Mn(II) deposition on anodes and its effects on capacity fade in spinel lithium manganate-carbon systems

Title
Mn(II) deposition on anodes and its effects on capacity fade in spinel lithium manganate-carbon systems
Author
선양국
Keywords
LI-ION BATTERIES; TEMPERATURE CYCLING STABILITY; ELEVATED-TEMPERATURE; CATHODE MATERIALS; GRAPHITE ANODES; LIMN2O4 CATHODE; ELECTROLYTE; CELLS; PERFORMANCE; IMPEDANCE
Issue Date
2013-09
Publisher
NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Citation
NATURE COMMUNICATIONS,v.4 ,p2437
Abstract
Dissolution and migration of manganese from cathode lead to severe capacity fading of lithium manganate-carbon cells. Overcoming this major problem requires a better understanding of the mechanisms of manganese dissolution, migration and deposition. Here we apply a variety of advanced analytical methods to study lithium manganate cathodes that are cycled with different anodes. We show that the oxidation state of manganese deposited on the anodes is +2, which differs from the results reported earlier. Our results also indicate that a metathesis reaction between Mn(II) and some species on the solid-electrolyte interphase takes place during the deposition of Mn(II) on the anodes, rather than a reduction reaction that leads to the formation of metallic Mn, as speculated in earlier studies. The concentration of Mn deposited on the anode gradually increases with cycles; this trend is well correlated with the anodes rising impedance and capacity fading of the cell.
URI
https://www.nature.com/articles/ncomms3437http://hdl.handle.net/20.500.11754/44524
ISSN
2041-1723
DOI
10.1038/ncomms3437
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE