基于静电纺丝技术制备的MnO纳米颗粒作为高催化活性和优异循环稳定性的Li-O₂电池阴极催化剂  

The Preparation of MnO Nanoparticles via Electrospinning as a Cathode for Li-O2 Batteries with High Catalytic Activity and Superior Cycling Stability

作　　者：李旭锋 舒清柱 高涵 夏楚轩 马凯 张勇[1] 赵红[1] 

机构地区：[1]大连交通大学交通工程学院,辽宁 大连

出　　处：《电力与能源进展》2025年第1期27-36,共10页Advances in Energy and Power Engineering

基　　金：本工作得到国家自然科学基金(22075035),辽宁省教育厅项目(LJKFZ20220204),以及大连市科学技术基金(2022JJ1CG005)的支持。

摘　　要：近年来,过渡金属氧化物已被认为是最有希望代替贵金属作为锂氧(Li-O2)电池阴极催化剂的材料。本文研究了一种由静电纺纤维煅烧后自发形成的MnO纳米颗粒作为Li-O2电池的高效催化剂。物性表征的结果显示成功合成了平均粒径为61.82 nm的MnO纳米颗粒,为立方晶系结构,作为Li-O2电池阴极在500次循环中表现出优异的循环稳定性,首次充电过电位为0.46 V,在500 mA·g−1的高电流密度下实现了1000 h的稳定循环,优于大多数已报道的用于Li-O2电池的MnOx催化剂。In recent years, transition metal oxides have been considered the most promising materials to replace precious metals as cathode catalysts for lithium-oxygen batteries. This study investigates MnO nanoparticles that spontaneously form after calcining electrospun fibers as an efficient catalyst for lithium-oxygen (Li-O2) batteries. Physical characterization shows that MnO nanoparticles with an average particle size of 61.82 nm and a cubic crystal structure were successfully synthesized. They exhibit excellent cycling stability as a cathode in Li-O2 batteries, enduring over 500 cycles with an initial overpotential of 0.46 V. Concurrent, they also achieve stable cycling for 1000 hours at a high current density of 500 mA·g−1, outperforming most reported catalysts such as MnOx for Li-O2 batteries.

关 键 词：静电纺丝 MNO 充电过电位 锂氧电池 

分 类 号：O64[理学—物理化学]