近年来,硅基和氧化锌基负极材料因具有比商用石墨材料更高的理论比容量而备受关注。Si基薄膜材料的离子及电子传输距离短,而且制备过程无需粘结剂;ZnO基微纳米材料则具有转移化反应和合金化反应所带来的高比容量和形貌多样等优点,因此两者作为锂离子电池负极都具有良好应用前景。然而,由于在循环稳定性和倍率性能方面都存在明显缺陷,相比于碳基负极材料,ZnO微纳米结构和Si薄膜材料负极的储锂性能研究报道较为少见。这主要是由于两种活性物质都在脱/嵌锂过程中遭受巨大的体积变化,剧烈的体积膨胀/收缩引起的大的应力将造成电极材料破裂、粉化,导致容量锐减,循环寿命下降;另外,Si和ZnO材料自身较差的电子导电性严重制约...Recently,the Si-based and ZnO-based negative materials have attracted much attention, due to higher theoretical specific capacity than that of the commercial graphite materials. Si-based thin film materials have some advantages, such as, low volume effect, short ionic, electronic transmission distance, and being directly combined with the current collectors without binder. Additionally, ZnO micro/...学位:工学硕士院系专业:材料学院_材料物理与化学学号:2072014115007