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High power Nb-doped Lifelong₄ Li-ion battery cathodes; pilot-scale synthesis and electrochemical properties

Johnson, ID; Blagovidova, E; Dingwall, PA; Brett, DJL; Shearing, PR; Darr, JA; (2016) High power Nb-doped Lifelong₄ Li-ion battery cathodes; pilot-scale synthesis and electrochemical properties. Journal of Power Sources , 326 pp. 476-481. 10.1016/j.jpowsour.2016.06.128. Green open access

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Abstract

High power, phase-pure Nb-doped LiFePO₄ (LFP) nanoparticles are synthesised using a pilot-scale continuous hydrothermal flow synthesis process (production rate of 6 kg per day) in the range 0.01–2.00 at% Nb with respect to total transition metal content. EDS analysis suggests that Nb is homogeneously distributed throughout the structure. The addition of fructose as a reagent in the hydrothermal flow process, followed by a post synthesis heat-treatment, affords a continuous graphitic carbon coating on the particle surfaces. Electrochemical testing reveals that cycling performance improves with increasing dopant concentration, up to a maximum of 1.0 at% Nb, for which point a specific capacity of 110 mAh g⁻¹ is obtained at 10 C (6 min for the charge or discharge). This is an excellent result for a high power cathode LFP based material, particularly when considering the synthesis was performed on a large pilot-scale apparatus.

Type: Article
Title: High power Nb-doped Lifelong₄ Li-ion battery cathodes; pilot-scale synthesis and electrochemical properties
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jpowsour.2016.06.128
Publisher version: http://dx.doi.org/10.1016/j.jpowsour.2016.06.128
Language: English
Additional information: © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Cathode material, Li-ion battery, Doped, LiFePO₄, Niobium, Continuous hydrothermal
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1506002
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