期刊
CELLULOSE
卷 26, 期 17, 页码 9349-9359出版社
SPRINGER
DOI: 10.1007/s10570-019-02727-z
关键词
Supercapacitor; Graphene; Textile; Flexibility; Stretchability
资金
- National Natural Science Foundation of China [21875091, 51672114]
- Natural Science Foundation of Jiangsu province [BK20171295, BK20161357]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_2235]
Through a facile dipping and drying process, reduced graphene oxide, here simply referred to as graphene, was successfully coated onto a commercial textile substrate, resulting in a high-performance supercapacitor electrode with excellent flexibility and stretchability. With the assistance of difunctional chitosan (for dispersing and gluing), a high graphene loading amount of 5.5 mg cm(-2) was achieved on cotton textile within 10 soaking times. The graphene@cotton-10 had a low sheet resistance of 1.75 Ohm sq(-1), which merely increased 0.51 and 0.78 Ohm sq(-1) when being bent at 180 degrees and stretched with 100% strain, respectively. In a three-electrode configuration, the areal specific capacitance of the graphene@cotton-10 reached up to 232 mF cm(-2) at the current density of 1 mA cm(-2), which was superior to most of the carbon@textile flexible electrodes reported so far. The resulting graphene@cotton-10 symmetrical supercapacitor had a decent energy density of 4.38 mu Wh cm(-2) at 5 mW cm(-2). Cycling test revealed the supercapacitor had more than 80% retention of its initial capacitance after 5000 cycles at 5 mA cm(-2), demonstrating an outstanding long-term durability. Furthermore, the synthesis methodology established in this study is simple, efficient and environment-friendly, which possesses a great potential for large-scale practical applications.
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