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標題: | 常壓噴射電漿製備鋰錳氧化物鈕扣式電池超級電容 Atmospheric pressure plasma jet processed LiMnOx coin-battery type supercapacitors |
作者: | 張恆閔 Heng-Min Chang |
指導教授: | 陳建彰 Jian-Zhang Chen |
關鍵字: | 超級電容器,鋰錳氧化物超級電容器,鈕扣電池式超級電容,常壓噴射式電漿(APPJ), supercapacitor,Li-ion manganese oxide supercapacitors,coin-battery type supercapacitors,Atmospheric Pressure Plasma Jet (APPJ), |
出版年 : | 2024 |
學位: | 碩士 |
摘要: | 本研究利用網印機將氯化鋰-硝酸錳漿料作為活性電極材料網印至由碳布作為電極的基材上,並使用常壓噴射式電漿(Atmospheric Pressure Plasma Jet, APPJ)將漿料燒結至碳布纖維上,以作為超級電容的工作電極,並以銀/氯化銀電極(Ag/AgCl)作為參考電極和使用白金作為對電極,且使用了硫酸鋰(Li2SO4)溶液作為電解液進行三電極系統電化學分析。其中,與利用以相同製程溫度、時間參數的爐管作為熱製程燒結之超級電容進行比較。
為了評估比較鋰錳氧化物超級電容器的性能,運用了循環伏安法(CV)和恆電流充放電法(GCD)等多種方法進行性能量測。電化學實驗结果表明,使用APPJ製程的鋰錳氧化物超級電容器表現出相似於擬電容(PC)效應,而使用爐管製程的超級電容器則較為類似於battery-type的超級電容,其電化學行為更類似於電池。在材料分析方面,從XRD測試中,經APPJ燒結的Li-Mn氧化物結晶度較低,而經爐管處理的Li-Mn氧化物則是較為類似於LiMn2O4結晶相。在SEM中也能發現在碳布基材上,氧化物型態的明顯不同,這可能是導致電化學上的差異的主要原因。 此外,使用APPJ燒結之鋰錳氧化物超級電容電極用於製造鈕扣電池型超級電容器,並使用雙電極系統進行電化學分析,其電解質則是使用1-M Li2SO4凝膠電解質,經測試,使用APPJ燒結之鋰錳氧化物鈕扣電池式超級電容器最大的面積電容量為89.3mF/cm2。 This study utilizes a screen printing process to deposit lithium chloride-manganese nitrate paste as the active electrode material onto a carbon cloth substrate, and employs Atmospheric Pressure Plasma Jet (APPJ) to sinter the paste onto the carbon cloth fibers, serving as the working electrode for a supercapacitor. Ag/AgCl are used as reference electrodes, and Pt is used as the counter electrode. Lithium sulfate (Li2SO4) solution is utilized as the liquid electrolyte for electrochemical analysis in a three-electrode system. A comparison is made with supercapacitors processed the same temperature and time parameters in a tube furnace. To assess the performance of the lithium manganese oxide supercapacitors, various methods such as cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) are employed for performance measurements. Electrochemical experiments indicate that the lithium manganese oxide supercapacitors fabricated using the APPJ process exhibit a behavior similar to pseudocapacitance (PC), whereas those fabricated using the tube furnace process resemble more of a battery-type supercapacitor, with electrochemical behavior resembling that of a battery. Material analysis reveals differences in crystallinity from XRD testing, with lower crystallinity observed in Li-Mn oxides processed by APPJ compared to those treated in a tube furnace, which exhibit crystalline phases of LiMn2O4. SEM images also show distinct oxide morphologies on the carbon cloth substrate, potentially the primary cause for the observed electrochemical differences. Furthermore, the lithium manganese oxide supercapacitor electrodes processed by APPJ are utilized in the fabrication of coin-battery type supercapacitors, and electrochemical analysis is conducted using a dual-electrode system with a 1-M Li2SO4 gel electrolyte. The result reveals a maximum areal capacitance of 89.3 mF/cm2 for the button-type supercapacitors sintered using APPJ. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/93200 |
DOI: | 10.6342/NTU202401808 |
全文授權: | 未授權 |
顯示於系所單位: | 應用力學研究所 |
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