纳米Pb(PbO)/活性炭的制备及其在H2SO4电解液中的电化学行为

doi:10.3724/SP.J.1077.2013.13165

摘要/Abstract

摘要： 通过对活性炭依次进行Pb(Ⅱ)吸附、PbO沉积、还原分解等处理, 制备了nano-Pb(PbO)/活性炭复合材料。采用XRD、EDS、SEM等手段对其进行了物相及微观结构表征, 结果发现, 纳米级Pb、PbO颗粒均匀地分布在活性炭表面。将该复合材料制备成电极, 置于H₂SO₄溶液中进行电化学性能测试分析, 结果表明, nano-Pb(PbO)/活性炭具有较高的析氢过电位、良好的导电性, 并能提供一定的氧化还原电流, 且非法拉第比容量损失较小。在铅酸电池负极铅膏中添加5wt%的nano-Pb(PbO)/活性炭制备成相应铅炭超级电池, 在电池放电至60%荷电状态(SOC)时进行高倍率循环实验, 结果发现, 其循环寿命相比于普通铅酸蓄电池提高了4~5倍。

关键词: 活性炭, Nano-Pb, 复合材料, 析氢, 超级电池

Abstract: Nano-Pb(PbO)/activated carbon (nano-Pb(PbO)/AC) was prepared by the processes of adsorption of Pb²⁺, deposition of PbO and further reductive decomposition in the pores of activated carbon. The composite was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results showed that Pb and PbO nano-crystals were dispersed uniformly on the surface of activated carbon particles. The electrochemical measurements in H₂SO₄ aqueous solution showed that nano-Pb(PbO)/AC possessed high over-potential of hydrogen evolution, high electrical conductivity, and could provid a certain degree of oxidation-reduction current. Moreover, there was less non-faradic capacitance loss. Ultra-battery was prepared by adding 5wt% of Nano-Pb(PbO)/AC to the negative paste. Initially, the battery was discharged to 60%SOC and then subjected to the test of cycling performance at high rate. The cycle life of the ultra-battery was 4 to 5 times higher than that of traditional lead-acid battery.

Key words: activated carbon, nano-Pb, composite material, hydrogen evolution, ultra-batteries

中图分类号:

O646

高云芳, 宋云龙, 任冬雷, 王艳平. 纳米Pb(PbO)/活性炭的制备及其在H₂SO₄电解液中的电化学行为[J]. 无机材料学报, 2013, 28(12): 1301-1306.

GAO Yun-Fang, SONG Yun-Long, REN Dong-Lei, WANG Yan-Ping. Preparation and Electrochemical Behavior in H₂SO₄ Electrolyte of Nano-Pb(PbO)/Activated Carbon[J]. Journal of Inorganic Materials, 2013, 28(12): 1301-1306.

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纳米Pb(PbO)/活性炭的制备及其在H₂SO₄电解液中的电化学行为

Preparation and Electrochemical Behavior in H₂SO₄ Electrolyte of Nano-Pb(PbO)/Activated Carbon

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