A Polymer/Graphene Composite Cathode with Active Carbonyls and Secondary Amine Moieties for High‐Performance Aqueous Zn‐Organic Batteries Involving Dual‐Ion Mechanism

Abstract

Aqueous zinc‐ion batteries (AZIBs) are regarded as one of the most promising alternative technology to lithium‐ion batteries on account of their low flammability and cost‐benefits. Among various cathode materials in AZIBs, environment‐friendly and sustainable organic electrode materials stand out owing to their structural diversity and tunability. However, their limited rate capability and cycle stability remain the obstacles to their further application in AZIBs. Herein, a mixed cathode design strategy including polymerization and carbon materials hybridization is adopted to assemble high‐rate and durable AZIBs. Specifically, a polymer/graphene composite cathode with active carbonyls and secondary amine moieties is prepared to construct high‐performance aqueous Zn‐organic batteries. Furthermore, a hybrid energy storage mechanism involving dual‐ion mechanism is confirmed by various ex situ characterization techniques, providing promising battery chemistry. Thus, this work opens up a new path to high performance AZIBs through a rational cathode design.

A Multifunctional Anti-Proton Electrolyte for High-Rate and Super-Stable Aqueous Zn-Vanadium Oxide Battery

“…Rechargeable aqueous zinc-ion batteries (AZIBs) are supposed to be the potential next-generation candidate benefited from the low cost, intrinsic safety and high theoretical capacity, which have received extensive attention in the recent years [1][2][3]. To develop high-rate and long shelf-life AZIBs, many kinds of cathode materials have been successively demonstrated, which mainly includes the manganese-based oxides [4][5][6][7], vanadium-based compounds [8,9], Prussian blue analogues (PBAs) [10,11] and organic materials [12]. Among them, vanadium oxides (such as V 2 O 5 , VO 2 , V 2 O 3 ) are considered as the promising storage host due to the abundant valence state to achieve high specific capacity, and open-frameworks assembled by various coordination polyhedral to facilitate the efficient ion storage during the electrochemical cycling [13,14].…”

High Discharge Capacity and Ultra-Fast-Charging Sodium Dual-Ion Battery Based on Insoluble Organic Polymer Anode and Concentrated Electrolyte

“…Organic materials are regarded as promising anode candidates in terms of their wide source, cost effectiveness, flexible designability, high theoretical capacity, easy recycling, and no metal elements. − Specifically, organic carbonyl compounds are fascinating to investigate for their facile synthetic routes, unique multi-electron reactions, and high theoretical capacities. , Unfortunately, small-molecule carbonyl compounds are unstable in organic solvents and prone to severe dissolution. , Additionally, the inherent unfavorable conductivity makes it difficult to achieve fast transport and reaction kinetics . Consequently, they display unsatisfactory cycling and rate performance, which limits their application in large-scale energy storage systems.…”

Graphene and Polyethyleneimine Bilayer Wrapping onto Quinone Molecular Crystal Cathode Materials for Aqueous Zinc-Ion Batteries

“…Usually, graphene wrapping on ROMs is performed using relatively weak π–π interaction. − Therefore, similar to inorganic materials for graphene wrapping, the use of strong Coulombic interaction is required to improve cyclability. In the general graphene wrapping process using Coulombic interaction, the core material is dispersed in a graphene oxide (GO) dispersion to facilitate adsorption, followed by the reduction of GO, where the core material and GO have positive and negative zeta potentials, respectively.…”