DOE OSTI · 3022504
Anode-less Solid-State Li–S Batteries Enabled by Fe-Stabilized Polysulfides
Abstract
Anode-less solid-state lithium-sulfur batteries (SSLSBs) with lithium sulfide (Li 2 S) as the cathode promise a high energy density and ease of manufacturing. However, Li 2 S is plagued by poor conductivity, sluggish activation kinetics, and a poor cycle life. Here, in this study, we report an FeCl 3 -activated Li 2 S (FLS) cathode with solid-state polysulfide intermediates generated through a redox reaction between FeCl 3 and Li 2 S. This strategy is shown to boost the electrical conductivity of Li 2 S by 7 orders of magnitude and lower the activation barrier. During cycling, Fe plays a significant role in stabilizing the highly active polysulfide species, contributing to the exceptional electrochemical performance. The FLS cathode achieves 80% capacity retention over 500 cycles with >99% Li 2 S utilization. Furthermore, a Li-metal-free (anode-less) full cell retained over 80% of its initial capacity after 240 cycles. This work underscores the promise of leveraging Fe-stabilized polysulfides in enabling high-energy, long-lasting, solid-state Li-S batteries.
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Feng, Shijie [Univ. of California, San Diego, CA (United States)] (ORCID:0000000157978542), Tan, Sha [Brookhaven National Laboratory (BNL), Upton, NY (United States)], Liu, Mengchen [Univ. of California, San Diego, CA (United States)], Jia, Yinglu [Univ. of California, San Diego, CA (United States)], Zhou, Ke [Univ. of California, San Diego, CA (United States)], Yan, Wenlin [Univ. of California, San Diego, CA (United States)], Li, Wan-Lu [Univ. of California, San Diego, CA (United States)] (ORCID:0000000300980670), Brooks, Christopher [Honda Research Institute USA, Columbus, OH (United States). 99P Laboratories], Zhou, Jianbin [Univ. of California, San Diego, CA (United States)], Hu, Enyuan [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000218814534), Liu, Ping [Univ. of California, San Diego, CA (United States)] (ORCID:0000000214881668). 2026-03-05. Anode-less Solid-State Li–S Batteries Enabled by Fe-Stabilized Polysulfides. https://doi.org/10.1021/acsenergylett.6c00012
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