Dual cation- and anion-based redox process in lithium titanium oxysulfide thin film cathodes
SOULÉ, Samantha
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
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Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
SOULÉ, Samantha
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
MARTINEZ, Hervé
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
LE CRAS, Frédéric
Commissariat à l'énergie atomique et aux énergies alternatives [CEA]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
< Reduce
Commissariat à l'énergie atomique et aux énergies alternatives [CEA]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Language
en
Article de revue
This item was published in
ACS Applied Materials & Interfaces. 2017, vol. 9, n° 3, p. 2275-2284
Washington, D.C. : American Chemical Society
English Abstract
A dual redox process involving Ti3+/Ti4+ cation species and S2–/(S2)2– anion species is highlighted in oxygenated lithium titanium sulfide thin film electrodes during lithium (de)insertion, leading to a high specific ...Read more >
A dual redox process involving Ti3+/Ti4+ cation species and S2–/(S2)2– anion species is highlighted in oxygenated lithium titanium sulfide thin film electrodes during lithium (de)insertion, leading to a high specific capacity. These cathodes for all-solid-state lithium-ion microbatteries are synthesized by sputtering of LiTiS2 targets prepared by different means. The limited oxygenation of the films that is induced during the sputtering process favors the occurrence of the S2–/(S2)2– redox process at the expense of the Ti3+/Ti4+ one during the battery operation, and influences its voltage profile. Finally, a perfect reversibility of both electrochemical processes is observed, whatever the initial film composition. All-solid-state lithium microbatteries using these amorphous lithiated titanium disulfide thin films and operated between 1.5 and 3.0 V/Li+/Li deliver a greater capacity (210–270 mAh g–1) than LiCoO2, with a perfect capacity retention (−0.0015% cycle–1).Read less <
English Keywords
disulfide pairs
titanium sulfide
thin films
all-solid-state lithium batteries
LiTiS 2
Origin
Hal imported