Bioinspired Synthesis of Hierarchically Porous MoO2/Mo2C Nanocrystal Decorated N-Doped Carbon Foam for Lithium-Oxygen Batteries

Yan Lu; Huixiang Ang; Qingyu Yan; Eileen Fong

doi:10.1021/acs.chemmater.6b01966

Bioinspired Synthesis of Hierarchically Porous MoO₂/Mo₂C Nanocrystal Decorated N-Doped Carbon Foam for Lithium-Oxygen Batteries

Yan Lu, Huixiang Ang, Qingyu Yan^*, Eileen Fong

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

106 Citations (Scopus)

Abstract

The lithium oxygen (Li-O₂) battery is one of the most promising technologies among various electrochemical energy storage systems. The challenge to develop a high-performance Li-O₂ battery lies in exploring an air electrode with optimal porous structure and high efficient bifunctional electrocatalyst. The present work demonstrates a bioinspired synthesis route for the preparation of high performance Li-O₂ air electrode materials that are made out of N-doped carbon foams decorated with heteronanostructured MoO₂/Mo₂C nanocrystals (MoO₂/Mo₂C@3D NCF). Here, recombinant proteins (ELK16-FLAG) facilitated the self-assembly of metal precursors and provided a carbon source for Mo₂C formation. The as-prepared MoO₂/Mo₂C@3D NCF showed superior electrocatalytic activity in both oxygen evolution reaction and oxygen reduction reaction mechanisms with a high round-trip efficiency of 89.1% (2.77 V/3.11 V) at 100 mA g^-1 as well as exceptional rate performances and good cyclability in Li-O₂ battery. The desirable electrochemical performance can be attributed to the unique hierarchical porous structure of the 3D carbon foam and the intimate contact between MoO₂ and Mo₂C nanocrystals. We demonstrate that the novel, facile, environmentally friendly bioinspired approaches would open new avenues for the synthesis of 3D nitrogen doped carbon supported advanced functional materials with excellent electrochemical performances.

Original language	English
Pages (from-to)	5743-5752
Number of pages	10
Journal	Chemistry of Materials
Volume	28
Issue number	16
DOIs	https://doi.org/10.1021/acs.chemmater.6b01966
Publication status	Published - Aug 23 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering
Materials Chemistry

Access to Document

10.1021/acs.chemmater.6b01966

Cite this

@article{7c67a53ec231458e82d5c8629c17303b,

title = "Bioinspired Synthesis of Hierarchically Porous MoO2/Mo2C Nanocrystal Decorated N-Doped Carbon Foam for Lithium-Oxygen Batteries",

abstract = "The lithium oxygen (Li-O2) battery is one of the most promising technologies among various electrochemical energy storage systems. The challenge to develop a high-performance Li-O2 battery lies in exploring an air electrode with optimal porous structure and high efficient bifunctional electrocatalyst. The present work demonstrates a bioinspired synthesis route for the preparation of high performance Li-O2 air electrode materials that are made out of N-doped carbon foams decorated with heteronanostructured MoO2/Mo2C nanocrystals (MoO2/Mo2C@3D NCF). Here, recombinant proteins (ELK16-FLAG) facilitated the self-assembly of metal precursors and provided a carbon source for Mo2C formation. The as-prepared MoO2/Mo2C@3D NCF showed superior electrocatalytic activity in both oxygen evolution reaction and oxygen reduction reaction mechanisms with a high round-trip efficiency of 89.1\% (2.77 V/3.11 V) at 100 mA g-1 as well as exceptional rate performances and good cyclability in Li-O2 battery. The desirable electrochemical performance can be attributed to the unique hierarchical porous structure of the 3D carbon foam and the intimate contact between MoO2 and Mo2C nanocrystals. We demonstrate that the novel, facile, environmentally friendly bioinspired approaches would open new avenues for the synthesis of 3D nitrogen doped carbon supported advanced functional materials with excellent electrochemical performances.",

author = "Yan Lu and Huixiang Ang and Qingyu Yan and Eileen Fong",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = aug,

day = "23",

doi = "10.1021/acs.chemmater.6b01966",

language = "English",

volume = "28",

pages = "5743--5752",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "16",

}

TY - JOUR

T1 - Bioinspired Synthesis of Hierarchically Porous MoO2/Mo2C Nanocrystal Decorated N-Doped Carbon Foam for Lithium-Oxygen Batteries

AU - Lu, Yan

AU - Ang, Huixiang

AU - Yan, Qingyu

AU - Fong, Eileen

PY - 2016/8/23

Y1 - 2016/8/23

N2 - The lithium oxygen (Li-O2) battery is one of the most promising technologies among various electrochemical energy storage systems. The challenge to develop a high-performance Li-O2 battery lies in exploring an air electrode with optimal porous structure and high efficient bifunctional electrocatalyst. The present work demonstrates a bioinspired synthesis route for the preparation of high performance Li-O2 air electrode materials that are made out of N-doped carbon foams decorated with heteronanostructured MoO2/Mo2C nanocrystals (MoO2/Mo2C@3D NCF). Here, recombinant proteins (ELK16-FLAG) facilitated the self-assembly of metal precursors and provided a carbon source for Mo2C formation. The as-prepared MoO2/Mo2C@3D NCF showed superior electrocatalytic activity in both oxygen evolution reaction and oxygen reduction reaction mechanisms with a high round-trip efficiency of 89.1% (2.77 V/3.11 V) at 100 mA g-1 as well as exceptional rate performances and good cyclability in Li-O2 battery. The desirable electrochemical performance can be attributed to the unique hierarchical porous structure of the 3D carbon foam and the intimate contact between MoO2 and Mo2C nanocrystals. We demonstrate that the novel, facile, environmentally friendly bioinspired approaches would open new avenues for the synthesis of 3D nitrogen doped carbon supported advanced functional materials with excellent electrochemical performances.

AB - The lithium oxygen (Li-O2) battery is one of the most promising technologies among various electrochemical energy storage systems. The challenge to develop a high-performance Li-O2 battery lies in exploring an air electrode with optimal porous structure and high efficient bifunctional electrocatalyst. The present work demonstrates a bioinspired synthesis route for the preparation of high performance Li-O2 air electrode materials that are made out of N-doped carbon foams decorated with heteronanostructured MoO2/Mo2C nanocrystals (MoO2/Mo2C@3D NCF). Here, recombinant proteins (ELK16-FLAG) facilitated the self-assembly of metal precursors and provided a carbon source for Mo2C formation. The as-prepared MoO2/Mo2C@3D NCF showed superior electrocatalytic activity in both oxygen evolution reaction and oxygen reduction reaction mechanisms with a high round-trip efficiency of 89.1% (2.77 V/3.11 V) at 100 mA g-1 as well as exceptional rate performances and good cyclability in Li-O2 battery. The desirable electrochemical performance can be attributed to the unique hierarchical porous structure of the 3D carbon foam and the intimate contact between MoO2 and Mo2C nanocrystals. We demonstrate that the novel, facile, environmentally friendly bioinspired approaches would open new avenues for the synthesis of 3D nitrogen doped carbon supported advanced functional materials with excellent electrochemical performances.

UR - http://www.scopus.com/inward/record.url?scp=84983670693&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84983670693&partnerID=8YFLogxK

U2 - 10.1021/acs.chemmater.6b01966

DO - 10.1021/acs.chemmater.6b01966

M3 - Article

AN - SCOPUS:84983670693

SN - 0897-4756

VL - 28

SP - 5743

EP - 5752

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 16

ER -