Affiliation: | 1. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China
Contribution: Funding acquisition (lead);2. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China
Contribution: Data curation (lead), Formal analysis (lead), Writing - original draft (lead);3. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China
Contribution: ?Investigation (lead);4. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China
Contribution: ?Investigation (equal);5. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China
Contribution: Methodology (equal);6. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China
Contribution: Data curation (lead);7. Xi'an North Huian Chemical Industry Co, Xi'an, China
Contribution: Data curation (lead);8. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an, China;9. School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, China |
Abstract: | Lithium dendrites pose a major hurdle for enhancing the energy density of lithium metal batteries, and the artificial solid electrolyte interface layer offers a potential solution. In this work, a cost-effective and environmentally friendly guar gum film is applied to the artificial protective layer. The guar gum artificial solid electrolyte interface (SEI) layer formed naturally, enriched with ? OH and ? AOA? groups, displayed exceptional electrochemical stability, and achieved an impressively high transference number of 0.88 for lithium-ion movement. In symmetric cells, the Li@GG-Cu anode displays remarkable cycling performance even during extended periods. This is evidenced by its ability to maintain a surface capacity of approximately 850 h (1 mA cm?2, 1 mAh cm?2). In addition, when utilizing a complete cell setup comprising a LiFPO4 cathode (weighing 1.5 mg cm?2) and anode coated with a guar gum film, the capacity retention of an impressive 96.2% showcases outstanding preservation of battery performance over time even after 700 cycles. This performance surpasses that of a lithium foil electrode (87.1%) and a copper anode with lithium deposition (0%). Our work exhibits a promising material for a novel configuration of artificial SEI, effectively stabilizing lithium metal anode. |