Mn(II) deposition on anodes and its effects on capacity fade in spinel lithium manganate-carbon systemsopen access
- Authors
- Zhan, Chun; Lu, Jun; Kropf, A. Jeremy; Wu, Tianpin; Jansen, Andrew N.; Sun, Yang Kook; Qiu, Xinping; Amine, Khalil
- Issue Date
- Sep-2013
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.4, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 4
- Start Page
- 1
- End Page
- 8
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26649
- DOI
- 10.1038/ncomms3437
- ISSN
- 2041-1723
- 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.
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