Advancing lithium-sulfur battery technology: Research on doped ZnO modified membranes.
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| Title: | Advancing lithium-sulfur battery technology: Research on doped ZnO modified membranes. |
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| Authors: | Cao, Ziyi1 (AUTHOR), Qiu, Xianglin1 (AUTHOR), Zhang, Tianshuo1 (AUTHOR), Tang, Guofeng1 (AUTHOR), Hua, Chenghao1 (AUTHOR), Gao, Shanshan1,2 (AUTHOR) gaoshanshan111@163.com, Chen, Fushan1 (AUTHOR), Song, Xiaoming1,3 (AUTHOR) xiaomingsong4007@163.com |
| Source: | Materials Research Bulletin. Jun2024, Vol. 174, pN.PAG-N.PAG. 1p. |
| Subjects: | Lithium sulfur batteries, Zinc oxide films, Polysulfides, Ion channels, Zinc oxide, Electric batteries, Dendritic crystals, Short circuits |
| Abstract: | • Effectively inhibits the growth of lithium dendrites and improves battery safety. • Well suppressed the shuttling effect of polysulfides. • Higher discharge capacity and better cycle stability. • The capacity attenuation of each cycle is only 0.085 %. In lithium-sulfur batteries(LSB), the diaphragm is a crucial component that provides channels for lithium ion transport and prevents internal short circuits. However, commercial diaphragms such as polyethylene and polypropylene and their composites need better thermal stability, low mechanical strength, and limited electrolyte wettability. They are prone to shrinking and puncturing at high temperatures, leading to severe consequences. To address this issue, aramid nanofiber (ANF) was modified, and a novel membrane was prepared using the sol-gel method. When the current density is 0.1 C, the initial discharge capacity of the battery is 960 mg−1, compared with 835 mg−1 for the PP film. After 100 cycles, the battery maintains a specific capacity of 575 mg−1, with a decay rate of 0.4 % per cycle and a coulomb efficiency of 99.7 %. ZnO modified films with high performance were prepared by doping nanometer ZnO particles. The addition of ZnO nanoparticles hinders the regeneration of ANF hydrogen bonds to a certain extent and reduces the mechanical strength of the film, but it is still stronger than the commercial PP diaphragm, this can effectively inhibit the growth of lithium dendrites and improve the safety of the battery. [Display omitted] [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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