隨著科技的發展，電子裝置對於儲能科技的要求日益上升，大量資源不斷的消耗下，儲能科技須往高能量密度且具高環保性的方向前進，因此成本低廉、具高於傳統鋰離子電池 (150-200 Wh kg-1) 3-5 倍能量密度的鋰硫電池 (2600 Wh kg-1) 成為未來最具潛力的電池之一。雖然鋰硫電池具有許多優點，但在商業化的過程中仍有許多挑戰，鋰硫電池在充放電過程中會產生液態的多硫化物，導致活性物質的流失，本研究將排除孔洞材料對於氧化物之物理吸附，專注於應用氧化物的化學吸附性質作為添加劑放於硫正極中。本研究分為兩個部分，一個部分為探討常用的五種功能性氧化物 (二氧化鈦、氧化鋯、二氧化矽、氧化鋅和氧化鋁) 作為正極添加劑對於鋰硫電池性能之影響，結果為二氧化矽對於多硫化物具強吸附性，而氧化鋁具弱吸附性，並且研究氧化物吸附多硫化物之方法。第二部分利用五種含有不同比例的二氧化矽與氧化鋁的無孔廢土作為添加劑，發現有最高比例的二氧化矽的石英磚是最有效的添加劑，最後利用碳材對石英磚作物理改質，以得到具高化學吸附性、電化學催化性與高導電性的硫電極添加劑。

Sulfur cathodes are with low-cost trait and high theoretical capacity to 1,675 mA h g-1; however, the generation of dissolved polysulfide during cycling is the main issue hampering its progress. Herein, we apply various functional oxides as additives in sulfur cathode to trap highly-mobile polysulfide and the metal oxides further demonstrate electrocatalytic-conversion capabilities on it. After excluding the contribution of physical adsorption of polysulfide, the adsorption experiments are conducted and the results indicate that SiO2 shows strong chemisorption ability and the presence of it promotes the conversion of high amount of polysulfides. Afterwards, we apply five waste muds with different proportions of SiO2, and one of the waste muds containing highest content of SiO2 demonstrating as the most effective additive in cathode among others. To further enhance the electrochemical performance of battery, we fabricate carbon-coated quartz as additive in cathode, which provides high chemisorption ability towards polysulfides, electrocatalytic capabilities, and high electrical conductivity.

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