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LiCoO2在酸性焙燒環(huán)境中元素賦存形式的演變規(guī)律及分布特征研究
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蘭州理工大學(xué)

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國家自然科學(xué)基金(51264027);國家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(973計劃, 2012CB722806);有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室基金(SKL12003)


Occurrence Evolution and Distribution of Elements in the Sulfating Roasting Process of LiCoO2
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Lanzhou University of Science & Technology

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    摘要:

    系統(tǒng)地了解鈷酸鋰(LiCoO2)在不同介質(zhì)環(huán)境中的物理化學(xué)性質(zhì)有助于從理論上指導(dǎo)該物質(zhì)的合成工藝設(shè)計以及報廢LiCoO2再利用的工藝設(shè)計。本文將LiCoO2與NaHSO4稨2O、LiCoO2與Na2S2O7分別按摩爾比1:3、1:1.5的比例混合后進(jìn)行酸性焙燒，采用TG-DSC-MS、XRD、SEM、EDS研究了焙燒過程中元素賦存形式的演變規(guī)律以及元素分布特征。研究結(jié)果表明：LiCoO2與NaHSO4稨2O、Na2S2O7的混合物在焙燒過程中發(fā)生了明顯的化學(xué)反應(yīng)。焙燒產(chǎn)物中Na元素的賦存形式有Na2SO4、LiNaSO4和Na6Co(SO4)4，Li元素的賦存形式為LiNaSO4，Co元素的賦存形式為Na6Co(SO4)4。焙燒產(chǎn)物致密，形狀不規(guī)則，Co元素在焙燒產(chǎn)物中分布均勻。

    Abstract:

    It is of benefit for synthesizing and reusing process design of LiCoO2 to understand systemically the physicochemical property of LiCoO2 in the different conditions. In this paper, the mixture samples of LiCoO2 and NaHSO4稨2O with the molar ratio of 1:3, LiCoO2 and Na2S2O7 with the molar ratio of 1:1.5 were roasted. Occurrence evolution and distribution of elements in the sulfating roasting process of LiCoO2 have been studied by TG-DSC-MS, XRD, SEM and EDS. The results showed that reactions have been taken place in roasting. Occurrence of Na element is Na2SO4, LiNaSO4 and Na6Co(SO4)4. Occurrence of Li, Co element is LiNaSO4 and Na6Co(SO4)4 respectively in roasting products. The roasting products have a dense tissue and irregular shape. Distribution of Co element is homogeneous in the roasting products.

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王大輝. LiCoO2在酸性焙燒環(huán)境中元素賦存形式的演變規(guī)律及分布特征研究[J].稀有金屬材料與工程,2016,45(6):1500~1504.[wang dahui. Occurrence Evolution and Distribution of Elements in the Sulfating Roasting Process of LiCoO2[J]. Rare Metal Materials and Engineering,2016,45(6):1500~1504.]
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  • 收稿日期:2014-05-19
  • 最后修改日期:2014-07-31
  • 錄用日期:2014-09-28
  • 在線發(fā)布日期: 2016-10-08
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