Type I clathrates as novel silicon anodes: An electrochemical and structural investigation
- Arizona State Univ., Tempe, AZ (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Southwest Research Institute, San Antonio, TX (United States)
In this study, silicon clathrates contain cage-like structures that can encapsulate various guest atoms or molecules. Here we present an electrochemical evaluation of type I silicon clathrates based on Ba8AlySi46-y for the anode material in lithium-ion batteries. Post-cycling characterization with NMR and XRD show no discernible structural or volume changes even after electrochemical insertion of 44 Li into the clathrate structure. The observed properties are in stark contrast with lithiation of other silicon anodes, which become amorphous and suffer from larger volume changes. The lithiation/delithiation processes are proposed to occur in single phase reactions at approximately 0.2 and 0.4 V vs. Li/Li+, respectively, distinct from other diamond cubic or amorphous silicon anodes. Reversible capacities as high as 499 mAh g-1 at a 5 mA g-1 rate were observed for silicon clathrate with composition Ba8Al8.54Si37.46, corresponding to Li:Si of 1.18:1. The results show that silicon clathrates could be promising durable anodes for lithium-ion batteries.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1185934
- Journal Information:
- Advanced Science, Journal Name: Advanced Science Journal Issue: 6 Vol. 2; ISSN 2198-3844
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Surface Properties of Battery Materials Elucidated Using Scanning Electrochemical Microscopy: The Case of Type I Silicon Clathrate
|
journal | December 2019 |
Multifaceted Sn–Sn bonding in the solid state. Synthesis and structural characterization of four new Ca–Li–Sn compounds
|
journal | January 2019 |
Silicon clathrates for lithium ion batteries: A perspective
|
journal | December 2016 |
Similar Records
Anodes for Lithium-Ion Batteries Based on Type I Silicon Clathrate Ba8Al16Si30 - Role of Processing on Surface Properties and Electrochemical Behavior
Silicon clathrates for lithium ion batteries: A perspective
First Principles Simulations of the Electrochemical Lithiation and Delithiation of Faceted Crystalline Silicon
Journal Article
·
Wed Oct 04 20:00:00 EDT 2017
· ACS Applied Materials and Interfaces
·
OSTI ID:1470613
Silicon clathrates for lithium ion batteries: A perspective
Journal Article
·
Wed Dec 14 23:00:00 EST 2016
· Applied Physics Reviews
·
OSTI ID:22594456
First Principles Simulations of the Electrochemical Lithiation and Delithiation of Faceted Crystalline Silicon
Journal Article
·
Wed Sep 05 00:00:00 EDT 2012
· Journal of the American Chemical Society, 134(35):14362–14374
·
OSTI ID:1222155