| 王建宇,王佳杰,王春花,王瑜,邓盛珏.基于磁控溅射法锂金属表面Sn修饰研究[J].井冈山大学自然版,2025,(5):19-26 |
| 基于磁控溅射法锂金属表面Sn修饰研究 |
| Sn MODIFICATION ON LITHIUM METAL SURFACES BASED ON MAGNETRON SPUTTERING METHOD |
| 投稿时间：2025-01-06 修订日期：2025-03-12 |
| DOI：10.3969/j.issn.1674-8085.2025.05.003 |
| 中文关键词: 金属锂负极 表面修饰 磁控溅射 锂电池 枝晶抑制 |
| 英文关键词: Lithium metal anode surface modification magnetron sputtering lithium battery dendrite inhibition |
| 基金项目:国家自然科学基金青年基金项目(52302235); 安徽省高等学校自然科学研究重大项目(2024AH040172) |
| 作者 | 单位 | E-mail | | 王建宇 | 安庆师范大学化学化工学院, 安徽, 安庆 246133 | | | 王佳杰 | 安庆师范大学化学化工学院, 安徽, 安庆 246133 | | | 王春花 | 安庆师范大学化学化工学院, 安徽, 安庆 246133 | springflowerwang@sina.com | | 王瑜 | 安庆师范大学化学化工学院, 安徽, 安庆 246133 | | | 邓盛珏 | 安庆师范大学化学化工学院, 安徽, 安庆 246133 | |
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| 中文摘要: |
| 金属锂（Li）具有高理论容量和低工作电压，是能量密度最高的负极之一。但Li因具有较高的化学活性而容易与电解质发生反应，形成不规则的锂枝晶，从而影响电池库仑效率并造成安全隐患。为了克服这些技术问题，通过磁控溅射将0～100 nm不同厚度的Sn薄膜溅射沉积在锂金属箔表面，并探究最合适的厚度。研究结果表明，在锂箔表面Sn沉积厚度30 nm时，对称锂电池中具有最高的循环寿命和最低的接触阻抗。并且作为负极与磷酸铁锂组成电池，其电化学性能最优，其在1.0 C(1.0 C=170.0 m A·g-1)下首周放电比容量为130.4 m Ah·g-1，循环200周后比容量仍可保持在119.9 m Ah·g-1，显示出了良好的循环性能，同时也表现出了较好的倍率性能。 |
| 英文摘要: |
| One of the most energy-dense anodes for energy storage devices is lithium metal, which has a large theoretical capacity and a low working potential voltage. Its strong chemical activity, which results in constant reactions with electrolytes, limits its practical use. This leads to low coulombic efficiency and the formation of lithium dendrites, which raises safety issues. In order to overcome these problems, magnetron sputtering was used to directly cover Li metal foil with amorphous Sn thin films ranging in thickness from 0 to 100 nm, and the ideal thickness was investigated. The results demonstrate that the highest cycle life and lowest contact impedance in symmetric lithium batteries were achieved at a thickness of 30 nm for Sn deposition on the lithium foil surface.And as the anodes with lithium iron phosphate to form a battery, its electrochemical performance is optimal, and its specific capacity is 130.4 mAh·g-1 in the first week of discharge at 1.0 C(1.0 C=170.0 mA·g-1), and the specific capacity can still be maintained at 119.9 m Ah·g-1 after 200 weeks of cycling, which shows a good cycling performance, as well as a better multiplicity performance. |
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