Publications

Detailed Information

Revisiting Lithium- and Sodium-Ion Storage in Hard Carbon Anodes

Cited 21 time in Web of Science Cited 28 time in Scopus
Authors

Kim, Hoseong; Hyun, Jong Chan; Kim, Do-Hoon; Kwak, Jin Hwan; Lee, Jin Bae; Moon, Joon Ha; Choi, Jaewon; Lim, Hee-Dae; Yang, Seung Jae; Jin, Hyeong Min; Ahn, Dong June; Kang, Kisuk; Jin, Hyoung-Joon; Lim, Hyung-Kyu; Yun, Young Soo

Issue Date
2023-03
Publisher
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Citation
Advanced Materials, Vol.35 No.12, p. 2209128
Abstract
The galvanostatic lithiation/sodiation voltage profiles of hard carbon anodes are simple, with a sloping drop followed by a plateau. However, a precise understanding of the corresponding redox sites and storage mechanisms is still elusive, which hinders further development in commercial applications. Here, a comprehensive comparison of the lithium- and sodium-ion storage behaviors of hard carbon is conducted, yielding the following key findings: 1) the sloping voltage section is presented by the lithium-ion intercalation in the graphitic lattices of hard carbons, whereas it mainly arises from the chemisorption of sodium ions on their inner surfaces constituting closed pores, even if the graphitic lattices are unoccupied; 2) the redox sites for the plateau capacities are the same as those for the closed pores regardless of the alkali ions; 3) the sodiation plateau capacities are mostly determined by the volume of the available closed pore, whereas the lithiation plateau capacities are primarily affected by the intercalation propensity; and 4) the intercalation preference and the plateau capacity have an inverse correlation. These findings from extensive characterizations and theoretical investigations provide a relatively clear elucidation of the electrochemical footprint of hard carbon anodes in relation to the redox mechanisms and storage sites for lithium and sodium ions, thereby providing a more rational design strategy for constructing better hard carbon anodes.
ISSN
0935-9648
URI
https://hdl.handle.net/10371/192251
DOI
https://doi.org/10.1002/adma.202209128
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share