3D Cu Pyramid Array Grown on Planar Cu Foil for Stable and Dendrite-free Lithium Deposition

IF 0.8 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yaohua LIANG, Teddrick SCHAFFER, Abdus SOBHAN, Matthew BIESECKER, Zhongjiu YANG, Chenyu HAN, Jie HU, Alevtina SMIRNOVA, Zhengrong GU
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引用次数: 0

Abstract

Lithium metal is recognized as the anticipated anode for rechargeable batteries because of its inherent physicochemical properties. Unfortunately, the industrialization of Li metal anodes (LMAs) has been entangled in some intractable problems stemming from the uncontrollable growth of Li dendrites, which could result in the issue of short-circuit, thereby leading to cell failure. Here, a three-dimensional structured Cu pyramid array (CPA@CF) is constructed on planar Cu foil (CF) by the simple electrodeposition method. Owing to the features of large surface area and 3D porous structure, the proposed CPA@CF not only can promote Li-ion diffusion and charge transfer, but also effectively slow down the volume change of Li. Consequently, an even and steady Li plating/stripping process up to 360 h is realized using such a CPA@CF current collector. The Li@CPA@CF|LiFePO4 full cell achieves an excellent Coulombic efficiency (CE) of 99.3 % for 160 cycles at 0.3 C with a superior capacity retention of 84.2 %.
在平面铜箔上生长三维铜金字塔阵列用于稳定和无枝晶锂沉积
由于其固有的物理化学性质,锂金属被认为是可充电电池的理想阳极。不幸的是,锂金属阳极(lma)的工业化一直纠缠于一些棘手的问题,这些问题源于锂枝晶的不可控生长,可能导致短路问题,从而导致细胞衰竭。本文采用简单电沉积法在平面铜箔上构建了三维结构的铜金字塔阵列(CPA@CF)。由于大表面积和三维多孔结构的特点,所提出的CPA@CF不仅可以促进锂离子的扩散和电荷转移,还可以有效地减缓锂的体积变化。因此,使用这种CPA@CF集流器实现了长达360 h的均匀稳定的锂电镀/剥离过程。Li@CPA@CF|LiFePO4全电池在0.3℃下循环160次,库仑效率(CE)达到99.3%,容量保持率达到84.2%。
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来源期刊
Materials Science-medziagotyra
Materials Science-medziagotyra 工程技术-材料科学:综合
CiteScore
1.70
自引率
10.00%
发文量
92
审稿时长
6-12 weeks
期刊介绍: It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.
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