阴离子(NO3-/Cl-/SO42-)对Ni(OH)2晶型及其结构稳定性的影响

doi:10.11868/j.issn.1001-4381.2015.08.005

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摘要

采用超声波辅助沉淀法分别在单元掺杂、二元掺杂和不掺杂三种情况下制备了三种不同镍源的纳米氢氧化镍,研究三种阴离子(NO₃^-,Cl^-,SO₄^2-)对产物晶相结构及稳定性的影响。结果表明:未掺杂时,半径较大的SO₄^2-离子有利于α-Ni(OH)₂的形成;在单掺杂Co(Ni²⁺:Co²⁺=1:0.20)时,NO₃^-离子不仅有利于α-Ni(OH)₂的形成,而且可以使α-Ni(OH)₂在碱液中保持较高的稳定性;当复合掺杂Co/Cu(Ni²⁺:Co²⁺:Cu²⁺=1:0.15:0.05)时,三种镍源制得的样品均为纯α-Ni(OH)₂结构,但以Ni(NO₃)₂为镍源的α-Ni(OH)₂在碱液中结构稳定性较高,NiCl₂次之,NiSO₄较差。可见,α-Ni(OH)₂结构及稳定性既与掺杂情况有关,也与阴离子密切相关。

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	韩全勇
	朱燕娟
	苗成成
	罗洁
	张伟
	赵腾起
	张春华

关键词 ：镍源, 氢氧化镍, 结构稳定性, 阴离子, α-Ni(OH)₂晶相

Abstract：

Nanometer nickel hydroxide with three kinds of nickel sources were synthesized by ultrasonic-assisted precipitation under single, double and no doping condition. The effect of three anions (NO₃^-, Cl^-, SO₄^2-) which comes from nickel sources on the crystal structure and stability of samples were investigated. The results indicate that the larger ion radius SO₄^2- is more in favor of the formation of α-Ni(OH)₂ in the case of undoping. In the single doped Co samples(Ni²⁺:Co²⁺=1:0.20), NO₃^- anion is not only conducive to form α-Ni(OH)₂, but also can keep high stability of α-Ni(OH)₂ in alkali solution. When co-doped Co/Cu(Ni²⁺:Co²⁺:Cu²⁺=1:0.15:0.05), the samples which were prepared using three nickel sources are all pure α-Ni(OH)₂ structures, however, the stability of the nickel nitrate doped α-Ni(OH)₂ in alkali solution is higher, which is using Ni(NO₃)₂ as nickel source, NiCl₂ is lower, NiSO₄ is the lowest. It can be concluded that the structure and stability of α-Ni(OH)₂ is not only related to doping condition, but also related with anions.

Key words： nickel source nickel hydroxide structural stability anion crystal phase of α-Ni(OH)₂

收稿日期: 2014-05-09 出版日期: 2015-08-17

基金资助:国家自然科学基金资助项目(11304045);广东省自然科学基金资助项目(S2012010009955);广州市科技计划资助项目(2013j4100011)

通讯作者: 朱燕娟 E-mail: yanjuanzhu007@126.com

作者简介: 朱燕娟(1958-),女,教授,硕士生导师,研究方向:镍氢电池正极材料改性,联系地址:广州市番禺区大学城外环西路100号广东工业大学实验三号楼308室(510006),E-mail:yanjuanzhu007@126.com

引用本文:

韩全勇, 朱燕娟, 苗成成, 罗洁, 张伟, 赵腾起, 张春华. 阴离子(NO₃^-/Cl^-/SO₄^2-)对Ni(OH)₂晶型及其结构稳定性的影响[J]. 材料工程, 2015, 43(8): 25-30.
Quan-yong HAN, Yan-juan ZHU, Cheng-cheng MIAO, Jie LUO, Wei ZHANG, Teng-qi ZHAO, Chun-hua ZHANG. Effect of Anion(NO₃^-/Cl^-/SO₄^2-) on Crystal Type and Structural Stability of Ni(OH)₂. Journal of Materials Engineering, 2015, 43(8): 25-30.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.08.005 或 http://jme.biam.ac.cn/CN/Y2015/V43/I8/25

Fig.1 未掺杂情况下不同镍源制备的样品XRD图谱

Fig.2 未掺杂情况下不同镍源制备的样品FTIR图谱

Fig.3 钴掺杂不同镍源制得的样品XRD图谱

Fig.4 Co掺杂不同镍源制得的样品FTIR图谱

Fig.5 Co/Cu共掺杂不同镍源所得样品XRD图谱

Fig.6 Co/Cu共掺杂不同镍源所得样品FTIR图谱

Fig.7 Co掺杂样品浸泡前后的XRD图谱

Fig.8 Co掺杂样品浸泡前后的FTIR图谱

Fig.9 Co/Cu共掺杂样品浸泡前后的XRD图谱

Fig.10 Co/Cu共掺杂样品浸泡前后的FTIR图谱

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