Porous supraparticles of lifepo4 nanorods with carbon for high rate li-ion batteries

Jong Won Yoo, Kan Zhang, Virendra Patil, Jeong Taik Lee, Dae Woong Jung, Lyong Sun Pu, Woong Oh, Won Sub Yoon, Jong Hyeok Park, Gi Ra Yi

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3 Citations (Scopus)

Abstract

Porous supraparticles, or spherical aggregate of LiFePO4 with carbon were prepared by spray-drying of LiFePO4 nanorods and glucose by heat treatment. Rod-like LiFePO4 nanoparticles are prepared by a solvothermal process, which was then sprayed with glucose as a carbon source forming spherical particles of LiFePO4 nanoparticles and glucose. Through the heat treatment under a nitrogen atmosphere, glucose was carbonized4 inside LiFePO4 supraparticles. Due to the interstices between nanoparticles, the spherical aggregates showed fairly high specific surface area (35.0104 m2 g−1). Supraparticles-based electrode exhibited high initial capacity as well as remarkably high rate capability; discharging capacity was 146.15 mAhg−1 at high 10 C (1602.5 mA/g) and 126.58 mAhg−1 at 50 C (8012.5 mA/g). Moreover, cyclic performance at 5 C (801.25 mA/g) was relatively high as well (99% retention after 100 times test). Our porous carbonized LiFePO4 supraparticles have higher packing density or tap density (1.07 g/cm3) than carbonized LiFePO4 nanoparticle (0.78 g/cm3), which is considered an important factor in the practical application.

Original languageEnglish
Pages (from-to)316-324
Number of pages9
JournalMaterials Express
Volume8
Issue number4
DOIs
Publication statusPublished - 2018 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Yoo, J. W., Zhang, K., Patil, V., Lee, J. T., Jung, D. W., Pu, L. S., Oh, W., Yoon, W. S., Park, J. H., & Yi, G. R. (2018). Porous supraparticles of lifepo4 nanorods with carbon for high rate li-ion batteries. Materials Express, 8(4), 316-324. https://doi.org/10.1166/mex.2018.1443