Wang, Zhiguo, Li, Zhijie and Fu, Yong Qing (2017) Composites of Piezoelectric Materials and Silicon as Anode for Lithium Ion Batteries. ChemElectroChem. ISSN 2196-0216
|
Text
Revison_celc.201700043.pdf - Accepted Version Download (381kB) | Preview |
Abstract
Group IVA elements (Si, Ge and Sn) are promising candidates for the anode materials of lithium ion batteries (LIBs) due to their large theoretical specific capacities. However, serious problems of pulverization and capacity degradation resulted from the huge volume changes during charge/discharge operations hindered their successful applications as the anode materials in the LIBs. In this work, diffusion behaviors of Li ions in Si(100) and Si(111) slabs with a piezoelectric field applied perpendicularly to the surfaces were investigated using density functional theory. Results showed that the diffusivity of the Li in Si can be significantly enhanced by applying the electric field generated from the piezoelectric material. This finding can explain well the recent experimental observations in which improved electrochemical performance was obtained using Si/carbon nanotube/BaTiO3 as the anode for the LIBs. New generation of anode composite materials can be designed based on this idea and the piezoelectric material is used not only to accommodate the volume variation of active materials of Si, but also to enhance the charging rate of the LIBs.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | Piezoelectric material, Si anode, Lithium ion batteries, Density functional theory |
Subjects: | F200 Materials Science |
Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
Depositing User: | Becky Skoyles |
Date Deposited: | 24 Mar 2017 08:51 |
Last Modified: | 01 Aug 2021 08:37 |
URI: | http://nrl.northumbria.ac.uk/id/eprint/30181 |
Downloads
Downloads per month over past year