Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries
Silicon, one of the most promising anodes, has been facing challenges to improve continuous increased electrode expansion during the cycles, resulting in a deteriorated conducting network between the particles from the accelerated side reactions with the electrolytes and inferior long-term cycle per...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-07-01
|
| Series: | Electrochemistry Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248122001370 |
| _version_ | 1828437579113955328 |
|---|---|
| author | Minki Jo Soojin Sim Juhyeong Kim Pilgun Oh Yoonkook Son |
| author_facet | Minki Jo Soojin Sim Juhyeong Kim Pilgun Oh Yoonkook Son |
| author_sort | Minki Jo |
| collection | DOAJ |
| description | Silicon, one of the most promising anodes, has been facing challenges to improve continuous increased electrode expansion during the cycles, resulting in a deteriorated conducting network between the particles from the accelerated side reactions with the electrolytes and inferior long-term cycle performance of the graphite counterpart for practical application. Herein, we demonstrated an easy and scalable synthesis of Si nanoparticles in the carbon-coated and interconnected α-FeSi2 matrix where α-FeSi2 acts as a buffer matrix for the expansion of adjacent Si, and the uniformly-coated carbon surface layer on the α-FeSi2 matrix enhances conductivity and reduces the side reaction of electrolyte and structural degradation. Our results reveal that the α-FeSi2/Si/carbon (FSC) exhibits better electrochemical properties in the lithium-ion cell compared to α-FeSi2/Si (FS), benchmarking samples of α-FeSi2/Si (BM-FS) and carbon nanotubes (CNTs) grown FS (BM-FS/CNT). The FSC anode in the full cell with the areal capacity and electrode density of anodes of 2.25 mAh cm−2 and 1.7 g cc−1, respectively, exhibited quite a comparable capacity retention to a graphite counterpart, showing 83 % at a rate of 0.7C charging /0.5C discharging rate between 4.4 and 3 V after 200 cycles. |
| first_indexed | 2024-12-10T19:48:00Z |
| format | Article |
| id | doaj.art-380ae99cbb404aa6807b4b7440ad34fc |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-12-10T19:48:00Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-380ae99cbb404aa6807b4b7440ad34fc2022-12-22T01:35:50ZengElsevierElectrochemistry Communications1388-24812022-07-01140107335Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteriesMinki Jo0Soojin Sim1Juhyeong Kim2Pilgun Oh3Yoonkook Son4Department of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, KoreaDepartment of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaDepartment of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, KoreaDepartment of Smart Green Technology Engineering, Pukyong National University, Busan 485471, Korea; Department of Nanotechnology Engineering, Pukyong National University, Busan 485471, KoreaDepartment of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, Korea; Corresponding author.Silicon, one of the most promising anodes, has been facing challenges to improve continuous increased electrode expansion during the cycles, resulting in a deteriorated conducting network between the particles from the accelerated side reactions with the electrolytes and inferior long-term cycle performance of the graphite counterpart for practical application. Herein, we demonstrated an easy and scalable synthesis of Si nanoparticles in the carbon-coated and interconnected α-FeSi2 matrix where α-FeSi2 acts as a buffer matrix for the expansion of adjacent Si, and the uniformly-coated carbon surface layer on the α-FeSi2 matrix enhances conductivity and reduces the side reaction of electrolyte and structural degradation. Our results reveal that the α-FeSi2/Si/carbon (FSC) exhibits better electrochemical properties in the lithium-ion cell compared to α-FeSi2/Si (FS), benchmarking samples of α-FeSi2/Si (BM-FS) and carbon nanotubes (CNTs) grown FS (BM-FS/CNT). The FSC anode in the full cell with the areal capacity and electrode density of anodes of 2.25 mAh cm−2 and 1.7 g cc−1, respectively, exhibited quite a comparable capacity retention to a graphite counterpart, showing 83 % at a rate of 0.7C charging /0.5C discharging rate between 4.4 and 3 V after 200 cycles.http://www.sciencedirect.com/science/article/pii/S1388248122001370α-FeSi2 anodeSi nanoparticlesLi-ion batteriesFull cellCarbon coating |
| spellingShingle | Minki Jo Soojin Sim Juhyeong Kim Pilgun Oh Yoonkook Son Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries Electrochemistry Communications α-FeSi2 anode Si nanoparticles Li-ion batteries Full cell Carbon coating |
| title | Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries |
| title_full | Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries |
| title_fullStr | Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries |
| title_full_unstemmed | Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries |
| title_short | Practical implantation of Si nanoparticles in Carbon-coated α-FeSi2 matrix for Lithium-ion batteries |
| title_sort | practical implantation of si nanoparticles in carbon coated α fesi2 matrix for lithium ion batteries |
| topic | α-FeSi2 anode Si nanoparticles Li-ion batteries Full cell Carbon coating |
| url | http://www.sciencedirect.com/science/article/pii/S1388248122001370 |
| work_keys_str_mv | AT minkijo practicalimplantationofsinanoparticlesincarboncoatedafesi2matrixforlithiumionbatteries AT soojinsim practicalimplantationofsinanoparticlesincarboncoatedafesi2matrixforlithiumionbatteries AT juhyeongkim practicalimplantationofsinanoparticlesincarboncoatedafesi2matrixforlithiumionbatteries AT pilgunoh practicalimplantationofsinanoparticlesincarboncoatedafesi2matrixforlithiumionbatteries AT yoonkookson practicalimplantationofsinanoparticlesincarboncoatedafesi2matrixforlithiumionbatteries |