缓蚀剂对铝空气电池放电后电解液组成与性质的影响  

Effects of corrosion inhibitors on composition and properties of electrolyte after discharging for aluminum-air batteries

作　　者：程皓 朱渊 华志凡 李铮 汪滔 陆瑶 田忠良 彭可 CHENG Hao;ZHU Yuan;HUA Zhifan;LI Zheng;WANG Tao;LU Yao;TIAN Zhongliang;PENG Ke(School of Metallurgy and Environment,Central South University,Changsha 410083,China)

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2023年第2期702-709,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(U20A20280)。

摘　　要：通过红外、拉曼光谱并结合黏度及离子电导率等物理性质分析,研究不同种类的缓蚀剂对铝-空气电池放电后电解液组成与性质的影响,并进一步研究放电后电解液性质。研究结果表明:含氧化锌和丙烯酰胺(ZnO-AM)及氧化锌和聚丙烯酰胺(ZnO-PAM)复合缓蚀剂的放电后电解液中铝含量较低,其苛性比分别为16.17和17.46。铝主要以Al(OH)_(4)^(-)形态存在于放电后的电解液中,且伴有少量的Al(OH)_(6)^(3-),此外,含有丙烯酰胺(AM)和ZnO-AM缓蚀剂的放电后电解液中还存在[(HO)_(3)AlOAl(OH)_(3)]^(2-)二聚体离子。缓蚀剂并不会改变溶液的强碱性环境,且氧化锌的加入对电解液黏度及离子电导率的影响较小;含ZnO-AM复合缓蚀剂的放电后电解液的黏度为2.51 mPa·s,电导率为1 317.28 mS/cm;而ZnO-PAM复合缓蚀剂的放电后电解液中,黏度增至5.75 mPa·s,电导率降至1 065.25 mS/cm。The effects of different types of corrosion inhibitors on the composition and properties of the electrolyte after discharging for aluminum-air battery were studied by means of infrared and Raman spectroscopy combined with the analysis of physical properties such as viscosity and ionic conductivity,and the properties of the electrolyte after discharging were further analyzed.The results show that the content of Al(Ⅲ) in the electrolyte containing ZnO-AM and ZnO-PAM composite corrosion inhibitors after discharging is lower,and the caustic ratios are 16.17 and 17.46,respectively.The aluminum mainly exists in the form of Al(OH)_(4)^(-)in the electrolyte after discharging,accompanied with a small amount of Al(OH)_(6)^(3-).In addition,there are also some[(HO)_(3)Al OAl(OH)_(3)]^(2-) dimer ions in the electrolyte containing AM and ZnO-AM corrosion inhibitors after discharging.The corrosion inhibitors does not change the strongly alkaline environment of the solution,and the addition of ZnO has little effect on the viscosity and ionic conductivity of the electrolyte.The viscosity of the electrolyte containing ZnO-AM hybrid corrosion inhibitors after discharging is 2.51 mPa·s,and the conductivity is 1 317.28 mS/cm.However,in the electrolyte of ZnO-PAM composite corrosion inhibitors after discharging,the viscosity increases to 5.75 mPa·s,and the conductivity drops to 1 065.25 mS/cm.

关 键 词：铝-空气电池 铝酸根离子 氧化锌 酰胺基团 电解液 

分 类 号：TF821[冶金工程—有色金属冶金]