Design of organic cathode material based on quinone and pyrazine motifs for rechargeable lithium and zinc batteries

Menart, Svit (author), Lužanin, Olivera (author), Pirnat, Klemen (author), Pahovnik, David (author), Moškon, Jože (author), Dominko, Robert (author)

Despite the rapid expansion of the organic cathode materials field, we still face a shortage of materials obtained through simple synthesis that have stable cycling and high energy density. Herein, we report a two-step synthesis of a small organic molecule from commercially available precursors that can be used as a cathode material. Oxidized tetraquinoxalinecatechol (OTQC) was derived from tetraquinoxalinecatechol (TQC) by the introduction of additional quinone redox-active centers into the structure. The modification increased the voltage and capacity of the material. The OTQC delivers a high specific capacity of 327 mAh g$^{−1}$ with an average voltage of 2.63 V vs Li/Li$^+$ in the Li-ion battery. That corresponds to an energy density of 860 Wh kg$^{−1}$ on the OTQC material level. Furthermore, the material demonstrated excellent cycling stability, having a capacity retention of 82% after 400 cycles. Similarly, the OTQC demonstrates increased average voltage and specific capacity in comparison with TQC in aqueous Zn−organic battery, reaching the specific capacity of 326 mAh g$^{−1}$ with an average voltage of 0.86 V vs Zn/Zn$^{2+}$. Apart from good electrochemical performance, this work provides an additional in-depth analysis of the redox mechanism and degradation mechanism related to capacity fading.

• Language: English
• Keywords: organic cathode, pyrazine, quinone, catechol, Li−organic battery, Zn−organic battery, aqueous electrolyte, batteries, electrodes, electrolytes, materials, stability
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 16029–16039
• Numbering: Vol. 16, iss. 13
• PID: 20.500.12556/RUL-159759
• UDC: 544.5/.6
• ISSN on article: 1944-8252
• DOI: 10.1021/acsami.3c16038
• COBISS.SI-ID: 201905923
• Publication date in RUL: 23.07.2024

Record is a part of a journal

• Title: ACS applied materials & interfaces
• Shortened title: ACS appl. mater. interfaces
• Publisher: American Chemical Society
• ISSN: 1944-8252
• COBISS.SI-ID: 516049433

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: elektrokemija, baterije, vodna elektroliza, organske katode