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Author

Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Who will drive electric vehicles, olivine or spinel?

Cited 153 times inthomson ciCited 142 times inthomson ci
Title
Who will drive electric vehicles, olivine or spinel?
Author
Park, Ok KyungCho, YonghyunLee, SanghanYoo, Ho-ChunSong, Hyun-KonCho, Jaephil
Keywords
LITHIUM-ION BATTERIES; HIGH-TEMPERATURE PERFORMANCE; IMPROVED CAPACITY RETENTION; LIMN2O4 SPINEL; CATHODE MATERIALS; HIGH-POWER; ELECTROCHEMICAL PROPERTIES; DIFFUSION-COEFFICIENT; ELEVATED-TEMPERATURES; POSITIVE ELECTRODE
Issue Date
201105
Publisher
ROYAL SOC CHEMISTRY
Citation
ENERGY & ENVIRONMENTAL SCIENCE, v.4, no.5, pp.1621 - 1633
Abstract
Lithium iron phosphate olivine (LFP) and lithium manganese oxide spinel (LMO) are competitive and complementary to each other as cathode materials for lithium ion batteries, especially for use in hybrid electric vehicles and electric vehicles. Interest in these materials, due to their low cost and high safety, has pushed research and development forward and toward high performance in terms of rate capability and capacity retention or cyclability at a high temperature of around 60 degrees C. From the view point of basic properties, LFP shows a higher gravimetric capacity while LMO has better conductivities, both electrically and ionically. According to our comparison experiments, depending on the material properties and operational potential window, LFP was favored for fast charging while LMO led to better discharge performances. Capacity fading at high temperatures due to metal dissolution was revealed to be the most problematic issue of LFP and LMO-based cells for electric vehicles (EVs), with thicker electrodes, in the case of no additives in the electrolyte and no coating to prevent metal dissolution on cathode materials. Various strategies to enhance the properties of LFP and LMO are ready for the realization of EVs in the near future.
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DOI
http://dx.doi.org/10.1039/c0ee00559b
ISSN
1754-5692
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