A NASICON‐Type Positive Electrode for Na Batteries with High Energy Density: Na 4 MnV(PO 4 ) 3 | Zendy

Chen Fan | Zendy; Kovrugin Vadim M. | Zendy; David Rénald | Zendy; Mentré Olivier | Zendy; Fauth François | Zendy; Chotard JeanNoël | Zendy; Masquelier Christian | Zendy

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A NASICON‐Type Positive Electrode for Na Batteries with High Energy Density: Na 4 MnV(PO 4 ) 3

Author(s) -

Chen Fan,

Kovrugin Vadim M.,

David Rénald,

Mentré Olivier,

Fauth François,

Chotard JeanNoël,

Masquelier Christian

Publication year - 2019

Publication title -

small methods

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.66

H-Index - 46

ISSN - 2366-9608

DOI - 10.1002/smtd.201800218

Subject(s) - fast ion conductor , analytical chemistry (journal) , gravimetric analysis , electrochemistry , electrode , cathode , materials science , battery (electricity) , chemistry , inorganic chemistry , electrolyte , thermodynamics , power (physics) , physics , organic chemistry , chromatography

The mixed Mn 2+ /V 3+ Na‐super‐ionic‐conductor (NASICON) cathode material Na 4 MnV(PO 4 ) 3 is prepared by solid‐state reaction at 800 °C under argon. When used as a positive electrode in Na batteries, this material can exchange three electrons for two transition metals, that is, yielding a high gravimetric capacity of 156 mAh g −1 on charge when the upper cutoff voltage is set to 4.3 V versus Na + /Na. Operando X‐ray diffraction during battery operation is performed and it is shown that the mechanisms of Na + insertion/extraction are single or biphasic depending on the electrochemical cycling conditions.

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