Biomass-Derived Activated Carbon Sheets with Tunable Oxygen Functional Groups and Pore Volume for High-Performance Oxygen Reduction and Zn-Air Batteries

Jizheng Feng; Ranxiao Tang; Xingyi Wang; Tao Meng

doi:10.1021/acsaem.1c00755

Biomass-Derived Activated Carbon Sheets with Tunable Oxygen Functional Groups and Pore Volume for High-Performance Oxygen Reduction and Zn-Air Batteries

Jizheng Feng, Ranxiao Tang, Xingyi Wang, Tao Meng

UWA School of Agriculture and Environment

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

26 Citations (Scopus)

Abstract

Biomass-derived activated carbon has attracted much attention in electrochemical energy systems, and its great potential can be further unlocked for achieving high-performance by tuning its composition and structure. Herein, we prepared activated carbon using wheat straw as the biomass feedstock. The oxygen functional groups and pore volume of the target activated carbon were successfully tuned using the mixed activator of potassium carbonate and potassium hydroxide. As a result, the activated carbon (named as AC-HC) displayed an excellent oxygen reduction reaction (ORR) behavior in terms of a small half-wave potential of 0.77 V and a large limiting current density, resulting in Zn-air batteries with a high trip efficiency of 60.7% and a long cycle life (280 h/1680 cycles).

Original language	English
Pages (from-to)	5230-5236
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	4
Issue number	5
Early online date	27 Apr 2021
DOIs	https://doi.org/10.1021/acsaem.1c00755
Publication status	Published - 24 May 2021

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title = "Biomass-Derived Activated Carbon Sheets with Tunable Oxygen Functional Groups and Pore Volume for High-Performance Oxygen Reduction and Zn-Air Batteries",

abstract = "Biomass-derived activated carbon has attracted much attention in electrochemical energy systems, and its great potential can be further unlocked for achieving high-performance by tuning its composition and structure. Herein, we prepared activated carbon using wheat straw as the biomass feedstock. The oxygen functional groups and pore volume of the target activated carbon were successfully tuned using the mixed activator of potassium carbonate and potassium hydroxide. As a result, the activated carbon (named as AC-HC) displayed an excellent oxygen reduction reaction (ORR) behavior in terms of a small half-wave potential of 0.77 V and a large limiting current density, resulting in Zn-air batteries with a high trip efficiency of 60.7% and a long cycle life (280 h/1680 cycles). ",

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T1 - Biomass-Derived Activated Carbon Sheets with Tunable Oxygen Functional Groups and Pore Volume for High-Performance Oxygen Reduction and Zn-Air Batteries

AU - Feng, Jizheng

AU - Tang, Ranxiao

AU - Wang, Xingyi

AU - Meng, Tao

PY - 2021/5/24

Y1 - 2021/5/24

N2 - Biomass-derived activated carbon has attracted much attention in electrochemical energy systems, and its great potential can be further unlocked for achieving high-performance by tuning its composition and structure. Herein, we prepared activated carbon using wheat straw as the biomass feedstock. The oxygen functional groups and pore volume of the target activated carbon were successfully tuned using the mixed activator of potassium carbonate and potassium hydroxide. As a result, the activated carbon (named as AC-HC) displayed an excellent oxygen reduction reaction (ORR) behavior in terms of a small half-wave potential of 0.77 V and a large limiting current density, resulting in Zn-air batteries with a high trip efficiency of 60.7% and a long cycle life (280 h/1680 cycles).

AB - Biomass-derived activated carbon has attracted much attention in electrochemical energy systems, and its great potential can be further unlocked for achieving high-performance by tuning its composition and structure. Herein, we prepared activated carbon using wheat straw as the biomass feedstock. The oxygen functional groups and pore volume of the target activated carbon were successfully tuned using the mixed activator of potassium carbonate and potassium hydroxide. As a result, the activated carbon (named as AC-HC) displayed an excellent oxygen reduction reaction (ORR) behavior in terms of a small half-wave potential of 0.77 V and a large limiting current density, resulting in Zn-air batteries with a high trip efficiency of 60.7% and a long cycle life (280 h/1680 cycles).

KW - activated carbon

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Biomass-Derived Activated Carbon Sheets with Tunable Oxygen Functional Groups and Pore Volume for High-Performance Oxygen Reduction and Zn-Air Batteries

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