Wire-Shaped 3D-Hybrid Supercapacitors as Substitutes for Batteries

Kyeong-Nam Kang; Ananthakumar Ramadoss; Jin-Wook Min; Jong-Chul Yoon; Deokjung Lee; Seok Ju Kang; Ji-Hyun Jang

doi:10.1007/s40820-019-0356-z

Wire-Shaped 3D-Hybrid Supercapacitors as Substitutes for Batteries

Nanomicro Lett. 2020 Jan 20;12(1):28. doi: 10.1007/s40820-019-0356-z.

Authors

Kyeong-Nam Kang^#¹, Ananthakumar Ramadoss^#², Jin-Wook Min¹, Jong-Chul Yoon¹, Deokjung Lee³, Seok Ju Kang¹, Ji-Hyun Jang⁴

Affiliations

¹ School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea.
² Laboratory for Advanced Research in Polymeric Materials, Central Institute of Plastic Engineering and Technology, Bhubaneswar, 751024, India.
³ School of Mechanical, Aerospace and Nuclear Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea.
⁴ School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea. clau@unist.ac.kr.

^# Contributed equally.

Abstract

We report a wire-shaped three-dimensional (3D)-hybrid supercapacitor with high volumetric capacitance and high energy density due to an interconnected 3D-configuration of the electrode allowing for large number of electrochemical active sites, easy access of electrolyte ions, and facile charge transport for flexible wearable applications. The interconnected and compact electrode delivers a high volumetric capacitance (gravimetric capacitance) of 73 F cm^-3 (2446 F g^-1), excellent rate capability, and cycle stability. The 3D-nickel cobalt-layered double hydroxide onto 3D-nickel wire (NiCo LDH/3D-Ni)//the 3D-manganese oxide onto 3D-nickel wire (Mn₃O₄/3D-Ni) hybrid supercapacitor exhibits energy density of 153.3 Wh kg^-1 and power density of 8810 W kg^-1. The red light-emitting diode powered by the as-prepared hybrid supercapacitor can operate for 80 min after being charged for tens of seconds and exhibit excellent electrochemical stability under various deformation conditions. The results verify that such wire-shaped 3D-hybrid supercapacitors are promising alternatives for batteries with long charge-discharge times, for smart wearable and implantable devices.

Keywords: Fast charging energy storage system; Flexible hybrid supercapacitor; High energy density device; Three-dimensional (3D) metal current collector; Wire-shaped supercapacitor.