LiFePO_4/C复合材料的固相合成及碳源的影响  

Solid-state synthesizing of LiFePO_4/C composites and effects of carbon source

作　　者：王国宝[1] 王先友[1] 舒洪波[1] 王英平[1] 

机构地区：[1]湘潭大学化学学院环境友好化学与应用教育部重点实验室,湖南湘潭411105

出　　处：《电池》2009年第6期340-342,共3页Battery Bimonthly

基　　金：国家自然科学基金(20871101);科技部科技计划项目(2009GJD20021);湖南省科技厅重点攻关项目(2009WK2007)

摘　　要：以FeSO4.7H2O为铁源,用固相法合成了正极材料橄榄石型LiFePO4/C复合材料,研究了焙烧温度、反应时间和碳源对产物结构、形貌及电化学性能的影响。用蔗糖作碳源,在700℃下煅烧15 h制得的样品,具有均一的橄榄石型结构,在电流为17 mA/g(0.1C)时的首次放电比容量为151 mAh/g,循环性能良好。LiFePO4/C composite was synthesized by solid-state method using FeSO4 ·7H2O as iron source. The effects of calcination temperature,reaction time and carbon source on the structure, morphology and electrochemical performance of the products were studied. Sucrose as carbon precursor, the sample prepared by calcination at 700 ℃ for 15 h had homogeneous olivine structure,its initial specific discharge capacity was 151 mAh/g at the current of 17 mA/g（0.1 C）, the cycle performance was fine.

关 键 词：LIFEPO4/C复合材料 固相法 正极材料 电化学性能 

分 类 号：O614.111[理学—无机化学]