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Electrochemically Dealloyed 3D Porous Copper Nanostructure as Anode Current Collector of Li-Metal Batteries

Journal Article · · Small
 [1];  [1];  [2];  [3];  [2];  [1];  [1];  [1];  [1]
  1. Georgia Institute of Technology, Atlanta, GA (United States)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States)

The commercialization of high-energy Li-metal batteries is impeded by Li dendrites formed during electrochemical cycling and the safety hazards it causes. Here, a novel porous copper current collector that can effectively mitigate the dendritic growth of Li is reported. This porous Cu foil is fabricated via a simple two-step electrochemical process, where Cu-Zn alloy is electrodeposited on commercial copper foil and then Zn is electrochemically dissolved to form a 3D porous structure of Cu. The 3D porous Cu layers on average have a thickness of ≈14 um and porosity of ≈72%. This current collector can effectively suppress Li dendrites in cells cycled with a high areal capacity of 10 mAh cm-2 and under a high current density of 10 mA cm-2. This electrochemical fabrication method is facile and scalable for mass production. In conclusion, results of advanced in situ synchrotron X-ray diffraction reveal the phase evolution of the electrochemical deposition and dealloying processes.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704; AC02-06CH11357; AC02-76SF00515
OSTI ID:
2319174
Alternate ID(s):
OSTI ID: 2404964
OSTI ID: 1973551
Report Number(s):
BNL--225363-2024-JAAM
Journal Information:
Small, Journal Name: Small Journal Issue: 28 Vol. 19; ISSN 1613-6810
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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