelectric effects generate heat in the battery under prolonged solar irradiation, leading to air cathode instability. This paper presents the first design and synthesis of Ni 2 -1,5-diamino-4,8-dihydroxyanthraquinone (Ni 2 DDA), an electronically conductive π-d conjugated metal–organic framework (MOF). Ni 2 DDA exhibits both photoelectric and photothermal effects, with an optical band gap of ~1.14 eV. Under illumination, Ni 2 DDA achieves excellent oxygen evolution reaction performance (with an overpotential of 245 mV vs. reversible hydrogen electrode at 10 mA cm −2 ) and photothermal stability. These properties result from the synergy between the photoelectric and photothermal effects of Ni 2 DDA. Upon integration into Zn/Sn-air batteries, Ni 2 DDA ensures excellent cycling stability under light and exhibits remarkable performance in high-temperature environments up to 80°C. This study experimentally confirms the stable operation of photo-assisted Zn/Sn-air batteries under high-temperature conditions for the first time and provides novel insights into the application of electronically conductive MOFs in photoelectrocatalysis and photothermal catalysis.
研究领域:
储能
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材料科学
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电化学
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光电催化
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光热催化
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金属-有机框架（MOFs）
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）