Bifunctional N-CoSe2/3D-MXene as Highly Efficient and Durable Cathode for Rechargeable Zn-Air Battery

Zhiping Zeng; Gengtao Fu; Hong Bin Yang; Yibo Yan; Jie Chen; Zhongzheng Yu; Jiajian Gao; Li Yong Gan; Bin Liu; Peng Chen

doi:10.1021/acsmaterialslett.9b00337

Bifunctional N-CoSe₂/3D-MXene as Highly Efficient and Durable Cathode for Rechargeable Zn-Air Battery

Zhiping Zeng, Gengtao Fu, Hong Bin Yang, Yibo Yan, Jie Chen, Zhongzheng Yu, Jiajian Gao, Li Yong Gan, Bin Liu, Peng Chen^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

106 Citations (Scopus)

Abstract

Rechargeable Zn-air battery is a promising alternative to the widely used lithium-ion battery. Its practical use, however, is hindered by low power density, unsatisfactory energy efficiency, poor durability, and unstable voltage output. Here, we demonstrate a bifunctional catalyst for oxygen evolution and oxygen reduction reactions based on 3D MXene coupled with nitrogen-doped cobalt selenide nanocrystals (N-CoSe₂/3D Ti₃C₂T_x). Combining experimental characterizations and density functional theory (DFT), the excellent performance is ascribed to enhanced intrinsic activity of CoSe₂ due to electron transfer from MXene, N doping which lowers the reaction energy barriers, and 3D MXene architecture which provides large specific surface area, high porosity, and good conductivity. Moreover, Zn-air battery equipped with the developed N-CoSe₂/3D MXene as the air cathode exhibits better power/energy densities and long-lasting cycling life (over 500 cycles) compared with that of mixed Pt/C and RuO₂. Copyright © 2019 American Chemical Society.

Original language	English
Pages (from-to)	432-439
Journal	ACS Materials Letters
Volume	1
Issue number	4
Online published	3 Sept 2019
DOIs	https://doi.org/10.1021/acsmaterialslett.9b00337
Publication status	Published - 7 Oct 2019
Externally published	Yes

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title = "Bifunctional N-CoSe2/3D-MXene as Highly Efficient and Durable Cathode for Rechargeable Zn-Air Battery",

abstract = "Rechargeable Zn-air battery is a promising alternative to the widely used lithium-ion battery. Its practical use, however, is hindered by low power density, unsatisfactory energy efficiency, poor durability, and unstable voltage output. Here, we demonstrate a bifunctional catalyst for oxygen evolution and oxygen reduction reactions based on 3D MXene coupled with nitrogen-doped cobalt selenide nanocrystals (N-CoSe2/3D Ti3C2Tx). Combining experimental characterizations and density functional theory (DFT), the excellent performance is ascribed to enhanced intrinsic activity of CoSe2 due to electron transfer from MXene, N doping which lowers the reaction energy barriers, and 3D MXene architecture which provides large specific surface area, high porosity, and good conductivity. Moreover, Zn-air battery equipped with the developed N-CoSe2/3D MXene as the air cathode exhibits better power/energy densities and long-lasting cycling life (over 500 cycles) compared with that of mixed Pt/C and RuO2. Copyright {\textcopyright} 2019 American Chemical Society.",

author = "Zhiping Zeng and Gengtao Fu and Yang, {Hong Bin} and Yibo Yan and Jie Chen and Zhongzheng Yu and Jiajian Gao and Gan, {Li Yong} and Bin Liu and Peng Chen",

year = "2019",

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doi = "10.1021/acsmaterialslett.9b00337",

language = "English",

volume = "1",

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TY - JOUR

T1 - Bifunctional N-CoSe2/3D-MXene as Highly Efficient and Durable Cathode for Rechargeable Zn-Air Battery

AU - Zeng, Zhiping

AU - Fu, Gengtao

AU - Yang, Hong Bin

AU - Yan, Yibo

AU - Chen, Jie

AU - Yu, Zhongzheng

AU - Gao, Jiajian

AU - Gan, Li Yong

AU - Liu, Bin

AU - Chen, Peng

PY - 2019/10/7

Y1 - 2019/10/7

N2 - Rechargeable Zn-air battery is a promising alternative to the widely used lithium-ion battery. Its practical use, however, is hindered by low power density, unsatisfactory energy efficiency, poor durability, and unstable voltage output. Here, we demonstrate a bifunctional catalyst for oxygen evolution and oxygen reduction reactions based on 3D MXene coupled with nitrogen-doped cobalt selenide nanocrystals (N-CoSe2/3D Ti3C2Tx). Combining experimental characterizations and density functional theory (DFT), the excellent performance is ascribed to enhanced intrinsic activity of CoSe2 due to electron transfer from MXene, N doping which lowers the reaction energy barriers, and 3D MXene architecture which provides large specific surface area, high porosity, and good conductivity. Moreover, Zn-air battery equipped with the developed N-CoSe2/3D MXene as the air cathode exhibits better power/energy densities and long-lasting cycling life (over 500 cycles) compared with that of mixed Pt/C and RuO2. Copyright © 2019 American Chemical Society.

AB - Rechargeable Zn-air battery is a promising alternative to the widely used lithium-ion battery. Its practical use, however, is hindered by low power density, unsatisfactory energy efficiency, poor durability, and unstable voltage output. Here, we demonstrate a bifunctional catalyst for oxygen evolution and oxygen reduction reactions based on 3D MXene coupled with nitrogen-doped cobalt selenide nanocrystals (N-CoSe2/3D Ti3C2Tx). Combining experimental characterizations and density functional theory (DFT), the excellent performance is ascribed to enhanced intrinsic activity of CoSe2 due to electron transfer from MXene, N doping which lowers the reaction energy barriers, and 3D MXene architecture which provides large specific surface area, high porosity, and good conductivity. Moreover, Zn-air battery equipped with the developed N-CoSe2/3D MXene as the air cathode exhibits better power/energy densities and long-lasting cycling life (over 500 cycles) compared with that of mixed Pt/C and RuO2. Copyright © 2019 American Chemical Society.

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U2 - 10.1021/acsmaterialslett.9b00337

DO - 10.1021/acsmaterialslett.9b00337

M3 - RGC 21 - Publication in refereed journal

SN - 2639-4979

VL - 1

SP - 432

EP - 439

JO - ACS Materials Letters

JF - ACS Materials Letters

IS - 4

ER -