@article{078c0b872af540f198b4e7d279b08a40,
title = "Stable silicon-ionic liquid interface for next-generation lithium-ion batteries",
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.",
author = "Piper, {Daniela Molina} and Tyler Evans and Kevin Leung and Tylan Watkins and Jarred Olson and Kim, {Seul Cham} and Han, {Sang Sub} and Vinay Bhat and Oh, {Kyu Hwan} and Daniel Buttry and Lee, {Se Hee}",
note = "Funding Information: This work is funded by Boulder Ionics Corporation through the Membrane Science, Engineering and Technology (MAST) Center at CU-Boulder, an NSF Industry- University Cooperative Research Center. This material is based pon work supported by the National Science Foundation under Grant No. IIP-1152040. This work was also supported by the National Science Foundation (NSF, CHE-1231048), by a grant from the Fundamental R&D Program for Technology of World Premier Materials funded by the Ministry of Knowledge Economy, Republic of Korea (10037919) and by the Research Institute of Advanced Materials (RIAM). Work at ASU was supported by Army Research Office grant number W911NF-11-1-0432. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy{\textquoteright}s National Nuclear Security Administration under contract DE-AC04-94AL85000. Funding Information: D.M.P. and T.E. contributed equally to this work carrying out experiments, analysing and discussing data, and writing the manuscript; K.L. was supported by Sandia{\textquoteright}s Laboratory Directed Research and Development program conducting MD simulations, and discussing and writing the MD section of the manuscript; T.W. and J.O. performed QCM, and discussed the QCM section of the manuscript under the guidance and mentoring of D.A.B.; S.C.K. and S.S.H performed FIB, HRTEM and EELS under the guidance and mentoring of K.H.O.; V.B. discussed data and provided technical support; S.-H.L. guided and mentored the whole study and the preparation of the manuscript. Publisher Copyright: {\textcopyright} 2015 Macmillan Publishers Limited. All rights reserved.",
year = "2015",
month = feb,
day = "25",
doi = "10.1038/ncomms7230",
language = "English (US)",
volume = "6",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
}