An organic cathode with tailored working potential for aqueous Zn-ion batteries

Abstract

Up to 0.61 V increase in the working potential was achieved by modifying the anthraquinone (AQ) molecular structure with a stronger electron-withdrawing cyano group.

Hydrated Deep Eutectic Electrolytes for High‐Performance Zn‐Ion Batteries Capable of Low‐Temperature Operation

“…These results surpass recently reported ZIBs with organic cathodes (Table S2, Supporting Information). [29,[46][47][48][49][50][51][52] The cycled Zn|AE|PANI cell swelled significantly (by 127%), indicating serious gas evolution (Figure S19a,b, Supporting Information). In contrast, the thickness of Zn|Z6S|PANI cell was constant for 2500 cycles (Figure S19c,d, Supporting Information).…”

An Ultrahigh Performance Zinc‐Organic Battery using Poly(catechol) Cathode in Zn(TFSI)2‐Based Concentrated Aqueous Electrolytes

“…i) This work (solid stars): P(4VC 86 -stat-SS 14 ) in 4 m Zn(TFSI) 2 . ii) Small organic molecules (semi-filled symbols): 1) p-chloranil,[66] 2) calix[4]quinone,[62] 3) pyrene-4,5,9,10-tetraone,[60] 4) 1,4 bis(diphenylamino)benzene,[67] 5) triangular phenanthrenequinone-based macrocycle,[68] 6) dibenzo[b,i] thianthrene-5,7,12,14-tetraone,[69] 7) 3,4,9,10-perylenetetracarboxylic dianhydride,[70] 8) tetracyanoanthraquinodimethane,[71] and 9) phenazine [72]. iii) RAPs (filled symbols): 10) poly(benzoquinonyl sulfide),[73] 11) poly(dopamine),[58] 12) poly(catechol),[61] 13) Cu 3 (HHTP) 2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene),[74] 14) poly(tetrathiafulvalene),[75] 15) poly(aniline-S),[76] 16) poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl vinyl ether),[77] 17) polyarylimide covalent organic framework,[78] 18) poly(dopamine),[79] and 19) hydroquinone covalent organic framework [80].…”

High‐Performance Aqueous Zinc Batteries Based on Organic/Organic Cathodes Integrating Multiredox Centers

“…[44] Hence, the Zn//C@multi-layer polymer cell possessed the outstanding capacity, rate capability, and cycling stability compared with the state-of-the-art aqueous ZIBs across different classes of cathodes, including small organic molecules, conducting polymers, and partial inorganic cathodes (Figure 4d; and Table S3, Supporting Information). [2,15,17,21,22,24,26,[29][30][31][44][45][46][47][48][49][50] Furthermore, the lower energy level of LUMO, the stronger electron affinity C@multi-layer polymer cathodes exhibit. As revealed, poly(pAP) delivers a much lower E LUMO value of −3.85 eV than that of poly(1,5-NAPD), suggesting that poly(pAP) owns greater electron affinity and higher discharge potential than poly(1,5-NAPD).…”

“…[24] To date, the reversible electrochemical reactions between cations and redox groups of CO, CN, and CN have been studied in Zn-organic batteries. [25][26][27][28] For instance, Chen's group first reported cially calix (C4Q) cathode for building high capacity and long lifespan Zn-organic batteries, yet their large scale applications are limited by the complex synthesis process. [29] Stoddart's group studied phenanthrenequinone-based macrocycle (PQ-Δ) organic cathode, which demonstrates the insertion of hydrated zinc ions and robust triangular structure are benefit to achieve Zn-organic batteries with superior stability.…”