All-solid-state yarn supercapacitors based on hierarchically structured bacterial cellulose nanofiber-coated cotton yarns

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• 作者：Qi Xu ; Lingling Fan ; Ye Yuan ; Chengzhuo Wei ; Zikui Bai ; Jie Xu
• 关键词：Yarn supercapacitors ; All ; solid ; state ; Bacterial cellulose ; Hierarchical structure ; Polypyrrole
• 刊名：Cellulose
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：23
• 期：6
• 页码：3987-3997
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Bioorganic Chemistry; Physical Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer Netherlands
• ISSN：1572-882X
• 卷排序：23

文摘

Yarn supercapacitors (YSCs) have shown great application potential in wearable electronics or smart textiles due to their flexibility and weavability. The bottleneck of YSCs, however, is their low energy density. Here, we report an all-solid-state YSC based on hierarchically structured cotton yarns coated by bacterial cellulose (BC) nanofibers. Hierarchical structures facilitate the electrolyte to access the active materials and effectively reduce the diffusional limitation of electrolyte. This YSC shows a high capacitance of 76.6 mF cm−2 at a discharge current density of 0.42 mA cm−2 and an impressive energy density of 16.9 μ Wh cm−2 at a power density of 10.9 μW cm−2. In addition, the YSC is highly flexible and durable in repeated bending tests.