Assembly of symmetric supercapacitor based on alginate hydrogel electrolyte and polyaniline modified electrodes

被引:13
|
作者
Silva, Rafael J. [1 ]
Klobukoski, Vanessa [1 ]
de Paula, Jessica I. S. [1 ]
Riegel-Vidotti, Izabel C. [1 ]
Vidotti, Marcio [1 ]
机构
[1] Univ Fed Parana UFPR, Dept Quim, Grp Pesquisa Macromol & Interfaces, BR-81531980 Curitiba, PR, Brazil
基金
巴西圣保罗研究基金会;
关键词
Hydrogel electrolyte; Symmetric supercapacitor; Polyaniline; Conducting polymer; 3D housing; SOLID-STATE SUPERCAPACITORS; POLYMER ELECTROLYTE; CALCIUM ALGINATE; INDUCED GELATION; ACID; CHEMISTRY; STORAGE;
D O I
10.1016/j.electacta.2022.140914
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Biopolymer-based hydrogel electrolytes can be described as alternative materials for supercapacitors due to their good ionic conductivity, no liquid leakage, and no toxicity, allowing the construction of flexible devices. This work reports the preparation of alginate gels crosslinked with Ca2+, H+, and a combination of Ca2+ and H+, for use as electrolytes in a symmetric supercapacitor with polyaniline (PANI) films as electrodes. Results indicated that the gel formed with both Ca2+ and H+ showed to be the most appropriate for supercapacitor development for presenting the better electrochemical performance of PANI electrodes, higher values of ionic conductivity and capacitance, also presenting good cycling stability. The symmetrical supercapacitor assembled with the alginate gel and conventional PANI electrodes provided a specific capacitance of 15.08 F g-1 at 0.05 mA cm-2 and exhibited good cycling stability with 92% capacitance retention after 1100 cycles. Three supercapacitor devices fabricated with 3D printing were connected in series and used to power a red LED.
引用
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页数:9
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