Arrêt de service programmé du vendredi 10 juin 16h jusqu’au lundi 13 juin 9h. Pour en savoir plus
Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Quantitatively Designing Porous Copper Current Collectors for Lithium Metal Anodes

Abstract : Lithium metal has been an attractive candidate as a next-generation anode material. Despite its popularity, stability issues of lithium in the liquid electrolyte and the formation of lithium whiskers have kept it from practical use. Three-dimensional (3D) current collectors have been proposed as an effective method to mitigate whisker growth. Although extensive research has been done, the effects of three key parameters of the 3D current collectors, namely, the surface area, the tortuosity factor, and the surface chemistry, on the performance of lithium metal batteries remain elusive. Herein, we quantitatively studied the role of these three parameters by synthesizing four types of porous copper networks with different sizes of well-structured microchannels. X-ray microscale computed tomography (micro-CT) allowed us to assess the surface area, the pore size, and the tortuosity factor of the porous copper materials. A metallic Zn coating was also applied to study the influence of surface chemistry on the performance of the 3D current collectors. The effects of these parameters on the performance were studied in detail through scanning electron microscopy (SEM) and titration gas chromatography (TGC). Stochastic simulations further allowed us to interpret the role of the tortuosity factor in lithiation. The optimal range of the key parameters is thereby found for the porous coppers and their performance is predicted. Using these parameters to inform the design of porous copper anodes for Li deposition, Coulombic efficiencies (CEs) of up to 99.63% are achieved, thus paving the way for the design of effective 3D current collector systems.
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées

https://hal-u-picardie.archives-ouvertes.fr/hal-03610981
Contributeur : Louise Dessaivre Connectez-vous pour contacter le contributeur
Soumis le : mercredi 16 mars 2022 - 17:32:13
Dernière modification le : mercredi 27 avril 2022 - 04:02:43

Lien texte intégral

Identifiants

Citation

Bingyu Lu, Edgar Olivera, Jonathan Scharf, Mehdi Chouchane, Chengcheng Fang, et al.. Quantitatively Designing Porous Copper Current Collectors for Lithium Metal Anodes. ACS APPLIED ENERGY MATERIALS, 2021, 4 (7), pp.6454-6465. ⟨10.1021/acsaem.1c00438⟩. ⟨hal-03610981⟩

Partager

Métriques

Consultations de la notice

18