多孔钙钛矿CaMnO₃作为可充电锂氧电池的电催化剂。

Porous perovskite CaMnO3 as an electrocatalyst for rechargeable Li-O2 batteries.

作者信息

Han Xiaopeng, Hu Yuxiang, Yang Jingang, Cheng Fangyi, Chen Jun

机构信息

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China.

出版信息

Chem Commun (Camb). 2014 Feb 11;50(12):1497-9. doi: 10.1039/c3cc48207c.

DOI:10.1039/c3cc48207c

PMID:24366540

Abstract

We report a facile synthesis method of preparing interconnected porous CaMnO3 nanostructures and their utilization as new cathode catalysts in rechargeable lithium-oxygen (Li-O2) batteries. The CaMnO3-based electrode enables much enhanced cyclability with a 620 mV smaller discharge-recharge voltage gap than that of the carbon-only cathode at a current rate of 50 mA gcarbon(-1). The improved performance is attributed to the high electrocatalytic activity of CaMnO3 with a porous nanostructure.

摘要

我们报道了一种制备相互连接的多孔CaMnO₃纳米结构的简便合成方法，以及它们作为可充电锂氧（Li-O₂）电池新型阴极催化剂的应用。基于CaMnO₃的电极在50 mA g碳⁻¹的电流速率下，与仅含碳的阴极相比，具有显著增强的循环稳定性，其充放电电压差小620 mV。性能的改善归因于具有多孔纳米结构的CaMnO₃的高电催化活性。