Rational Design of a 3D Li-Metal Electrode for High-Energy Lithium Batteries
- Authors
- Eom, Ji-Yong; Choi, Seung Hyun; Kang, Ji-Hoon; Eom, Gwang Hyeon; Moon, Janghyuk; Park, Min-Sik
- Issue Date
- 22-Feb-2021
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Li metal; 3D structure; Li batteries; electrode; electrochemistry
- Citation
- ACS APPLIED ENERGY MATERIALS, v.4, no.2, pp 1936 - 1941
- Pages
- 6
- Journal Title
- ACS APPLIED ENERGY MATERIALS
- Volume
- 4
- Number
- 2
- Start Page
- 1936
- End Page
- 1941
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/47884
- DOI
- 10.1021/acsaem.0c03042
- ISSN
- 2574-0962
- Abstract
- Li metal is considered the ultimate electrode for lithium-ion batteries due to its high specific capacity (3860 mAh g(-1)) and density (0.534 g cm(-3)). Despite these advantages, the practical use of Li-metal electrodes is currently limited by uncontrollable Li-plating and stripping, which causes undesirable dendritic growth and severe volume changes during cycles. As a practical solution for the successful implementation of Li-metal electrodes, we propose herein a three-dimensional (3D) Li-metal electrode by integrating 3D Ni foam as a current collector via a molten Li impregnation process. Using both theoretical simulations and experiments, we demonstrate that our 3D Li-metal electrode creates a large contact area between active Li metal and the current collector, which is beneficial for improving the reversibility by reducing the overpotential for Li-plating and stripping and suppressing the dendritic growth of Li during cycles. Furthermore, dimensional changes of the Li-metal electrode are effectively minimized by the 3D Ni foam framework. For practical use, the feasibility of the 3D Li-metal electrode is examined in a full-cell compared to a conventional 2D Li-metal electrode. We believe that this work will provide insights into the design of advanced Li batteries configured with a Li-metal electrode.
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