Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries
Abstract $$\hbox {SiO}_2$$ SiO 2 is a promising material for developing high-capacity anodes for lithium-ion batteries (LIBs). However, microstructural changes of $$\hbox {SiO}_2$$ SiO 2 anodes at the particle and electrode level upon prolonged cycling remains unclear. In this work, the causes leadi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-47355-7 |
| _version_ | 1797452591543615488 |
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| author | Weicheng Hua Inger-Emma Nylund Federico Cova Ann Mari Svensson Maria Valeria Blanco |
| author_facet | Weicheng Hua Inger-Emma Nylund Federico Cova Ann Mari Svensson Maria Valeria Blanco |
| author_sort | Weicheng Hua |
| collection | DOAJ |
| description | Abstract $$\hbox {SiO}_2$$ SiO 2 is a promising material for developing high-capacity anodes for lithium-ion batteries (LIBs). However, microstructural changes of $$\hbox {SiO}_2$$ SiO 2 anodes at the particle and electrode level upon prolonged cycling remains unclear. In this work, the causes leading to capacity fade on $$\hbox {SiO}_2$$ SiO 2 anodes were investigated and simple strategies to attenuate anode degradation were explored. Nanostructured $$\hbox {SiO}_2$$ SiO 2 from diatomaceous earth was integrated into anodes containing different quantities of conductive carbon in the form of either a conductive additive or a nanometric coating layer. Galvanostatic cycling was conducted for 200 cycles and distinctive trends on capacity fade were identified. A thorough analysis of the anodes at selected cycle numbers was performed using a toolset of characterization techniques, including electrochemical impedance spectroscopy, FIB-SEM cross-sectional analysis and TEM inspections. Significant fragmentation of $$\hbox {SiO}_2$$ SiO 2 particles surface and formation of filigree structures upon cycling are reported for the first time. Morphological changes are accompanied by an increase in impedance and a loss of electroactive surface area. Carbon-coating is found to restrict particle fracture and to increase capacity retention to 66%, compared to 47% for uncoated samples after 200 cycles. Results provide valuable insights to improve cycling stability of $$\hbox {SiO}_2$$ SiO 2 anodes for next-generation LIBs. |
| first_indexed | 2024-03-09T15:10:53Z |
| format | Article |
| id | doaj.art-7f532b485be74bb692d699a7e1242939 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T15:10:53Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-7f532b485be74bb692d699a7e12429392023-11-26T13:22:03ZengNature PortfolioScientific Reports2045-23222023-11-0113111210.1038/s41598-023-47355-7Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteriesWeicheng Hua0Inger-Emma Nylund1Federico Cova2Ann Mari Svensson3Maria Valeria Blanco4Department of Materials Science and Engineering, Norwegian University of Science and TechnologyDepartment of Materials Science and Engineering, Norwegian University of Science and TechnologyBL31 FaXToR Beamline, CELLS- ALBA Synchrotron Light SourceDepartment of Materials Science and Engineering, Norwegian University of Science and TechnologyDepartment of Materials Science and Engineering, Norwegian University of Science and TechnologyAbstract $$\hbox {SiO}_2$$ SiO 2 is a promising material for developing high-capacity anodes for lithium-ion batteries (LIBs). However, microstructural changes of $$\hbox {SiO}_2$$ SiO 2 anodes at the particle and electrode level upon prolonged cycling remains unclear. In this work, the causes leading to capacity fade on $$\hbox {SiO}_2$$ SiO 2 anodes were investigated and simple strategies to attenuate anode degradation were explored. Nanostructured $$\hbox {SiO}_2$$ SiO 2 from diatomaceous earth was integrated into anodes containing different quantities of conductive carbon in the form of either a conductive additive or a nanometric coating layer. Galvanostatic cycling was conducted for 200 cycles and distinctive trends on capacity fade were identified. A thorough analysis of the anodes at selected cycle numbers was performed using a toolset of characterization techniques, including electrochemical impedance spectroscopy, FIB-SEM cross-sectional analysis and TEM inspections. Significant fragmentation of $$\hbox {SiO}_2$$ SiO 2 particles surface and formation of filigree structures upon cycling are reported for the first time. Morphological changes are accompanied by an increase in impedance and a loss of electroactive surface area. Carbon-coating is found to restrict particle fracture and to increase capacity retention to 66%, compared to 47% for uncoated samples after 200 cycles. Results provide valuable insights to improve cycling stability of $$\hbox {SiO}_2$$ SiO 2 anodes for next-generation LIBs.https://doi.org/10.1038/s41598-023-47355-7 |
| spellingShingle | Weicheng Hua Inger-Emma Nylund Federico Cova Ann Mari Svensson Maria Valeria Blanco Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries Scientific Reports |
| title | Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries |
| title_full | Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries |
| title_fullStr | Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries |
| title_full_unstemmed | Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries |
| title_short | Insights on microstructural evolution and capacity fade on diatom $$\hbox {SiO}_2$$ SiO 2 anodes for lithium-ion batteries |
| title_sort | insights on microstructural evolution and capacity fade on diatom hbox sio 2 sio 2 anodes for lithium ion batteries |
| url | https://doi.org/10.1038/s41598-023-47355-7 |
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