| 摘要: | 近年來，普魯士藍以及類普魯士藍研究做為在二次電池的材料中占了許多的關注度，原因大致如下：製作成本低、因普魯士藍的立方晶體結構導致其擁有高導電率，以及在充放電過程中的氧化還原反應對結構造成的變化小而有極長的循環壽命。
此研究大致分為兩部分，第一部分為製備普魯士藍，通過沉澱法合成Na-CoFe及Na-FeFe，兩者皆為在室溫的情況下製備，而後使用X-Ray Diffractin 分析樣品與參雜之奈米金屬粒子的晶體結構與粒徑分布、大小。第二部分為研究Na-CoFe、Na-FeFe添加藉由物理氣相沉積PVD 所製備而成的奈米金屬粒子，如銀、鎳等…元素，後製備成電極片，並進行二次鈉電池製備，觀察其充放電表現，包括初始比容量、衰減比例、氧化還原電壓峰值及充放電速率。
在第一部分的實驗中，先藉由X-Ray Diffraction 得到Na-CoFe及Na-FeFe的X光繞射圖，根據圖中繞射峰所出現的位置，利用GSAS軟體進行擬合，確認普魯士藍及金屬粒子之晶體結構並得出其晶格常數、分子鍵長、原子位置、電子密度、電子密度等數據。並藉由繞射峰之寬化長度，藉由Origin軟體以統計計算的方式，計算出Na-FeFe、Na-CoFe與金屬粒子之平均粒徑大小及粒徑分布情形。
在第二部分的實驗中，將普魯士藍奈米顆粒製備成電池正極極片時，分別參雜鎳、銀、錫等…金屬奈米粒子，並組裝成二次鈉電池後，利用電池性能分析儀進行充放電，進行定電流測試，得到電池之累積電荷、電壓、時間、衰退率等數據，並藉由Origin軟體分析，製作出其電池數據相關之圖型。並討論其參雜之金屬粒子的不同，比較其電池充放電效率優劣。
;This research can be broadly divided into two parts. The first part involves the synthesis of Prussian blue through a precipitation method, specifically Na-CoFe and Na-FeFe prepared at room temperature. X-ray diffraction analysis is then employed to examine the crystal structure and particle size distribution of the samples.The second part focuses on studying the addition of nanoscale metal particles such as silver and nickel to Na-CoFe and Na-FeFe.These nanoscale metal particles made using physical vapor deposition (PVD) to fabricate. Then fabricate electrode flim.These films are used in the fabrication of secondary sodium batteries, and their electrochemical performance is evaluated. This evaluation includes analyzing the initial specific capacity, capacity decay, peak oxidation-reduction voltage, and charge-discharge rate.
In the experimental phase of the first part, X-ray diffraction patterns of Na-CoFe and Na-FeFe are obtained, and fitting analysis using software like GSAS is conducted to determine the crystal structure of Prussian blue and the metal particles. Various data, such as lattice constants, bond lengths, atomic positions, electron density, and other parameters, are derived from the analysis. The average particle size and size distribution of Na-FeFe, Na-CoFe, and the metal particles are calculated statistically using the broadening of diffraction peaks, with the assistance of software like Origin.
In the experimental phase of the second part, Prussian blue nanoparticles are prepared and incorporated into the positive electrode films of the batteries. Different metal nanoparticles such as nickel, silver, and tin are added separately. The assembled secondary sodium batteries are subjected to charge-discharge cycles using an electrochemical performance analyzer. Data such as cumulative charge, voltage, time, and decay rate are collected, and analysis using software like Origin helps generate battery-related graphs. The performance of the batteries with different metal particle additives is compared. |
