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Synthesis and Low‐Temperature Capacitive Performances of Ternary Active Site CoNiFe Hydroxides
Author(s) -
Su Linghao,
Song Zuwei,
Guo Jialiang,
Li Jiujiang
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700071
Subject(s) - ternary operation , materials science , crystallinity , molar ratio , cyclic voltammetry , impurity , hydroxide , layered double hydroxides , hydrothermal circulation , ternary compound , molar , analytical chemistry (journal) , nuclear chemistry , chemical engineering , inorganic chemistry , electrode , catalysis , electrochemistry , chemistry , composite material , chromatography , organic chemistry , computer science , engineering , programming language , medicine , dentistry
CoNiFe ternary hydroxides were synthesized via hydrothermal method and the synthesis conditions (temperature, reaction time and Co/Ni/Fe molar ratio) were investigated. High temperature and long reaction time help to increase the crystallinity of the as‐prepared materials yet result in creating the impurities (Co(OH) 2 , Ni(OH) 2 and Fe 3 O 4 ) in addition to layered double hydroxide (LDH). Pure ternary CoNiFe LDH phase is obtained at the optimized condition at 130 °C for 12 h when Co/Ni molar ratios are 3:1 and 1:1. Cyclic voltammetry and galvanostatic charge/discharge tests display the capacitive performances at −20 °C of the ternary LDH material with Co/Ni molar ratio of 3:1 is superior to binary CoFe LDH.