炭载Cu掺杂Mn3O4的氧还原催化活性与锌空气电池性能强化研究

Study on oxygen reduction catalytic activity of carbon-loaded Cu-doped Mn3O4 and performance enhancement in zinc-air batteries

张钧凯 ¹诸葛祥群 ¹刘通 ¹罗鲲¹

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作者信息

1. 常州大学材料科学与工程学院,江苏常州 213164
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摘要

通过沉积-焙烧方法合成了一种在炭黑上Cu掺杂Mn3O4的氧还原反应(ORR)功能催化剂MCO/C.通过优化Mn与Cu的摩尔比合成得到Mn和Cu元素混合价态的MCO/C-51.在ORR过程中,MCO/C-51在Cu2O/C、Mn3O4/C、MCO/C-31和MCO/C-71中表现出最佳的ORR催化活性,其Tafel斜率为73.6 mV/dec,电子转移数约为4.2,具有优异的循环稳定性.在锌-空气电池(ZABs)的阴极使用MCO/C-51催化剂,ZABs的循环寿命在5 mA/cm2时超过128 h,其充放电容量也大幅提升,ZABs的比容量和功率密度分别达到691 mAh/(g Zn)和80 mW/cm2.

Abstract

Cu-doped Mn3O4 on carbon black(MCO/C),a functional oxygen reduction reaction(ORR)catalyst,is synthesized via a deposition-calcination method.Through optimizing the molar ratio of Mn to Cu,a mixed-valence MCO/C-51 material is obtained.Among Cu2O/C,Mn3O4/C,MCO/C-31,MCO/C-51,and MCO/C-71,MCO/C-51 exhibits the best ORR catalytic activity with a Tafel slope of 73.6 mV·dec-1 and an electron transfer number of approximately 4.2,along with excellent cycling stability.As MCO/C-51 catalyst is used as a cathode catalyst in zinc-air batteries(ZABs),MCO/C-51 enables ZABs to achieve a cycle life exceeding 128 hours at 5 mA·cm-2,with a significantly enhanced charge-discharge capacity.The specific capacity and power density of the ZABs reach 691 mAh(g Zn)-1 and 80 mW·cm-2,respectively.

关键词

Cu掺杂/Mn3O4/炭黑/氧还原催化剂/锌空气电池

Key words

Cu doping/Mn3O4/carbon black/oxygen reduction catalyst/zinc-air batteries

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基金项目

国家自然科学基金项目(51874051)

国家自然科学基金项目(52111530139)

出版年

2024

现代化工

中国化工信息中心

现代化工

CSTPCDCSCD北大核心

影响因子：0.553

ISSN：0253-4320

参考文献量28

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