ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Sustainable Aqueous Synthesis and Electrochemical Insights on High-Voltage Sodium Alluaudite Insertion Materials

Dwibedi, Debasmita and Baskar, Senthilkumar and Barpanda, Prabeer (2017) Sustainable Aqueous Synthesis and Electrochemical Insights on High-Voltage Sodium Alluaudite Insertion Materials. In: 232nd ECS Meeting, 1- 5 October 2017, National Harbor, pp. 337-342.

[img] PDF
ECS_ECSMeeting_80-10_337-342_2017.pdf - Published Version
Restricted to Registered users only

Download (669kB) | Request a copy
Official URL: https://doi.org/10.1149/08010.0337ecst


The scope of this work is to demonstrate various energy-savvy synthesis routes for alluaudite frameworked high-voltage sodium insertion hosts with generic formula Na(2)Na(1)M(1)M(2)2(XO4)3 (M = 3d metals; X= S/ P/ V/ W/ Mo). Here, we have explored two unconventional aqueous routes, namely Pechini and spray drying methods, for SO4-based alluaudites and solution combustion route PO4-based alluaudites. Using these sustainable routes, we could achieve the lowest ever synthesis temperature (ca. 200 °C) and the lowest synthesis duration (ca. 6 h) for sulfate class of alluaudites. Further, we have discovered a hitherto unknown electrochemically active NaCoFe2(PO4)3 phosphate alluaudite. The electrochemical analyses revealed a reversible (de)sodiation activity providing 80% of net theoretical capacity. Both sulphate and phosphate alluaudites delivered good rate capability and operational stability over 100 cycles maintaining a Coulombic efficiency of 98%.

Item Type: Conference Paper
Publication: ECS Transactions
Publisher: Electrochemical Society Inc.
Additional Information: The Copyright of this article belongs to the Electrochemical Society Inc.
Keywords: Iron compounds; Sodium; Sulfur compounds; Coulombic efficiency; Electrochemical analysis; Insertion materials; Operational stability; Solution combustion; Synthesis durations; Synthesis temperatures; Theoretical capacity; Sodium compounds
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 22 Jun 2022 04:41
Last Modified: 22 Jun 2022 04:41
URI: https://eprints.iisc.ac.in/id/eprint/73488

Actions (login required)

View Item View Item