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나노입자 연구단
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Synchrotron-based x-ray absorption spectroscopy for the electronic structure of LixMn0.8Fe0.2PO4 mesocrystal in Li+ batteries

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Title
Synchrotron-based x-ray absorption spectroscopy for the electronic structure of LixMn0.8Fe0.2PO4 mesocrystal in Li+ batteries
Author(s)
Wi S.; Jungjin Park; Lee S.; Kang J.; Hwang T.; Lee K.-S.; Lee H.-K.; Nam S.; Kim C.; Yung-Eun Sung; Park B.
Publication Date
2017-01
Journal
Nano Energy, v.31, no., pp.495 - 503
Publisher
Elsevier BV
Abstract
The carbon-coated LiMn0.8Fe0.2PO4 (LMFP) mesocrystal, composed of ~40-nm-sized nanocrystallites, was designed to be favorable for the fast charge transport kinetics. The carbon-coated LMFP mesocrystal exhibited good electrochemical properties (i.e., high specific capacity and superior rate capability), ensuring that the LMFP mesocrystal is a proper model system to study the reaction mechanism upon the battery cycling. In order to investigate the electronic-structure effects of each transition metal (Mn and Fe) on the electrochemical performance, we performed synchrotron-based soft and hard x-ray absorption spectroscopy (sXAS and XAS), and quantitatively analyzed the changes of the transition-metal redox states in the carbon-coated LMFP electrodes during the electrochemical reaction. We believe that our comprehensive as well as complementary analyses using ex situ sXAS and in situ XAS can provide clear experimental evidence on the reaction mechanism of LiMn0.8Fe0.2PO4 electrodes during battery operation. © 2016 Elsevier Lt
URI
https://pr.ibs.re.kr/handle/8788114/3488
ISSN
2211-2855
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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