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제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Spectroscopic and electrochemical studies of iodine substituted monoclinic LiFeBO3 as a cathode material for Li-ion batteries

등록일
2016년 8월 22일 16시 32분 24초
접수번호
3005
발표코드
ANAL1.O-11 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 10시 : 17분
발표형식
구두발표
발표분야
분석화학 - Oral Presentation of Young Analytical Chemists Ⅰ
저자 및
공동저자
이한솔, 이영일*, 이형동
울산대학교 화학과, Korea
There are intensive research activities into alternative electrode materials for the next generation of Li-ion batteries, particularly for use in hybrid electric vehicles and grid scale battery. Monoclinic structured lithium metal borate, LiMBO3 (M = Mn, Fe and Co) for cathode material of Li-ion battery have attracted great interest due to the lowest weight polyanion BO33- which offers high theoretical capacity (220mAh/g), environmental friendliness, and high energy density with small volume change of 2%. However, lithium metal borates are considered to have intrinsically low ionic and electronic conductivity which is believed to be the cause of the poor electrochemical performance. Iodine substituted LiM(BO3)1-xI3x (M=Fe) have been proposed as alternatives to the conventional cathode material. LiFe(BO3)1-xI3x (x= 0.001, 0.002, 0.003) was synthesized by solid state reaction process. Among them, LiFe(BO3)1-xI3x (x=0.001) shows the best cycleability. It is characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and electrochemical test. 7Li MAS NMR was investigated to find lithium local structure of LiFe(BO3)1-xI3x . 7Li MAS NMR spectra of LiFe(BO3)1-xI3x (x= 0.001, 0.002, 0.003) shows a single isotropic peak with spinning sidebands.

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