Polyvinylpyrrolidone-assisted synthesis of microscale C-LiFePO4 with high tap density as positive electrode materials for lithium batteries
- Authors
- Oh, Sung Woo; Myung, Seung-Taek; Oh, Seung-Min; Yoon, Chong Seung; Amine, Khalil; Sun, Yang-Kook
- Issue Date
- Jan-2010
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Microscale-LiFePO4; Tap density; Volumetric capacity; Cathode; Lithium batteries
- Citation
- ELECTROCHIMICA ACTA, v.55, no.3, pp.1193 - 1199
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 55
- Number
- 3
- Start Page
- 1193
- End Page
- 1199
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175573
- DOI
- 10.1016/j.electacta.2009.10.007
- ISSN
- 0013-4686
- Abstract
- Carbon-coated LiFePO4 (C-LiFePO4) with micron particle size (6 mu m) and high tap density (1.6 g cm(-3)) was prepared from spherical FePO4 center dot 2H(2)O powder via the co-precipitation method. The C-LiFePO4 powder was calcined at temperatures between 650 and 800 degrees C. The 6 mu m C-LiFePO4 prepared at 800 degrees C exhibited an excellent rate capability, delivering 150 mAh g(-1) on discharge at the 0.1 C-rate and 108 mAh g(-1) at the 5 C-rate. The volumetric capacity of the 6 pm C-LiFePO4 corresponded to 225 mAh cm(-3), since the large secondary particles (6 mu m) C-LiFePO4 Sufficiently allowed tight packing of the particles. The 6 mu m C-LiFePO4 powder with high tap density makes an attractive positive electrode candidate for lithium-ion batteries designed for high energy density.
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