本文選題：熱電池 + 釩酸銅�。� 參考：《沈陽理工大學》2017年碩士論文

【摘要】：熱電池單體電池主要由負極、電解質(zhì)和正極三部分組成。正極材料作為決定熱電池性能的重要因素之一,研究和開發(fā)更高性能的正極材料是目前提高和發(fā)展熱電池的有效途徑和關(guān)鍵所在。釩酸銅正極材料由于其電子導電性較差,因此對該材料進行摻雜改性,提高其放電性能。本文通過溶膠凝膠法和沉淀法分別制備Mo摻雜Cu_3V_2O_8正極材料,通過溶膠凝膠法制備Mo摻雜Cu_5V_2O_(10)正極材料,采用XRD、SEM、DTA等分析手段對摻雜材料進行表征,采用粉末壓片工藝制備單體電池,并研究了不同的合成條件等因素對單體電池放電性能的影響。結(jié)果表明,溶膠凝膠法合成的Mo摻雜Cu_3V_2O_8正極材料在摻Mo量為0.15、煅燒溫度為700℃和煅燒時間為10h時放電性能最佳,此時制備的正極材料初始放電電壓為2.8885V,截至2.0V時正極活性物質(zhì)的比容量為225.2mAh/g。在正極材料中添加四元兼容電解質(zhì)及導電劑可以提高其放電性能,實驗表明,四元兼容電解質(zhì)最佳添加量為35%,導電劑Ag的最佳添加量為10%。采用沉淀法合成Mo摻雜Cu_3V_2O_8正極材料在摻Mo量為0.15、沉淀液pH為7、煅燒溫度為700℃和煅燒時間為10h時放電性能最佳,此時制備的正極材料放電電壓可達2.75V,放電平臺平穩(wěn),截止電壓2.0V時正極活性物質(zhì)的比容量為210m Ah/g。在該材料中電解質(zhì)最佳添加量為25%,導電劑Ag的最佳添加量為10%。采用溶膠凝膠法合成的Mo摻雜Cu_5V_2O_(10)正極材料在摻Mo量為0.15、煅燒溫度為750℃和煅燒時間為10h時放電性能最佳,此時制備的正極材料初始電壓為2.8423V,截止2V時的正極活性物質(zhì)比容量為229.5mAh/g。該材料中電解質(zhì)最佳添加量為25%,導電劑Ag的最佳添加量為10%。摻Mo量要保持適合的值,過低和過高都不利于材料放電;煅燒溫度對材料的放電性能有較大影響,煅燒溫度越高反應越充分;煅燒時間對材料的放電性能影響不大。實驗表明,溶膠凝膠法制備的正極材料放電性能較好。
[Abstract]:The single cell of thermal battery is mainly composed of negative electrode, electrolyte and positive electrode. As one of the important factors to determine the performance of thermal batteries, the research and development of cathode materials with higher performance is an effective way to improve and develop thermal batteries. Because of its poor electronic conductivity, copper vanadate cathode material was doped and modified to improve its discharge performance. In this paper, Mo-doped Cu_3V_2O_8 cathode materials were prepared by sol-gel method and precipitation method, and Mo doped Cu5VS2OD _ (10) cathode materials were prepared by sol-gel method. The doped materials were characterized by XRDD-SEMT-DTA and single cell was prepared by powder pressing process. The effect of different synthesis conditions on the discharge performance of single cell was studied. The results show that the Mo-doped Cu_3V_2O_8 cathode material synthesized by sol-gel method has the best discharge performance when Mo content is 0.15, calcination temperature is 700 鈩，

本文編號：1959468