Controllable synthesis and electrochemical capacitor performance of MOF-derived MnO_x/N-doped carbon/MnO₂composites

Abstract

Different amount of carbon and nitrogen, for MOF-derived nitrogen-doped carbon/Mn3O4 composites, can result in the discrepancies of synergistic effect which plays an important role in final electrochemical performance.

Porous Cobalt Metal–Organic Frameworks as Active Elements in Battery–Supercapacitor Hybrid Devices

“…Recently, metal–organic frameworks (MOFs) have been demonstrated as active elements in energy-related devices, including rechargeable batteries, supercapacitors (SCs), and battery–SC hybrid (BSH) devices, owing to their charming features such as high surface area, controllable chemical composition, tailorable pore size and shape, and diverse functionalization. − Among all MOF materials, numerous three-dimensional (3D) porous MOF-based electrode materials, − such as MOF-5, HKUST-1, UIO-66, ZIF-8, and MIL-101, as well as MOF-derived inorganic electrode materials have been reported. − However, as electrodes in energy-related devices, their disadvantages, including instability during long-term cycling periods, low conductivity nature, and small pore size, are apparent. To overcome these adverse factors, several strategies have been adopted.…”

Super Flexible Cathode Material with 3D Cross‐Linking System Based on Polyvinyl Alcohol Hydrogel for Boosting Aqueous Zinc Ion Batteries

“…Among them, manganese‐based oxides are rich in valence and have excellent ion storage performance [18–19] . However, the dissolution of electrode materials and slow reaction kinetics of the conversion reaction seriously affect the cycle performance and rate performance of the electrode [20–24] …”

“…[18][19] However, the dissolution of electrode materials and slow reaction kinetics of the conversion reaction seriously affect the cycle performance and rate performance of the electrode. [20][21][22][23][24] Polyvinyl alcohol (PVA)-based hydrogel prepared under proper conditions is a polymer 3D network system that can maintain a certain shape. [25] The PVA hydrogel material has high mechanical strength, excellent elastic modulus and good ductility.…”

Ferrocene-Based Mixed-Valence Metal–Organic Framework as an Efficient and Stable Cathode for Lithium-Ion-Based Dual-Ion Battery

“…The lithium cations in LIBs move back and forth between the anode and cathode during charging and discharging process, − while the LDIBs relay on the commuting of both lithium cations and anions (i.e., PF 6 – and TFSI – ) from the electrolyte. , During charging and discharging process, the anions and lithium cations of the electrolyte are intercalated into the cathode and the anode, respectively, or deintercalated from the corresponding cathode/anode into the electrolyte; in other words, the electrolyte is an active material in LDIBs. ,, In the previous studies, graphite has been widely applied as the cathode in LDIBs . However, graphite always shows poor rate performance and low reversible capacity due to its limited space to storage anions. ,, In this regard, benefiting from their large molecular space, flexibility, and designability, organic materials are being considered as one of the ideal cathode candidates for hosting anions to achieve satisfactory electrochemical performance. − Thus, with the advantages of organic materials and to meet the requirements of high energy density, finding novel advanced anion-hosting cathode materials for LDIBs to obtain larger reversible capacity, higher operating voltage, and excellent rate performance is urgent and necessary.…”