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Title: A Mo 2 C/Carbon Nanotube Composite Cathode for Lithium–Oxygen Batteries with High Energy Efficiency and Long Cycle Life

Abstract

Although lithium-oxygen batteries are attracting considerable attention because of potential for extremely high energy density, their practical use has been restricted due to a low energy efficiency and poor cycle life compared to lithium-ion batteries. Here we present a nanostructured cathode based on molybdenum carbide nanoparticles (Mo2C) dispersed on carbon nanotubes (CNT), which dramatically increase the electrical efficiency up to 88 % with a cycle life of more than 100 cycles. We found that the Mo2C nanoparticle catalysts contribute to the formation of a well-dispersed lithium peroxide nanolayers (Li2O2) on the Mo2C/CNTs with large contact area during oxygen reduction reaction (ORR). This Li2O2 structure can be decomposed at low potential upon oxygen evolution reaction (OER) by avoiding the energy loss associated with the decomposition of the typical Li2O2 discharge products.

Authors:
 [1]; ;  [1]; ; ;  [1]
  1. Department of Energy Engineering, Hanyang University, Seoul, 133-791, Republic of Korea
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1392114
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Nano; Journal Volume: 9; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
Carbon nanotube; Lithium oxygen batteries; Molybdenum carbide nanoparticles; Nanostructures; Oxygen evolution reaction

Citation Formats

Kwak, Won-Jin, Lau, Kah Chun, Shin, Chang-Dae, Amine, Khalil, Curtiss, Larry A., and Sun, Yang-Kook. A Mo 2 C/Carbon Nanotube Composite Cathode for Lithium–Oxygen Batteries with High Energy Efficiency and Long Cycle Life. United States: N. p., 2015. Web. doi:10.1021/acsnano.5b00267.
Kwak, Won-Jin, Lau, Kah Chun, Shin, Chang-Dae, Amine, Khalil, Curtiss, Larry A., & Sun, Yang-Kook. A Mo 2 C/Carbon Nanotube Composite Cathode for Lithium–Oxygen Batteries with High Energy Efficiency and Long Cycle Life. United States. doi:10.1021/acsnano.5b00267.
Kwak, Won-Jin, Lau, Kah Chun, Shin, Chang-Dae, Amine, Khalil, Curtiss, Larry A., and Sun, Yang-Kook. Wed . "A Mo 2 C/Carbon Nanotube Composite Cathode for Lithium–Oxygen Batteries with High Energy Efficiency and Long Cycle Life". United States. doi:10.1021/acsnano.5b00267.
@article{osti_1392114,
title = {A Mo 2 C/Carbon Nanotube Composite Cathode for Lithium–Oxygen Batteries with High Energy Efficiency and Long Cycle Life},
author = {Kwak, Won-Jin and Lau, Kah Chun and Shin, Chang-Dae and Amine, Khalil and Curtiss, Larry A. and Sun, Yang-Kook},
abstractNote = {Although lithium-oxygen batteries are attracting considerable attention because of potential for extremely high energy density, their practical use has been restricted due to a low energy efficiency and poor cycle life compared to lithium-ion batteries. Here we present a nanostructured cathode based on molybdenum carbide nanoparticles (Mo2C) dispersed on carbon nanotubes (CNT), which dramatically increase the electrical efficiency up to 88 % with a cycle life of more than 100 cycles. We found that the Mo2C nanoparticle catalysts contribute to the formation of a well-dispersed lithium peroxide nanolayers (Li2O2) on the Mo2C/CNTs with large contact area during oxygen reduction reaction (ORR). This Li2O2 structure can be decomposed at low potential upon oxygen evolution reaction (OER) by avoiding the energy loss associated with the decomposition of the typical Li2O2 discharge products.},
doi = {10.1021/acsnano.5b00267},
journal = {ACS Nano},
number = 4,
volume = 9,
place = {United States},
year = {Wed Feb 18 00:00:00 EST 2015},
month = {Wed Feb 18 00:00:00 EST 2015}
}