Pb-PL/AgNPs复合阳极的制备及电化学性能

材料科学与工程

Pb-PL/AgNPs复合阳极的制备及电化学性能

尹云龙，

杨长江，

李灿，

仇强，

张利华

中国有色金属学报

第34卷, 第11期

pp.3643-3656

纸质出版 2024-11-28

DOI：10.11817/j.ysxb.1004.0609.2024-45074

中图分类号：TB333

12500

Pb-Ag阳极是锌电积中目前最常用的不溶性阳极，但其存在析氧电位高和耐腐蚀性差等问题。本文通过木质素磷酸化改性并在其表面负载纳米银颗粒，制备了磷酸化木质素/纳米银复合材料(PL/AgNPs)，采用场发射扫描电子显微镜(FESEM)、傅立叶变换红外光谱法(FTIR)、X射线光电子能谱测试(XPS)、热重分析(TGA)对PL/AgNPs的微观形貌、结构组成、银含量进行分析。采用粉末冶金和机械合金化技术制备出Pb-PL/AgNPs复合阳极，在模拟锌电积条件下，采用循环伏安法(CV)、线性扫描伏安法(LSV)、电化学阻抗谱分析法(EIS)等对Pb-PL/AgNPs复合阳极的电化学性能和耐腐蚀性能进行分析。结果表明：Pb-0.5%PL/AgNPs复合阳极具有最佳的电化学和耐腐蚀性能，其银的用量较Pb-0.75%Ag阳极减少了96.7%。Pb-0.5%PL/AgNPs复合阳极的伏安电荷量为1.0611 C/cm²，分别是纯 Pb阳极和Pb-Ag阳极的1.8倍和1.25倍；其析氧稳态电位为1.436 V，比纯Pb阳极和Pb-Ag阳极分别低194 mV和97 mV；其耐腐蚀性比纯Pb阳极和Pb-Ag阳极分别提升约86.8%和84%。

铅基阳极析氧反应磷酸化木质素纳米银颗粒

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