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나노입자 연구단
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Insights on the delithiation/lithiation reactions of LixMn0.8Fe0.2PO4 mesocrystals in Li+ batteries by in situ techniques

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Title
Insights on the delithiation/lithiation reactions of LixMn0.8Fe0.2PO4 mesocrystals in Li+ batteries by in situ techniques
Author(s)
Wi S.; Jungjin Park; Lee S.; Kim J.; Gil B.; Yun A.J.; Yung-Eun Sung; Park B.; Kim C.
Publication Date
2017-09
Journal
NANO ENERGY, v.39, no., pp.371 - 379
Publisher
Elsevier BV
Abstract
The kinetic processes during delithiation/lithiation of LixMn0.8Fe0.2PO4 are thoroughly investigated through operando x-ray diffraction and in situ electrochemical impedance spectroscopy combined with galvanostatic intermittent titration technique (GITT), by which new insights on the phase propagation and sluggish kinetics of LiMn0.8Fe0.2PO4 (LMFP) cathode materials are elaborated. In situ analyses on the solvothermally synthesized carbon-coated LMFP mesocrystals reveal that the phase-propagation mechanisms differ during delithiation/lithiation processes, and the sluggish kinetics of LMFP followed by the limitation of achievable (dis)charge capacities originate from the poor apparent Li+ diffusivity, which is triggered by Mn redox reaction. Based on the in-depth characterization of the reaction kinetics in LMFP mesocrystals, our work provides fundamental understanding to design high-performance Mn-based olivine cathodes. © 2017 Elsevier Ltd.
URI
https://pr.ibs.re.kr/handle/8788114/4233
ISSN
2211-2855
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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