Zuo Yuxin, Yu Ying, Shi Haoqin, Wang Jiale, Zuo Chuncheng, Dong Xiaowei
College of Fashion Design, Jiaxing Nanhu University, Jiaxing 314000, China.
College of Information Science and Engineering, Jiaxing University, Jiaxing 314000, China.
Membranes (Basel). 2022 Apr 6;12(4):407. doi: 10.3390/membranes12040407.
The hydrogen evolution reaction of the anode is a severe barrier that limits the further commercial application of Al-air batteries. Therefore, this study introduces a bifunctional membrane for the inhibition of hydrogen evolution in Al-air batteries. The reference to AlO@PAN as "bifunctional" means that it has both hydrophobic and anti-corrosion functions. AlO can effectively inhibit the migration of hydroxide ions, and PAN is an excellent hydrophobic material. The bifunctional membrane is placed between the aluminum anode and the electrolyte, which can prevent the invasion of excess water and hydroxide ions, thereby inhibiting the hydrogen evolution corrosion of the anode. Electrochemical tests have confirmed that the corrosion inhibition rate of a bifunctional membrane containing 1.82 wt. % AlO@PAN is as high as 89.24%. The specific capacity of Al-air batteries containing this membrane can reach 1950 mAh/g, and the utilization rate of the aluminum anode has reached 61.2%, which is helpful in reducing the waste of aluminum resources. The results prove that the bifunctional membrane has excellent anti-corrosion properties. Bifunctional membranes can also be used to prevent the corrosion of metals in other fields.
阳极的析氢反应是限制铝空气电池进一步商业化应用的严重障碍。因此，本研究引入了一种用于抑制铝空气电池析氢的双功能膜。将AlO@PAN称为“双功能”是指它兼具疏水和防腐功能。AlO能有效抑制氢氧根离子的迁移，而PAN是一种优异的疏水材料。该双功能膜置于铝阳极和电解质之间，可防止过量水和氢氧根离子的侵入，从而抑制阳极的析氢腐蚀。电化学测试证实，含1.82 wt.% AlO@PAN的双功能膜的缓蚀率高达89.24%。含有该膜的铝空气电池的比容量可达1950 mAh/g，铝阳极的利用率达到61.2%，这有助于减少铝资源的浪费。结果证明该双功能膜具有优异的防腐性能。双功能膜还可用于防止其他领域金属的腐蚀。
