Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries
The demand for high-energy lithium-ion batteries (LIBs) has been rising exponentially. Silicon (Si) is gaining increased attention and popularity as an anode material due to its high theoretical capacity (4200 mAhg−1, Li4.4Si) and ample abundance, but the huge volume expansion of Si restricts its us...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123023004656 |
| _version_ | 1797682441245163520 |
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| author | Rohit Choudhury Narendra Kurra Praveen Meduri |
| author_facet | Rohit Choudhury Narendra Kurra Praveen Meduri |
| author_sort | Rohit Choudhury |
| collection | DOAJ |
| description | The demand for high-energy lithium-ion batteries (LIBs) has been rising exponentially. Silicon (Si) is gaining increased attention and popularity as an anode material due to its high theoretical capacity (4200 mAhg−1, Li4.4Si) and ample abundance, but the huge volume expansion of Si restricts its use in practical applications. Herein, we propose a composite consisting of nitrogen (N) and phosphorus (P) doped micron Si/graphite with vanadium carbide (V2C) MXene, which effectively helps to buffer the mechanical stresses initiated by the volume expansion of Si. The lithium storage specific capacity of the composite is 2003 mAhg−1 (based on the weight of Si) after a long-term cycling of 500 cycles (1C rate) along with a good high rate performance. The improved performance of the composite electrode can be attributed to V2C as well as N/P doping, which significantly enhance the electron/ion conduction pathways. Also, low-cost micron Si can provide high tap density in practical applications where volumetric performance is desired. Thus, this work provides an approach to develop high-performance micron Si-based materials for LIBs. |
| first_indexed | 2024-03-11T23:59:44Z |
| format | Article |
| id | doaj.art-102f8c39e5cd43acb3da18f2344c91a5 |
| institution | Directory Open Access Journal |
| issn | 2590-1230 |
| language | English |
| last_indexed | 2024-03-11T23:59:44Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj.art-102f8c39e5cd43acb3da18f2344c91a52023-09-18T04:30:48ZengElsevierResults in Engineering2590-12302023-09-0119101338Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteriesRohit Choudhury0Narendra Kurra1Praveen Meduri2Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502284, Telangana State, IndiaDepartment of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502284, Telangana State, IndiaDepartment of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502284, Telangana State, India; Corresponding author.The demand for high-energy lithium-ion batteries (LIBs) has been rising exponentially. Silicon (Si) is gaining increased attention and popularity as an anode material due to its high theoretical capacity (4200 mAhg−1, Li4.4Si) and ample abundance, but the huge volume expansion of Si restricts its use in practical applications. Herein, we propose a composite consisting of nitrogen (N) and phosphorus (P) doped micron Si/graphite with vanadium carbide (V2C) MXene, which effectively helps to buffer the mechanical stresses initiated by the volume expansion of Si. The lithium storage specific capacity of the composite is 2003 mAhg−1 (based on the weight of Si) after a long-term cycling of 500 cycles (1C rate) along with a good high rate performance. The improved performance of the composite electrode can be attributed to V2C as well as N/P doping, which significantly enhance the electron/ion conduction pathways. Also, low-cost micron Si can provide high tap density in practical applications where volumetric performance is desired. Thus, this work provides an approach to develop high-performance micron Si-based materials for LIBs.http://www.sciencedirect.com/science/article/pii/S2590123023004656Silicon anodeVanadium carbideMXeneGraphitePhosphorus dopingNitrogen doping |
| spellingShingle | Rohit Choudhury Narendra Kurra Praveen Meduri Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries Results in Engineering Silicon anode Vanadium carbide MXene Graphite Phosphorus doping Nitrogen doping |
| title | Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries |
| title_full | Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries |
| title_fullStr | Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries |
| title_full_unstemmed | Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries |
| title_short | Doped micro-silicon and vanadium carbide MXene composite as anode for high stability and high capacity Li-ion batteries |
| title_sort | doped micro silicon and vanadium carbide mxene composite as anode for high stability and high capacity li ion batteries |
| topic | Silicon anode Vanadium carbide MXene Graphite Phosphorus doping Nitrogen doping |
| url | http://www.sciencedirect.com/science/article/pii/S2590123023004656 |
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