文献类型：期刊文献

英文题名：A Highly Flexible Supercapacitor Based on MnO2/RGO Nanosheets and Bacterial Cellulose-Filled Gel Electrolyte

作者：Fei, Haojie[1];Saha, Nabanita[1];Kazantseva, Natalia[1];Moucka, Robert[1];Cheng, Qilin[1,2];Saha, Petr[1]

机构：[1]Tomas Bata Univ Zlin, Ctr Polymer Syst, Tr T Bati 5678, Zlin 76001, Czech Republic;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2017

卷号：10

期号：11

外文期刊名：MATERIALS

收录：;EI(收录号：20174604398738);WOS:【SCI-EXPANDED(收录号:WOS:000416786200029)】；

基金：This work was mainly supported by the Ministry of Education, Youth, and Sports of the Czech Republic (project no. LTACH17015), NPU Program I (LO1504) and Operational Program Research and Development for Innovations co-funded by the European Regional Development Fund (ERDF) and national budget of the Czech Republic, within the framework of the CPSstrengthening research capacity (reg. number: CZ.1.05/2.1.00/19.0409). First author is thankful for Internal Grant Agency (IGA/CPS/2015/008 and IGA/CPS/2016/003) for the financial support received from Tomas Bata University in Zlin, Czech Republic.

语种：英文

外文关键词：flexible asymmetric supercapacitor; manganese dioxide; two-dimensional material; reduced graphene oxide; bacterial cellulose; gel electrolyte

摘要：The flexible supercapacitors (SCs) of the conventional sandwich-type structure have poor flexibility due to the large thickness of the final entire device. Herein, we have fabricated a highly flexible asymmetric SC using manganese dioxide (MnO2) and reduced graphene oxide (RGO) nanosheet-piled hydrogel films and a novel bacterial cellulose (BC)-filled polyacrylic acid sodium salt-Na2SO4 (BC/PAAS-Na2SO4) neutral gel electrolyte. Apart from being environmentally friendly, this BC/PAAS-Na2SO4 gel electrolyte has high viscosity and a sticky property, which enables it to combine two electrodes together. Meanwhile, the intertangling of the filled BC in the gel electrolyte hinders the decrease of the viscosity with temperature, and forms a separator to prevent the two electrodes from short-circuiting. Using these materials, the total thickness of the fabricated device does not exceed 120 m. This SC device demonstrates high flexibility, where bending and even rolling have no obvious effect on the electrochemical performance. In addition, owing to the asymmetric configuration, the cell voltage of this flexible SC has been extended to 1.8 V, and the energy density can reach up to 11.7 Wh kg(-1) at the power density of 441 W kg(-1). This SC also exhibits a good cycling stability, with a capacitance retention of 85.5% over 5000 cycles.