(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 采用提取的含少量Co3O4的LiCoO2為原料，在不同溫度下合成正極材料LiCoO2，燒結(jié)時(shí)間為12 h，并采用XRD和SEM技術(shù)研究合成的LiCoO2的晶相結(jié)構(gòu)與微觀形貌。結(jié)果發(fā)現(xiàn)：燒結(jié)溫度對(duì)LiCoO2的晶體結(jié)構(gòu)影響較大，燒結(jié)溫度越高，LiCoO2的層狀結(jié)構(gòu)發(fā)育越完整。循環(huán)伏安曲線很好地反映了再生LiCoO2的脫/嵌鋰行為。將LiCoO2樣品做成電池進(jìn)行電化學(xué)檢測(cè)，結(jié)果發(fā)現(xiàn)，燒結(jié)溫度為850 ℃的樣品首次放電容量為151mA∙h/g，30次循環(huán)之后，放電容量仍有141mA∙h/g，表現(xiàn)出良好的電化學(xué)性能。
關(guān)鍵字: 鈷酸鋰；正極材料；再生；電化學(xué)性能
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:LiCoO2 was synthesized at different temperatures from recycled power containing little Co3O4, and the calcinating time was 12 h. The structure and morphology of resulted samples were observed by XRD and SEM, respectively. The results show that the calcinating temperature has great significant on the structure of LiCoO2. The layered structure of LiCoO2 is improved when the calcinating temperature increases. The cyclic voltammagrams curve shows the exaction/insertion performance of LiCoO2 well. The initial discharge capacity of LiCoO2 calcined at 850 ℃ is 151 mA∙h/g. The discharge capacity after cycled 30 times is still 141 mA∙h/g.
Key words: lithium cobalt oxide; cathode materials; recovery; electrochemical performance
