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A thermally etched N-doped porous layered silicon anode for improved cycling stability of lithium-ion batteries.
- Source :
- Journal of Materials Chemistry C; 10/21/2023, Vol. 11 Issue 39, p13466-13475, 10p
- Publication Year :
- 2023
-
Abstract
- The development of advanced porous silicon-based materials for lithium-ion battery anodes, which can accommodate the expansion of electrodes during cycling, is necessary to enhance cyclability. In this study, a metal oxide-based thermal etching method, to fabricate N-doped porous layered silicon nanoflakes (P-Si NFs), is proposed. It is carried out by in situ growth of metal oxide (Fe) precursors on siloxene (Si NFs), followed by thermal etching and acid treatment. It is noteworthy that P-Si NFs retain the 2D lamellar structure of Si NFs, and the N-doped porous surface structure can effectively alleviate volume expansion during cycling and improve the efficiency of lithium-ion transport and diffusion. As a result, 89.6% (∼581 mA h g<superscript>−1</superscript>) of the maximum capacity (648 mA h g<superscript>−1</superscript>) was maintained after 500 cycles at 2 A g<superscript>−1</superscript>. The coulombic efficiency remained close to 100%, indicating good cycling stability of the P-Si NF anode. This work provides important insights into the design of silicon-based anodes for high-performance lithium-ion batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 11
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 172960669
- Full Text :
- https://doi.org/10.1039/d3tc02218h