乙酸钴热分解机理研究

乙酸钴热分解机理研究 The Thermal Decomposition Mechanism of Cobaltous Acetate 张克立 ZHANG Ke\|li 1 2 first-author 贾漫珂 JIA Man\|ke 1 2 汤昊 TANG Hao 1 2 郭光辉 GUO Guang\|hui 1 2 武汉大学化学与分子科学学院 武汉大学化学与分子科学学院 College of Chemistry and Molecular Sciences, Wuhan University College of Chemistry and Molecular Sciences, Wuhan University 武汉大学化学与分子科学学院,湖北,武汉,430072 武汉大学化学与分子科学学院,湖北,武汉,430072 用DTA和TG测定了乙酸钴 [Co（Ac） 2 ·xH2 O]在空气和氮气中的DTA和TG曲线 运用微量X射线粉末衍射技术 ,对乙酸钴热重分解产物进行了表征 DTA、TG和XRD结果表明 ,乙酸钴有 4个结晶水 ,在空气中 ,首先失去结晶水 ,然后分解生成Co3 O4 而在氮气中 ,除失水外 ,乙酸钴分 3步分解 ,第 1步分解失去两个甲基 ,生成草酸钴 ;第 2步草酸钴进一步分解生成Co3 O4,最后生成CoO 研究乙酸钴的热分解机理将为制得高质量的锂离子电池的正负极材料提供帮助 TG and DTA curve of cobaltous acetate was determined by using TG and DTA in the nitrogen and air atmosphere. The thermal decomposition products were characterized by the micro\|method powder X\|ray diffraction. The result indicated that in the air atmosphere the crystal\|water was lost firstly and the cobaltous acetate was further decomposed to Co 3 O 4 ; in the nitrogen atmosphere, however, the decomposition of cobaltous acetate proceeded in four steps: following the lose of the crystal\|water , the cobaltous acetate was decomposed firstly to CoC 2 O 4 , further to Co 3 O 4, and lastly to CoO. These experimental data are in accord very closely with calculated values. The studies on the thermal decomposition mechanism of the cobaltous acetate can offer helps for the synthesis of high quality lithium\|ion battery electrode materials. 乙酸钴 TG DTA 热分解 cobaltous acetate TG DTA thermal decomposition TM911 国家自然科学基金资助项目 （2 0 0 710 2 6） 2002-04-01 2021-04-01 4