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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster I
CPP 15.28: Poster
Montag, 18. März 2024, 18:00–20:00, Poster C
3D Electrodeposition Porous Cu for Long-cycling Lithium-Metal Batteries — •Lyuang Cheng1, Zhuijun Xu1, Tianle Zheng1, Yingying Yan1, Ruoxuan Qi1, Yuxin Liang1, Fabian A. C. Apfelbeck1, Yajun Cheng2, and Peter Müller-Buschbaum1,3 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2Hohai University, 213022 Changzhou, China — 3TUM, MLZ, 85748 Garching, Germany
Lithium (Li) metal is the ultimate anode for rechargeable batteries. Its high specific capacity (3860 mAh g*1) and low voltage (*3.04 V vs standard hydrogen electrode) warrant optimal cell energy density. However, these anodes rely on repeated plating and stripping of Li, which leads to consumption of Li inventory and the growth of dendrites that can lead to self-discharge and safety issues. To address these issues and problems related to the volume change of these anodes, a number of different porous conductive scaffolds have been reported to create high surface area electrodes on which Li can be plated reliably. While impressive results have been reported in literature, current processes typically rely on either expensive or poorly scalable techniques. Herein, we report a scalable fabrication method to create porous Cu anodes using a one-step electrodeposition process. The areal loading, pore structure, and electrode thickness can be tuned by changing the electrodeposition parameters, and we show the in-situ WAXS images with lithium growth which can help explain the mechanism of dendrites. We also provide a feasible method to fabricate the porous Cu cathodes with different electrodeposition solution concentrations.
Keywords: Electrodeposition; Lithium; Batteries; WAXS; Copper