Sol-gel synthesized carbon nanoparticles as supercapacitor electrodes with ultralong cycling stability

Verma, Sonali; Padha, Bhavya; Singh, Anoop; Khajuria, Samarth; Sharma, Asha; Mahajan, Prerna; Singh, B.; Arya, Sandeep

doi:10.1080/1536383x.2021.1928645

Cited by 26 publications

(13 citation statements)

References 36 publications

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“…The band observed at 1052 cm –1 is mainly due to −CO bonds as a result of exposure to atmospheric carbon and oxygen species . Moreover, the presence of bands at 1115 and 1348 cm –1 could be ascribed to CO 3 . − The bands at 1433 and 1250 cm –1 could be ascribed to the C–H bending vibrations . The Raman spectroscopy of the Ni–Mn based electrode is shown in Figure S3.…”

Section: Resultsmentioning

confidence: 99%

“…Among them, supercapacitors are gaining popularity for space applications as they significantly overcome various serious limitations of lithium (Li)-ion batteries and are capable of withstanding the harsh environmental conditions encountered in space. , Moreover, the performance of supercapacitors with the decrease in temperature does not decline much in comparison to the currently used Li-ion batteries. Supercapacitors exhibit unique characteristics such as high power, long cycle life as well as eco-friendly nature, acting as a bridge between conventional capacitors (high power), − and batteries/fuel cells [good energy density (ED)] in terms of energy-power difference. − Some significant advantages of a supercapacitor are high power density (PD), high capacitance, low internal series resistance, broad operating temperature range, and negligible change in internal resistance with time, thus exhibiting high charging and discharging cycle life. − These excellent characteristics make supercapacitors promising for space applications, especially in small satellites …”

Section: Introductionmentioning

confidence: 99%

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Thermoelectric-Powered Supercapacitors Based on Ni–Mn Nanowires Driven by Quadripartite Electrolyte

Verma

Padha

Arya

2022

ACS Appl. Energy Mater.

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Thermal energy is copiously available, especially low-grade heat which is typically wasted as a byproduct without use. Tapping into this immense energy reservoir with cost-effective technologies may become a key element for an energy-sustainable economy and society. The utilization of this waste thermal energy holds great potential in space applications for generating electric energy without using a solar panel. With this approach of harvesting heat energy, Ni−Mn composite nanowire-based electrodes synthesized via the electrochemical deposition technique are used to assemble a thermoelectric-powered supercapacitor. For charging purpose, the thermoelectric phenomenon of a quadripartite gel electrolyte [K 3 Fe(CN) 6 + K 4 Fe(CN) 6 + KOH + PVA] is tested. High-grade flexible copper tape used as a substrate can withstand high temperature and is perfectly suitable for thermoelectric devices. The fabricated symmetric device attained a high specific capacitance of 556 F/g at 4 mA in addition to a high energy density of 173.75 W h/kg at 3 kW/kg. Moreover, the fabricated thermoelectric-powered device attains a maximum voltage of ∼60 mV as a result of a temperature difference in the range of 8−10 °C. The proposed supercapacitor offers opportunities for the development of future devices that simultaneously harvest and store energy.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermoelectric-Powered Supercapacitors Based on Ni–Mn Nanowires Driven by Quadripartite Electrolyte

Verma

Padha

Arya

2022

ACS Appl. Energy Mater.

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“…First, we understand that a single carbon atom has six electrons in its orbitals across the 1s 2 , 2s 2 , 2px, and 2py orbitals. 53 The amalgamation of two or more carbon atoms results in the promotion of one electron from the 2s orbital to the 2pz orbital. Graphite formation from carbon atoms results in three sp 2 orbitals created through the hybridization of carbons’ 2s 2 , 2px, and 2py atomic orbitals.…”

Section: Categories Of Graphene-based Es-fabricated Fibers For Emi Sh...mentioning

confidence: 99%

“…Graphene–graphene electrospun composites are composites containing two or more forms of graphene in their various forms (GO, rGO, graphene (GN), GQDs, rGQDs, etc.). First, we understand that a single carbon atom has six electrons in its orbitals across the 1s 2 , 2s 2 , 2px, and 2py orbitals . The amalgamation of two or more carbon atoms results in the promotion of one electron from the 2s orbital to the 2pz orbital.…”

Section: Categories Of Graphene-based Es-fabricated Fibers For Emi Sh...mentioning

confidence: 99%

Graphene-Based Electrospun Fibrous Materials with Enhanced EMI Shielding: Recent Developments and Future Perspectives

Orasugh

Ray

2022

ACS Omega

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As a result of advancements in electronics/telecommunications, electromagnetic interference (EMI) pollution has gotten worse. Hence, fabrication/investigation of EMI shields having outstanding EMI shielding performance is necessary. Electrospinning (ES) has recently been established in several niches where 1D nanofibers (NFs) fabricated by ES can provide the shielding of EM waves, owing to their exceptional benefits. This review presents the basic correlations of ES technology and EMI shielding. Diverse graphene (GP)-based fibrous materials directly spun via ES as EMI shields are discussed. Electrospun EMI shields as composites through diverse post-treatments are reviewed, and then different factors influencing their EMI shielding characteristics are critically summarized. Finally, deductions and forthcoming outlooks are given. This review provides up to date knowledge on the advancement of the application of graphene-based electrospun fibers/composite materials as EMI shields and the outlook for high-performance electrospun fibers/composite-based EMI shielding materials.

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“…In addition, the devices can communicate with other devices, such as smartphones, through near-field communication (NFC). [17][18][19] Wearable technologies have developed these devices to help users stay active and perform at their best.…”

Section: Introductionmentioning

confidence: 99%

An Insight into the Wearable Technologies Based on Novel Hybrid Piezoelectric‐Triboelectric Nanogenerators

et al. 2023

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Hybrid piezoelectric‐triboelectric nanogenerators (HPTNGs) are a new energy storage device that combines the benefits of both technologies. This technology can revolutionize energy storage and bring down solar and renewable costs. HPTNGs are becoming increasingly popular in the wearable technology market due to their unique characteristics. HPTNGs feature hybrid piezoelectric and triboelectric modes, allowing them to generate electricity from low voltage and sound waves. This combination gives them a higher performance than either type of generator, making them ideal for applications such as mobile banking, health monitoring, and smart home control. This article begins with a discussion on the structural configuration of hybrid HPTNGs, followed by describing their coupling effect and applications in wearable technology. Furthermore, it also focuses on the challenges, possible solutions, and prospects of this device in the wearable industry.

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Sol-gel synthesized carbon nanoparticles as supercapacitor electrodes with ultralong cycling stability

Cited by 26 publications

References 36 publications

Thermoelectric-Powered Supercapacitors Based on Ni–Mn Nanowires Driven by Quadripartite Electrolyte

Thermoelectric-Powered Supercapacitors Based on Ni–Mn Nanowires Driven by Quadripartite Electrolyte

Graphene-Based Electrospun Fibrous Materials with Enhanced EMI Shielding: Recent Developments and Future Perspectives

An Insight into the Wearable Technologies Based on Novel Hybrid Piezoelectric‐Triboelectric Nanogenerators

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