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LiFe1−xMIIxPO4/C (MII = Co, Ni, Mg) as cathode materials for lithi-um-ion batteriesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
- Авторы: Svetlana Novikova, Sergey Yaroslavtsev, Vyacheslav Rusakov, Tatyana Kulova, Alexander Skundin, Andrey Yaroslavtsev
- Журнал: Electrochimica Acta
- Том: 122
- Год издания: 2013
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 180
- Последняя страница: 186
- DOI: 10.1016/j.electacta.2013.08.118
- Аннотация: LiFe1−xMIIxPO4/C (MII = Co, Ni, Mg) composites had been obtained by sol–gel method. Structure and morphology of the obtained materials have been studied with the use of the XRD-analysis, SEM and Mössbauer spectroscopy. Their electrochemical behavior has been investigated with the use of charge/discharge tests. The materials doped by cobalt and nickel were shown to be characterized by an increased lithium intercalation and deintercalation rates, and retain a high capacity during charge and discharge the battery at high currents densities (LiFe0.9Ni0.1PO4 capacity amounts to 145 and 62 mAh/g at a discharge current 50 and 3000 mA/g). Mg2+ incorporation into LiFePO4/C cathode material results in the slight increase of charge/discharge rate and significant capacity decrease. Mössbauer spectroscopy has shown that MII ions in the LiFe1−xMIIxPO4/C (MII = Co, Ni) materials are orderly distributed both in charged and discharged states, each iron ion has no more than one MII ion in the nearest environment. In the case of Ni-doped samples the ordering is less pronounced. The reasons of the changes observed in the electrochemical performances and charge/discharge rate have been discussed on the base of Mössbauer spectroscopy and XRD data.
- Добавил в систему: Русаков Вячеслав Серафимович