纳米锡锌复合氧化物贮锂材料的合成和性质  

Synthesis and Properties of Nanosized Tin-zinc Composite Oxides as Lithium Storage Materials

作　　者：袁正勇[1] 袁良杰[1] 孙聚堂[1] 

机构地区：[1]武汉大学化学和分子科学学院

出　　处：《高等学校化学学报》2006年第12期2252-2255,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20471044)资助.

摘　　要：用液相沉淀-热解法合成了一系列结构和组成不同的锂离子电池纳米锡锌复合氧化物贮锂材料,通过XRD、TEM和电化学测试对材料进行了表征.测试结果表明,非晶态ZnSnO3负极材料的初始可逆贮锂容量为844mA·h/g,ZnO·SnO2负极材料的初始可逆贮锂容量为845mA·h/g,SnO2·Zn2SnO4复合物负极材料初始可逆贮锂容量为758mA·h/g,循环10周后,三者的充电容量分别为695,508和455mA·h/g,表明非晶态结构的锡锌复合氧化物具有较好的电化学性质,随着样品中晶体的形成,该类型负极材料的贮锂性能下降.The precursor was prepared with liquid precipitation method. A series of tin-zinc composite oxides with different components and structures were synthesized as the anode materials for lithium ion batteries when the precursor was pyrolyzed at different temperatures. The products were characterized by XRD, TEM and electrochemical measurements. The reversible capacity of amorphous ZnSnO3 is 844 mA·h/g in the first cycle and the charge capacity is 695 mA·h/g in the 10th cycle. The reversible capacity of ZnO·SnO2 is 845 mA·h/g in the first cycle and the charge capacity is 508 mA·h/g in the 10th cycle. The reversible capacity of SnO2·Zn2SnO4 is 758 mA·h/g in the first cycle and the charge capacity is 455 mA·h/g in the 10th cycle. The results show that amorphous ZnSnO3 exhibits the best electrochemical property among all of the tinzinc composite oxides. With the formation of crystallites in the samples, the electrochemical property of tinzinc composite oxides decreases.

关 键 词：锡锌复合氧化物 锂离子电池 贮锂材料 

分 类 号：O612[理学—无机化学]