A self-supported, three-dimensional porous copper film as a current collector for advanced lithium metal batteries†,Journal of Materials Chemistry A

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A self-supported, three-dimensional porous copper film as a current collector for advanced lithium metal batteries†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-11-29 00:00:00 , DOI: 10.1039/c8ta09384a
Yujun Shi _{1,

2,

3,

4,

5} , Zhenbin Wang _{1,

2,

3,

4,

5} , Hui Gao _{1,

2,

3,

4,

5} , Jiazheng Niu _{1,

2,

3,

4,

5} , Wensheng Ma _{1,

2,

3,

4,

5} , Jingyu Qin _{1,

2,

3,

4,

5} , Zhangquan Peng _{5,

6,

7,

8,

9} , Zhonghua Zhang _{1,

2,

3,

4,

5}

Affiliation

Li metal anodes have high capacity and low potential, however, many intrinsic problems such as the growth of Li dendrites hamper the development of Li metal batteries. Herein, we proposed a scalable approach to construct a three-dimensional (3D) porous structure on commercial Cu foil through a liquid Ga-induced alloying–dealloying strategy. The porous structure with a large surface area could effectively homogenize the Li deposition, thus alleviating the growth of Li dendrites. When the 3D porous Cu is used as the current collector, the coulombic efficiency of half cells is up to 98% over 200 cycles at 0.5 mA cm⁻², and a long cycling life surpassing 700 h at 0.5 mA cm⁻² is obtained in symmetric cells. Besides, full cells with a LiFePO₄ cathode exhibit good cycling stability and excellent rate capability. Our findings provide a innovative strategy to fabricate advanced current collectors and solve the problem of Li metal batteries.

中文翻译：

自支撑的三维多孔铜膜作为高级锂金属电池的集电器†

锂金属阳极具有高容量和低电势，但是，许多固有的问题，例如锂树枝状晶体的生长，阻碍了锂金属电池的发展。本文中，我们提出了一种可扩展的方法，该方法可通过液态Ga诱导的合金化-脱合金策略在商用Cu箔上构建三维（3D）多孔结构。具有大表面积的多孔结构可以有效地均化Li的沉积，从而减轻Li树枝状晶体的生长。当将3D多孔Cu用作集电器时，在0.5 mA cm ^-2的200个循环中，半电池的库伦效率高达98％，并且在0.5 mA cm ^-2的情况下获得了超过700 h的长循环寿命。对称细胞。此外，带有LiFePO _4的充满电的电池阴极表现出良好的循环稳定性和优异的倍率能力。我们的发现为制造高级集电器和解决锂金属电池的问题提供了创新的策略。

更新日期：2018-11-29

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