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New materials for Li-ion batteries : synthesis and spectroscopic characterization of Li2(FeMnCo) SiO4 cathode materials
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Ferrari, Stefania , Mozzati, Maria Cristina, Lantieri, Marco, Spina, Gabriele, Capsoni, Doretta and Bini, Marcella (2016) New materials for Li-ion batteries : synthesis and spectroscopic characterization of Li2(FeMnCo) SiO4 cathode materials. Scientific Reports, 6 . 27896. doi:10.1038/srep27896
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Official URL: http://dx.doi.org/10.1038/srep27896
Abstract
Improving cathode materials is mandatory for next-generation Li-ion batteries. Exploring polyanion compounds with high theoretical capacity such as the lithium metal orthosilicates, Li2MSiO4 is of great importance. In particular, mixed silicates represent an advancement with practical applications. Here we present results on a rapid solid state synthesis of mixed Li2(FeMnCo)SiO4 samples in a wide compositional range. The solid solution in the P21/n space group was found to be stable for high iron concentration or for a cobalt content up to about 0.3 atom per formula unit. Other compositions led to a mixture of polymorphs, namely Pmn21 and Pbn21. All the samples contained a variable amount of Fe3+ ions that was quantified by Mössbauer spectroscopy and confirmed by the TN values of the paramagnetic to antiferromagnetic transition. Preliminary characterization by cyclic voltammetry revealed the effect of Fe3+ on the electrochemical response. Further work is required to determine the impact of these electrode materials on lithium batteries.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries , Cathodes, Ions, Electrodes | ||||||||
| Journal or Publication Title: | Scientific Reports | ||||||||
| Publisher: | Nature Publishing Group | ||||||||
| ISSN: | 2045-2322 | ||||||||
| Official Date: | 13 June 2016 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 17 June 2016 | ||||||||
| Volume: | 6 | ||||||||
| Article Number: | 27896 | ||||||||
| DOI: | 10.1038/srep27896 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| Funder: | Fondazione Cariplo [The Cariplo Foundation] | ||||||||
| Grant number: | Cariplo Project 2011–0325 |
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