19
IRUS Total
Downloads
  Altmetric

S, N-Co-doped graphene-nickel cobalt sulfide aerogel: Improved energy storage and electrocatalytic performance

Title: S, N-Co-doped graphene-nickel cobalt sulfide aerogel: Improved energy storage and electrocatalytic performance
Authors: He, G
Qiao, M
Li, W
Lu, Y
Zhao, T
Zou, R
Li, B
Darr, JA
Hu, J
Titirici, M-M
Parkin, IP
Item Type: Journal Article
Abstract: Metal sulfides are commonly used in energy storage and electrocatalysts due to their redox centers and active sites. Most literature reports show that their performance decreases significantly caused by oxidation in alkaline electrolyte during electrochemical testing. Herein, S and N co‐doped graphene‐based nickel cobalt sulfide aerogels are synthesized for use as rechargeable alkaline battery electrodes and oxygen reduction reaction (ORR) catalysts. Notably, this system shows improved cyclability due to the stabilization effect of the S and N co‐doped graphene aerogel (SNGA). This reduces the rate of oxidation and the decay of electronic conductivity of the metal sulfides materials in alkaline electrolyte, i.e., the capacity decrease of CoNi2S4/SNGA is 4.2% for 10 000 cycles in a three‐electrode test; the current retention of 88.6% for CoS/SNGA after 12 000 s current–time chronoamperometric response in the ORR test is higher than corresponding CoS nanoparticles and CoS/non‐doped graphene aerogels. Importantly, the results here confirm that the NiCoS ternary materials behave as an electrode for rechargeable alkaline batteries rather than supercapacitors electrodes in three‐electrode test as commonly described and accepted in the literature. Furthermore, formulas to evaluate the performance of hybrid battery devices are specified.
Issue Date: 1-Jan-2017
Date of Acceptance: 20-Jul-2016
URI: http://hdl.handle.net/10044/1/65426
DOI: https://dx.doi.org/10.1002/advs.201600214
ISSN: 2198-3844
Publisher: Wiley Open Access
Journal / Book Title: Advanced Science
Volume: 4
Issue: 1
Copyright Statement: © 2016 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
FLEXIBLE ASYMMETRIC SUPERCAPACITORS
OXYGEN REDUCTION REACTION
SOLID-STATE SUPERCAPACITORS
LITHIUM-ION BATTERIES
ONE-POT SYNTHESIS
BIFUNCTIONAL ELECTROCATALYST
PSEUDOCAPACITIVE PROPERTIES
NANOSHEET ARRAYS
SHELL NANOWIRES
CARBON
aerogel
nickel cobalt sulfide
oxygen reduction reaction
rechargeable alkaline battery
Publication Status: Published
Article Number: 1600214
Online Publication Date: 2016-08-17
Appears in Collections:Chemical Engineering
Faculty of Engineering