@article{d788e46c4a6d4209b1f3ba759b3574ff,
title = "Controlling expansion in lithium manganese oxide composite electrodes via surface modification",
abstract = "Electrodes experience significant mechanical degradation at fast charging/discharging rates, ultimately leading to particle fracture and capacity loss. In this work, we investigate the role of an Au surface coating on the intercalation-induced strain changes in lithium manganese oxide (LiMn2O4, LMO) composite cathode electrodes. In-situ strain measurements are performed on free-standing composite electrodes to monitor lithium intercalation-induced deformations in the electrode. Interestingly, expansion in the Aucoated LMO electrodes are significantly smaller than LMO electrodes (without coating) at faster scan rates. Strain evolution is predicted based on elastic properties of the composite electrode and the intercalation-induced crystal structure changes in the LMO particles. Our results reveal that expansion can be controlled through coatings, suggesting promising material-based strategies to improve lifetime and performance of the batteries.",
author = "{\c C}apraz and S. Rajput and Bassett, {K. L.} and Gewirth, {A. A.} and White, {S. R.} and Sottos, {N. R.}",
note = "Funding Information: This work was supported as part of the Center for Electrochemical Energy Science, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. The authors would also like to acknowledge the Beckman Institute for Advanced Science and Technology for use of microscopy equipment and Dr. Joseph Lyding for use of spot welding equipment. {\"O}. {\"O}. {\c C}, S. R. W. and N. R. S. conceived the idea and supervised the work. {\"O}. {\"O}. {\c C} and N. R. S. designed the experiments and wrote the paper. K. L. B. showed {\"O}. {\"O}. {\c C}. and S. R. how to perform electroless deposition. S. R. produced Au-coated LMO powders. {\"O}. {\"O}. {\c C}. performed in situ strain measurements and analytical model. {\"O}. {\"O}. {\c C}. and S. R. performed impedance measurements and analyzed impedance data. All authors discussed the results. The authors declare that they have no competing interests. All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors. Publisher Copyright: {\textcopyright} 2019 The Electrochemical Society.",
year = "2019",
doi = "10.1149/2.0021912jes",
language = "English (US)",
volume = "166",
pages = "A2357--A2362",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "12",
}