Structural recovery of highly oxidized single-walled carbon nanotubes fabricated by kneading and electrochemical applications
- Structural recovery of highly oxidized single-walled carbon nanotubes fabricated by kneading and electrochemical applications
- 황준연; 이원기; 한중탁; 조준영; 김정훈; 장정인; 김준석; 이혜정; 박종환; 채지수; 노광철; 김호영; 정희진; 정승렬; 이건웅
- CNT; Structure; oxidation; electrochemistry
- Issue Date
- Chemistry of materials
- VOL 31, NO 9-3475
- Harsh oxidation of 1 nm single-walled carbon nanotubes (SWCNTs) can lead to fatal defect structures, which can jeopardize their mechanical and electrical performances. Here, we show the structural recovery of highly oxidized SWCNTs (Ox-SWCNTs), which were rapidly (within 1 h) oxidized by kneading without forming failure-causing defects inspired by flour dough. The rational oxidation of SWCNTs by kneading debundled the SWCNTs and led to obtaining thermodynamically stable SWCNT solutions in water or even in alcohol without dispersant molecules. Importantly, the structure of the Ox-SWCNTs could be recovered by chemical, thermal, photothermal, or solvothermal reduction, enhancing the electrical conductivity of the Ox-SWCNT films from ∼100 to ∼1000 S cm– 1. These Ox-SWCNTs and chemically reduced Ox-SWCNTs showed high performance in supercapacitors and Li-ion batteries as electrochemical conductors, respectively.
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