Organic-conjugated polyanthraquinonylimide cathodes for rechargeable magnesium batteries

Abstract

Rechargeable Mg batteries (RMBs) are advantageous for large-scale energy storage because of the abundant reserves and high safety, but inorganic cathodes suffer from few species, low capacities and sluggish Mg2+...

Organic Nanosheets of Imide-Linked Cathodes for High-Performance Aqueous Zinc-Ion Batteries

“…The full survey spectrum in Figure 5a V. 56 All of the changes suggest the reversible insertion/ extraction of Zn cations into C�O units during cycling, further indicating the storage mechanism of C�O groups in the NI-DAQ electrode. 36,45 Electrochemical Characterization of NI-DAQ for LIBs. The electrochemical performance of the NI-DAQ cathode in LIBs with the organic electrolyte was also developed to declare the universality of the material.…”

Advances in organic cathode materials for aqueous multivalent metal-ion storage

“…More recently, incorporating small redox molecules into insoluble polymer networks has become an effective solution to relieve the intrinsic dissolution concern of organic cathode materials. 9,54,[56][57][58] Xu's group synthesized polyanthraquinonylimide cathodes consisting of electrochemically active anthraquinone and imide units (Fig. 5b).…”

“…5b). 57 According to the mechanism study, the redox process was assigned to carbonyl enolization, and the large conjugated network provided a simpler means for electrons to get delocalized and enhanced the reversible capabilities. The polyanthraquinonylimide cathode was demonstrated to store Mg 2+ rather than MgCl + based on carbonyl enolization, finally delivering outstanding power output (2780 W kg À1 ).…”

“…Copyright 2019, Elsevier). (b) Structures, FTIR spectra, XRD patterns and SEM images of polyanthraquinonylimide cathode materials (reproduced with permission 57. Copyright 2022, Royal Society of Chemistry).…”

Poly(2,6-anthraquinonyl disulfide) as a high-capacity and high-power cathode for rechargeable magnesium batteries: extra capacity provided by the disulfide group

“…[5][6][7][8][9][10] The exible polymer chains break the limit of the inorganic crystal lattice for Mg 2+ diffusion, and the conjugated structure facilitates negative charge delocalization to weaken the interaction with Mg 2+ cations. 11 On the other hand, the open structure of the conjugated polymers provides quite a few Mg-storage sites and increases the theoretical capacity. Hence, the structural features of the conjugated polymers would improve the Mg-storage performance both in thermodynamics and kinetics.…”