Synthesis, characterization, and cell performance of LiNiVO4 cathode materials prepared by a new solution precipitation method

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Title:	Synthesis, characterization, and cell performance of LiNiVO4 cathode materials prepared by a new solution precipitation method
Authors:	Fey,GTK;Chen,KS
Contributors:	化學工程與材料工程學系
Keywords:	LITHIUM CELLS;LIMN2O4;INTERCALATION;STOICHIOMETRY;TEMPERATURE
Date:	1999
Issue Date:	2010-06-29 17:29:13 (UTC+8)
Publisher:	中央大學
Abstract:	LiNiVO4 was prepared by a new solution precipitation process using acetylacetonate as a reagent. The effects of pH value on the purity, grain size, lithium stoichiometry, and cycling behavior of LiNiVO4 were studied. Solution precipitation performed in an acidic medium of pH = 3 with heat-treatment at 450 degrees C for 12 h yielded pure and fine LiNiVO4 powders which showed lithium stoichiometry of 0.971 and narrow grain-size of 0.34 mu m. Under neutral and basic conditions, the LiNiVO4 particles were contaminated with NiO and formed aggregates with a larger grain size in the 0.36-0.54 mu m range. The resulting LiNiVO4 powders were characterized by TGA, XRD, ICP-AES, SEM, and AFM techniques. Moreover, the cycle behavior of LiNiVO4 products synthesized by a high temperature solid state method and this new solution precipitation method was compared and discussed. (C) 1999 Elsevier Science S.A. All rights reserved.
Relation:	JOURNAL OF POWER SOURCES
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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