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 language | English |
|---|---|
| Pages (from-to) | 316-324 |
| Number of pages | 9 |
| Journal | Materials Express |
| Volume | 8 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2018 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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Porous supraparticles of lifepo4 nanorods with carbon for high rate li-ion batteries. / Yoo, Jong Won; Zhang, Kan; Patil, Virendra; Lee, Jeong Taik; Jung, Dae Woong; Pu, Lyong Sun; Oh, Woong; Yoon, Won Sub; Park, Jong Hyeok; Yi, Gi Ra.
In: Materials Express, Vol. 8, No. 4, 01.01.2018, p. 316-324.Research output: Contribution to journal › Article
TY - JOUR
T1 - Porous supraparticles of lifepo4 nanorods with carbon for high rate li-ion batteries
AU - Yoo, Jong Won
AU - Zhang, Kan
AU - Patil, Virendra
AU - Lee, Jeong Taik
AU - Jung, Dae Woong
AU - Pu, Lyong Sun
AU - Oh, Woong
AU - Yoon, Won Sub
AU - Park, Jong Hyeok
AU - Yi, Gi Ra
PY - 2018/1/1
Y1 - 2018/1/1
N2 - 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.
AB - 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.
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U2 - 10.1166/mex.2018.1443
DO - 10.1166/mex.2018.1443
M3 - Article
VL - 8
SP - 316
EP - 324
JO - Materials Express
JF - Materials Express
SN - 2158-5849
IS - 4
ER -