Crystalline-Amorphous Hybrid CoNiO₂ Nanowires with Enhanced Capacity and Energy Density for Aqueous Zinc-Ion Hybrid Supercapacitors

Abstract

Reasonable regulation of crystal structures plays an important role in improving cathode materials for energy storage devices. A good crystal structure is beneficial to charge transfer in the electrode, while introduction of an amorphous phase is helpful to expose more active sites, which makes adaptation to the structural strain in the process of high current charging and discharging easier. Therefore, we have grown crystalline-amorphous hybrid CoNiO2 nanowires on nickel foam by a simple solvothermal method, which proves that it is an effective cathode material for zinc-ion hybrid supercapacitors with enhanced specific capacity, good rate property, and outstanding energy density. This unique hybrid structure not only provides a direction for the crystal structure design of electrode materials but also greatly promotes the development of next-generation energy storage devices.

Formulation of Hierarchical Nanowire-Structured CoNiO2 and MoS2/CoNiO2 Hybrid Composite Electrodes for Supercapacitor Applications

“…Also, the duos at 859.2 and 877.3 eV are credited to Ni 3+ 2p 3/2 and 2p 1/2 states, respectively. It is imperative to highlight that the observed high binding energy peak duos can emerge from the nickel (hydro)­oxide. , Figure c displays the O 1s profile, which defines the characteristic oxide- and defective oxide-related peaks from the CoNiO 2 phase. , …”

Implementation of High-Capacity 3D Ti3C2TX MXene Supercapacitors with Terminal Group Modification

“…As people carry around more and more wearable electronic devices, the requirement for flexible energy storage materials is gradually increasing. Supercapacitors have the advantages of rechargeable batteries, and traditional capacitors, compared to other secondary batteries, have faster charging and discharging capabilities, stronger stability, and higher power density. − Especially, flexible supercapacitors play a crucial role in the field of wearable electronic devices due to their high stability and flexibility. , Traditional flexible supercapacitors are fabricated on flexible substrates, such as poly­(dimethylsiloxane) (PDMS), polyimide (PI), carbon cloth, and other flexible substrates. This not only increases the overall gravimetric of the device and reduces the gravimetric specific capacity of the device but also risks the active substances falling off during the movement.…”

“…1−3 Especially, flexible supercapacitors play a crucial role in the field of wearable electronic devices due to their high stability and flexibility. 4,5 Traditional flexible supercapacitors are fabricated on flexible substrates, such as poly-(dimethylsiloxane) (PDMS), 6 polyimide (PI), 7 carbon cloth, 8 and other flexible substrates. This not only increases the overall gravimetric of the device and reduces the gravimetric specific capacity of the device but also risks the active substances falling off during the movement.…”

Synthesis and characterization of reversible thermosensitive methylated chitin and its application in zinc‐ion battery thermal runaway

“…[17][18][19] Among this batteries, aqueous zinc-ion batteries have particularly attracted numerous attention because of their high capacity, low redox potential, and environmental friendliness. 20 But they also bring many security problems that cannot be ignored. 21 These batteries can generate a lot of heat in a short period of time during rapid charging and discharging, and local high temperatures can easily cause fires or even explosions.…”

“…With the rapid development of the electric vehicles, smart grid energy storage devices and personal electronics, the demand for batteries with high‐energy‐density is gradually increasing 17–19 . Among this batteries, aqueous zinc‐ion batteries have particularly attracted numerous attention because of their high capacity, low redox potential, and environmental friendliness 20 . But they also bring many security problems that cannot be ignored 21 .…”