| Abstract Scope |
In this study, the electrochemical performance of LiCoO₂ (LCO) cathodes was enhanced, and the electrochemical behavior according to dielectric properties was investigated by applying coatings of BaTiO₃ (BT), a ferroelectric material, and Ba(Zr,Ti)O₃ (BZT), a paraelectric material, to the LCO cathodes. The battery performance was compared with dielectric material contents of 0.1 wt% and 1 wt%. In addition, charge-discharge tests were conducted at cutoff voltages of 4.3V and 4.5V to evaluate the stable electrochemical performance of the coated cells under ultra-high voltage conditions.According to the EIS results, the resistance of LCO@BT was reduced by 20% compared to pristine LCO, while LCO@BZT showed an improvement of 46.04%, indicating that the paraelectric material provides superior battery performance. This study confirms that dielectric material coatings can mitigate structural degradation of LCO and suppress electrolyte decomposition, thereby enhancing the battery’s lifespan and safety. This approach presents a promising modification strategy for high-performance lithium-ion batteries.Such performance improvements are particularly important for applications requiring both high power output and long-term stability, indicating that coated LCO cathodes could be promising candidates for next-generation energy storage systems. |