Solid-state 3D micro-supercapacitors based on ionogel electrolyte: Influence of adding lithium and sodium salts to the ionic liquid - ST2E Accéder directement au contenu
Article Dans Une Revue Energy Storage Materials Année : 2022

Solid-state 3D micro-supercapacitors based on ionogel electrolyte: Influence of adding lithium and sodium salts to the ionic liquid

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The ever-increasing interest in miniaturized Internet of Things devices and embedded electronics has given rise to a host of inquiries surrounding the need for safe, high performance energy storage devices. Solid-state 3D micro-supercapacitors based on ionogels provide a promising response to many of these pressing questions. Herein, leakage-free solid-state-like 3D micro-supercapacitors incorporating lithium and sodium salts added to 1-Ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide-based ionogels were investigated. The resulting micro-supercapacitors containing these lithium and sodium ions displayed energy densities of 10.2 and 9.5 µWh.cm−2 at power densities of 1.1 and 1.0 mW.cm−2, respectively. In those devoid of these alkaline ions, however, the energy density reached a mere 3 µWh.cm−2 at the same power density, thereby validating the proposed strategy. The 3D interdigitated MnO2 // MnO2 micro-supercapacitors were cycled 50 000 times at 1.75 mA.cm−2 with good capacitance retention (∼ 85 %). While performing under high temperatures (100°C), there was no evidence of electrolyte degradation, capacitance fading or electrolyte leakage.
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hal-03697655 , version 1 (22-07-2024)

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Thibaud Guillemin, Camille Douard, Kévin Robert, Bouchra Asbani, Christophe Lethien, et al.. Solid-state 3D micro-supercapacitors based on ionogel electrolyte: Influence of adding lithium and sodium salts to the ionic liquid. Energy Storage Materials, 2022, 50, pp.606-617. ⟨10.1016/j.ensm.2022.05.041⟩. ⟨hal-03697655⟩
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