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Batteries 2018, 4(1), 8; https://doi.org/10.3390/batteries4010008

High-Performance Na0.44MnO2 Slabs for Sodium-Ion Batteries Obtained through Urea-Based Solution Combustion Synthesis

1
Department of Chemistry and INSTM, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
2
Helmholtz Institute Ulm (HIU), Helmholtzstraße 11, 89081 Ulm, Germany
3
Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
Received: 30 December 2017 / Revised: 17 January 2018 / Accepted: 31 January 2018 / Published: 9 February 2018
(This article belongs to the Special Issue Recent Advances in Post-Lithium Ion Batteries)
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Abstract

One of the primary targets of current research in the field of energy storage and conversion is the identification of easy, low-cost approaches for synthesizing cell active materials. Herein, we present a novel method for preparing nanometric slabs of Na0.44MnO2, making use of the eco-friendly urea within a solution synthesis approach. This kind of preparation greatly reduces the time of reaction, decreases the thermal treatment temperature, and allows the obtaining of particles with smaller dimensions compared with those obtained through conventional solid-state synthesis. Such a decrease in particle size guarantees improved electrochemical performance, particularly at high current densities, where kinetic limitations become relevant. Indeed, the materials produced via solution synthesis outperform those prepared via solid-state synthesis both at 2 C, (95 mA h g−1 vs. 85 mA h g−1, respectively) and 5 C, (78 mA h g−1 vs. 68.5 mA h g−1, respectively). Additionally, the former material is rather stable over 200 cycles, with a high capacity retention of 75.7%. View Full-Text
Keywords: sodium-ion battery; cathode; solution combustion synthesis; capacity retention; Na0.44MnO2 sodium-ion battery; cathode; solution combustion synthesis; capacity retention; Na0.44MnO2
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ferrara, C.; Tealdi, C.; Dall’Asta, V.; Buchholz, D.; Chagas, L.G.; Quartarone, E.; Berbenni, V.; Passerini, S. High-Performance Na0.44MnO2 Slabs for Sodium-Ion Batteries Obtained through Urea-Based Solution Combustion Synthesis. Batteries 2018, 4, 8.

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