Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
An Aging Study of NCA/Si-Graphite Lithium-Ion Cells for Off-Grid Photovoltaic Systems in Bolivia
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
RISE Research Institutes of Sweden.ORCID iD: 0000-0002-1226-0788
KTH Royal Institute of Technology, Sweden; COMSOL AB, Sweden.
Show others and affiliations
2021 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 168, no 10, article id 100541Article in journal (Refereed) Published
Abstract [en]

Performance and aging of lithium-ion 18650 cylindrical cells containing NCA and Si-graphite composite electrodes are investigated during long-term low current rate (∼0.1C) cycling protocol resembling charge/discharge profile of off-grid photovoltaic battery system. The cells are cycled within 30% and 75% state-of-charge ranges (SOC) with low, middle and high cut-off voltages. Electrochemical impedance spectroscopy data of full cylindrical cells exhibit severe aging for cells that have been cycled at higher cut-off voltage of 4.2 V. Symmetric cell impedance from each electrode shows that aging of NCA is dominant over aging of Si-graphite. Using a Newman-based impedance model, the NCA symmetrical cells' impedance spectra are parameterized to evaluate the aging modes. The resulting parameterization confirms increased particles' surface film resistance due to possible electrolyte oxidation and tortuosity increase at high cut-off voltages. Cycling the cells with middle and low cut-off voltages causes few significant changes when compared to calendar-aged samples. This opens up the possibility to significantly increase battery lifetime for small photovoltaic battery systems in rural areas of Bolivia. © 2021 The Author(s). 

Place, publisher, year, edition, pages
IOP Publishing Ltd , 2021. Vol. 168, no 10, article id 100541
Keywords [en]
Battery management systems, Charging (batteries), Electrochemical impedance spectroscopy, Electrolytes, Graphite electrodes, Lithium, Lithium-ion batteries, Photovoltaic cells, Aging studies, Cell impedance, Cutoff voltage, Cylindrical cells, Lithium ions, Lithium-ion cells, Off-grids, Performance, Photovoltaic systems, Photovoltaic/battery systems, Graphite
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:ri:diva-56922DOI: 10.1149/1945-7111/ac315dScopus ID: 2-s2.0-85118883638OAI: oai:DiVA.org:ri-56922DiVA, id: diva2:1613296
Available from: 2021-11-22 Created: 2021-11-22 Last updated: 2021-11-22Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Lundblad, Anders Olof

Search in DiVA

By author/editor
Lundblad, Anders Olof
By organisation
RISE Research Institutes of Sweden
In the same journal
Journal of the Electrochemical Society
Materials Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 64 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf