Nd<sub>2</sub>Fe<sub>14</sub>B/PANI磁粉的合成、表征及氧传递作用

引用本文: 史继诚, 徐洪峰, 卢璐, 傅杰. Nd₂Fe₁₄B/PANI磁粉的合成、表征及氧传递作用[J]. 物理化学学报, 2011, 27(11): 2625-2631. doi: 10.3866/PKU.WHXB20111133 shu

Citation: SHI Ji-Cheng, XU Hong-Feng, LU Lu, FU Jie. Synthesis and Characterization of Nd₂Fe₁₄B/PANI and Its Function during the Oxygen Transfer Process[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2625-2631. doi: 10.3866/PKU.WHXB20111133 shu

Nd₂Fe₁₄B/PANI磁粉的合成、表征及氧传递作用

基金项目:
国家自然科学基金(20976018) (20976018)

辽宁省高校优秀人才支持计划(2008RC09)资助项目 (2008RC09)

摘要: 经球磨和原位聚合法合成了Nd₂Fe₁₄B/PANI磁粉, 采用X射线衍射(XRD)、傅里叶变换红外(FTIR)光谱、扫描电镜(SEM)、振动样品磁强计(VSM)对样品进行了表征, 用电化学三电极体系和锌空电池考察了Nd₂Fe₁₄B/PANI 材料在氧传递中的作用. 结果表明: Nd₂Fe₁₄B/PANI 是一维片状纳米材料, 电导率0.54 S·cm^-1, 内禀矫顽力和剩余磁化强度为149.57 kA·m^-1、20.27 A·m²·kg^-1; Nd₂Fe₁₄B/PANI 负载密度为0.40 mg·cm^-2时, 磁性电极的双电层电容增大, 传荷电阻减小, 磁性锌空电池的极化电流较大; 负载密度为3.60 mg·cm^-2时, 磁性电极的双电层电容减小, 传荷电阻增大, 磁性锌空电池的极化电流较小. Nd₂Fe₁₄B/PANI 负载密度小于0.89 mg·cm^-2时, 微磁场促进氧的传质, 提高锌空电池的放电性能; 高于3.56 mg·cm^-2时, 微磁场抑制氧的传质, 降低锌空电池的放电性能; Nd₂Fe₁₄B/PANI中的PANI提高锌空电池的放电性能.

关键词:

English

Synthesis and Characterization of Nd₂Fe₁₄B/PANI and Its Function during the Oxygen Transfer Process

1.
College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China
Received Date: 25 July 2011
Available Online: 27 October 2011
Fund Project:
国家自然科学基金(20976018)

辽宁省高校优秀人才支持计划(2008RC09)资助项目

Abstract: Nd₂Fe₁₄B/PANI magnetic powder was prepared by ball milling and in-situ polymerization. The samples were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The function of Nd₂Fe₁₄B/PANI in the oxygen transfer process was determined using an electrochemical three electrode system and a zinc air battery. The results showed that Nd₂Fe₁₄B/PANI was a one-dimensional lamellar nanostructured material with an electrical conductivity of 0.54 S·cm^-1, an intrinsic coercive force of 149.57 kA·m^-1, and a residual magnetization of 20.27 A·m²·kg^-1. For a 0.40 mg·cm^-2 Nd₂Fe₁₄B/PANI load density the magnetic electrode reached a higher double electric layer capacitance, a smaller charge transfer resistance than a nonmagnetic electrode and the polarization current of the magnetic zinc air battery also increased. For a 3.60 mg·cm^-2 load density the results were contrary to those of the 0.40 mg· cm^-2 load density test. We found that the micro magnetic field promoted the oxygen transfer process and improved the zinc air battery performance when the Nd₂Fe₁₄B/PANI load density was less than 0.89 mg· cm^-2. At a load density higher than 3.56 mg·cm^-2, the micro magnetic field inhibited oxygen transfer and reduced the zinc air battery discharge performance. The PANI in this material also improved the zinc air battery discharge performance.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

Nd₂Fe₁₄B/PANI磁粉的合成、表征及氧传递作用

English

Synthesis and Characterization of Nd₂Fe₁₄B/PANI and Its Function during the Oxygen Transfer Process

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