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新型Ti/Al復(fù)合基體對(duì)傳統(tǒng)Ti基PbO2電極性能的改善
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國(guó)家自然科學(xué)基金資助（51074082，51264025）；云南省應(yīng)用基礎(chǔ)研究項(xiàng)目（KKSY201251086）


Improvements on Properties of Traditional Ti-based Lead Dioxide Electrodes by Novel Ti/Al Composited Substrate Electrodes
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    摘要:

    對(duì)比研究新型Ti/Al復(fù)合基體電極Ti/Al/Ti/SnO2+Sb2O4/PbO2和傳統(tǒng)純Ti基體電極Ti/SnO2+Sb2O4/PbO2的性能差異。通過改變Ti/Al復(fù)合基體的制備溫度，探索制備新型電極的最佳工藝條件。運(yùn)用SEM、EDS和XRD表征Ti/Al基體界面層與電極表面β-PbO2活性層的物相形貌。結(jié)合電化學(xué)測(cè)試技術(shù)，分析基體制備溫度對(duì)電極電化學(xué)性能及壽命的影響。結(jié)果表明：Ti/Al復(fù)合基體的電阻率僅為純Ti的1/10,該電極β-PbO2層的晶粒趨于細(xì)化且均勻，活性層比表面積增大，電化學(xué)性能均好于純Ti基體電極。其中，在540 ℃獲得的Ti/Al基體復(fù)合界面相為TiAl3，該復(fù)合基體電極的性能最佳。電極電阻較純Ti基體電極降低43%，極化電位下降18%，在0.2 A/cm2的電流密度下，電位降低了320 mV。經(jīng)強(qiáng)極化測(cè)試，該電極具有最大的交換電流密度j0與最低的析氧超電壓η，工業(yè)使用壽命長(zhǎng)達(dá)10.4年，高出傳統(tǒng)電極50%，具有良好的應(yīng)用前景

    Abstract:

    The comparison studies on performance differences between traditional Ti-based electrode of Ti/SnO2+Sb2O4/PbO2 and novel Ti/Al composited substrate electrode of Ti/Al/Ti/SnO2+Sb2O4/PbO2 were provided. Through changing the sintering temperature of Ti/Al composited substrate, the optimum process conditions for preparing this novel electrode were obtained. The structure and morphology of Ti/Al bonding interface layers and active surface β-PbO2 coatings were characterized by SEM, EDS and XRD. Combined with electrochemical testing technology, the effect of sintering temperature on electrochemical properties and lifetime was analyzed. The results show that this novel Ti/Al composited substrate electrode, whose electrical resistivity is only one tenth of pure Ti substrate, exhibits a smaller grain size, larger surface active areas and better electrochemical properties compared to pure Ti-based electrode. Intermetallic of TiAl3 in Ti/Al composite interface is obtained at the sintering temperature of 540 °C, and it exhibits the best performance. The polarization resistance and polarization potential of Ti/Al composited substrate electrodes decline by 43% and 18%, respectively. The potential decreases by 320 mV compared to Ti-based electrode under the condition of 0.2 A/cm2 current density. This electrode has the best exchange-current density j0 and the lowest oxygen overvoltage η by strong polarization measurement. And the industrial service lifetime of this novel electrode reaches 10.4 years, 50% higher than that of traditional Ti-based electrodes

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張 瑾,竺培顯,代建清,周生剛,曹 勇.新型Ti/Al復(fù)合基體對(duì)傳統(tǒng)Ti基PbO2電極性能的改善[J].稀有金屬材料與工程,2015,44(6):1459~1464.[Zhang Jin, Zhu Peixian, Dai Jianqing, Zhou Shenggang, Cao Yong. Improvements on Properties of Traditional Ti-based Lead Dioxide Electrodes by Novel Ti/Al Composited Substrate Electrodes[J]. Rare Metal Materials and Engineering,2015,44(6):1459~1464.]
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  • 收稿日期:2014-06-21
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  • 在線發(fā)布日期: 2016-01-04
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