Exploring the bottlenecks of anionic redox in Li-rich layered sulfides

Sujoy Saha, Gaurav Assat, Moulay Tahar Sougrati, Dominique Foix, Haifeng Li, Jean Vergnet, Soma Turi, Yang Ha, Wanli Yang, Jordi Cabana, Gwenaëlle Rousse, Artem M. Abakumov and Jean-Marie Tarascon ()
Additional contact information
Sujoy Saha: Collège de France, Chaire de Chimie du Solide et de l’Energie
Gaurav Assat: Collège de France, Chaire de Chimie du Solide et de l’Energie
Moulay Tahar Sougrati: Réseau sur le Stockage Electrochimique de l’Energie (RS2E)
Dominique Foix: Réseau sur le Stockage Electrochimique de l’Energie (RS2E)
Haifeng Li: University of Illinois at Chicago
Jean Vergnet: Collège de France, Chaire de Chimie du Solide et de l’Energie
Soma Turi: Collège de France, Chaire de Chimie du Solide et de l’Energie
Yang Ha: Advanced Light Source, Lawrence Berkeley National Laboratory
Wanli Yang: Advanced Light Source, Lawrence Berkeley National Laboratory
Jordi Cabana: University of Illinois at Chicago
Gwenaëlle Rousse: Collège de France, Chaire de Chimie du Solide et de l’Energie
Artem M. Abakumov: Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Jean-Marie Tarascon: Collège de France, Chaire de Chimie du Solide et de l’Energie

Nature Energy, 2019, vol. 4, issue 11, 977-987

Abstract: Abstract Anionic redox chemistry has emerged as a new paradigm to design higher-energy lithium ion-battery cathode materials such as Li-rich layered oxides. However, they suffer from voltage fade, large hysteresis and sluggish kinetics, which originate intriguingly from the anionic redox activity itself. To fundamentally understand these issues, we decided to act on the ligand by designing new Li-rich layered sulfides Li1.33 – 2y/3Ti0.67 – y/3FeyS2, among which the y = 0.3 member shows sustained reversible capacities of ~245 mAh g−1 due to cumulated cationic (Fe2+/3+) and anionic (S2−/Sn−, n

Date: 2019
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DOI: 10.1038/s41560-019-0493-0

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