| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014) | |
| Energy Harvesting & Storage | Tuesday Sessions |
| Session EH-TuP |
| Session: | Energy Harvesting & Storage Poster Session |
| Presenter: | YongJoon Park, Kyonggi University, Republic of Korea |
| Authors: | S.B. Lim, Kyonggi University Y.J. Park, Kyonggi University, Republic of Korea |
| Correspondent: | Click to Email |
Since the commercialization of lithium ion battery, development of cathode materials with high capacity has been one of the important factors for enhancing the performance of that. Lithium rich compounds are promising cathode materials due to their high capacity for satisfying demand of high-capacity batteries. However, they have several disadvantages to overcome for commercialization such as poor rate capability, low cyclic performance, and low stability. In this study, we prepared nano-sized Li[Li0.2Ni0.16Mn0.56Co0.08]O2/carbon composite for enhanced electrochemical performance such as rate capability. A general method to improve the surface electronic conductivity and enhance the rate capability of cathode is carbon coating. The carbon coating by in-situ carbonization from organic precursors has been successfully applied to LiFePO4. However, it is difficult to apply to Li-rich compounds because they will lose oxygen during carbonization. That is why we introduced composite between cathode and carbon, instead of carbon coating. In this work, super P, a commercial carbon, was composed with nano-sized Li[Li0.2Ni0.16Mn0.56Co0.08]O2. Nano-sized powders were synthesized by combustion method using surfactants (HPC and Gelatin) to disperse the granule particles [1-3]. The polydopamine pre-coating layer was used as a binding agent between cathode powder and super P [4-8]. Nano-sized Li[Li0.2Ni0.16Mn0.56Co0.08]O2/Super P composite is expected to exhibit improved rate capability because of dispersed nano-sized lithium rich particles and good electronic conductivity attributed to Super P.
References
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