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首页> 外文期刊>ACS Omega >NiO Nanoparticle Synthesis Using a Triblock Copolymer: Enhanced Magnetization and High Specific Capacitance of Electrodes Prepared from the Powder
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NiO Nanoparticle Synthesis Using a Triblock Copolymer: Enhanced Magnetization and High Specific Capacitance of Electrodes Prepared from the Powder

机译：使用三嵌段共聚物的NiO纳米粒子合成：增强的磁化强度和由粉末制备的电极的高比电容

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摘要

Nickel oxide nanoparticles of diameter ～21 nm were prepared by a sol–gel method using the triblock copolymer poly(ethylene glycol)-b -(propylene glycol)-b -(ethylene glycol). X-ray photoelectron spectroscopy analysis showed the presence of Ni~(2+) and Ni~(3+) ions in the material. The electrical conductivity of this material was due to small polaron hopping between Ni~(2+) and Ni~(3+) sites. The magnetization shown by these nanoparticles was much higher than that reported in the literature. This is ascribed to the presence of Ni~(3+) ions with uncompensated spin moments. Spin-glass behavior was exhibited by the material at 10.7 K. The electrochemical characterization of electrodes comprising of these NiO nanoparticles using cyclic voltammetric measurements showed a specific capacitance value of 810 F/g, the highest reported for this material. These materials will thus form one of the useful multifunctional systems.
机译：使用三嵌段共聚物聚（乙二醇）-b-（丙二醇）-b-（乙二醇），通过溶胶-凝胶法制备了直径约为21 nm的氧化镍纳米粒子。 X射线光电子能谱分析表明材料中存在Ni〜（2+）和Ni〜（3+）离子。该材料的电导率归因于Ni〜（2+）和Ni〜（3+）位之间的小极化子跳跃。这些纳米颗粒显示的磁化强度远高于文献报道的磁化强度。这归因于存在自旋矩未补偿的Ni〜（3+）离子。该材料在10.7 K时表现出自旋玻璃行为。使用循环伏安法测量包含这些NiO纳米颗粒的电极的电化学特性显示，其比电容值为810 F / g，是该材料的最高报道。这些材料因此将形成有用的多功能系统之一。

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