Polypyrrole‐Assisted Nitrogen Doping Strategy to Boost Vanadium Dioxide Performance for Wearable Nonpolarity Supercapacitor and Aqueous Zinc‐Ion Battery (Adv. Energy Mater. 41/2022)

Abstract

Aqueous Energy‐Storage Devices In article number 2201481, Chunlei Wang, Qichong Zhang, Qingwen Li, and co‐workers develop an in‐situ nitrogen doping strategy to fabricate nitrogen‐doped vanadium dioxide/nitrogen‐doped carbon heterostructures by pyrolyzation of the vanadium oxide/polypyrrole. The well‐designed fiber electrode delivers impressive electrochemical performance and extraordinary flexibility, both, in all‐solid‐state fiber‐shaped non‐polarity supercapacitors and aqueous zinc‐ion batteries.

Flexible Quasi‐Solid‐State Aqueous Zinc‐Ion Batteries: Design Principles, Functionalization Strategies, and Applications

“…N‐VO 2 nanosheets (NVNSs)@NC nanowires (NWs) heterostructure nanocomposites were prepared on CNTF using a three‐step process that included electrochemical polymerization, a solvothermal procedure, and post‐annealing established by Zhang group (Figure 2j). [ 57 ] With the fast ion transport and superb electronic conductivity of the binder‐free cathode, the fabricated NVNSs@NC@CNTF cathode delivered impressive electrochemical performance and extraordinary mechanical flexibility in FQAZIBs. Even though the direct growth of electrode active substances on soft current collectors possesses the advantage of without polymer binder, the successful acquires of this type of cathode are seriously limited by the varieties of electrode active substances and preparation approach.…”

Multiscale Dot‐Wire‐Sheet Heterostructured Nitrogen‐Doped Carbon Dots‐Ti3C2Tx/Silk Nanofibers for High‐Performance Fiber‐Shaped Supercapacitors

“…Among them, fiber‐shaped supercapacitors (FSCs) are an ideal candidate because of their light weight, [6] knittable, [7] excellent flexibility, [8] high power density [9] and stable cycle performances [10] . Based on the energy‐storage mechanism (electro‐sorption ions of electrical double‐layer capacitors [11] and the redox reactions of pseudocapacitors), [12] the micro‐building blocks of fibers with large ion accessible surface, porous pathways, electroactivity and electrical conductivity are highly important [13] . In this regard, diverse nanocarbon‐based (e.g., carbon nanotubes (CNT), [14] graphene [15] and activated carbon) [16] fibers, conductive material‐coated yarn, [17] and pseudocapacitive active material‐loaded metal wire [18] are constructed through dry spinning, [19] wet spinning, [20] hydrothermal self‐assembly, [21] microfluidic spinning, [22] chemical/electrochemical deposition [23] and 3D printing [24] processes.…”

A New (De)Intercalation MXene/Bi Cathode for Ultrastable Aqueous Zinc‐Ion Battery

“…[ 13–15 ] However, only a few known cathode materials have successfully shown good zinc ion storage capacity, such as Prussian blue analogues, manganese‐based oxides, vanadium‐based oxides, transition metal dichalcogenides, and organic materials. [ 16–22 ] In addition, the cycling sustainability of these cathode materials are still unsatisfactory, which limits the practical application of ZIBs. [ 2 ] Thus, the exploration of other suitable new cathode materials with superior cycling stability will help to promote the further development of ZIBs.…”