Dual chemifunctional tin(IV) oxide/nanoperforated graphene interlayer as a polysulfide adsorbent for use in high-performance lithium-sulfur batteries
- Authors
- Lee, Junho; Hwang, Sang Yeop; Il Oh, Byeong; Jeon, Young Gyu; Jung, Nae Yeon; Ahn, Wook; Lim, Hyung-Kyu; Kim, Hyun-Kyung
- Issue Date
- Jan-2024
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Tin oxide nanoparticle; Reduced graphene oxide; Lithium-sulfur battery; Electrochemical performance; Chemical function; Polysulfide adsorption
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.480
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 480
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/25953
- DOI
- 10.1016/j.cej.2023.147996
- ISSN
- 1385-8947
1873-3212
- Abstract
- The development of Li-S batteries is limited by their levels of rapid capacity decay owing to polysulfide dissolution and diffusion in organic electrolytes. We addressed this critical issue by fabricating a dual chemifunctional interlayer comprising SnO2 nanoparticles and nanoperforated graphene (NPG) that could function as a polysulfide adsorbent. The synergistic effects of SnO2 and the high-density functional groups of NPG on polysulfide capture were conceptually confirmed. NPG not only supported the adsorption of Li polysulfides but also provided pathways for simple Li-ion motion within the SnO2/NPG interlayer. A cell assembled with the SnO2/NPG interlayer displayed a high rate capability and initial discharge capacity and good reversible capacity. The excellent high-rate cycling performance of the cathode could mainly be attributed to the strong chemical bonds formed between SnO2/NPG and the polysulfides, rapid electron transfer, and optimized ion diffusion pathways derived from the well-organized structure of the composite. Synthesizing dual chemifunctional interlayers using a composite of metal oxides and NPG may lead to the development of advanced Li-S batteries with numerous practical applications in the near future.
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