Paper Supercapacitor Developed Using a Manganese Dioxide/Carbon Black Composite and a Water Hyacinth Cellulose Nanofiber-Based Bilayer Separator

被引:13
作者
Beg, Mustehsan [1 ]
Alcock, Keith M. [1 ]
Mavelil, Achu Titus [1 ]
O'Rourke, Dominic [1 ]
Sun, Dongyang [1 ]
Goh, Keng [1 ]
Manjakkal, Libu [1 ]
Yu, Hongnian [1 ]
机构
[1] Edinburgh Napier Univ, Sch Comp & Engn & Built Environm, Edinburgh EH10 5DT, Scotland
关键词
eco-friendly; cellulose; separator; supercapacitor; paper energy storage; flexible; ION; MEMBRANE; BATTERIES; BIOMASS;
D O I
10.1021/acsami.3c11005
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Flexible and green energy storage devices have a wide range of applications in prospective electronics and connected devices. In this study, a new eco-friendly bilayer separator and primary and secondary paper supercapacitors based on manganese dioxide (MnO2)/carbon black (CB) are developed. The bilayer separator is prepared via a two-step fabrication process involving freeze-thawing and nonsolvent-induced phase separation. The prepared bilayer separator exhibits superior porosity of 46%, wettability of 46.5 degrees, and electrolyte uptake of 194% when compared with a Celgard 2320 trilayer separator (39%, 55.58 degrees, and 110%). Moreover, lower bulk resistance yields a higher ionic conductivity of 0.52 mS cm(-1) in comparison to 0.22 mS cm(-1) for the Celgard separator. Furthermore, the bilayer separator exhibits improved mean efficiency of 0.44% and higher specific discharge capacitance of 13.53%. The anodic and cathodic electrodes are coated on a paper substrate using MnO2/CB and zinc metal-loaded CB composites. The paper supercapacitor demonstrates a high specific capacitance of 34.1 mF cm(-2) and energy and power density of 1.70 mu Wh cm(-2) and 204.8 mu W cm(-2) at 500 mu A, respectively. In summary, the concept of an eco-friendly bilayer cellulose separator with paper-based supercapacitors offers an environmentally friendly alternative to traditional energy storage devices.
引用
收藏
页码:51100 / 51109
页数:10
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