BROWSE

Related Researcher

Author's Photo

Kwak, Sang Kyu
Kyu’s MolSim Lab @ UNIST
Research Interests
  • Molecular modeling and simulation, statistical thermodynamics, molecular physics

ITEM VIEW & DOWNLOAD

Revealing the Intercalation Mechanisms of Lithium, Sodium, and Potassium in Hard Carbon

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Revealing the Intercalation Mechanisms of Lithium, Sodium, and Potassium in Hard Carbon
Author
Alvin, StevanusCahyadi, Handi SetiadiHwang, JieunChang, WonyoungKwak, Sang KyuKim, Jaehoon
Issue Date
2020-05
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED ENERGY MATERIALS, v.10, no.20, pp.2000283
Abstract
Hard carbon is the most promising anode material for sodium-ion batteries and potassium-ion batteries owing to its high stability, widespread availability, low-cost, and excellent performance. Understanding the carrier-ion storage mechanism is a prerequisite for developing high-performance electrode materials; however, the underlying ion storage mechanism in hard carbon has been a topic of debate because of its complex structure. Herein, it is demonstrated that the Li+-, Na+-, and K+-ion storage mechanisms in hard carbon are based on the adsorption of ions on the surface of active sites (e.g., defects, edges, and residual heteroatoms) in the sloping voltage region, followed by intercalation into the graphitic layers in the low-voltage plateau region. At a low current density of 3 mA g(-1), the graphitic layers of hard carbon are unlocked to permit Li+-ion intercalation, resulting in a plateau region in the lithium-ion batteries. To gain insights into the ion storage mechanism, experimental observations including various ex situ techniques, a constant-current constant-voltage method, and diffusivity measurements are correlated with the theoretical estimation of changes in carbon structures and insertion voltages during ion insertion obtained using the density functional theory.
URI
https://scholarworks.unist.ac.kr/handle/201301/33018
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.202000283
DOI
10.1002/aenm.202000283
ISSN
1614-6832
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU