Preparation and Characterization of Electrodes for Na-ion batteries: Na2FeP2O7 and Na0.67MnO2
Creators: name: Kucinkis, Gints
name: Nestrova, Inara
name: Kruze, Beate
name: Bajars, Gunars
name: Erts, Donats
Publisher: name: Zenodo
Year: 2022
Subjects: energy harvesting
sustainable materials
waste heat
h2020
EU funded
waste heat recovery
waste heat to electricity
batteries
electrochemistry
nanocomposites
Na-ion
cathodes
alternative to the Li-ion battery systems
SEI-stabilizing electrolyte additive FEC
optimization of electrode preparation
selection of electrolyte in Na-ion battery cells

description: ABSTRACT

Keywords: Batteries, electrochemistry, nanocomposites, Na-ion, cathodes

Actuality and aimNa-ion batteries are a more sustainable alternative to the Li-ion battery systems that currently dominate theenergy storage. Many of the materials and structures used in Li-ion batteries can be transferred to Na-ionchemistry. However, many questions regarding the optimization of active materials and formulation ofelectrodes and electrolyte are still unclear [1]. This work studies two cathode materials – Na2FeP2O7 andNa0.67MnO2 – and optimizes their formulations.

MethodsSelected cathodes were synthesized, their structure and electrochemical properties characterized as a function ofcarbon content, binder used in the electrode and presence (or absence) of SEI-stabilizing electrolyte additive FEC.

ResultsWe find that Na2FeP2O7 is stable for over 500 cycles at 1 C if 1 M NaClO4 electrolyte in propylene carbonate (PC)with 5 wt.% fluoroethylene carbonate (FEC) additive is used as an electrolyte [2]. Stability of Na2FeP2O7 in waterhas also been studied. Moreover, we also show that TBA alginate binder can improve the capacity of Na0.67MnO2electrodes while unfortunately not mirroring the positive impact on cycle life that Na alginate binder has [3].

ConclusionsThe results provide new insights into optimization of electrode preparation and selection of electrolyte in Na-ionbattery cells.

AcknowledgementsPart of research was funded by Latvian Council of Science, agreement No lzp-2020/1-0391 and is acknowledgedby IN, BK and GV. For selected experiments on Na2FeP2O7, Horizon 2020 research and innovation programmeunder grant agreement number 964251 (FET-Open project TRANSLATE) is acknowledged. Project CAMART² hasreceived funding from the Horizon 2020 Framework ProgrammeH2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508.

References[1] N. Tapia-Ruiz et al., J. Phys. Energy. 3 (2021) 031503. https://doi.org/10.1088/2515-7655/ac01ef.[2] G. Kucinskis et al., J. Alloys Compd. 895 (2022) 162656. https://doi.org/10.1016/j.jallcom.2021.162656.[3] G. Kucinskis et al., Batteries. 8 (2022) 6. https://doi.org/10.3390/batteries8010006.
description: This presentation was delivered by Dr Gints Kucinkis at the Joint International Scientific Conference "Functional Materials and Nanotechnologies" and "Nanotechnologies and Innovations in the Baltic Sea Region" (FM&NT - NIBS 2022). This was held at the University of Latvia, Riga.

TRANSLATE is a €3.4 million EU-funded research project that aims to develop a new nanofluidic platform technology to effectively convert waste heat to electricity. This technology has the potential to improve the energy efficiency of many devices and systems, and provide a radically new zero-emission power source. The TRANSLATE project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 964251, for the action of 'The Recycling of waste heat through the Application of Nanofluidic ChannelS: Advances in the Conversion of Thermal to Electrical energy'. More information can be be found on the TRANSLATE project website: https://translate-energy.eu/