Chemical modification approaches for improved performance of Na-ion battery electrodes

Bryan Byles; Mallory Clites; Ekaterina Pomerantseva

doi:10.1117/12.2188852

26 August 2015 Chemical modification approaches for improved performance of Na-ion battery electrodes

Bryan Byles, Mallory Clites, Ekaterina Pomerantseva

Proceedings Volume 9553, Low-Dimensional Materials and Devices; 955313 (2015) https://doi.org/10.1117/12.2188852
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

Na-ion batteries have received considerable attention in recent years but still face performance challenges such as limited cycle lifetime and low capacities at high current rates. In this work, we propose novel combinations of preand post-synthesis treatments to modify known Na-ion battery electrode materials to achieve enhanced electrochemical performance. We work with two model metal oxide materials to demonstrate the effectiveness of the different treatments. First, wet chemical preintercalation is combined with post-synthesis aging, hydrothermal treatment, and annealing of α-V₂O₅, resulting in enhanced capacity retention in a Na-ion battery system. The hydrothermal treatment resulted in an increased specific capacity of nearly 300 mAh/g. Second, post-synthesis acid leaching is performed on α- MnO_2, also resulting in improved electrochemical capacity. The chemical, structural, and morphological changes brought about by the modifications are fully characterized.

Conference Presentation

Citation Download Citation

Bryan Byles, Mallory Clites, and Ekaterina Pomerantseva "Chemical modification approaches for improved performance of Na-ion battery electrodes", Proc. SPIE 9553, Low-Dimensional Materials and Devices, 955313 (26 August 2015); https://doi.org/10.1117/12.2188852

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