A 3D Hierarchical Host with Enhanced Sodiophilicity Enabling Anode‐Free Sodium‐Metal Batteries

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  • Kyungbin Lee
    George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
  • Young Jun Lee
    Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
  • Michael J. Lee
    George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
  • Junghun Han
    Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
  • Jeonghoon Lim
    George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
  • Kun Ryu
    George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
  • Hana Yoon
    Energy Storage Laboratory Korea Institute of Energy Research 152 Gajeong‐ro Yuseong‐gu Daejeon 34129 Republic of Korea
  • Byung‐Hyun Kim
    Computational Science & Engineering Laboratory Korea Institute of Energy Research 152 Gajeong‐ro Yuseong‐gu Daejeon 34129 Republic of Korea
  • Bumjoon J. Kim
    Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
  • Seung Woo Lee
    George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA

書誌事項

公開日
2022-03
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#am
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/adma.202109767
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>Sodium‐metal batteries (SMBs) are considered as a compliment to lithium‐metal batteries for next‐generation high‐energy batteries because of their low cost and the abundance of sodium (Na). Herein, a 3D nanostructured porous carbon particle containing carbon‐shell‐coated Fe nanoparticles (PC‐CFe) is employed as a highly reversible Na‐metal host. PC‐CFe has a unique 3D hierarchy based on sub‐micrometer‐sized carbon particles, ordered open channels, and evenly distributed carbon‐coated Fe nanoparticles (CFe) on the surface. PC‐CFe achieves high reversibility of Na plating/stripping processes over 500 cycles with a Coulombic efficiency of 99.6% at 10 mA cm<jats:sup>–2</jats:sup> with 10 mAh cm<jats:sup>–2</jats:sup> in Na//Cu asymmetric cells, as well as over 14 400 cycles at 60 mA cm<jats:sup>–2</jats:sup> in Na//Na symmetric cells. Density functional theory calculations reveal that the superior cycling performance of PC‐CFe stems from the stronger adsorption of Na on the surface of the CFe, providing initial nucleation sites more favorable to Na deposition. Moreover, the full cell with a PC‐CFe host without Na metal and a high‐loading Na<jats:sub>3</jats:sub>V<jats:sub>2</jats:sub>(PO<jats:sub>4</jats:sub>)<jats:sub>3</jats:sub> cathode (10 mg cm<jats:sup>–2</jats:sup>) maintains a high capacity of 103 mAh g<jats:sup>–1</jats:sup> at 1 mA cm<jats:sup>–2</jats:sup> even after 100 cycles, demonstrating the operation of anode‐free SMBs.</jats:p>

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