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요약정보
黄铁矿作为锂电池正极材料的电化学性能 / Electrochemical Properties of Pyrite as Lithium Battery Cathode Materials
Resource Type
Academic Journal
Authors
王大刚
;
范力仁
;
王圣平
;
范畴
;
何明中
;
栗海峰
;
WANG Dagang
;
FAN Liren
;
WANG Shengping
;
FAN Chou
;
HE Mingzhong
;
LI Haifeng
Source
材料导报 / Materials Review
. 26(18):93-96
Subject
黄铁矿
锂电池
正极材料
电化学性能
Language
Chinese
ISSN
1005-023X
Online Access
Find it @ DONGA
초록
对天然黄铁矿进行深加工后获得平均粒径为13μm,ω(Fe)、ω(S)分别为45.30%、50.95%的超微细黄铁矿粉,并以高级脂肪酸盐对其进行改性,采用TG/DSC、XPS及XRD对粉体进行了表征.XRD和TG/DSC分析表明粉体主要物相为黄铁矿FeS2,表面包覆着有机改性剂;XPS分析结果表明,改性前后黄铁矿表面S分别以8O42-和[S2]2-形式存在,而Fe均以Fe3+形式存在.对粉体试样进行电化学阻抗谱、恒电流放电测试和循环伏安测试,结果表明,改性黄铁矿具有较小的电荷转移电阻和较好的导电性;常温下以0.354A电流放电,截止电压为0.5V,改性黄铁矿的放电电位平台为1.44V,放电比容量达850mAh/g,接近理论容量890mAh/g.
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