自身終止高分歧寡聚物(Self-Terminated Oligomers Branched Architecture)簡稱STOBA，此電極添加劑能保護鋰離子電池短路情況。然而STOBA已不適用於現今要求，因此本研究藉由化學分枝法於正極表面上。3-氨基丙基三乙氧基矽烷（APTES）用作偶聯劑以此結合環氧二丙烯酸酯（EA）和巴比土酸（BTA）為EA / BTA。而矽烷化過程藉由乙醇作為溶劑是由於鈷酸鋰的陰極材料的表面上不存在羥基。
純STOBA、STOBA摻EA/BTA、STOBA摻APTES與STOBA摻APTES-EA/BTA，此以上材料為本論文所研究。結果證實，正極材料之改質對電池性能有顯著影響。結果指出正極材料摻APTES-EA/BTA在第一圈放電電容量(充電至4.5V)提升至181.6mAh/gr，並於50圈後依然有89.75%之充放電電容量可逆比。對比於無添加之材料，表面改質有明顯改善於電池之高電壓應用

Self-Terminated Oligomers Branched Architecture, known as STOBA, was found as an electrode additive in order to prevent short circuit in lithium ion battery. However, its reliability is not eligible for current requirement. In this research, a direct chemical branch method on cathode’s surface has been developed. 3-Aminopropyltriethoxysilane (APTES) is used as a coupling agent in which synthesis epoxy diacrylate (EA) and barbituric acid (BTA); EA/BTA. The silanization process was carried on ethanol as a solvent due to the absence of hydroxyl group on the surface of LiCoO2 cathode materials.
In this work, five samples were studied, including bare (uncoated), coated with STOBA, coated with EA/BTA, coated with APTES and STOBA, and coated with APTES and EA/BTA. Our result indicated these modifications on cathode material shown a big impact for the battery performance. In terms of the result, APTES-EA/BTA coated cathode material shows 181.6 mAh/gr capacity at the first cycle (charge to 4.5 V) and life retention remained to 89.75% until 50 cycles. In comparison with bare material, this surface modification leads a significantly improvement for high power applications.

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