Analysis and experiment of capacitor charging characteristics

Ma, Ning; Liu, Weijian; Qin, Zhenjie; Xiangdong, Lai; Dong, Feng

doi:10.1088/1757-899x/272/1/012004

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…Owing to the high leakage resistance, Vac_20s recorded highest surface capacitance ( C Leak ) of 209.3 mF while other samples recorded <150 mF. Materials with higher current leakage resistance are favorable in terms of long-term voltage retention after charging. , It is crucial to note that the amplitude applied (10 mV) during impedance analysis is extremely small, where the amount of charge stored is irrespective of the surface area of the electrode. In other words, the C Leak recorded in the impedance spectra depends solemnly on the capability of the samples to hold charges after charging.…”

Section: Resultsmentioning

confidence: 99%

Improving Fresh and End-Used Carbon Surface by Sunlight: A Step Forward in Sustainable Carbon Processing

Ling,

Misnon,

Rahim

et al. 2023

ACS Sustainable Chem. Eng.

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Carbon is at the forefront of sustainable materials; the modification of its surface is pivotal to many traditional and advanced applications. Conventional hightemperature activation or chemical etching for carbon surface modification is time-and energy-intensive as well as requiring a high volume of toxic chemicals; therefore, a cheaper, quicker, and eco-friendly technique is a step forward toward its sustainable processing. Herein, modification of fresh and end-used carbon surface through focusing the sunlight is demonstrated as a clean, sustainable, and instantaneous surface modification technique for electrochemical charge storage application. Temporal evolution of the carbon surface is monitored using field-emission scanning electron microscopy, gas adsorption measurements, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Results demonstrate that solar irradiation led to the rapid release of moisture, which in turn generated newer pores. Electrochemical analyses showed that treating the porous carbon for 20 s boosted its electrical double layer capacitance by 56%. The usefulness of the solar treatment in recovering degraded electrochemical capacitor electrodes was also investigated, where 95% of the electrochemical performance was restored. This work demonstrated the feasibility of utilizing focused sunlight for surface treatment, suggesting utilizing sunlight for a sustainable, activation agent-free, and rapid surface treatment technique.

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Section: Resultsmentioning

confidence: 99%