| 第 32 卷第 4 期 |  | Vol. 32 No. 4 | | 2002 年 8 月 | Aug 2002 |
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所屬欄目：其它
尖晶石LiMn_2O_4高溫電化學(xué)性能研究 |
| 唐愛(ài)東; 黃可龍; 趙家昌; Stanford(中南大學(xué)功能材料研究所; 湖南長(cháng)沙; 410083) |
| 摘 要：通過(guò)熔融浸漬、分段燒結的方法用LiOH·H2 O和EMD制得尖晶石型LiMn2 O4 活性材料 ,對材料進(jìn)行了元素分析和XRD結構表征 ,采用最小二乘法計算了樣品的晶格常數 ,結果表明樣品屬于立方尖晶石結構 ,為缺鋰型尖晶石鋰錳氧。樣品在高溫下的充放電曲線(xiàn)和循環(huán)伏安曲線(xiàn)的測定結果表明樣品的首次放電容量為 12 2 8mAh·g- 1,放電電壓為 3 96V ,恒溫充電電壓為 4 0 7V ,二者差值僅為 0 11V ,說(shuō)明以其為正極的電池的極化較小 ,在高溫下具有良好的循環(huán)特性。 |
| 關(guān)鍵詞：鋰離子電池; 尖晶石; 鋰錳氧化物; 高溫性能 |
| 中圖分類(lèi)號：TM912.9 文獻標識碼：A 文章編號：1009-9212(2002)04-0035-03 |
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| Electrochemistrical Performance of Spinel LiMn_2O_4 Cathode Material For Lithium Ion Battery at Elevate Temperature |
| TANG Ai-dong; HUANG Ke-long; ZHAO Jai chang; et al.（Institute of Functional Materials & Chemistry; Central South University; Changsha; 410083; China） |
| Abstract：LiMn 2O 4 cathodes were prepared by melt impregnation method with LiOH·H 2O and EMD.The structure of the material was characterized by XRD and the lattice parameters of the sample was calculated by using least square method.The electrochemical performance of the cathodes at room temperature and elevated temperature was tested.And cyclic voltammetric study was performed at elevated temperature.The results showed that the structure of the sample was confirmed to be cubic spinel structure,The cell polariza... |
| Key words：lithium ion batteries; spinel; lithium manganese oxide; performance |
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基金項目：湖南省重點(diǎn)科技攻關(guān)項目(湘科2000-133)
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收稿日期：2002-07-20
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