A sol-gel route to titanium nitride conductive coatings on battery materials and performance of TiN-coated LiFePO4
A sol-gel route to titanium nitride conductive coatings on battery materials and performance of TiN-coated LiFePO4
New approaches to produce nanocrystalline TiN materials with high conductivity and their application as conductive coatings on battery materials have been developed. Sol-gel synthesis routes using tetrakis(dimethylamido)titanium(IV) and a propylamine or ammonia cross linking agent, followed by thermal treatment under NH3 or H2+N2, were found to produce TiN powders of small crystallite size (<10 nm), with good conductivity in selected cases. The most promising synthesis conditions were used to produce even TiN coatings on LiFePO4 particles, and the resulting materials exhibited significantly improved electrochemical performance relative to uncoated LiFePO4, in terms of higher specific capacity, cycle stability and rate capability. The material with the optimum 10 wt% TiN content exhibited a discharge capacity of 159 mA h g 1, that is ~93% of the theoretical capacity, when charge/discharge rates of 0.1 C were applied. The results demonstrate the suitability of this new route to produce TiN coatings, which could also be applied to high voltage materials or for materials to be operated at high temperatures, where corrosion or degradation of other coating materials (e.g. carbon) would be problematic.
2251-2260
Zhang, Min
a7325ff1-529e-4010-9877-36b486325e6a
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Hector, Andrew
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, John
067986ea-f3f3-4a83-bc87-7387cc5ac85d
3 January 2017
Zhang, Min
a7325ff1-529e-4010-9877-36b486325e6a
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Hector, Andrew
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, John
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Zhang, Min, Garcia-Araez, Nuria, Hector, Andrew and Owen, John
(2017)
A sol-gel route to titanium nitride conductive coatings on battery materials and performance of TiN-coated LiFePO4.
Journal of Materials Chemistry A, 5 (5), .
(doi:10.1039/C6TA09572K).
Abstract
New approaches to produce nanocrystalline TiN materials with high conductivity and their application as conductive coatings on battery materials have been developed. Sol-gel synthesis routes using tetrakis(dimethylamido)titanium(IV) and a propylamine or ammonia cross linking agent, followed by thermal treatment under NH3 or H2+N2, were found to produce TiN powders of small crystallite size (<10 nm), with good conductivity in selected cases. The most promising synthesis conditions were used to produce even TiN coatings on LiFePO4 particles, and the resulting materials exhibited significantly improved electrochemical performance relative to uncoated LiFePO4, in terms of higher specific capacity, cycle stability and rate capability. The material with the optimum 10 wt% TiN content exhibited a discharge capacity of 159 mA h g 1, that is ~93% of the theoretical capacity, when charge/discharge rates of 0.1 C were applied. The results demonstrate the suitability of this new route to produce TiN coatings, which could also be applied to high voltage materials or for materials to be operated at high temperatures, where corrosion or degradation of other coating materials (e.g. carbon) would be problematic.
Text
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Accepted/In Press date: 24 December 2016
e-pub ahead of print date: 3 January 2017
Published date: 3 January 2017
Organisations:
Electrochemistry
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Local EPrints ID: 404281
URI: http://eprints.soton.ac.uk/id/eprint/404281
ISSN: 2050-7488
PURE UUID: c279de42-e131-4747-a111-8ae9b29c91ae
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Date deposited: 05 Jan 2017 11:42
Last modified: 16 Mar 2024 04:14
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Author:
Min Zhang
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