NDLI: Controlling Li Dendritic Growth in Graphite Anodes by Potassium Electrolyte Additives for Li-Ion Batteries.

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Controlling Li Dendritic Growth in Graphite Anodes by Potassium Electrolyte Additives for Li-Ion Batteries.

Content Provider	Europe PMC
Author	Moharana, Sanghamitra West, Geoff Walker, Marc Yan, Xinjie S. Loveridge, Melanie
Copyright Year	2022
Abstract	Fast charging promotesLi dendrite formation and itsgrowth on graphite anodes, whichaffects cell performance in Li-ion batteries (LIBs). This work reportsthe formation of a robust SEI layer by introducing a KPF6 inorganic additive into the electrolyte. An optimal concentrationof 0.001 M KPF6 effectively inhibits the growth of Li dendritesat 2C charging rates, compared with a commercial electrolyte. Electrolytescontaining a KPF6 additive are shown here to deliver dualeffects to mitigate the growth of dendrites. A thin LiF-rich SEI layeris formed on graphite, which blocks the electron leakage pathways.Additionally, K+ resides at defect sites (such as particleboundaries) due to its faster diffusion rate and blocks the incomingLi+ and restricts the growth of Li dendrites. The electrolytewith optimum concentration of KPF6, i.e., 0.001 M, effectivelydirects Li+ transport through the thin, durable, and lowresistance LiF-rich SEI layer. This has implications for fast chargingthrough optimization of the electrode/electrolyte interphase by controllingadditive concentrations.
ISSN	19448244
Journal	ACS Applied Materials & Interfaces
Volume Number	14
PubMed Central reference number	PMC9501903
Issue Number	37
PubMed reference number	36089861
e-ISSN	19448252
DOI	10.1021/acsami.2c11175
Language	English
Publisher	American Chemical Society
Publisher Date	2022-09-12
Access Restriction	Open
Rights License	Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2022 The Authors. Published by American Chemical Society
Subject Keyword	fast charging potassium cation lithium dendrites solid electrolyte interphase lithium fluoride lithium-ion batteries
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Medicine Materials Science

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