S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Scalable LiCoO2 Nanoparticle Fibers for High Power Lithium Battery Cathodes
- Choi, Dong In; Han, Gi-Beom; Lee, Dong Jin; Park, Jung-Ki; Choi, Jang Wook
- Issue Date
- Journal of the Electrochemical Society, Vol.158 No.10, pp.A1150-A1154
- We report a simple and scalable synthetic method where we use cotton as a template material to grow LiCoO2 nanoparticles along one dimensional micro-fibers with minimized agglomeration. The final three dimensional porous electrode structure and smaller dimensions of nanoparticles result in efficient ionic accessibility as well as decreased ionic/electronic diffusion lengths during battery cycling. Due to this structural advantage, the nanoparticle fiber structure exhibits substantially improved power performance compared to that of the commercial micron-size counterpart. Even at a fast 2 min discharging rate, a capacity of 90 mAh/g is preserved. Excellent cycling performance is also achieved by maintaining the original electrode structure. The synthetic procedures introduced herein are simple and scalable and thus must be readily applicable to the large-scale syntheses of other lithium battery active materials. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3625260] All rights reserved.
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