The Many Deaths of Supercapacitors: Degradation, Aging, and Performance Fading (Adv. Energy Mater. 29/2023)

Yambou, Emmanuel Pameté; Köps, Lukas; Kreth, Fabian Alexander; Pohlmann, Sebastian; Varzi, Alberto; Brousse, Thierry; Balducci, Andrea; Presser, Volker

doi:10.1002/aenm.202370125

Cited by 5 publications

(8 citation statements)

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“…[1] Due to these benefits, they are implemented in a large number of applications, e. g. transportation, grid stability, memory backup, or wind turbines. [1][2] The storage processes occurring in EDLCs are of physical nature. [3] The formation/depletion of an electric double-layer at the electrode/electrolyte interphase determines the features of these high-power devices, and thus affect the aging.…”

Section: Introductionmentioning

confidence: 99%

“…[1,4] The aging of EDLCs, which typically leads to loss of capacitance and increase in resistance is a complex process that involves various failure mechanisms, each playing a crucial role. [2,5] These mechanisms involve structural and chemical changes, material dissolution, and corrosion of metal current collectors during cell operation. All of them can impact performance under varying operating conditions like temperature, humidity, and voltage, with increased temperatures potentially inducing undesired chemical reactions and low temperatures causing electrolyte freezing and mechanical stress.…”

Section: Introductionmentioning

confidence: 99%

“…All of them can impact performance under varying operating conditions like temperature, humidity, and voltage, with increased temperatures potentially inducing undesired chemical reactions and low temperatures causing electrolyte freezing and mechanical stress. [2,6] In the past most effort has been directed towards examining and understanding the aging occurring on the electrodes of EDLCs. Less attention has been dedicated to the processes occurring with the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that the degradation of the electrolyte, e. g. during high voltage test, might lead to the generation of gases and side products which, in turn, lead to increased pressure and pore blocking. [2] The evaluation of formed gases and electrode decomposition products has been studied rather intensely. [6a,7] In contrast, several aspects related to the electrolyte's aging are still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Post‐Mortem Gas Chromatography‐Mass Spectrometry Analysis of Aging Processes in Acetonitrile‐based Supercapacitors

Kost,

Kreth,

Balducci

2024

ChemElectroChem

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An ongoing challenge in the field of supercapacitors revolves around comprehending their failure mechanisms. The aging processes occurring at the electrode/electrolyte interphase of these devices are complex. Thus far, much attention has been directed toward examining the aging of electrodes, while fewer studies have been dedicated to the electrolyte's aging. This study aims to address this point and to gain a deeper understanding of the importance of individual decomposition products on the overall decomposition of the electrolytic solution of electric double‐layer capacitors. Therefore, the decomposition of the state‐of‐the‐art electrolyte 1 m solution of tetraethylammonium‐tetrafluoroborate in acetonitrile and that of the same electrolyte doped with compounds known to form during its aging, such as acetamide, 2,4,6‐trimethyl‐1,3,5‐triazine, and triethylamine has been investigated post‐mortem. The results of this study show that GC‐MS is a useful technique to interpret and understand the degradation processes taking place in the electrolytes of supercapacitors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Post‐Mortem Gas Chromatography‐Mass Spectrometry Analysis of Aging Processes in Acetonitrile‐based Supercapacitors

Kost,

Kreth,

Balducci

2024

ChemElectroChem

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“…Aqueous electrolytes provide higher ionic conductivity and lower resistance than organic electrolytes [18,19] . However, the evaporation of water in case of non‐optimal encapsulation causes precipitation of the electrolytic salts and, consequently, performance degradation [20] . Moreover, it is not possible to implement the devices in flexible applications.…”

Section: Introductionmentioning

confidence: 99%

Impact of Acetate‐Based Hydrogel Electrolyte on Electrical Performance and Stability of Eco‐Friendly Supercapacitors

Landi,

La Notte,

Granata

et al. 2023

ChemElectroChem

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The electrochemical characteristics and stability of hydrogel‐based environmentally friendly supercapacitors employing sodium acetate as salt have been investigated. To ensure the overall sustainability of the devices, chitosan (a biomaterial from renewable resources) and activated carbon (derived from coconut shells) have been used as a binder and filler within the electrodes, respectively. Cyclic voltammetry, galvanostatic charge/discharge, and impedance spectroscopy measurements have been performed to compare the electrochemical properties of the fabricated devices. Compared to reference electrolytes containing NaCl, the utilization of sodium acetate exhibited enhancements in energy performance and stability up to 50000 cycles. The most efficient device has been delivered approximately 10.6 Wh/kg of energy at a high‐power density of about 3940 W/kg. A comprehensive investigation of the electrochemical performances has been carried out, considering both faradaic and non‐faradaic processes as charge storage mechanisms within the devices. A model has been proposed to describe the storage mechanisms and to provide insights into the ageing phenomena observed during the cycling procedure.

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Elucidating the Energy Storage Performance of 2D Metallic Vanadium Ditelluride/Carbon Nanotube for Next‐Generation Asymmetric Supercapacitors Using Emerging MoSSe/Carbon Nanotube

Koottumvathukkal Anil,

Radhakrishnan,

Kuniyil

et al. 2024

Adv Energy and Sustain Res

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Recently, vanadium ditelluride (VTe2) a member of the transition metal ditellurdies family has emerged as a functional material for energy storage applications owing to its exotic intrinsic properties. Similar to most of the nanostructured materials, a hybrid structure of VTe2 is expected to provide enhanced energy storage capability. Herein, two hybrid structures of VTe2 are engineered using well‐explored nanocarbons such as RGO and carbon nanotube (CNT) to create a compelling supercapacitor electrode material. Both the hybrid structures show improved electrochemical activity, but VTe2/CNT fared better in the charge storage efficiency. The enhanced active sites, short ionic/electronic pathways provided by the CNT network, and the large electric double‐layer contribution have synergized for the inflated capacitance of VTe2/CNT. Further, a high‐performance asymmetric supercapacitor (ASC) of VTe2/CNT//MoSSe/CNT is constructed in a typical Swagelok cell, and the ASC delivered an energy density output of 36.28 Wh kg−1 at a power density of 463.16 W kg−1 with a remarkable 80.26% capacitance retention. The results of this work suggest that VTe2/CNT is a promising contender in the pantheon of functional materials for energy storage applications in the near future.

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The Many Deaths of Supercapacitors: Degradation, Aging, and Performance Fading (Adv. Energy Mater. 29/2023)

Cited by 5 publications

References 0 publications

Post‐Mortem Gas Chromatography‐Mass Spectrometry Analysis of Aging Processes in Acetonitrile‐based Supercapacitors

Post‐Mortem Gas Chromatography‐Mass Spectrometry Analysis of Aging Processes in Acetonitrile‐based Supercapacitors

Impact of Acetate‐Based Hydrogel Electrolyte on Electrical Performance and Stability of Eco‐Friendly Supercapacitors

Elucidating the Energy Storage Performance of 2D Metallic Vanadium Ditelluride/Carbon Nanotube for Next‐Generation Asymmetric Supercapacitors Using Emerging MoSSe/Carbon Nanotube

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