Multi-redox phenazine/non-oxidized graphene/cellulose nano-hybrids as ultrathick cathodes for high-energy organic batteries

• 作者: Youngjin Ham Vitalii Ri Jin Kim Yeoheung Yoon Jinho Lee Kisuk Kang Ki-Seok An Chunjoong Kim and Seokwoo Jeon
• 来源期刊: 纳米研究（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: Research Articles
• 页码范围: 1382-1389
• 页数: 8页
• 语种: 英文

摘要

Various redox-active organic molecules can serve as ideal electrode materials to realize sustainable energy storage systems.Yet,to be more appropriate for practical use,considerable architectural engineering of an ultrathick,high-loaded organic electrode with reliable electrochemical performance is of crucial importance.Here,by utilizing the synergetic effect of the non-covalent functionalization of highly conductive non-oxidized graphene flakes (NOGFs) and introduction of mechanically robust cellulose nanofiber (CNF)-intermingled structure,a very thick (≈ 1 mm),freestanding organic nanohybrid electrode which ensures the superiority in cycle stability and areal capacity is reported.The well-developed ion/electron pathways throughout the entire thickness and the enhanced kinetics of electrochemical reactions in the ultrathick 5,10-dihydro-5,10-dimethylphenazine/NOGF/CNF (DMPZ-NC)cathodes lead to the high areal energy of 9.4 mWh·cm-2 (=864 Wh·kg-1 at 158 W·kg-1).This novel ultrathick electrode architecture provides a general platform for the development of the high-performance organic battery electrodes.