Quinone‐Amine Polymer Nanoparticles Prepared through Facile Precipitation Polymerization as Ultrafast and Ultralong Cycle Life Cathode Materials for Lithium‐Ion Batteries

Abstract

Polymer electrode materials are often poorly soluble in liquid organic electrolytes of lithium-ion batteries, yet they suffer from issues of severe agglomeration and complicated synthesis processes, which hinder their practical applications. Herein, spherical cross-linked quinone-amine polymer nanoparticles (denoted as PQANPs) are synthesized through a facile precipitation polymerization, which can effectively address the agglomeration problems of polymer electrode materials. The cross-linking degrees of polymers and diameters of PQANPs can be facilely tuned by adjusting the feed ratios of p-benzoquinone to 3,3′-diaminobenzidine. The optimized PQANP demonstrates excellent electrochemical performance with an ultrafast rate capability of 25 A g −1 and an ultralong cycle life of 20 000 cycles, which exceed all benzoquinone-based polymer electrode materials reported in the literature. The findings offer an efficient and convenient strategy for high-performance nanostructured polymer electrode materials.

Green and Scalable Template‐Free Strategy to Fabricate Honeycomb‐Like Interconnected Porous Micro‐Sized Layered Sb for High‐Performance Potassium Storage

“…As shown in Figure 4g, the calculation value of b is 0.6 for porous-Sb and 0.55 for raw-Sb anodes implying that porous-Sb delivered a stronger pseudo-capacitive contribution. [47,48] Additionally, the contribution of pseudo-capacitive contribution was calculated using the following equation:…”

Bis-imidazole ring-containing bipolar organic small molecule cathodes for high-voltage and ultrastable lithium-ion batteries

“…[7][8][9] Compared with traditional inorganic electrode materials, organic electrode materials have the advantages of high theoretical specic capacity, good structural designability, low environmental footprint, etc. 10,11 Encouragingly, recent years have witnessed the vigorous development of a large number of organic materials as LIB cathodes involving multiple redoxactive functional groups, such as carbonyl (C]O), pyrazine/ imine (C]N) groups, cyano groups (C^N), azo (N]N), 7,[12][13][14][15] and so on. Practically, in a considerable range of redox-active organic molecules, carbonyl-based compounds, like cyclohexanone, 16 p-benzoquinone, 17 and 9,10-anthraquinone, 17 have signicant advantages as cathode materials for LIBs, due to their widespread presence in nature, high specic capacity, and outstanding redox activity.…”

A furan-based organic cathode material for high-performance sodium ion batteries

“…15 Amine groups have also been proposed to enhance the stability of cross-linked polymer electrodes by forming intramolecular/intermolecular hydrogen bonds. 16 3. Expanding the p-conjugation system through C]C, C^C, C-S-C or aryl rings such as benzene, anthraquinone, naphthalene or polycyclic aromatic hydrocarbons.…”