Polyoxometalate-based metal-organic frameworks for boosting electrochemical capacitor performance

Chai, Dong-Feng; Gómez‐García, Carlos J.; Li, Bonan; Pang, Haijun; Ma, Huiyuan; Wang, Xinming; Tan, Lichao

doi:10.1016/j.cej.2019.05.084

Cited by 117 publications

(61 citation statements)

References 101 publications

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“…Extensive energy demands by portable electronics and electric vehicles have indorsed the rapid development of highly efficient energy storage technologies for human society . Electrochemical capacitors (ECs) have received significant attention as a strong candidate in virtue of high power density, fast charging rate, and long‐term cyclability . Since the performance metrics and energy storage mechanism of ECs depend on the electrode materials, extensive investigations have been performed to optimize the structure and electronic valence of inorganic materials to improve the energy density …”

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confidence: 99%

“…The Co‐Ni‐B‐S presents the highest capacitance with two pairs of redox peaks at the scan rate of 20 mV s −1 , whereas only one pair for the other materials (Co‐Ni MOF, Co‐Ni‐B, Co‐Ni‐S, and Co‐Ni‐S‐B) is resulted from the Co/Ni multivalences and amorphous structure after the redox treatment . The electrochemically active surface area (ECSA) of Co‐Ni MOF and its derivatives are also evaluated through the CV measurements at the potential window (0–0.1 V versus Hg/HgO) (Figure S10, Supporting Information) . The specific electrical double layer capacitance ( C dl ) of Co‐Ni MOF, Co‐Ni‐B, Co‐Ni‐B‐S, Co‐Ni‐S, and Co‐Ni‐S‐B is 110.66, 45.8, 145.4, 48, and 2.5 F g −1 , respectively.…”

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confidence: 99%

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Redox Tuning in Crystalline and Electronic Structure of Bimetal–Organic Frameworks Derived Cobalt/Nickel Boride/Sulfide for Boosted Faradaic Capacitance

et al. 2019

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The development of efficient electrode materials is a cutting‐edge approach for high‐performance energy storage devices. Herein, an effective chemical redox approach is reported for tuning the crystalline and electronic structures of bimetallic cobalt/nickel–organic frameworks (Co‐Ni MOFs) to boost faradaic redox reaction for high energy density. The as‐obtained cobalt/nickel boride/sulfide exhibits a high specific capacitance (1281 F g−1 at 1 A g−1), remarkable rate performance (802.9 F g−1 at 20 A g−1), and outstanding cycling stability (92.1% retention after 10 000 cycles). An energy storage device fabricated with a cobalt/nickel boride/sulfide electrode exhibits a high energy density of 50.0 Wh kg−1 at a power density of 857.7 W kg−1, and capacity retention of 87.7% (up to 5000 cycles at 12 A g−1). Such an effective redox approach realizes the systematic electronic tuning that activates the fast faradaic reactions of the metal species in cobalt/nickel boride/sulfide which may shed substantial light on inspiring MOFs and their derivatives for energy storage devices.

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confidence: 99%

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confidence: 99%

Redox Tuning in Crystalline and Electronic Structure of Bimetal–Organic Frameworks Derived Cobalt/Nickel Boride/Sulfide for Boosted Faradaic Capacitance

et al. 2019

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“…(III) The unique three-dimensional structures were formed by combining POMs and complexes, making three compounds insoluble and stable in aqueous solutions. (IV) POMs with Mo as metal atoms have higher oxidation capacity than those with W as Mo has better oxidation ability than W. [58] These results agree with the EIS, from which the rank of compounds' Rct was found to be 3 (20.7 Ω) < 1 (22.4 Ω) ( Table S3); showing that the 3-based electrode has the highest ionic conductivity and the fastest electron-transfer kinetics for redox reactions at the electrode interface.…”

Section: Selectivity and Sensitivity Of The As-prepared Sensormentioning

confidence: 97%

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

et al. 2021

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The development of POM‐based coordination polymers (CPs) provides a promising chance to approach excellent bifunctional electrode materials. Herein, three new polyoxometalates (POMs)‐based three‐dimensional (3D) inorganic‐organic hybrid compounds, [HPMVI9MV3O40]CuI5[4‐atrz]6⋅XH2O [M=Mo(1) or W(2), X=1(1)], [H2SiMoVI9MoV3O40]CuI5[4‐atrz]6⋅H2O (3) have been synthesized via hydrothermal reaction and explored as pseudocapacitive and sensors electrode materials. These compounds possess a novel three‐dimensional sandwich structure formed from POMs and ring CuI‐4‐atrz complexes by using Cu1 as nodes. As capacitor electrode materials, compounds 1 and 3 with Mo‐containing POMs show much higher specific capacitance than 2, which is because that POMs with Mo as metal atoms have much higher oxidation capacity than those with W. When these compounds are used as sensors to detect NO2− and Cr2O72−, compound 3 shows the highest sensitivity, lowest detection limit and most excellent anti‐interference ability. These results indicate that combining POMs and CuI‐4‐atrz complexes to form POM‐based coordination polymers with unique microstructures greatly improve the electrochemical performance and stability of traditional POMs as electrode materials, which are attributed to excellent redox properties of POMs, and unique three‐dimensional structure formed due to introduction of Cu‐4‐atrz complex. This work provides a promising direction for exploring novel bifunctional electrode materials.

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“…So far, reported copper‐organic compounds and their composites with SC properties can be divided into copper carboxylate MOFs ( 140 ‐ 157 ), copper polyoxometalate organic frameworks (Cu‐POMOFs, 158 ‐ 176 ), copper polyamine or polyphenol MOFs ( 177 ‐ 183 ), copper porphyrin compounds ( 184 ‐ 188 ), etc. Copper can exhibit electrochemical activity through the redox reaction between Cu(0), Cu(I), and Cu(II), and its organic compounds have been widely studied in SCs 73,77,78,80,116,159‐183 . Relevant conversion process can be expressed by the following equations 164,167,174 :

Cu {(normalI)}_{s} + {OH}^{-} \leftrightarrow Cu ((), I) {(OH)}_{ad} + e^{-},

Cu {(II)}_{s} + {OH}^{-} \leftrightarrow Cu ((), II) {(OH)}_{ad} + e^{-},

Cu ((), I) {(OH)}_{ad} \leftrightarrow Cu ((), II) {(OH)}_{ad} + e^{-},

Cu ((), II) {(OH)}_{ad} \leftrightarrow Cu ((), III) {(OH)}_{ad} + e^{-} .

…”

Section: Monometallic Metal‐organic Compounds and Their Compositesmentioning

confidence: 99%

“…Another important type of copper‐organic compounds is the POMOFs that has attracted recent research interests in the field of SC ( 158 ‐ 176 ) 28,38,77,169‐174 . POMOFs have many exceptional advantages for SC applications, such as long cycling life due to their poor solubility in water and in common inorganic and/or organic solvents, and crystalline forms which are suitable for investigating their effect on SC properties.…”

Section: Monometallic Metal‐organic Compounds and Their Compositesmentioning

confidence: 99%

Supercapacitor electrodes based on metal‐organic compounds from the first transition metal series

Chen

Xie

et al. 2021

EcoMat

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Metal‐organic compounds, including molecular complexes and coordination polymers, have attracted much attention as electrode materials in supercapacitors owing to their large surface area, high porosity, tailorable pore size, controllable structure, good electrochemical reversibility, and abundant active sites. Among the variety of metal‐organic compounds exhibiting desired supercapacitor performances (high specific capacitance, long cycling life, high energy density, and power density), those with metals in the first transition metal series are the most studied due to their rich covalent states, light atom weight, environmental‐friendliness, non‐toxicity, and low cost. In this review, the recent reports on the metal‐organic compounds of the first transition metal series as electrode materials in supercapacitors are summarized and their electrode and device performances are discussed in terms of different metal elements and typical multidentate ligands. Moreover, the current challenges, design strategies, future opportunities and further research directions are also highlighted for metal‐organic compounds in the field of supercapacitors.

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Polyoxometalate-based metal-organic frameworks for boosting electrochemical capacitor performance

Cited by 117 publications

References 101 publications

Redox Tuning in Crystalline and Electronic Structure of Bimetal–Organic Frameworks Derived Cobalt/Nickel Boride/Sulfide for Boosted Faradaic Capacitance

Redox Tuning in Crystalline and Electronic Structure of Bimetal–Organic Frameworks Derived Cobalt/Nickel Boride/Sulfide for Boosted Faradaic Capacitance

Preparation and Application of Keggin Polyoxometalate‐based 3D Coordination polymer Materials as Supercapacitors and Amperometric Sensors

Supercapacitor electrodes based on metal‐organic compounds from the first transition metal series

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