Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 32, Issue -, Pages 31-34Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2013.03.030
Keywords
Lithium-ion batteries; Manganese dissolution; Coating; Atomic layer deposition
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Ultrathin surface coatings (<5 nm) on electrodes have been developed to mitigate the capacity decay induced by manganese (Mn) dissolution, a limiting factor for Mn-based oxide electrode materials in lithium ion batteries. We demonstrated that the capacity decay was attributed to the Mn deposited on the graphite electrode accelerating the electrolyte decomposition. While the Al2O3 coating on the positive electrode suppressed the Mn dissolution, we found that the Al2O3 coating on the negative electrode was counter-intuitively more beneficial and efficient in preventing the Mn deposition and achieving excellent capacity retention in lithium ion batteries. (C) 2013 Elsevier B.V. All rights reserved.
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