| 轻质三维多孔泡沫铝用作高性能锂金属负极骨架 |
| Lightweight 3D porous Al foams for the hosts of high-performance Li metal anodes |
| 作者 | 单位 | E-mail | | 江伟伟 | 南昌大学物理与材料学院, 南昌 330031 | | | 李俊杰 | 南昌大学物理与材料学院, 南昌 330031 | | | 叶承舟 | 南昌大学物理与材料学院, 南昌 330031 | | | 张婧 | 南昌大学物理与材料学院, 南昌 330031 | | | 黄龙 | 南昌大学物理与材料学院, 南昌 330031 | | | 吴熙 | 南昌大学物理与材料学院, 南昌 330031 | | | 胡振民 | 南昌大学物理与材料学院, 南昌 330031 | | | 李文集 | 南昌大学物理与材料学院, 南昌 330031 | | | 戴煜 | 南昌大学物理与材料学院, 南昌 330031 | | | 孙福根 | 南昌大学物理与材料学院, 南昌 330031 | sunfugen@ncu.edu.cn |
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| 摘要: 将轻质、三维多孔且亲锂的泡沫铝用作锂（Li）金属负极骨架，通过简单的机械挤压方法，将泡沫铝与金属Li复合，制得Al@Li复合负极。泡沫铝自身的高亲锂性，能够为Li金属成核提供丰富且均匀的活性位点，诱导Li在泡沫铝内部的快速成核和均匀电沉积。同时，泡沫铝的三维多孔结构，可以容纳Li金属负极在充放电过程中的巨大体积应变，降低局部电流密度，从而有效抑制Li枝晶的生长。因此，与纯Li金属负极相比，所获得的Al@Li复合负极在对称电池和LiFePO4||Al@Li半电池中，均表现出了更加优异的循环稳定性。 |
| 关键词: 锂二次电池 Li金属负极 泡沫铝 Li枝晶 |
| 基金项目: 国家自然科学基金项目（No.51962022）、江西省自然科学基金项目（No.20212ACB214012）和中央引导地方科技发展项目（No.20202ZDB01008）资助 |
| Abstract: Lightweight, 3D porous, and lithiophilic Al foams has been used as the hosts for Li metal anodes, and compounded with metallic Li by a facile mechanical extrusion method to obtain the Al@Li composite anodes. The high lithiophilicity of Al foams could provide abundant and uniform active sites for Li nucleation, thus inducing the fast nucleation and uniform electro-deposition of Li metal into the Al foams. Moreover, the 3D porous structures of Al foams could accommodate the huge volume change of Li metal anodes during the charge/discharge process and reduce the local current density, thus effectively inhibiting the growth of Li dendrites. Therefore, compared with the bare Li metal anodes, the obtained Al@Li composite anodes exhibited higher cycling stability of Li plating/stripping with a lower overpotential of ca. 5 mV at 1 mA·cm-2 after 250 cycles in their symmetric cells. Furthermore, half-cell configurations with the Al@Li composite anodes and LiFePO4 cathodes also presented significantly enhanced cycling capacity and rate performance. |
| Keywords: Li secondary batteries Li metal anodes Al foams Li dendrites |
| 投稿时间：2022-07-27 修订日期：2022-11-04 |
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| 江伟伟,李俊杰,叶承舟,张婧,黄龙,吴熙,胡振民,李文集,戴煜,孙福根.轻质三维多孔泡沫铝用作高性能锂金属负极骨架[J].无机化学学报,2023,39(2):291-299. |
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