Interdependence of Support Wettability - Electrodeposition Rate- Sodium Metal Anode and SEI Microstructure

Chang An Lo, Yixian Wang, Varun R. Kankanallu, Aditya Singla, Dean Yen, Xiaoyin Zheng, Kaustubh G. Naik, Bairav S. Vishnugopi, Callum Campbell, Vikalp Raj, Chonghang Zhao, Lu Ma, Jianming Bai, Feipeng Yang, Ruipeng Li, Mingyuan Ge, John Watt, Partha P. Mukherjee, David Mitlin, Yu chen Karen Chen-Wiegart

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This study examines how current collector support chemistry (sodiophilic intermetallic Na2Te vs. sodiophobic baseline Cu) and electrodeposition rate affect microstructure of sodium metal and its solid electrolyte interphase (SEI). Capacity and current (6 mAh cm−2, 0.5–3 mA cm−2) representative of commercially relevant mass loading in anode-free sodium metal battery (AF-SMBs) are analyzed. Synchrotron X-ray nanotomography and grazing-incidence wide-angle X-ray scattering (GIWAXS) are combined with cryogenic ion beam (cryo-FIB) microscopy. Highlighted are major differences in film morphology, internal porosity, and crystallographic preferred orientation e.g. (110) vs. (100) and (211) with support and deposition rate. Within the SEI, sodium fluoride (NaF) is more prevalent with Te−Cu versus sodium hydride (NaH) and sodium hydroxide (NaOH) with baseline Cu. Due to competitive grain growth the preferred orientation of sodium crystallites depends on film thickness. Mesoscale modeling delineates the role of SEI (ionic conductivity, morphology) on electrodeposit growth and onset of electrochemical instability.

Original languageEnglish
Article numbere202412550
JournalAngewandte Chemie - International Edition
Volume64
Issue number8
DOIs
StatePublished - Feb 17 2025
Externally publishedYes

Funding

We gratefully acknowledge support from the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award# DE-SC0023260. This research used resources, Full Field X-ray Imaging (FXI) beamline (18-ID), Complex Materials Scattering (CMS) beamline (11-BM), and Quick X-ray Absorption and Scattering (QAS) beamline (7-BM) of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704. This research used scanning electron microscopy capabilities of the Center for Functional Nanomaterials (CFN), which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract No. DE-SC0012704. Cryo-EM was performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. The Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. This work was supported by The Welch Foundation (F-2206). We gratefully acknowledge support from the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award# DE‐SC0023260. This research used resources, Full Field X‐ray Imaging (FXI) beamline (18‐ID), Complex Materials Scattering (CMS) beamline (11‐BM), and Quick X‐ray Absorption and Scattering (QAS) beamline (7‐BM) of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science by Brookhaven National Laboratory under Contract No. DE‐SC0012704. This research used scanning electron microscopy capabilities of the Center for Functional Nanomaterials (CFN), which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract No. DE‐SC0012704. Cryo‐EM was performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. The Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. This work was supported by The Welch Foundation (F‐2206).

Keywords

  • fiber texture
  • film growth
  • sodium metal anode
  • sodium metal battery
  • solid electrolyte interphase (SEI)

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