Journal
JOURNAL OF POWER SOURCES
Volume 342, Issue -, Pages 629-637Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.12.057
Keywords
Supercapacitor; MnCo2S4; Core-shell nanostructure; Electrochemical behavior
Funding
- Priority Research Centers Program [2009-0093823]
- Korean Government (MSIP) through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology (MEST) [2009-0093823, 2015R1A5A1037668]
- National Research Foundation of Korea [2009-0093823, 2015R1A5A1037668] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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High electrical conductivity and rational design of structures are two crucial routes to improving the electrochemical performance of electrode materials. However, highly conductive electrode materials with short ion-transport paths remain a challenge in energy storage. Here, we propose manganese cobalt sulfide (MnCo2S4) nanowire wrapping by a flocculent shell layer using a facile hydrothermal method with post-sulfurization treatment. The resultant MnCo2S4 electrode employed for supercapacitor delivered a remarkable specific capacitance of 2067 F g(-1) at the current density of 1 A g(-1), good rate capability, and excellent cycling stability. Moreover, an asymmetric supercapacitor device was successfully assembled using MnCo2S4 and reduced graphene oxide (rGO) as electrodes, achieving a high energy density of 31.3 W kri at a power density of 800 W kg(-1). With such outstanding electrochemical performance, this asymmetric supercapacitor device holds great potential in developing high-energy storage applications. (C) 2016 Elsevier B.V. All rights reserved.
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