期刊
CARBOHYDRATE POLYMERS
卷 196, 期 -, 页码 332-338出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.05.050
关键词
Enzymatically synthesized amylose; Iodine-doped amylose; Morphology-retaining carbonization; Low-density graphitic films; Supercapacitor
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [25246002, 16H06051]
- Grants-in-Aid for Scientific Research [16H06051] Funding Source: KAKEN
We have developed a novel approach for preparing low-density graphitic films using iodine-doped enzymatically synthesized amyloses (ESAs) with strictly controlled molecular weights as carbonization precursors. All of the iodine-doped ESA films retained their film structures and morphologies, even after the heat-treatment at 800 degrees C and 2600 degrees C. Therefore, iodine doping plays an indispensable role in retaining film structure and morphology during the carbonization of ESA polysaccharides. It was also elucidated that the carbonization yields of the ESA films can be controlled by changing the conditions of iodine doping process. The bulk densities of the graphitic films are varied from 0.08 to 0.42 g/cm(3) dependent on the doping level. In addition, the capacitance performances of the graphite films prepared from the ESAs are investigated using cyclic voltammetry and galvanostatic charge/discharge procedures. The potential utility of the carbonized and graphitized ESA films for supercapacitors was revealed. This approach may broaden the application and even the swill processing of polysaccharides.
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