Facile Synthesis and Phase Stability of Cu-based Na 2 Cu(SO 4 ) 2 .xH 2 O (x = 0-2) Sulfate Minerals as Conversion type Battery Electrodes - Archive ouverte HAL
Article Dans Une Revue Dalton Transactions Année : 2022

Facile Synthesis and Phase Stability of Cu-based Na 2 Cu(SO 4 ) 2 .xH 2 O (x = 0-2) Sulfate Minerals as Conversion type Battery Electrodes

Résumé

Mineral exploration forms a key approach to unveil functional battery electrode materials. Synthetic preparation of naturally found minerals and their derivatives can aid in design of new electrodes. Herein, saranchinaite Na2Cu(SO4)2 and its hydrated derivative krӧhnkite Na2Cu(SO4)2.2H2O bisulfate minerals have been prepared using a facile spray drying route for the first time. The phase stability relation during (de)hydration process was examined synergising in-situ X-ray diffraction and thermochemical studies. Krӧhnkite forms the thermodynamically stable phase as the hydration of saranchinaite to krӧhnkite is highly exothermic (-51.51 ± 0.63 KJ/mol). Structurally, kröhnkite offers a facile 2D pathways for Na+ ion migration resulting in 20 times higher total conductivity than saranchinaite at 60 °C. Both compounds exhibited conversion redox mechanism for Li-ion storage with first discharge capacity exceeding 650 mAh/g (at 2 mA/g vs. Li+/Li) upon discharge up to 0.05 V. Post-mortem analysis revealed the presence of metallic Cu in the discharged state is responsible for high irreversibility during galvanostatic cycling. This study reaffirms the exploration of Cu-based polyanionic sulfates, while having limited (de)insertion property, can be harnessed for conversion-based electrode materials for batteries.

Domaines

Chimie Matériaux
Fichier principal
Vignette du fichier
Singh et al_Saranchinaite-Krohnkite_Dalton Trans_2022.pdf (2.67 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04040366 , version 1 (22-03-2023)

Identifiants

Citer

Shashwat Singh, Audric Neveu, K. Jayanthi, Tisita Das, Sudip Chakraborty, et al.. Facile Synthesis and Phase Stability of Cu-based Na 2 Cu(SO 4 ) 2 .xH 2 O (x = 0-2) Sulfate Minerals as Conversion type Battery Electrodes. Dalton Transactions, 2022, 51 (29), pp.11169. ⟨10.1039/D2DT01830F⟩. ⟨hal-04040366⟩
27 Consultations
99 Téléchargements

Altmetric

Partager

More