Extraordinary dendrite-free Li deposition on highly uniform facet wrinkled Cu substrates in carbonate electrolytes. (April 2021)

• Record Type: Journal Article
• Authors: Kim, Ju Ye; Chae, Oh B.; Wu, Mihye; Lim, Eunsoo; Kim, Gukbo; Hong, Yu Jin; Jung, Woo-Bin; Choi, Sungho; Kim, Do Youb; Gereige, Issam; Suk, Jungdon; Kang, Yongku; Jung, Hee-Tae
• Is Part Of: Nano energy. Volume 82(2021)
• Publication Date: 2021-04
• Subjects: Cu substrate -- Uniform facet -- Li dendrite -- Li-metal battery -- Surface pattern control -- Carbonate electrolyte; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.105736
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Despite much research focused on lithium (Li) metal batteries, an important issue concerning Li-dendrite growth on the anode remains unresolved. The intrinsic mechanism of this Li-dendrite formation is related to the non-uniform distribution of Li-ion flux on the anode in charge/discharge caused by irregular structure and energy of anode surface. Here we report upon dendrite-free Li-deposition in a carbonate-based electrolyte using a novel Cu anode structure with sharp wrinkles and a [100] crystal facet. This uniform Li-deposition resulted in long-term electrochemical cyclability in Li/Cu and LiFePO4 /Li cell. Our observations revealed that the wrinkled Cu surface and the unifying [100] crystal facet play important roles in enhancing the uniformity of the Li-ion flux and the adsorption energy of the Li-ions on Cu, respectively. We expect that this study will permit the use of a wide range of wrinkled structures and crystal planes to obtain high-energy and long-term cycles of Li-metal batteries. Graphical Abstract: ga1 Highlights: Dendrite-free Li deposition is obtained using wrinkled Cu with uniform [100] facet. Wrinkled surface structure on Cu provides uniform Li + flux for uniform Li deposition. Uniform [100] facet distribution equalizes Li adsorption energy on the Cu. The uniform Li deposition resulted in long-term cyclability with 99% CE.