广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2011年
18期
87-89
,共3页
磷酸铁锂%正极%掺杂
燐痠鐵鋰%正極%摻雜
린산철리%정겁%참잡
LiFePO4%cathode%doped
采用微波热合法制备了掺杂LiFePO4锂电池用正极材料。通过XRD、SEM表征了材料的晶体结构和形貌,采用恒电流充放电法研究了材料的电化学性能。XRD结果表明,掺杂后的材料晶相为橄榄石型磷酸铁锂;SEM测试结果表明,加热时间延长促使材料颗粒团聚长大,且结晶完整,颗粒分布均匀。对电池的电化学测试表明,制备的掺杂LiFePO4材料表现出优良倍率性能和循环稳定性,充放电比容量分别为131.7 mAh/g和123.8 mAh/g,10次循环后比容量没有明显衰减。
採用微波熱閤法製備瞭摻雜LiFePO4鋰電池用正極材料。通過XRD、SEM錶徵瞭材料的晶體結構和形貌,採用恆電流充放電法研究瞭材料的電化學性能。XRD結果錶明,摻雜後的材料晶相為橄欖石型燐痠鐵鋰;SEM測試結果錶明,加熱時間延長促使材料顆粒糰聚長大,且結晶完整,顆粒分佈均勻。對電池的電化學測試錶明,製備的摻雜LiFePO4材料錶現齣優良倍率性能和循環穩定性,充放電比容量分彆為131.7 mAh/g和123.8 mAh/g,10次循環後比容量沒有明顯衰減。
채용미파열합법제비료참잡LiFePO4리전지용정겁재료。통과XRD、SEM표정료재료적정체결구화형모,채용항전류충방전법연구료재료적전화학성능。XRD결과표명,참잡후적재료정상위감람석형린산철리;SEM측시결과표명,가열시간연장촉사재료과립단취장대,차결정완정,과립분포균균。대전지적전화학측시표명,제비적참잡LiFePO4재료표현출우량배솔성능화순배은정성,충방전비용량분별위131.7 mAh/g화123.8 mAh/g,10차순배후비용량몰유명현쇠감。
Doped LiFePO4 cathode material for lithium batteries was prepared by microwave heating method.The crystalline structure and morphology of the cathode material was characterized by XRD and SEM,respectively.The electrochemical performance of the cathode material was investigated using constant current charge and discharge.The results showed that the crystalline structure of the doped material presented the olivine-type crystal phase,the material particles reunion grew up with the heating time increasing complete crystallization,and had uniform particle size.The capability and cycling stability of the doped material exhibited excellent,the charge and discharge capacity of doped material was 131.7 mAh/g and 123.8 mAh/g,respectively,and the capacity was not changed significantly after charge-discharge 10 cycles.