Facile SEI Improvement in the Artificial Graphite/LFP Li-Ion System: Via NaPF 6 and KPF 6 Electrolyte Additives.
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| Title: | Facile SEI Improvement in the Artificial Graphite/LFP Li-Ion System: Via NaPF 6 and KPF 6 Electrolyte Additives. |
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| Authors: | Rahbariasl, Sepehr1 (AUTHOR), Rangom, Yverick1 (AUTHOR) yverick.pascal.rangom@uwaterloo.ca |
| Source: | Energies (19961073). Aug2025, Vol. 18 Issue 15, p4058. 14p. |
| Subjects: | Lithium-ion batteries, Lithium cell electrodes, Stabilizing agents, Electric double layer, Anodes |
| Abstract: | In this work, graphite anodes and lithium iron phosphate (LFP) cathodes are used to examine the effects of sodium hexafluorophosphate (NaPF6) and potassium hexafluorophosphate (KPF6) electrolyte additives on the formation of the solid electrolyte interphase and the performance of lithium-ion batteries in both half-cell and full-cell designs. The objective is to assess whether these additives may increase cycle performance, decrease irreversible capacity loss, and improve interfacial stability. Compared to the control electrolyte (1.22 M Lithium hexafluorophosphate (LiPF6)), cells with NaPF6 and KPF6 additives produced less SEI products, which decreased irreversible capacity loss and enhanced initial coulombic efficiency. Following the formation of the solid electrolyte interphase, the specific capacity of the control cell was 607 mA·h/g, with 177 mA·h/g irreversible capacity loss. In contrast, irreversible capacity loss was reduced by 38.98% and 37.85% in cells containing KPF6 and NaPF6 additives, respectively. In full cell cycling, a considerable improvement in capacity retention was achieved by adding NaPF6 and KPF6. The electrolyte, including NaPF6, maintained 67.39% greater capacity than the LiPF6 baseline after 20 cycles, whereas the electrolyte with KPF6 demonstrated a 30.43% improvement, indicating the positive impacts of these additions. X-ray photoelectron spectroscopy verified that sodium (Na+) and potassium (K+) ions were present in the SEI of samples containing NaPF6 and KPF6. While K+ did not intercalate in LFP, cyclic voltammetry confirmed that Na+ intercalated into LFP with negligible impact on the energy storage of full cells. These findings demonstrate that NaPF6 and KPF6 are suitable additions for enhancing lithium-ion battery performance in the popular artificial graphite/LFP system. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 187312710 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Facile SEI Improvement in the Artificial Graphite/LFP Li-Ion System: Via NaPF 6 and KPF 6 Electrolyte Additives. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Rahbariasl%2C+Sepehr%22">Rahbariasl, Sepehr</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rangom%2C+Yverick%22">Rangom, Yverick</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yverick.pascal.rangom@uwaterloo.ca</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Aug2025, Vol. 18 Issue 15, p4058. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Lithium-ion+batteries%22">Lithium-ion batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Lithium+cell+electrodes%22">Lithium cell electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Stabilizing+agents%22">Stabilizing agents</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+double+layer%22">Electric double layer</searchLink><br /><searchLink fieldCode="DE" term="%22Anodes%22">Anodes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this work, graphite anodes and lithium iron phosphate (LFP) cathodes are used to examine the effects of sodium hexafluorophosphate (NaPF6) and potassium hexafluorophosphate (KPF6) electrolyte additives on the formation of the solid electrolyte interphase and the performance of lithium-ion batteries in both half-cell and full-cell designs. The objective is to assess whether these additives may increase cycle performance, decrease irreversible capacity loss, and improve interfacial stability. Compared to the control electrolyte (1.22 M Lithium hexafluorophosphate (LiPF6)), cells with NaPF6 and KPF6 additives produced less SEI products, which decreased irreversible capacity loss and enhanced initial coulombic efficiency. Following the formation of the solid electrolyte interphase, the specific capacity of the control cell was 607 mA·h/g, with 177 mA·h/g irreversible capacity loss. In contrast, irreversible capacity loss was reduced by 38.98% and 37.85% in cells containing KPF6 and NaPF6 additives, respectively. In full cell cycling, a considerable improvement in capacity retention was achieved by adding NaPF6 and KPF6. The electrolyte, including NaPF6, maintained 67.39% greater capacity than the LiPF6 baseline after 20 cycles, whereas the electrolyte with KPF6 demonstrated a 30.43% improvement, indicating the positive impacts of these additions. X-ray photoelectron spectroscopy verified that sodium (Na+) and potassium (K+) ions were present in the SEI of samples containing NaPF6 and KPF6. While K+ did not intercalate in LFP, cyclic voltammetry confirmed that Na+ intercalated into LFP with negligible impact on the energy storage of full cells. These findings demonstrate that NaPF6 and KPF6 are suitable additions for enhancing lithium-ion battery performance in the popular artificial graphite/LFP system. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en18154058 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 4058 Subjects: – SubjectFull: Lithium-ion batteries Type: general – SubjectFull: Lithium cell electrodes Type: general – SubjectFull: Stabilizing agents Type: general – SubjectFull: Electric double layer Type: general – SubjectFull: Anodes Type: general Titles: – TitleFull: Facile SEI Improvement in the Artificial Graphite/LFP Li-Ion System: Via NaPF 6 and KPF 6 Electrolyte Additives. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Rahbariasl, Sepehr – PersonEntity: Name: NameFull: Rangom, Yverick IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 18 – Type: issue Value: 15 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
