Towards high performance of supercapacitor: New approach to design 3 D architectured electrodes with bacteria

Lee, Kwang Se; Park, Chan Woo; Cho, In-Cheol; Kim, Patrick Joo Hyun; Pol, Vilas G.; Park, Inkyu; Ko, Jang Myoun

doi:10.1016/j.jiec.2019.06.010

Cited by 14 publications

(3 citation statements)

References 46 publications

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“…In a 15 mL tube filled with Luria Bertani (LB) broth (LPS solution Inc. Korea), E. coli O157:H7 (ATCC) cells were generated and cultured for an entire night at 37 °C while being shaken (150 rpm). By measuring UV absorbance at 600 nm, and optical density 1 (equivalent to 10 9 cells/mL), the cell density of bacteria was determined [ 1 ].…”

Section: Methodsmentioning

confidence: 99%

“…The electrochemical capacitor (ECC) is an energy storage device, which is also called supercapacitor or ultracapacitor [ 1 , 2 ]. The energy storage devices with a high power and energy density are in high demand for versatile applications, such as industrial equipment, modern electric vehicles, and other small devices [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the heteroatom nitrogen, which is a component of E. coli bacteria, contributes to the increase in capacitance when the bacteria are present. In a study by Kwang et al, it was found that the bacterium E. coli improved the electrochemical performance of electrodes in the composite [ 1 ]. As a result, when compared to CNT and PPy/CNT composite electrodes, the PPy/CNT– E. coli composite electrodes showed better electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

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Two-Dimensional Heterostructure of PPy/CNT–E. coli for High-Performance Supercapacitor Electrodes

et al. 2022

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The nano-biocomposite electrodes composed of carbon nanotube (CNT), polypyrrole (PPy), and E. coli-bacteria were investigated for electrochemical supercapacitors. For this purpose, PPy/CNT–E. coli was successfully synthesized through oxidative polymerization. The PPy/CNT–E. coli electrode exhibited a high specific capacitance of 173 F∙g−1 at the current density of 0.2 A∙g−1, which is much higher than that (37 F∙g−1) of CNT. Furthermore, it displayed sufficient stability after 1000 charge/discharge cycles. The CNT, PPy/CNT, and PPy/CNT–E. coli composites were characterized by x-ray diffraction, scanning electron microscopy, and surface analyzer (Brunauer–Emmett–Teller, BET). In particular, the pyrrole monomers were easily adsorbed and polymerized on the surface of CNT materials, as well as E. coli bacteria enhanced the surface area and porous structure of the PPy/CNT–E. coli composite electrode resulting in high performance of devices.

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Section: Methodsmentioning

confidence: 99%