鋰電池高容量複合正極材料最佳製程研究

Abstract

隨著下世代3C整合產品（智慧型手機、平板電腦）及高功率系統產品（電動機車、混合動力電動車、電動機車、智慧型機器人、再生能源之大型儲電系統等）應用普及化的電源需求，高功率、高安全性、高能量密度電池是必要條件。為滿足此條件，全世界皆已積極投入創新鋰電池材料之製程技術開發，而高容量更是未來鋰電池發展的主流方向。 電池的正極材料對於電池的性能優劣影響最甚，而傳統的鋰鈷、鋰鎳、鋰錳，甚至是磷酸鋰鐵等正極材料都有著各自的缺點，難以滿足未來高容量、高能量密度的電子產品或電動機械的需求，新型固溶體高容量富鋰層狀正極材料具有較高電容量及優秀的循環穩定性，尤其高容量的特性最引起大家廣泛的注意，是非常有潛力的明日之星正極材料，本研究介紹了富鋰正極材料(x Li[Li1/3Mn2/3]O2• (1-x)LiMO2)的結構、合成方式、並探討其最佳製程以提高其電化學特性，做為未來研究的重點方向參考。

The high power, high safety, and high energy density are the key to the popularization and application of lithium batteries for the next generation 3C integrated products (intelligent mobile phones, tablet computers) and high power products (electric vehicles, hybrid electric vehicles, electric scooters, intelligent robots, energy storage systems for renewable energy and grid applications). In order to meet these requirements, the whole world has been actively involved in technology development and innovation of lithium battery materials. Currently, the high capacity electrode materials of lithium batteries is the major research focuses. Cathode materials play a crucial role in performances of Li-ion batteries. The conventional cathode materials such as LiCoO2, LiNiO2, LiMn2O4, and LiFePO4 are not able to meet the demand of high energy density Li-batteries for the above-mentioned applications. New lithium-rich layered-layered composite cathode materials with high capacity and excellent cycle life have attracted the most widespread attentions. In this research, I will focus on synthesis, processing, and characterizations of the composite cathode material (x Li[Li1/3Mn2/3]O2• (1-x)LiMO2). The effect of synthesis conditions on the structure and electrochemical properties of the material will be discussed.