摘要
镁空气电池在反应过程中生成的氢氧化镁易沉积在空气阴极表面影响电池性能,为改善此现象,通过对电解液不循环、电解液持续循环、电解液间歇循环三种工况下的恒压测试,并结合反应后的空气阴极表面微观形貌和能谱分析,表征三种工况对改善氢氧化镁沉积现象的影响。结果表明:电解液间歇循环工况可使恒压放电电流/输出功率维持在2.4 A/1.5 W以上,反应后的空气阴极微观形貌下观测到的氢氧化镁也相对其他两种工况较少。因此电解液间歇循环工况可以有效改善氢氧化镁在空气阴极表面沉积现象,使镁空气电池长时间以较大功率输出。
Magnesium hydroxide was formed during the reaction process of magnesium air battery,and it deposited on the air cathode surface can affect the battery performance.To improve this phenomenon,this study analyzed and characterized the effect of three kinds of working condition on deposition of magnesium hydroxide through the constant voltage test,microstructure and area scan among no flowing condition of electrolyte,continuous circulating condition of electrolyte and intermittent circulating condition of electrolyte.The results indicate that intermittent circulating condition of electrolyte can maintain constant voltage discharge current/output power over 2.4 A/1.5 W.Compared with the other two working conditions,less hydroxide was observed in the microscopic morphology of the air cathode after this reaction.Therefore,intermittent circulating condition of electrolyte can effectively improve the deposition of magnesium hydroxide on the cathode surface and enable the magnesium air battery to output at higher power for a long time.
作者
张博文
袁比飞
杨哲
屈文涛
ZHANG Bo-wen;YUAN Bi-fei;YANG Zhe;QU Wen-tao(School of Mechanical Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065,China)
出处
《电源技术》
CAS
北大核心
2020年第12期1763-1765,1842,共4页
Chinese Journal of Power Sources
关键词
镁空气电池
放电产物沉积
循环工况
恒压放电
阴极形貌
magnesium air batteries
deposition of discharge product
circulating condition
constant voltage discharge
microscopic morphology
作者简介
张博文(1995-),男,河北省人,硕士研究生,主要研究方向为镁空气电池;通信作者:屈文涛教授。
