In-situ Co-precipitated α-MnO2@2-methylimidazole cathode material for high performance zinc ion batteries

Structural Engineering of Vanadium Oxide Cathodes by Mn2+ Preintercalation for High-Performance Aqueous Zinc-Ion Batteries

“…A series of cathode materials are tailored for ZIBs, such as tunnel-type manganese-based oxides, layered vanadium-based oxides with intercalation reactions, transition-metal sulfur compounds, and Prussian blue analogues. 4,7,8 Among them, VO 2 is composed of distorted VO 6 octahedra and has a typical open tunnel structure, which is conducive to the intercalation/deintercalation of Zn 2+ ions. 9,10 Meanwhile, VO 2 provides a high theoretical capacity of 646 mA h g −1 based on the twoelectron redox reaction.…”

“…Until now, tremendous efforts have been devoted to improving the electrochemical performance of ZIBs. A series of cathode materials are tailored for ZIBs, such as tunnel-type manganese-based oxides, layered vanadium-based oxides with intercalation reactions, transition-metal sulfur compounds, and Prussian blue analogues. ,, Among them, VO 2 is composed of distorted VO 6 octahedra and has a typical open tunnel structure, which is conducive to the intercalation/deintercalation of Zn 2+ ions. , Meanwhile, VO 2 provides a high theoretical capacity of 646 mA h g –1 based on the two-electron redox reaction . However, the strong electrostatic interaction between the divalent Zn 2+ and VO 2 cathode often generates structural deterioration, producing irreversible phase transition to decline rate performance during the repeated intercalation/deintercalation process. − Meanwhile, the slow desolvation ability of Zn 2+ ions also leads to side reactions and the generation of irreversible specific capacity. ,, Therefore, there are still specific challenges in designing vanadium-based cathode materials with excellent electrochemical performance.…”

Study on Electrochemical Performance of MnO@rGO/Carbon Fabric-Based Wearable Supercapacitors

“…Among all the metal oxides, manganese oxides (e.g., MnO, MnO 2 , and Mn 3 O 4 ) exhibit excellent electrochemical activity owing to their broad potential window [ 21 , 22 ]. Compared to the widely reported MnO 2 [ 23 , 24 , 25 ], manganese monoxide (MnO) has received less research attention, but has been one of the most promising active materials for electrochemical capacitors due to a high theoretical specific capacitance of ~1350 F g −1 , which is larger than that of MnO 2 (1110 F g −1 ) [ 26 , 27 ]. Moreover, it possesses low cost and natural abundance and is environmentally friendly [ 28 , 29 , 30 ].…”

Oxygen Vacancies Enhance H+ Diffusion Kinetics for a Flexible and Lightweight Aqueous Zinc/Manganese Monoxide Battery

“…In recent years, due to the rapid development of intelligent wearable devices, it is urgent to develop advanced flexible energy storage facilities. − AZMBs have attracted increasing attention in applications of large-scale energy storage and wearable electronics due to their high safety, modest price, nontoxicity, and acceptable rate performance. − Currently, the majority of reports on AZMBs have focused on cathode materials, including those based on Mn − and V, − Prussian blue derivatives, , etc. Among them, MnO 2 is the most valuable cathode for research because of its high theoretical capacity, considerable output voltage, and abundant Mn resources. ,, Nevertheless, the further application of manganese dioxide is limited by its unsatisfactory conductivity, poor stability of the cyclic structure, and slow diffusion kinetics of Zn 2+ . − …”