Back to Search
Start Over
Improving electrochemical performance of Nano-Si/N-doped carbon through tunning the microstructure from two dimensions to three dimensions.
- Source :
-
Electrochimica Acta . Feb2020, Vol. 332, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Silicon-based anode for lithium-ion batteries (LIBs) has attracted much attention due to its high theoretical capacity, low operating potential and abundant resources. However, the large volume expansion/shrink during the lithiation/delithiation process induces extreme damage to the electrode microstructure. The resulting failure of electrical contact between silicon and current collector will severely deteriorate the cycling stability. Herein, a three-dimensional nano-Si/N-doped carbon network was obtained by a facile approach with NaCl templates. The N-doped carbon network not only significantly improves the electronic conductivity, but also ensures a valid electrode microstructure through a highly elastic carbon framework. Additionally, a two-dimensional nano-Si/N-doped carbon sheet was prepared without NaCl templates, revealing the boosting action of NaCl templates in the microstructure adjustment from low dimension to spatial crosslinking. The optimal three-dimensional nano-Si/N-doped carbon composite can deliver a high specific capacity of 1396 mAh g−1 with a capacity retention of 84.3% after 100 cycles at 200 mA g−1. This study provides effective guidance for novel Si-based anode design to achieve high-energy LIBs with excellent cycling stability. Image 1 [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITROGEN
*CARBON composites
*MICROSTRUCTURE
*CARBON
Subjects
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 332
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 141112204
- Full Text :
- https://doi.org/10.1016/j.electacta.2019.135507