In situ-constructed LixMoS2 with highly exposed interface boosting high-loading and long-life cathode for all-solid-state Li–S batteries

Li, Hao, Wang, Rui, Song, Jiangping, Liu, Dan, Gao, Hongyang, Chao, Yimin ORCID: https://orcid.org/0000-0002-8488-2690 and Tang, Haolin (2023) In situ-constructed LixMoS2 with highly exposed interface boosting high-loading and long-life cathode for all-solid-state Li–S batteries. Energy & Environmental Materials. ISSN 2575-0356

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Abstract

As the persistent concerns regarding sluggish reaction kinetics and insufficient conductivities of sulfur cathodes in all-solid-state Li–S batteries (ASSLSBs), numerous carbon additives and solid-state electrolytes (SSEs) have been incorporated into the cathode to facilitate ion/electron pathways around sulfur. However, this has resulted in a reduced capacity and decomposition of SSEs. Therefore, it is worth exploring neotype sulfur hosts with electronic/ionic conductivity in the cathode. Herein, we present a hybrid cathode composed of few-layered S/MoS2/C nanosheets (<5 layers) that exhibits high-loading and long-life performance without the need of additional carbon additives in advanced ASSLSBs. The multifunctional MoS2/C host exposes the abundant surface for intimate contacting sites, in situ-formed LixMoS2 during discharging as mixed ion/electron conductive network improves the S/Li2S conversion, and contributes extra capacity for the part of active materials. With a high active material content (S + MoS2/C) of 60 wt% in the S/MoS2/C/Li6PS5Cl cathode composite (the carbon content is only ~3.97 wt%), the S/MoS2/C electrode delivers excellent electrochemical performance, with a high reversible discharge capacity of 980.3 mAh g−1 (588.2 mAh g−1 based on the whole cathode weight) after 100 cycles at 100 mA g−1. The stable cycling performance is observed over 3500 cycles with a Coulombic efficiency of 98.5% at 600 mA g−1, while a high areal capacity of 10.4 mAh cm−2 is achieved with active material loading of 12.8 mg cm−2.

Item Type: Article
Additional Information: Research Funding: Province. Grant Number: 2021AAA006; National Key Research and Development Program of China. Grant Number: 2022YFB4003500; National Natural Science Foundation of China
Uncontrolled Keywords: all-solid-state lithium–sulfur batteries,intercalation,high-loading and long-life,low carbon content,electronic conductivities,renewable energy, sustainability and the environment,materials science(all),water science and technology,environmental science (miscellaneous),waste management and disposal,energy (miscellaneous) ,/dk/atira/pure/subjectarea/asjc/2100/2105
Faculty \ School: Faculty of Science > School of Chemistry
UEA Research Groups: Faculty of Science > Research Groups > Chemistry of Materials and Catalysis
Faculty of Science > Research Groups > Energy Materials Laboratory
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Depositing User: LivePure Connector
Date Deposited: 13 Dec 2023 02:01
Last Modified: 20 Dec 2023 02:57
URI: https://ueaeprints.uea.ac.uk/id/eprint/93973
DOI: 10.1002/eem2.12687

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