One-pot construction of highly oriented Co-MOF nanoneedle arrays on Co foam for high-performance supercapacitor

Chongjun Zhao; Yanzhen Ding; Zhaoqiang Zhu; Shufan Han; Chunhua Zhao; Guorong Chen

doi:10.1088/1361-6528/ac0d1b

One-pot construction of highly oriented Co-MOF nanoneedle arrays on Co foam for high-performance supercapacitor

Nanotechnology. 2021 Jul 9;32(39). doi: 10.1088/1361-6528/ac0d1b.

Authors

Chongjun Zhao¹, Yanzhen Ding¹, Zhaoqiang Zhu¹, Shufan Han¹, Chunhua Zhao¹, Guorong Chen¹

Affiliation

¹ Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China.

PMID: 34153959
DOI: 10.1088/1361-6528/ac0d1b

Abstract

Highly oriented Co-MOF nanoneedle arrays arein situconstructed on Co foam (Co-MOF@Co) by using a one-pot solvothermal strategy. As-prepared Co-MOF@Co can be directly served as a binder-free electrode for supercapacitor, which exhibits wonderful electrochemical performances, i.e. high specific capacitance (12783.0 mF cm^-2or 1164.2 F g^-1), exceptional cycling stability (90.5% retention over 10 000 cycles at 250 mA cm^-2) with a loading of 10.98 mg cm^-2. Meanwhile, an asymmetric supercapacitor of AC//Co-MOF@Co delivers a high ratability (87% retention upon ten-fold current density) and high energy density of 43.4 W h kg^-1at the power density of 145.1 W kg^-1.

Keywords: Co-MOF; highly oriented; nanoneedle arrays; solvothermal; supercapacitor.