Cathode Based on Molybdenum Disulfide Nanoflakes for Lithium-Oxygen Batteries

ACS Nano
Mohammad AsadiAmin Salehi-Khojin

Abstract

Lithium-oxygen (Li-O2) batteries have been recognized as an emerging technology for energy storage systems owing to their high theoretical specific energy. One challenge is to find an electrolyte/cathode system that is efficient, stable, and cost-effective. We present such a system based on molybdenum disulfide (MoS2) nanoflakes combined with an ionic liquid (IL) that work together as an effective cocatalyst for discharge and charge in a Li-O2 battery. Cyclic voltammetry results show superior catalytic performance for this cocatalyst for both oxygen reduction and evolution reactions compared to Au and Pt catalysts. It also performs remarkably well in the Li-O2 battery system with 85% round-trip efficiency and reversibility up to 50 cycles. Density functional calculations provide a mechanistic understanding of the MoS2 nanoflakes/IL system. The cocatalyst reported in this work could open the way for exploiting the unique properties of ionic liquids in Li-air batteries in combination with nanostructured MoS2 as a cathode material.

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Citations

Oct 27, 2016·Chemistry : a European Journal·Naziah Mohamad LatiffMartin Pumera
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Feb 3, 2018·Chemical Society Reviews·Qiwei YangSheng Dai
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Dec 1, 2018·Advanced Materials·Leily MajidiAmin Salehi-Khojin
Aug 24, 2019·Advanced Materials·Alireza AhmadiparidariAmin Salehi-Khojin
Nov 30, 2019·Materials·Alain MaugerKarim Zaghib
Oct 1, 2020·Chemical Society Reviews·Andebet Gedamu TamiratYongyao Xia
Mar 23, 2018·Nature·Mohammad AsadiAmin Salehi-Khojin
Mar 1, 2018·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Morasae SamadiAlireza Z Moshfegh
Jan 23, 2021·ACS Applied Materials & Interfaces·Sina RastegarAmin Salehi-Khojin
Jan 29, 2021·ACS Applied Materials & Interfaces·Chih-Jung ChenRu-Shi Liu
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Feb 23, 2020·ACS Nano·Ramin Rojaee, Reza Shahbazian-Yassar
Sep 17, 2021·Small·Ahmad JaradatAmin Salehi-Khojin

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