Tetraphenylbiphenyldiamine: Insight into anion storage mechanism as a cathode in dual ion batteries

Incorporation of Azo-Linkage to Elevate the Redox Potential of Triphenylamine-Based Porous Organic Polymer Cathodes for Li-Ion Batteries

“…The energy storage mechanism followed the typical anion doping process as reported previously for p-type organic electrode materials , and chemical structure modification during the charge–discharge processes, as shown in Figure . To establish the CN + bond with the C atom of the phenyl group during the charge process, the TPA group of Azo-POPs loses the electrons around the N atoms, and PF 6 – gets absorbed around the CN + bond to provide a balancing charge.…”

A D–A type polymer as an organic cathode material for sodium-based dual-ion batteries with 3.0 V output voltage

“…When a Pz-based organic material was used as the cathode, the tertiary amine will lose an electron and be oxidized to N-radical cations, before storing anions. 40 Usually, the first oxidized active site corresponds to the first redox peak, and the subsequent sites correspond to the second redox peak. The chemical environment of the active site affects the sequence of reactions at the two sites.…”

“…When charged from 1.5 to 4.3 V, the peak almost disappeared and the peak of the C]N + bond appeared at 1652 cm −1 , indicating that the tertiary amine group was oxidized to N-radical cations for storing anions. 40 At the same time, a new peak located at 1063 cm −1 emerged with gradually enhanced intensity, which would be assigned to the anion of ClO 4 −. As the discharge process proceeds, the C-N and C]N peaks return to their original state, and the characteristic peak of ClO 4 − progressively disappeared, manifesting that the N in the Pz unit acts as the active site for the storage of ClO 4 − in the BPyPz cathode.…”

Recent Advancements in Devising Computational Strategies for Dual‐Ion Batteries

“…Graphenylene is another such material composed of biphenylene rings, which exhibits a low diffusion barrier of 0.5 eV and a lower AlCl 4 binding strength [49] . In order to obtain higher capacities and flexibility leading to longer cycle life, organic material cathodes like coronene, pyrene, tetraphenylbiphenyldiamine, and so on have also been modelled [50,51] . Aluminum sulfur batteries based on non‐aqueous electrolytes can also be considered as DIBs as they also involve AlCl 4 and Al 2 Cl 7 anions.…”

“…[49] In order to obtain higher capacities and flexibility leading to longer cycle life, organic material cathodes like coronene, pyrene, tetraphenylbiphenyldiamine, and so on have also been modelled. [50,51] Aluminum sulfur batteries based on non-aqueous electrolytes can also be considered as DIBs as they also involve AlCl 4 and Al 2 Cl 7 anions. While the anode reaction is similar, at the cathode various polysulfides of Al are formed, the dissolution of which into the electrolyte leads to loss of reversibility and is a major challenge to further development.…”