Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

Ran, Feitian; Xu, Xueqing; Pan, Duo; Liu, Yuyan; Bai, Yongping

doi:10.1007/s40820-020-0382-x

Cited by 125 publications

(69 citation statements)

References 64 publications

(83 reference statements)

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“…[19,23] In the C1 sr egion (Figure 2d), two peaks appear at 284.6 and 288.1 eV can be assigned to the benzoic rings of terephthalica cid and O=CÀOg roups,r espectively,a nd the p-p*c onjugativee ffect of the terephthalic acid ligand is observed at 291.2 eV. [19] All the above-stated analyses demonstrate the successful transformation of MnNi- [13,14,17] According to Equation (1), the areas of CV curvesi sp roportionalt ot ested electrodes. Please notet hat the CV curve for Mn 0.1 -Ni-MOF/NF gains the largest area at the same scan rate, indicating its highest capacity.A lso note that the anodic and cathodic peaks shift towardt he positive and negative potential with increased scan rate, respectively,a scribed to the polarizatione ffect of electrode ( Figure 3b and Figure S5 a).…”

Section: Introductionmentioning

confidence: 78%

“…As an ew class of organic-inorganic hybrid supramolecular materials with uniquep eriodic porous structures, abundant open-pores and channels for accommodating electrolyte ions and uniform metal centers for redox reactions, metal-organic frameworks (MOFs) hold great promise for applications in both energy storagea nd conversion. [9][10][11][12][13][14] Unfortunately,m ost MOFs suffer from low electrical conductivity,r andomo rientations and lack of chemical stability for electrochemical applications. [15][16][17] Sacrificing MOFs as precursors and porous templates for desired target products preparation seems is an ideal solution and has been widely investigatedb efore, [15,18] which however is usually energy intensive and may do harm to both the living environmenta nd the periodic porous structures of MOFs.…”

Section: Introductionmentioning

confidence: 99%

“…As a new class of organic–inorganic hybrid supramolecular materials with unique periodic porous structures, abundant open‐pores and channels for accommodating electrolyte ions and uniform metal centers for redox reactions, metal–organic frameworks (MOFs) hold great promise for applications in both energy storage and conversion [9–14] . Unfortunately, most MOFs suffer from low electrical conductivity, random orientations and lack of chemical stability for electrochemical applications [15–17] .…”

Section: Introductionmentioning

confidence: 99%

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Ultrathin Mn Doped Ni‐MOF Nanosheet Array for Highly Capacitive and Stable Asymmetric Supercapacitor

Zheng

Wen

Sun

et al. 2020

Chemistry A European J

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In this study, we demonstrate that an Mn‐doped ultrathin Ni‐MOF nanosheet array on nickel foam (Mn0.1‐Ni‐MOF/NF) serves as a highly capacitive and stable supercapacitor positive electrode. The Mn0.1‐Ni‐MOF/NF shows an areal capacity of 6.48 C cm−2 (specific capacity C: 1178 C g−1) at 2 mA cm−2 in 6.0 m KOH, outperforming most reported MOF‐based materials. More importantly, it possesses excellent cycle stability to maintain 80.6 % capacity after 5000 cycles. An asymmetric supercapacitor device utilizing Mn0.1‐Ni‐MOF/NF as the positive electrode and activated carbon as the negative electrode attains a high energy density of 39.6 Wh kg−1 at 143.8 Wkg−1 power density with a capacitance retention of 83.6 % after 5000 cycles.

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Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrathin Mn Doped Ni‐MOF Nanosheet Array for Highly Capacitive and Stable Asymmetric Supercapacitor

Zheng

Wen

Sun

et al. 2020

Chemistry A European J

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“…Beside these two properties, adequate mechanical strength and low cost are also desired. Moreover, the use of sustainable membrane production protocols for optimizing the green benefits of advanced separation techniques is a key issue of the modern membrane industry [7,8].…”

Section: Introductionmentioning

confidence: 99%

Energy Harvesting from Brines by Reverse Electrodialysis Using Nafion Membranes

et al. 2020

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Ion exchange membranes (IEMs) have consolidated applications in energy conversion and storage systems, like fuel cells and battery separators. Moreover, in the perspective to address the global need for non-carbon-based and renewable energies, salinity-gradient power (SGP) harvesting by reverse electrodialysis (RED) is attracting significant interest in recent years. In particular, brine solutions produced in desalination plants can be used as concentrated streams in a SGP-RED stack, providing a smart solution to the problem of brine disposal. Although Nafion is probably the most prominent commercial cation exchange membrane for electrochemical applications, no study has investigated yet its potential in RED. In this work, Nafion 117 and Nafion 115 membranes were tested for NaCl and NaCl + MgCl2 solutions, in order to measure the gross power density extracted under high salinity gradient and to evaluate the effect of Mg2+ (the most abundant divalent cation in natural feeds) on the efficiency in energy conversion. Moreover, performance of commercial CMX (Neosepta) and Fuji-CEM 80050 (Fujifilm) cation exchange membranes, already widely applied for RED applications, were used as a benchmark for Nafion membranes. In addition, complementary characterization (i.e., electrochemical impedance and membrane potential test) was carried out on the membranes with the aim to evaluate the predominance of electrochemical properties in different aqueous solutions. In all tests, Nafion 117 exhibited superior performance when 0.5/4.0 M NaCl fed through 500 µm-thick compartments at a linear velocity 1.5 cm·s−1. However, the gross power density of 1.38 W·m−2 detected in the case of pure NaCl solutions decreased to 1.08 W·m−2 in the presence of magnesium chloride. In particular, the presence of magnesium resulted in a drastic effect on the electrochemical properties of Fuji-CEM-80050, while the impact on other membranes investigated was less severe.

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“…Polymer composites with substantially improved thermal conductivity ( k ) [ 1 , 2 , 3 ] and dielectric permittivity ( ε ) [ 4 ] are in great need for many applications, such as thermal interface materials [ 5 , 6 ], heat dissipation and thermal management [ 7 , 8 , 9 ], microelectronics, and energy storage related applications [ 4 , 10 , 11 , 12 ]. Appropriate fillers with inherent high performance are essential for preparing these desired functional polymer composites.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Improved Thermal and Dielectric Performance of Epoxy Composites Containing Ti3C2Tx Platelet Fillers

et al. 2020

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Polymer composites with enhanced thermal and dielectric properties can be widely used in electric and energy related applications. In this work, epoxy composites have been prepared with Ti3C2Tx, one of the most studied MXene materials that can be massively produced by direct etching using hydrofluoric acid. The addition of conductive two dimensional Ti3C2Tx platelet fillers leads to improved but anisotropic thermal conductivity of the composites. The through-plane thermal conductivity reaches 0.583 Wm−1K−1 and the in-plane thermal conductivity reaches 1.29 Wm−1K−1 when filler content is 40 wt% (21.3 vol%), achieving enhancements of 2.92 times and 10.65 times respectively, as compared with epoxy matrix. The dielectric permittivity of epoxy composite is enhanced by a factor of ~2.25 with 40 wt% fillers, and the dielectric losses are within a small value of 0.02. The results prove the effectiveness of Ti3C2Tx in simultaneously improving thermal and dielectric performance of epoxy composites, and it is deduced that further improvements may be obtained by using Ti3C2Tx nanoflake fillers.

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Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

Cited by 125 publications

References 64 publications

Ultrathin Mn Doped Ni‐MOF Nanosheet Array for Highly Capacitive and Stable Asymmetric Supercapacitor

Ultrathin Mn Doped Ni‐MOF Nanosheet Array for Highly Capacitive and Stable Asymmetric Supercapacitor

Energy Harvesting from Brines by Reverse Electrodialysis Using Nafion Membranes

Simultaneously Improved Thermal and Dielectric Performance of Epoxy Composites Containing Ti3C2Tx Platelet Fillers

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