Effectively suppressing dissolution of manganese from spinel lithium manganate via a nanoscale surface-doping approach

Title
Effectively suppressing dissolution of manganese from spinel lithium manganate via a nanoscale surface-doping approach
Author
선양국
Issue Date
2014-12
Publisher
Nature Publishing Group
Citation
Nature Communications, 2014, 5(5693), P.1-8
Abstract
The capacity fade of lithium manganate-based cells is associated with the dissolution of Mn from cathode/electrolyte interface due to the disproportionation reaction of Mn( III), and the subsequent deposition of Mn(II) on the anode. Suppressing the dissolution of Mn from the cathode is critical to reducing capacity fade of LiMn2O4-based cells. Here we report a nanoscale surface-doping approach that minimizes Mn dissolution from lithium manganate. This approach exploits advantages of both bulk doping and surface-coating methods by stabilizing surface crystal structure of lithium manganate through cationic doping while maintaining bulk lithium manganate structure, and protecting bulk lithium manganate from electrolyte corrosion while maintaining ion and charge transport channels on the surface through the electrochemically active doping layer. Consequently, the surface-doped lithium manganate demonstrates enhanced electrochemical performance. This study provides encouraging evidence that surface doping could be a promising alternative to improve the cycling performance of lithium-ion batteries.
URI
http://www.nature.com/articles/ncomms6693http://hdl.handle.net/20.500.11754/49444
ISSN
2041-1723
DOI
10.1038/ncomms6693
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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