Multi-redox phenazine/non-oxidized graphene/cellulose nanohybrids 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 Seokwoo Jeon 

机构地区：[1]Department of Materials Science and Engineering,Advanced Battery Center,Korea Advanced Institute of Science and Technology(KAIST),Daejeon,34141,Republic of Korea [2]Department of Materials Science and Engineering,Chungnam National University,Daejeon,34134,Republic of Korea [3]Thin Film Materials Research Center,Korea Research Institute of Chemical Technology(KRICT),Daejeon,34114,Republic of Korea [4]Department of Materials Science and Engineering,Seoul National University,Seoul,08826,Republic of Korea

出　　处：《Nano Research》2021年第5期1382-1389,共8页纳米研究（英文版）

基　　金：This research was supported by Creative Materials Discovery Program(2017M3D1A1039558);Nano-Material Technology Development Program(NRF-2016M3A7B4900119)through the National Research Foundation of Korea(NRF);funded by the Ministry of Science,ICT and Future Planning(MSIP);This work was also supported by the NRF of the Korea Government(MSIP)under Grant 2016R1E1A1A01943131.

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.

关 键 词：energy storage organic electrodes BATTERIES GRAPHENE cellulose nanofibers 

分 类 号：TQ127.11[化学工程—无机化工] TM91[电气工程—电力电子与电力传动]