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

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


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
Issue number4
Publication statusPublished - 2018

Bibliographical note

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© 2018 by American Scientific Publishers All rights reserved.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)


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