Study of electrochemical properties and thermal stability of the high-voltage spinel cathode material for lithium-ion accumulators

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F15%3APU113077" target="_blank" >RIV/00216305:26220/15:PU113077 - isvavai.cz</a>

Result on the web

<a href="http://link.springer.com/article/10.1007/s10008-015-2772-4?sa_campaign=email/event/articleAuthor/onlineFirst" target="_blank" >http://link.springer.com/article/10.1007/s10008-015-2772-4?sa_campaign=email/event/articleAuthor/onlineFirst</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10008-015-2772-4" target="_blank" >10.1007/s10008-015-2772-4</a>

Result language

angličtina

Original language name

Study of electrochemical properties and thermal stability of the high-voltage spinel cathode material for lithium-ion accumulators

Original language description

This article deals with the properties of high-voltage cathode material LiNi0.5Mn1.5O4 synthesised by a solid-state reactions method. The sample LiNi0.5Mn1.5O4 was synthesised by two steps of annealing process. A number of electrochemical and physical methods were used to analyse the samples. The obtained LiNi0.5Mn1.5O4 powder was characterised by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and galvanostatic charge/discharge measurements at different loads and high temperature in lithium-ion cells with metal lithium as a counter electrode. All these analyses were used for confirmation of the structure of the material LiNi0.5Mn1.5O4 and for investigating its electrochemical properties. A special analysis was used for this paper to understand and confirm the function of this type of material. It is called electron paramagnetic resonance (EPR) spectroscopy, which is used in the field of lithium-ion batteries and also which is not common. This analysis is typically used to analyse free radicals. It is possible to study changes of valence in cathode materials during charging and confirming the valence change of Mn from Mn3+ to Mn4+ and of Ni from Ni2+ to Ni3+ and then to Ni4+ with EPR analysis. Thermogravimetric (TG) analysis of stability of the material LiNi0.5Mn1.5O4 with in situ observation of structural changes by SEM was used as the last analysis.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Solid State Electrochemistry

ISSN

1432-8488

e-ISSN

1433-0768

Volume of the periodical

19

Issue of the periodical within the volume

6

Country of publishing house

DE - GERMANY

Number of pages

12

Pages from-to

1579-1590

UT code for WoS article

000354622700002

EID of the result in the Scopus database

2-s2.0-84929464926