Lakraychi, A. E., Fahsi, K., Aymard, L., Poizot, P., Dolhem, F. & Bonnet, J. .-P. (2017) Carboxylic and sulfonic N-substituted naphthalene diimide salts as highly stable non-polymeric organic electrodes for lithium batteries. Electrochem. Commun. 76 47–50.
Added by: Richard Baschera (2017-04-28 13:01:15) Last edited by: Richard Baschera (2017-04-28 13:17:32)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 1388-2481
Clé BibTeX: Lakraychi2017
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Mots-clés: Cathode, energy-storage, Li-ion batteries, Lithium batteries, Naphthalene diimide, Organic batteries, organic electrode, performance
Créateurs: Aymard, Bonnet, Dolhem, Fahsi, Lakraychi, Poizot
Collection: Electrochem. Commun.
Consultations : 1/538
Indice de consultation : 3%
Indice de popularité : 0.75%
Two N-substituted naphthalene tetracarboxylic diimide (NTCDI) ionic compounds, carboxylic and sulfonic sodium salts, were prepared and used as positive electrode active materials in lithium-half cells. The aim of this investigation was to assess the solubility-suppressing effect of two different negatively charged substituent groups on a redox-active organic backbone using a carbonate-based liquid electrolyte. NTCDI derivatives were obtained in high yields from reaction of naphthalene tetracarboxylic dianhydride with neutralized glycine or with neutralized taurine. They were mixed with carbon black and cycled in galvanostatic mode against lithium metal using 1 M LiPF6 EC/DMC liquid electrolyte. These two NTCDI derivatives exhibit a quite stable electrochemical activity upon cycling at an average potential of 23 V vs. Li+/Li-0 giving rise to specific capacity values of 147 mAh.g(-1) and 113 mAh.g(-1) for the dicarboxylate and the disulfonate derivative, respectively. This study clearly supports the useful effect of such grafted permanent charges as a general rule on the electrochemical stability of crystallized organic materials based on the assembly of small redox-active units. (C) 2017 Elsevier B.V. All rights reserved.