《利用溶膠-凝膠法制備納米級高性能錳酸鋰的最佳燒結(jié)工藝研究》12000字（論文）

利用溶膠-凝膠法制備納米級高性能錳酸鋰的最佳燒結(jié)工藝研究摘要如今鋰離子電池應(yīng)用極為廣泛，但其本身能量密度還是無法滿足電動汽車、航空航天等大型設(shè)備的應(yīng)用需要。層狀Li2MnO3正極材料具有高電電壓平臺、高能量密度、價格低廉和安全性高等優(yōu)點，被人們廣泛認(rèn)可并研究。但是該材料存在電子導(dǎo)電性差和氧的不可逆損失的缺點，同時伴隨著結(jié)構(gòu)的不可逆轉(zhuǎn)變，導(dǎo)致循環(huán)穩(wěn)定性降低，放電比容量減小。本文利用溶膠-凝膠法制備納米級的層狀Li2MnO3，通過制備不同煅燒溫度與保溫時間的正極材料，探究最佳的燒結(jié)工藝。結(jié)果表明，煅燒溫度650℃，保溫時間5h為最佳燒結(jié)工藝，此時首圈放電比容量可達(dá)283.8mAh·g-1，循環(huán)50次后的放電比容量可保持在74.3mAh·g-1。關(guān)鍵詞：Li2MnO3；層狀材料；溶膠-凝膠法；電化學(xué)性能目錄63511緒論 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