Suppressing Li dendrite by a guar gum natural polymer film for high‐performance lithium metal anodes

Author:

Fei Guiqiang1,Du Yifan1,Liu Xuan1,Yin Zheng1,Shu Kewei1,Niu Huizhu1,Han Yun1,Wang Yu2,Liu Hui3ORCID,Wang Haihua14ORCID

Affiliation:

1. School of Chemistry and Chemical Engineering Shaanxi University of Science and Technology Xi'an China

2. Xi'an North Huian Chemical Industry Co Xi'an China

3. School of Materials Science and Engineering Shaanxi University of Science and Technology Xi'an China

4. Department of Materials Science and Engineering Korea University Seoul Republic of Korea

Abstract

AbstractLithium 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.

Publisher

Wiley

Subject

Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry

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