功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2013年
21期
3143-3145,3148
,共4页
黄冬海%常照荣%李苞%冯婷
黃鼕海%常照榮%李苞%馮婷
황동해%상조영%리포%풍정
液相法%无定形%锂离子电池%LiFePO4/C%三乙二醇
液相法%無定形%鋰離子電池%LiFePO4/C%三乙二醇
액상법%무정형%리리자전지%LiFePO4/C%삼을이순
liquid-phase method%amorphous%lithium ion battery%LiFePO4/C%TEG
以三乙二醇水溶液为反应介质,在常压和108℃条件下,快速生成含有元素 Li、Fe、P 的前驱体。XRD和SEM分析表明,所得前驱体属于无定形结构,与一定量葡萄糖混合后在600℃下焙烧3h后得到的是纳米级的LiFePO4/C材料。电化学测试结果表明,这种纳米级LiFePO4/C材料在2.3~4.2V之间0.2C倍率下放电容量达到156.3 mAh/g,并且具有较好的放电平台。5和10C放电容量仍能达到133.9和109.9mAh/g,表现出优异的倍率放电特性和循环性能。
以三乙二醇水溶液為反應介質,在常壓和108℃條件下,快速生成含有元素 Li、Fe、P 的前驅體。XRD和SEM分析錶明,所得前驅體屬于無定形結構,與一定量葡萄糖混閤後在600℃下焙燒3h後得到的是納米級的LiFePO4/C材料。電化學測試結果錶明,這種納米級LiFePO4/C材料在2.3~4.2V之間0.2C倍率下放電容量達到156.3 mAh/g,併且具有較好的放電平檯。5和10C放電容量仍能達到133.9和109.9mAh/g,錶現齣優異的倍率放電特性和循環性能。
이삼을이순수용액위반응개질,재상압화108℃조건하,쾌속생성함유원소 Li、Fe、P 적전구체。XRD화SEM분석표명,소득전구체속우무정형결구,여일정량포도당혼합후재600℃하배소3h후득도적시납미급적LiFePO4/C재료。전화학측시결과표명,저충납미급LiFePO4/C재료재2.3~4.2V지간0.2C배솔하방전용량체도156.3 mAh/g,병차구유교호적방전평태。5화10C방전용량잉능체도133.9화109.9mAh/g,표현출우이적배솔방전특성화순배성능。
The precursor contained element of Li,Fe,P was synthesized in the triethylene glycol (TEG)/H2 O system under ambient pressure and 108℃ during a short time.The XRD and SEM results show that:the ob-tained precursor belonged to amorphous structure,and LiFePO4/C nanocomposites was obtained by sintering at 600℃ with a certain amount of glucose under inert atmosphere for 3h.Electrochemical tests showed that the special capacity of nanometer LiFePO4/C at discharge rates of 0.2 was 156.3mAh/g and has the better dis-charge platform.A capacity of 133.9mAh/g at 5C and 109.9mAh/g at 10C was even achievable,with no signif-icant capacity fading after 200 cycles.Show excellent rate discharge characteristics and cycle performance.