Issue 2, 2023

High-performance all-solid-state Li2S batteries using an interfacial redox mediator

Abstract

All-solid-state Li–S batteries based on lithium sulfide cathodes have generated much excitement as possible next-generation energy storage candidates because they can offer a high theoretical energy density exceeding that of lithium-ion batteries, and the possibility of “anode-less” cell designs. However, solid-state Li2S cathode kinetics are hindered by both limited ionic and electronic transport and a high activation barrier on charge. Here we report a Li2S/LiVS2 core–shell cathode architecture design, whereby the shell serves as both a charge-carrier transport vehicle and electron transfer mediator for Li2S during oxidation. With an argyrodite-type solid electrolyte, the solid-state Li2S cell exhibits very good rate capability up to 3 mA cm−2 at room temperature, and nearly 80% capacity retention up to 1000 cycles at a moderate current density of 1 mA cm−2. High active material loading (4 and 6 mg cm−2) is demonstrated in this configuration with stable capacity retention. High areal capacity up to 5.3 mA h cm−2 with a very high active material loading of 10 mg cm−2 is also reported, albeit with limited cycle life.

Graphical abstract: High-performance all-solid-state Li2S batteries using an interfacial redox mediator

Supplementary files

Article information

Article type
Paper
Submitted
12 okt 2022
Accepted
06 yan 2023
First published
06 yan 2023

Energy Environ. Sci., 2023,16, 610-618

High-performance all-solid-state Li2S batteries using an interfacial redox mediator

C. Y. Kwok, S. Xu, I. Kochetkov, L. Zhou and L. F. Nazar, Energy Environ. Sci., 2023, 16, 610 DOI: 10.1039/D2EE03297J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements