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Sarmet, J., Taviot-Gueho, C., Thirouard, R., Leroux, F., Douard, C., Gaalich, I., Brousse, T., Toussaint, G. & Stevens, P. (2023) Electrochemical Behavior of Morphology-Controlled Copper (II) Hydroxide Nitrate Nanostructures. Crystal Growth & Design, 23 2634–2643.
Added by: Richard Baschera (2023-03-24 13:52:30) Last edited by: Richard Baschera (2023-05-05 14:57:35) |
| Type de référence: Article DOI: 10.1021/acs.cgd.2c01468 Numéro d'identification (ISBN etc.): 1528-7483 Clé BibTeX: Sarmet2023a Voir tous les détails bibliographiques  |
Catégories: IMN, ST2E Créateurs: Brousse, Douard, Gaalich, Leroux, Sarmet, Stevens, Taviot-Gueho, Thirouard, Toussaint Collection: Crystal Growth & Design |
Consultations : 1/317
Indice de consultation : 16% Indice de popularité : 4% |
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Nanostructure control is an important issue when using electroactive materials in energy conversion and storage devices. In this study, we report various methods of synthesis of nanostructured copper (II) hydroxide nitrate (Cu-2(OH)(3)NO3) with a layered hydroxide salt (LHS) structure using various synthesis methods and investigate the correlation between nanostructure, morphology, and their pseudocapacitive electrochemical behavior. The variations in nanostructure size and morphology were comprehensively explored by combining X-ray diffraction (XRD) and scanning electron microscopy (SEM), while the electrochemical activity was characterized using cyclic voltammetry. We demonstrate that Cu-2(OH)(3)NO3-LHS nanostructured submicron particles produced by alkaline precipitation with 88% of the copper cations can cycle with a two-electron redox process. Unfortunately, the electroactivity decreases rapidly from the first cycle due to the occurrence of structural transformations and subsequent electrochemical grinding. However, samples obtained by ultrasonication and microwave synthesis, two original synthesis methods for LHS materials, formed of nanosized crystalline domains agglomerated in micron-sized particles, represent a good compromise between capacity and cyclability. Moreover, by using pair distribution function analysis on electrode materials after repeated cycling, we were able to follow the chemical and structural changes occurring in Cu-2(OH)(3)NO3 materials during electrochemical cycling with first a quick transformation to Cu2O and then the appearance of Cu metal and copper acetate Cu(II)(2)(O2CCH3)(4)center dot 2H(2)O.
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