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Nano Research 2022, 15(10): 9047-9056 https://doi.org/10.1007/s12274-022-4902-5
Research Article | Issue | Published: 20 August 2022

Holey graphene oxide-templated construction of nano nickel-based metal–organic framework for highly efficient asymmetric supercapacitor

Show Author's Information Hang Wang1( ),  Pengfei Zhao1,  Xingmao Zhang1,  Su Zhang1,  Xiaolong Lu1,  Zhipeng Qiu1,  Kang Ren1,  Zheng Xu1,  Ruxin Yao2,  Tong Wei1( ),  Zhuangjun Fan1( )
State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China
Key Laboratory of Magnetic Molecules & Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry & Material Science, Shanxi Normal University, Taiyuan 030006, China
Keywords:
supercapacitor, holey graphene oxide, templated construction, nano MOFs
Topics:
CapacitanceGrapheneSupercapacitor
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Wang H, Zhao P, Zhang X, et al. Holey graphene oxide-templated construction of nano nickel-based metal–organic framework for highly efficient asymmetric supercapacitor. Nano Research, 2022, 15(10): 9047-9056. https://doi.org/10.1007/s12274-022-4902-5
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Abstract Full text Electronic supplementary material About this article

Metal–organic frameworks (MOFs) with redox-active metal sites and controllable crystalline structures make it possible to access the merits of highly-efficient electrode materials in electrochemical energy storage systems. However, most MOFs suffer from low capacitance and poor cycling stability that largely thwart their application. Herein, we present the holey graphene oxide (HGO) template strategy to prepare nano two-dimensional Ni(BDC) with HGO as both template and capping agent (denoted as Ni(BDC)-HGOx, x = 10, 20, 30, and 40 according to the added HGO amount). Structural analyses reveal that HGO can significantly inhibit the Ni(BDC) agglomeration, thus offering a high ion-accessible surface area. Ni(BDC)-HGO30 with well-exposed active sites exhibits a high capacitance of 1,115.6 F·g−1 at 1 A·g−1 in 6 M KOH aqueous, 1.8 times that of bulk Ni(BDC). An asymmetric supercapacitor with Ni(BDC)-HGO30 as a positive electrode and activated carbon as the opposing electrode delivers an energy density of 52.5 W·h·kg−1 and a power density up to 18.0 kW·kg−1, with 92.5% capacitance retention after 10,000 cycles. Galvanostatic intermittent titration technique and in situ electrochemical–Raman measurements were exploited to elucidate the electrochemical behavior of Ni(BDC)-HGO30. These results pave the way for the development of rationally tuned MOF materials for enhancing supercapacitor performances.


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About this article

Holey graphene oxide-templated construction of nano nickel-based metal–organic framework for highly efficient asymmetric supercapacitor

Show Author's information Hang Wang1( ), Pengfei Zhao1, Xingmao Zhang1, Su Zhang1, Xiaolong Lu1, Zhipeng Qiu1, Kang Ren1, Zheng Xu1, Ruxin Yao2, Tong Wei1( ), Zhuangjun Fan1( )
State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China
Key Laboratory of Magnetic Molecules & Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry & Material Science, Shanxi Normal University, Taiyuan 030006, China

Abstract

Metal–organic frameworks (MOFs) with redox-active metal sites and controllable crystalline structures make it possible to access the merits of highly-efficient electrode materials in electrochemical energy storage systems. However, most MOFs suffer from low capacitance and poor cycling stability that largely thwart their application. Herein, we present the holey graphene oxide (HGO) template strategy to prepare nano two-dimensional Ni(BDC) with HGO as both template and capping agent (denoted as Ni(BDC)-HGOx, x = 10, 20, 30, and 40 according to the added HGO amount). Structural analyses reveal that HGO can significantly inhibit the Ni(BDC) agglomeration, thus offering a high ion-accessible surface area. Ni(BDC)-HGO30 with well-exposed active sites exhibits a high capacitance of 1,115.6 F·g−1 at 1 A·g−1 in 6 M KOH aqueous, 1.8 times that of bulk Ni(BDC). An asymmetric supercapacitor with Ni(BDC)-HGO30 as a positive electrode and activated carbon as the opposing electrode delivers an energy density of 52.5 W·h·kg−1 and a power density up to 18.0 kW·kg−1, with 92.5% capacitance retention after 10,000 cycles. Galvanostatic intermittent titration technique and in situ electrochemical–Raman measurements were exploited to elucidate the electrochemical behavior of Ni(BDC)-HGO30. These results pave the way for the development of rationally tuned MOF materials for enhancing supercapacitor performances.

Keywords: supercapacitor, holey graphene oxide, templated construction, nano MOFs

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Publication history
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Acknowledgements

Publication history

Received: 07 July 2022
Revised: 28 July 2022
Accepted: 14 August 2022
Published: 20 August 2022
Issue date: October 2022

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© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This research was supported by the National Natural Science Foundation of China (Nos. 22105226 and 51972342), the Shandong Province Postdoctoral Innovative Talent Support Program (No. SDBX20200004), the China Postdoctoral Science Foundation (No. 2020M682253), the Qingdao Postdoctoral Funding Project (No. ZX20210067), the Independent innovation scientific research project (No. 20CX06100A), and the Taishan Scholar Project of Shandong Province (No. ts20190922).

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