Li2NiTiO4?a new positive electrode for lithium batteries: soft-chemistry synthesis and electrochemical characterization

PRABAHARAN, S (2004) Li2NiTiO4?a new positive electrode for lithium batteries: soft-chemistry synthesis and electrochemical characterization. Solid State Ionics, 172 (1-4). pp. 39-45. ISSN 01672738

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Official URL: http://dx.doi.org/10.1016/j.ssi.2004.01.036

Abstract

A new lithium-rich phase-pure nanocrystalline Li2NiTiO4 was synthesized via an improved synthetic protocol adopting a simple soft-chemistry approach using carboxylic acid-nitrate method at temperature < 300 degreesC for the first time. The product was found to crystallize in a cubic rock-salt structure (cation-disordered) as confirmed by Rietveld pattern refinement analysis with the following lattice parameters: a = 4.1453(6) Angstrom (space group Fm3m). TEM analysis revealed that the size of the primary particles is within the range of 50 - 100 nm. The reversible lithium removal/insertion characteristics of this new material were demonstrated in a half cell containing the composite electrode of Li2NiTiO4, black carbon (AB) and PVDF binder (70:20: 10) against Li+/Li. Slow scan cyclicvoltammetry (SSCV) reveals the electrochemical cyclability and redox properties of the new material with deliverable reversible capacity of 91 MA h/g (C rate) and 96 mA h/g (C/2 rate) after first charge/discharge cycle. This high rate Li-insertion/extraction behavior is related to the particle size of the product. (C) 2004 Elsevier B.V. All rights reserved.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 19 Aug 2011 06:08
Last Modified: 19 Aug 2011 06:08
URI: http://shdl.mmu.edu.my/id/eprint/2454

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