A High-Energy Asymmetric Supercapacitor Based on Tomato-Leaf-Derived Hierarchical Porous Activated Carbon and Electrochemically Deposited Polyaniline Electrodes for Battery-Free Heart-Pulse-Rate Monitoring

被引：51

作者：

Aziz, Md. Abdul ^{[1
,2
]}

Shah, Syed Shaheen ^{[1
,3
,8
]}

Mahnashi, Yaqub Alhussain ^{[4
,5
]}

Mahfoz, Wael ^{[6
]}

Alzahrani, Atif Saeed ^{[1
,7
]}

Hakeem, Abbas Saeed ^{[1
]}

Shaikh, M. Nasiruzzaman ^{[1
]}

机构：

[1] King Fahd Univ Petr & Minerals, Interdisciplinary Res Ctr Hydrogen & Energy Storag, KFUPM Box 5040, Dhahran 31261, Saudi Arabia

[2] King Fahd Univ Petr & Minerals, KA CARE Energy Res & Innovat Ctr, Dhahran 31261, Saudi Arabia

[3] King Fahd Univ Petr & Minerals, Phys Dept, KFUPM Box 5047, Dhahran 31261, Saudi Arabia

[4] King Fahd Univ Petr & Minerals, Elect Engn Dept, KFUPM Box 5047, Dhahran 31261, Saudi Arabia

[5] King Fahd Univ Petr & Minerals, Ctr Commun Syst & Sensing, Dhahran 31261, Saudi Arabia

[6] King Fahd Univ Petr & Minerals, Chem Dept, Dhahran 31261, Saudi Arabia

[7] King Fahd Univ Petr & Minerals, Mat Sci & Engn Dept, Dhahran 31261, Saudi Arabia

[8] Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Nishikyo Ku, Kyoto 6158520, Japan

来源：

SMALL | 2023年 / 19卷 / 33期

关键词：

activated carbon; asymmetric supercapacitors; ionic liquid electrolytes; large potential windows; polyaniline; PERFORMANCE; COMPOSITES; NANOFIBERS; TEMPERATURE; BIOMASS; FILMS;

D O I：

10.1002/smll.202300258

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A simple and scalable method to fabricate a novel high-energy asymmetric supercapacitor using tomato-leaf-derived hierarchical porous activated carbon (TAC) and electrochemically deposited polyaniline (PANI) for a battery-free heart-pulse-rate monitor is reported. In this study, TAC is prepared by simple pyrolysis, exhibiting nanosheet-type morphology and a high specific surface area of approximate to 1440 m(2) g(-1), and PANI is electrochemically deposited onto carbon cloth. The TAC- and PANI- based asymmetric supercapacitor demonstrates an electrochemical performance superior to that of symmetric supercapacitors, delivering a high specific capacitance of 248 mF cm(-2) at a current density of 1.0 mA cm(-2). The developed asymmetric supercapacitor shows a high energy density of 270 mu Wh cm(-2) at a power density of 1400 mu W cm(-2), as well as an excellent cyclic stability of approximate to 95% capacitance retention after 10 000 charging-discharging cycles while maintaining approximate to 98% Coulombic efficiency. Impressively, the series-connected asymmetric supercapacitors can operate a battery-free heart-pulse-rate monitor extremely efficiently upon solar-panel charging under regular laboratory illumination.

引用

页数：12

共 78 条

[31] Preparation of electrospun Co3O4 nanofibers as electrode material for high performance asymmetric supercapacitors [J].