Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications
Using Si as anode materials for Li-ion batteries remain challenging due to its morphological evolution and SEI modification upon cycling. The present work aims at developing a composite consisting of carbon-coated Si nanoparticles (Si@C NPs) intimately embedded in a three-dimensional (3D) graphene h...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/6/2451 |
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| author | Adrien Mery Yves Chenavier Coralie Marcucci Anass Benayad John P. Alper Lionel Dubois Cédric Haon Nathalie Herlin Boime Saïd Sadki Florence Duclairoir |
| author_facet | Adrien Mery Yves Chenavier Coralie Marcucci Anass Benayad John P. Alper Lionel Dubois Cédric Haon Nathalie Herlin Boime Saïd Sadki Florence Duclairoir |
| author_sort | Adrien Mery |
| collection | DOAJ |
| description | Using Si as anode materials for Li-ion batteries remain challenging due to its morphological evolution and SEI modification upon cycling. The present work aims at developing a composite consisting of carbon-coated Si nanoparticles (Si@C NPs) intimately embedded in a three-dimensional (3D) graphene hydrogel (GHG) architecture to stabilize Si inside LiB electrodes. Instead of simply mixing both components, the novelty of the synthesis procedure lies in the in situ hydrothermal process, which was shown to successfully yield graphene oxide reduction, 3D graphene assembly production, and homogeneous distribution of Si@C NPs in the GHG matrix. Electrochemical characterizations in half-cells, on electrodes not containing additional conductive additive, revealed the importance of the protective C shell to achieve high specific capacity (up to 2200 mAh.g<sup>−1</sup>), along with good stability (200 cycles with an average Ceff > 99%). These performances are far superior to that of electrodes made with non-C-coated Si NPs or prepared by mixing both components. These observations highlight the synergetic effects of C shell on Si NPs, and of the single-step in situ preparation that enables the yield of a Si@C-GHG hybrid composite with physicochemical, structural, and morphological properties promoting sample conductivity and Li-ion diffusion pathways. |
| first_indexed | 2024-03-11T06:14:47Z |
| format | Article |
| id | doaj.art-b525719fefa34acfbc2f974791b119e3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T06:14:47Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b525719fefa34acfbc2f974791b119e32023-11-17T12:22:28ZengMDPI AGMaterials1996-19442023-03-01166245110.3390/ma16062451Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery ApplicationsAdrien Mery0Yves Chenavier1Coralie Marcucci2Anass Benayad3John P. Alper4Lionel Dubois5Cédric Haon6Nathalie Herlin Boime7Saïd Sadki8Florence Duclairoir9Université Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, F-38000 Grenoble, FranceUniversité Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, F-38000 Grenoble, FranceUniversité Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, F-38000 Grenoble, FranceUniversité Grenoble Alpes, CEA, LITEN, DTNM, F-38054 Grenoble, FranceUniversité Paris Saclay, IRAMIS, UMR NIMBE, CEA Saclay, F-91191 Gif-sur-Yvette, CEDEX, FranceUniversité Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, F-38000 Grenoble, FranceUniversité Grenoble Alpes, CEA, LITEN, DEHT, F-38054 Grenoble, FranceUniversité Paris Saclay, IRAMIS, UMR NIMBE, CEA Saclay, F-91191 Gif-sur-Yvette, CEDEX, FranceUniversité Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, F-38000 Grenoble, FranceUniversité Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, F-38000 Grenoble, FranceUsing Si as anode materials for Li-ion batteries remain challenging due to its morphological evolution and SEI modification upon cycling. The present work aims at developing a composite consisting of carbon-coated Si nanoparticles (Si@C NPs) intimately embedded in a three-dimensional (3D) graphene hydrogel (GHG) architecture to stabilize Si inside LiB electrodes. Instead of simply mixing both components, the novelty of the synthesis procedure lies in the in situ hydrothermal process, which was shown to successfully yield graphene oxide reduction, 3D graphene assembly production, and homogeneous distribution of Si@C NPs in the GHG matrix. Electrochemical characterizations in half-cells, on electrodes not containing additional conductive additive, revealed the importance of the protective C shell to achieve high specific capacity (up to 2200 mAh.g<sup>−1</sup>), along with good stability (200 cycles with an average Ceff > 99%). These performances are far superior to that of electrodes made with non-C-coated Si NPs or prepared by mixing both components. These observations highlight the synergetic effects of C shell on Si NPs, and of the single-step in situ preparation that enables the yield of a Si@C-GHG hybrid composite with physicochemical, structural, and morphological properties promoting sample conductivity and Li-ion diffusion pathways.https://www.mdpi.com/1996-1944/16/6/2451silicon-based compositeSi nanoparticlescarbon-coatinggrapheneLi-ion batteryhydrothermal synthesis |
| spellingShingle | Adrien Mery Yves Chenavier Coralie Marcucci Anass Benayad John P. Alper Lionel Dubois Cédric Haon Nathalie Herlin Boime Saïd Sadki Florence Duclairoir Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications Materials silicon-based composite Si nanoparticles carbon-coating graphene Li-ion battery hydrothermal synthesis |
| title | Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications |
| title_full | Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications |
| title_fullStr | Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications |
| title_full_unstemmed | Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications |
| title_short | Toward the Improvement of Silicon-Based Composite Electrodes via an In-Situ Si@C-Graphene Composite Synthesis for Li-Ion Battery Applications |
| title_sort | toward the improvement of silicon based composite electrodes via an in situ si c graphene composite synthesis for li ion battery applications |
| topic | silicon-based composite Si nanoparticles carbon-coating graphene Li-ion battery hydrothermal synthesis |
| url | https://www.mdpi.com/1996-1944/16/6/2451 |
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