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High-performance anodes of Si@B-C/rGO nanoparticles for liquid and all-solid-state lithium-ion batteries.
- Source :
-
Journal of Alloys & Compounds . May2024, Vol. 983, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Silicon is regarded as one of the most prospective anode candidates for the new generation of lithium ion batteries, because of its high theoretical specific capacity. Nevertheless, the huge expansion/contraction of silicon during cycling leads to rapid capacity decay. Herein, to suppress the concomitant mechanical damage, a composite material Si@B-C/rGO is prepared by in-situ encapsulating Si particles inside boron-doped carbon skeleton (B-C) and then loaded on reduced graphene oxide (rGO). The specific capacity of Si@B-C/rGO materials maintain at 1600 and 956 mAh g−1 after 100 cycles in liquid-phase and all-solid-state batteries, respectively. The performance improvement could be ascribed to main factors below: (i) The carbon shell significantly relieves expansion/contraction of silicon nanoparticles; (ii) The boron doping is conducive to the insertion/extraction of lithium-ions, because boron atoms have stronger affinity to lithium-ions than carbon; (iii) Loading Si@B-C nanoparticles on rGO can reduce particle agglomeration, and rGO provides a conductive network that ensures the transmission of lithium-ions. This work gives valuable reference to the design of advanced silicon-based anode materials to develop liquid and all-solid-state lithium-ion batteries. [Display omitted] • Si@B-C/rGO is prepared by in-situ encapsulating Si inside boron-doped carbon skeleton then loaded on reduced graphene oxide. • The introduction of boron into the carbon enhances Li+ adsorption and insertion behaviors, as verified by VASP calculations. • Loading Si@B-C nanoparticles on rGO can provides a conductive network that ensures the transmission of lithium-ions. • In liquid-phase and all-solid-state lithium-ion batteries, Si@B-C/rGO displays outstanding electrochemical performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 983
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 175696916
- Full Text :
- https://doi.org/10.1016/j.jallcom.2024.173919