摘要：近年来，锂离子电池以其特有的优点越来越受到关注。Co3O4用作锂离子电池负极材料，理论比容量大，但充放电过程中存在电导率低、体积变化大等因素，严重影响材料的倍率性能和循环稳定性。为了优化Co3O4的储锂性能，这里我们引入预嵌锂的处理过程，通过水热法成功制备了由纳米片自组装的空心纳米管阵列。这种三维电极的设计，充分利用空间高度，能有效提高电极体积能量密度和活性物质比容量。另外，多孔结构能抵抗锂离子在脱嵌过程中产生的体积变化，从而提高材料的循环稳定性。

关键词 锂离子电池 负极材料 四氧化三钴 水热法 预嵌锂

毕业设计说明书外文摘要

Title Design and Characterization of Cobalt-based Nanoarray Electrode

Abstract：In Recent years, lithium-ion batteries have received a great deal of attention owing to its intriguing merits. As an anode material for lithium-ion batteries, Co3O4 provides a high theoretical capacity, but poor conductivity and a large volume change during charge/discharge process strongly influence the rate capability and cycling stability of materials. In order to optimize lithium storage performance for Co3O4, here we introduced pre-insertion treatment, and successfully prepared hollow nanotube arrays self-assembled by nanosheets. The design of three-dimensional electrode, making full use of space height, effectively improves energy density of electrodes as well as specific capacity of active materials. In addition, the porous structure can buffer the volume variation associated with Li+  insertion-extraction process, thus enhancing the cycling stability.

Keywords Lithium-ion battery Anode materials Co3O4 Hydrothermal method pre-insertion

目 次

1 绪论 1

1.1 引言 1

1.2 锂离子电池概述 1

1.3 锂离子电池负极材料Co3O4 2

1.4 论文的选题依据与研究内容 4

2 实验试剂、仪器及方法 6

2.1 实验试剂与仪器 6

2.2 实验方法 6

2.3 电极材料表征 7

2.4 电极制备与电池组装 8

2.5 电池电化学性能测试 8

3 Co3O4纳米管阵列电极表征及性能研究 9

3.1 前驱体碱式碳酸钴表征 9

3.2 预嵌锂对产物性能的影响 10

3.3 预嵌锂温度对产物性能的影响 14

3.4 预嵌锂时间对产物性能的影响 18

3.5