Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

Daniela Molina Piper, Tyler Evans, Kevin Leung, Tylan Watkins, Jarred Olson, Seul Cham Kim, Sang Sub Han, Vinay Bhat, Kyu Hwan Oh, Daniel A. Buttry and Se-Hee Lee ()
Additional contact information
Daniela Molina Piper: University of Colorado at Boulder
Tyler Evans: University of Colorado at Boulder
Kevin Leung: Sandia National Laboratories
Tylan Watkins: Arizona State University
Jarred Olson: Boulder Ionics Corporation
Seul Cham Kim: Seoul National University
Sang Sub Han: Seoul National University
Vinay Bhat: Boulder Ionics Corporation
Kyu Hwan Oh: Seoul National University
Daniel A. Buttry: Arizona State University
Se-Hee Lee: University of Colorado at Boulder

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: Abstract We are currently in the midst of a race to discover and develop new battery materials capable of providing high energy-density at low cost. By combining a high-performance Si electrode architecture with a room temperature ionic liquid electrolyte, here we demonstrate a highly energy-dense lithium-ion cell with an impressively long cycling life, maintaining over 75% capacity after 500 cycles. Such high performance is enabled by a stable half-cell coulombic efficiency of 99.97%, averaged over the first 200 cycles. Equally as significant, our detailed characterization elucidates the previously convoluted mechanisms of the solid-electrolyte interphase on Si electrodes. We provide a theoretical simulation to model the interface and microstructural-compositional analyses that confirm our theoretical predictions and allow us to visualize the precise location and constitution of various interfacial components. This work provides new science related to the interfacial stability of Si-based materials while granting positive exposure to ionic liquid electrochemistry.

Date: 2015
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/ncomms7230 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7230

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms7230

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().