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Silicon cages with tailored mesopores as anodes for high rate performance lithium ion batteries.
- Source :
-
Journal of Alloys & Compounds . Dec2020, Vol. 848, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Silicon (Si) with high energy density is identified as the most promising candidate for commercial lithium-ion batteries anodes. Unfortunately, the volume expansion severely damages the battery cycle life during cycling, resulting in fast capacity fading during the battery operation. Herein, a facile design was proposed for the preparation of novel tailored mesoporous Si cages (TMSC) to mitigate this issue. The TMSC material, with mesoporous anamorphic spherical shells and nano-sized Si cores, consists of numerous interconnected channels and forms a half open three-dimensional network. When evaluated as electrode material for lithium-ion batteries, it exhibits the reversible capacity of 931.1 mAh/g after 200 cycles at 1 A/g, which is more stable than that of Si pomegranates with intact shells. Moreover, it displays a high rechargeable capacity of 552.3 mA h/g over 500 cycles at 4 A/g and the capacity decay ratio is only 0.11% for each cycle. Image 1 • A novel kind of tailored mesoporous Si cages (TMSC) material was facile prepared. • The TMSC material demonstrates tailored mesopores on the shell and cross-linked Si nanoparticles in the core. • The TMSC electrode exhibits a high rate capability of 552.3 mA h/g over 500 cycles at 4 A/g. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LITHIUM-ion batteries
*ANODES
*ENERGY density
*SILICON
Subjects
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 848
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 145678444
- Full Text :
- https://doi.org/10.1016/j.jallcom.2020.156539