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Mixed Anion Cathodes

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Designing of Novel Mixed Anion Compounds as High Voltage and High Energy Density...

Designing of Novel Mixed Anion Compounds as High Voltage and High Energy Density Sodium ion Battery Cathodes Sodium-ion batteries (SIBs) are being developed and explored as potential electric storage for the grid applications due to infinite resources for sodium at cheaper price. The major impediment for its commercialization is unavaila... ver más

18/05/2023

CEU

161K€

Presupuesto del proyecto: 161K€

Líder del proyecto

FUNDACION UNIVERSITARIA SAN PABLO CEU No se ha especificado una descripción o un objeto social para esta compañía.

Total investigadores 20

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2023-05-18

MSCA-IF-2019: Individual Fellowships

I+D

Cerrada hace 5 años

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Información adicional privada

No hay información privada compartida para este proyecto. Habla con el coordinador.

1 Participantes

CEU

160.93K€ | Lider

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Duración del proyecto: 36 meses Fecha Inicio: 2020-04-30
Fecha Fin: 2023-05-18

Líder del proyecto

FUNDACION UNIVERSITARIA SAN PABLO CEU No se ha especificado una descripción o un objeto social para esta compañía.

Total investigadores 20

Presupuesto del proyecto 161K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Sodium-ion batteries (SIBs) are being developed and explored as potential electric storage for the grid applications due to infinite resources for sodium at cheaper price. The major impediment for its commercialization is unavailability of cathodes that possesses high output voltage and delivers high energy density. The state-of-art SIB positive electrodes consist of cathodes with the highest output potential (≤ 3.5 V) exhibiting lower specific capacities (150 mAh/g) while V2O5 cathodes delivered high specific capacity (225 mA/g) at low potential (2.5 V). Therefore, it will beneficial to design cathodes with high output voltage and capacity to build high energy density SIBs. In this project, the above drawbacks are mitigated by designing a new class of mixed anion compounds, vanadium oxyfluorides as novel cathode materials which are expected to deliver high specific capacities at higher operating voltage (≥ 3 V). These compounds are synthesized by partial fluorination using a non-hazardous organic reagents and novel one-pot microwave assisted methods. The as-prepared materials are characterized to identify their chemical compositions and crystallography using TEM, neutron and synchrotron diffraction techniques. These cathodes are subjected to electrochemical testing in a typical CR2032 coin cells. The solid state NMR is used to study the local structure and Na+ mobility inside cathode host while in-situ XPS provides insight into change in electrode composition at various stages of cycling. The electrochemical pulsed technique and impedance spectroscopy are used to determine diffusion coefficient of Na+ and electrochemical mechanism. The optimized materials will be further tested in a pouch cells resembling a real device. Therefore, this project elucidates the designing of a new class of mixed anions cathodes with high output voltage (≥ 3 V) and deliver high specific capacity (225 mAh/g) for fabricating high energy density SIBs (675 Wh/kg) for efficient grid storage.

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