Superior cycle performance of Li metal electrode with {110} surface texturing. Issue 6 (9th August 2022)

• Record Type: Journal Article
• Authors: Hu, Xitao; Gao, Yao; Zhang, Biao; Shi, Le; Li, Quan
• Is Part Of: EcoMat. Volume 4:Issue 6(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-09
• Subjects: energy conversion and storage -- green technology -- sustainability; Materials -- Environmental aspects -- Periodicals; Clean energy -- Periodicals; 621.042
• DOI: 10.1002/eom2.12264
• Languages: English
• ISSNs: 2567-3173

Abstract

Abstract: Li metal foil is a most promising candidate for Li metal batteries, but its poor cycle stability remains a major obstacle limiting its development for practical applications. In the present work, we show that crystallographic orientation (surface texturing) of Li foil plays a key role in determining the cycle performance of the Li metal anode in both symmetrical cells and full cells. Li foil of {110} texturing is demonstrated to have superior cycling stability when compared to Li {100} or pristine Li foils without specific texturing. Experimental evidence and computational modeling suggest that the enhanced cycle performance of Li {110} originates from the low‐surface energy/surface diffusion barrier associated with the Li {110} plane, leading to not only dense Li plating but also uniform stripping during cycling. Capacity retention of 96.1% (125.0 mAh/g) after 400 cycles is demonstrated in a full cell with Li {110} anode and LiFePO4 cathode at 1 C. This work adds to the current understanding of electrochemical plating/stripping of Li metal, and leads to new technologies that can largely extend the cycle life of Li metal electrode for the next generation of energy storage devices. Abstract : {110} and {100} surface texturing of Li metal foil can be prepared using simple mechanical methods. Li foil of {110} texturing is demonstrated to have superior cycling performance when compared to Li {100} due to the flat‐stripping and dense plating characteristics of the Li {110} surface.