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  • 09월 20일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제126회 대한화학회 학술발표회 및 총회 Structural and electrochemical studies of LiFeBO3 as a cathode material for lithium-ion battery

2020년 9월 3일 16시 20분 10초
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화 10시 : 32분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists II
저자 및
Yujin Son, Youngil Lee1,*
chemistry, University of Ulsan, Korea
1Department of Chemistry, University of Ulsan, Korea
Lithium iron borate, LiFeBO3, is a particularly desirable cathode material for lithium-ion batteries because of its appealing chemical components, which are inexpensive and non-toxic and its high theoretical capacity of 220 mAh g-1. However, it has low electrical conductivity due to its structural characteristics. Fluorine substitution at the oxygen sites of LiFeBO3 to increase its conductivity and improve electrochemical properties has been studied with phase transition from monoclinic to vonsenite, in previous study. But after the first charge/discharge cycle, it indicate a dramatic decrease of capacity. So, we are studying to improve the stability of its structure by coating at the surface of LiFeBO3-xF2x with maintaining high discharge capacity. The surface coated LiFeBO3-xF2x have been synthesized by solid-state method and characterized by X-ray diffractometry (XRD), TEM images and 7Li MAS NMR spectroscopy. The electrochemical properties of surface coated LiFeBO3-xF2x have been measured by using Galvano static charge/discharge test with the potential range of 1.0 - 4.5 V.