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Highly Efficient Organosulfur and Lithium-Metal Hosts Enabled by C@Fe3N Sponge |
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| Authors: | Dr. Jiarui He Dr. Amruth Bhargav Hyunki Sul Prof. Arumugam Manthiram |
| Affiliation: | 1. Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712 USA Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Investigation (equal), Methodology (lead), Validation (lead), Writing - original draft (lead);2. Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712 USA Contribution: Data curation (equal), Formal analysis (equal), Investigation (equal), Methodology (supporting), Validation (equal), Writing - review & editing (equal);3. Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712 USA Contribution: Data curation (supporting), Formal analysis (supporting), Methodology (supporting), Validation (supporting), Writing - review & editing (supporting);4. Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712 USA |
| Abstract: | Lithium-organosulfur (Li-OS) batteries, despite possessing high theoretical specific capacity, encounter a few practical challenges, including unsatisfactory lifespan and low active material utilization under realistic conditions. Here, diisoropyl xanthogen polysulfide (DIXPS) has been selected as a model organosulfur compound to investigate the practical feasibility of Li-OS batteries under realistic conditions. A well-designed freestanding carbon sponge decorated with Fe3N nanoparticles (C@Fe3N) is introduced into the Li-OS cells as a scaffold for both Li and DIXPS. The lithiophilic property of the C@Fe3N host guides uniform lithium deposition at the anode, and the catalysis of the DIXPS conversion reaction promotes the kinetics at the cathode. Impressively, the synergistic effect of C@Fe3N leads to an extremely stable cycling performance over 1 000 cycles in a Li-OS full cell under realistic conditions. |
| Keywords: | Electrochemistry Lithiophilic Host Lithium-Organosulfur Batteries Pouch Cells Shuttling-Free Cathode |