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不同金屬離子價態(tài)的前驅(qū)體制備球形LiNi1/3Mn1/3Co1/3O2的性能比較
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國家自然科學(xué)基金資助（20671031）


Performance Comparison of Spherical LiNi1/3Co1/3Mn1/3O2 Prepared from the Precursor with Metal Ions of Different Valences
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    摘要:

    利用共沉淀法和控制結(jié)晶氧化法在不同條件下分別制備出低價態(tài)球形Ni1/3Co1/3Mn1/3(OH)2和高價態(tài)球形Ni1/3Co1/3Mn1/3OOH前驅(qū)體，并分別和LiOH·H2O在不同溫度燒結(jié)合成出球形鋰離子正極材料Li(Ni1/3Co1/3Mn1/3)O2 。XPS分析表明，制備的高價態(tài)球形Ni1/3Co1/3Mn1/3OOH前驅(qū)體其過渡金屬Ni、Co和Mn的價態(tài)分別是2+，3+, 4+。XRD分析表明，高價態(tài)球形Ni1/3Co1/3Mn1/3OOH前驅(qū)體比低價態(tài)球形Ni1/3Co1/3Mn1/3(O

    Abstract:

    High valency spherical Ni1/3Co1/3Mn1/3OOH and low valency spherical Ni1/3Co1/3Mn1/3(OH)2 precursor powders were synthesized respectively by co-precipitation method and oxidation method at different conditions. And then spherical Li(Ni1/3Co1/3Mn1/3)O2 powders were prepared at different temperature by their precursors, which were sintered with LiOH·H2O. XPS studies indicated that the predominant oxidation states of Ni, Co and Mn in spherical precursor Ni1/3Co1/3Mn1/3OOH were 2+, 3+ and 4+, furthermore, the spherical Li(Ni1/3Co1/3Mn1/3)O2 powders with a well-ordered layered α-NaFeO2 structure and small amount of cation mixing can be synthesized at low temperature by Ni1/3Co1/3Mn1/3OOH, which indicated that the activity of spherical Ni1/3Co1/3Mn1/3OOH is higher than that of spherical Ni1/3Co1/3Mn1/3(OH)2. Charge and discharge capacity showed that the synthesized spherical cathodes by Ni1/3Co1/3Mn1/3OOH delivered higher discharge capacity and better cycling properties

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常照榮,陳中軍,吳 鋒,湯宏偉,朱志紅,上官恩波.不同金屬離子價態(tài)的前驅(qū)體制備球形LiNi1/3Mn1/3Co1/3O2的性能比較[J].稀有金屬材料與工程,2009,38(3):500~505.[Chang Zhaorong, Chen Zhongjun, Wu Feng, Tang Hongwei, Zhu Zhihong, Shangguan Enbo. Performance Comparison of Spherical LiNi1/3Co1/3Mn1/3O2 Prepared from the Precursor with Metal Ions of Different Valences[J]. Rare Metal Materials and Engineering,2009,38(3):500~505.]
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  • 收稿日期:2008-02-07
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