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通过双度梯度多孔Cu-CuZn主体设计高性能金属电池

Jianyu Chen¹, Guanyu Liu¹, Xuran Han¹

¹State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.

|May 16, 2024

概括

一种新型的多孔铜-铜-宿主 (DG-CCZ) 通过改善沉积和抑制树突形成,增强金属阳极的稳定性. 这导致金属电池的超级循环性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

多孔铜电流采集器显示出稳定金属阳极 (LMA) 的潜力.
限制包括纯铜的性不足和3D结构中的孔性有限,阻碍了高效的复合材料制备和性能.
这些问题导致Li-Cu复合体阳极的电化学性能差.

研究的目的:

为金属阳极开发一种新的多孔铜-铜- (Cu-CuZn) 主体材料.
为了应对现有的3D多孔铜结构中不够的电性和有限的多孔性的挑战.
为了提高Li-Cu复合材料的制备,并提高Li-Cu复合材料阳极的电化学性能.

主要方法:

制造一个双梯度多孔Cu-CuZn (DG-CCZ) 主机架构.
孔隙大小分布和梯度的特征性-性特性.
使用DG-CCZ主机对Li半细胞,Li-Li对称细胞和Li-LFP全细胞进行电化学测试.

主要成果:

该DG-CCZ宿主表现出极好的毛细管湿度到化和高孔度 (66.05%).
梯度设计促进了优选的内部沉积,有效地抑制了树状的形成.
在所有测试的细胞配置中观察到更好的循环稳定性.
一个带有双涂层 LiFePO4 阴极的囊细胞在 1C 时显示出 159.3 mAh g-1 的放电容量.

结论:

开发的双梯度多孔Cu-CuZn主机显著提高了金属阳极的稳定性和电化学性能.
这种架构有效地控制沉积,并抑制树的生长,提高利用效率.
该研究为设计用于高能金属电池的先进3D阳极提供了一个有前途的策略.

关键词:

金属电池金属电池毛细管的作用是毛细管的作用.目前的收藏家是目前的收藏家这是一个双梯度梯度.化的Li是化的Li.

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