| 摘要: | 為因應電動車與儲存再生能源的應用需求，近年來全球對於高效率、低成本、高穩定性與可靠度， 且電極材料來源無虞之中大型儲能系統的需求越來越迫切。著眼於此，本計畫擬規畫三年的時間，以 開發新一代高性價比，且兼長循環充放電使用壽命及高安全性的鈉離子二次電池為目標。計畫中將開 發的關鍵技術包括：(1) 正極材料(包括：包括層狀氧化物、多陰離子化合物，以及有機化合物)的設計 與合成技術、(2) 電極電紡製程技術、(3) 電解質配方(包括：有機系電解質與離子液體電解質)的設計 技術、(4) 電極/電解質儲能反應機制臨場分析技術，以及(5) 全電池設計組裝與測試技術。所開發的 正極材料搭配經優化設計的電解質配方後，目標性能為電容量> 160 mAh/g，放電電壓> 3.5 V (vs. Na+/Na)，且經500 次循環充放電後性能維持率可高於90%。 ;Demands of large-scale energy storage, which is used for electric vehicles and grid-scale energy leveling applications, are significantly increased. An effective energy storage system that combines high performance, low cost, high reliability, and high abundance of electrode materials is urgently needed. In this circumstance, this three-year research project aims at developing a cost-effective, long-life, and high-safety sodium-ion battery to meet the aforementioned requirements. The core techniques to be established in this project include: (1) syntheses of cathode materials (such as layer-structure oxides, polyanionic compounds, and organic compounds), (2) development of electrospinning processes for electrode preparation, (3) designs of electrolyte recipes (such as organic-based electrolytes and ionic liquid electrolytes), (4) development of in-situ analytical techniques (such as in-situ X-ray diffraction, Raman, and X-ray adsorption spectroscopy) to understand the electrode/electrolyte reaction mechanisms, and (5) assembly and performance evaluation of sodium-ion full cells. The target performance of the proposed cathode in an optimum electrolyte includes: specific capacity > 160 mAh/g, discharge potential > 3.5 V (vs. Na+/Na), and capacity retention > 90% after 500 charge-discharge cycles. |
