摘要
金属-空气电池(MABs)具有成本低、环境友好、比功率和比能量高等优点,而其中的铁-空气电池(IAB)更具有资源丰富以及高比能量等特点,但IAB在充放电过程中存在的铁电极钝化、腐蚀、自放电、析氢反应以及体积变化等问题制约着其发展。考虑到在铁负极制备过程中通常使用乙炔黑作为导电与支撑活性物质的作用,为了考察其他碳材料对铁电极电化学性能的影响,分别利用乙炔黑、石墨粉和碳纳米管制备了不同的铁电极,并与Pt/C空气电极组装成相应的铁-空气电池,对这些电池进行了不同电流密度下的充放电研究并测试了放电极化曲线。结果表明,碳纳米管修饰铁负极的电池整体性能优异,表现出较高的循环稳定性、较高的充放电电压效率以及功率密度。
Metal-air batteries(MABs)have the advantages of low cost,environmental friendliness,high specific power and specific energy,among which iron-air batteries(IAB)are more resource-rich and have high specific energy.Problems in IAB such as passivation,corrosion,self-discharge,hydrogen evolution reaction and volume change of iron electrodes restrict its development.Considering that acetylene black is commonly used as a conductive and supportive active material in the preparation of iron negative electrodes,to further investigate the impact of other carbon materials on the electrochemical performance of iron electrodes,we prepared different iron electrodes using acetylene black,graphite powder,and carbon nanotube.Corresponding iron-air batteries were assembled with the prepared iron electrodes and Pt/C air electrode.Charge/discharge curves at different current densities and discharge polarization curves were obtained on these batteries.The results indicate that the overall performance of the carbon nanotube modified iron negative electrode battery is excellent,exhibiting high cycle stability,high charge discharge voltage efficiency,and power density.This work provides reference value for the indepth study of IAB by preparing stable and reliable iron electrodes.
作者
尹玉华
方灿
易清风
李广
YIN Yuhua;FANG Can;YI Qingfeng;LI Guang(School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China)
出处
《化工学报》
EI
CSCD
北大核心
2024年第2期685-694,共10页
CIESC Journal
基金
国家自然科学基金项目(22379042)。
关键词
电化学
纳米材料
再生能源
铁-空气电池
electrochemistry
nanomaterials
renewable energy
iron-air batteries