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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Battery Performance of C-coated Nanocrystalline LiMnPO4 Cathode

2012년 2월 4일 12시 58분 52초
ELEC.P-1223 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 25일 (수요일) 18:00~21:00
저자 및
Hung-Cuong Dinh, 여인형1, 모선일
아주대학교 에너지시스템학부 화학, Korea
1동국대학교 화학과, Korea
As new class of intercalation compounds, phosphates with olivine structure rather than oxides, has emerged that overcome many of the weaknesses inherent to earlier cathode candidates. LiMnPO4 olivine structure is attracted much attention as the most promising material for rechargeable Li-ion batteries, due to high energy density (ca. 701 Whkg-1), the redox potential of 4.1 V vs. Li/Li+, and high theoretical capacity of 171 mAhg-1. However, the very low electronic conductivity is preventing high rate performance of the LiMnPO4 cathode. To improve electrochemical characteristic of LiMnPO4, optimizing particle size to nano-scale is necessary owing to its high specific surface area, short diffusion lengths for Li-ion. In this work, well-crystallized LiMnPO4 nanoparticles were prepared by a simple hydrothermal method using LiOH, H3PO4, Mn(CH3COO)2.4H2O, glucose. After that, the LiMnPO4 nanoparticles were coated with carbon on surface by pyrolysing sucrose in an inert atmosphere. The structure, morphology and electrochemical properties, carbon content were analyzed by the X-ray powder diffraction (RXD) patterns, scanning electron microscopic (SEM) images, Raman spectrometer, and thermal gravimetric analyzer (TGA). The lithium batteries with the C-coated LiMnPO4 nanoparticles cathode were assembled in a coin-type (CR2032) cell in a dry room and the batteries were cycled galvanostatically a potential range of 2.0-4.4 V using a multichannel battery test mode (Maccor 4000).