TY - JOUR
T1 - Electrochemically Formed NaxMn[Mn(CN)6] Thin Film Anodes Demonstrate Sodium Intercalation and Deintercalation at Extremely Negative Electrode Potentials in Aqueous Media
AU - Yun, Jeongsik
AU - Schiegg, Florian A.
AU - Liang, Yunchang
AU - Scieszka, Daniel
AU - Garlyyev, Batyr
AU - Kwiatkowski, Anika
AU - Wagner, Thomas
AU - Bandarenka, Aliaksandr S.
N1 - Publisher Copyright:
Copyright © 2017 American Chemical Society.
PY - 2018/1/22
Y1 - 2018/1/22
N2 - The development of electrode materials for Na-ion batteries has been substantially accelerated recently with respect to application in grid energy storage systems. Specifically, development of Na-ion batteries operating in aqueous media is considered more promising for this application due to safety issues. Many different types of cathode materials for aqueous Na-ion batteries have been proposed; however, the number and performance of contemporary anode materials are still insufficient for practical deployment. In this work, we demonstrate that electrochemically deposited NaxMn[Mn(CN)6] thin films are very promising anode materials for aqueous Na-ion batteries. NaxMn[Mn(CN)6] films exhibit (i) very low half-charge potential ca. -0.73 V vs SHE (ca. -0.93 V vs SSC) being one of the lowest among those reported in the literature for the electrode materials, which also inhibit hydrogen evolution reaction; (ii) a specific capacity of ca. 85 mA h g-1 and (iii) only ∼3% loss of capacity and high round-trip efficiency (99.6%) after 3,000 cycles. Surprisingly, the choice of the electrolyte composition has a very strong influence not only on the intercalation process but also on the long-term performance of battery anodes and their electrode surface morphology.
AB - The development of electrode materials for Na-ion batteries has been substantially accelerated recently with respect to application in grid energy storage systems. Specifically, development of Na-ion batteries operating in aqueous media is considered more promising for this application due to safety issues. Many different types of cathode materials for aqueous Na-ion batteries have been proposed; however, the number and performance of contemporary anode materials are still insufficient for practical deployment. In this work, we demonstrate that electrochemically deposited NaxMn[Mn(CN)6] thin films are very promising anode materials for aqueous Na-ion batteries. NaxMn[Mn(CN)6] films exhibit (i) very low half-charge potential ca. -0.73 V vs SHE (ca. -0.93 V vs SSC) being one of the lowest among those reported in the literature for the electrode materials, which also inhibit hydrogen evolution reaction; (ii) a specific capacity of ca. 85 mA h g-1 and (iii) only ∼3% loss of capacity and high round-trip efficiency (99.6%) after 3,000 cycles. Surprisingly, the choice of the electrolyte composition has a very strong influence not only on the intercalation process but also on the long-term performance of battery anodes and their electrode surface morphology.
KW - Na intercalation
KW - Na-ion battery anodes
KW - NaMn[Mn(CN)]
KW - aqueous Na-ion batteries
KW - electrochemical impedance spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85046902273&partnerID=8YFLogxK
U2 - 10.1021/acsaem.7b00022
DO - 10.1021/acsaem.7b00022
M3 - Article
AN - SCOPUS:85046902273
SN - 2574-0962
VL - 1
SP - 123
EP - 128
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 1
ER -