Structural characterization of the NLFMO and ARR demonstration. Credit: Natural energy (2024). DOI: 10.1038/s41560-023-01425-2
The ever-increasing demand for energy storage is driving research and development in battery technology. The sodium-ion battery is a reliable and affordable replacement for lithium-ion batteries. The ease of access and availability of sodium makes sodium-ion batteries more attractive and competitive.
Using elements abundant in the Earth and adjusting the growth phase of the layered oxide cathode, a long-cycle, high-energy sodium-ion battery has now been developed and validated at 165 Wh/kg with the collaboration by Dr. Qingsong. Wang, junior group leader at the Chair of Inorganic Active Materials for Electrochemical Energy Storage.
“Our results show that sodium-ion batteries are even more cost-effective and durable on an industrial scale than conventional lithium-ion batteries, based on iron phosphate chemistry,” says Wang.
In the study published in Natural energy by a team of scientists from the universities of Bayreuth (Germany), Xiamen (China), Shenzhen (China), the Argon National Laboratory (USA) and the Institute of Physics of the Chinese Academy of Sciences in Beijing (China), it is demonstrated that the intergrowth structure can be tailored by controlling the loading depth. This allows a prismatic-like stacking state to be inserted uniformly between octahedral-like stacking states.
This makes it possible to avoid neighboring octahedral stacking faults. Octahedral type and prismatic type refer to the geometric arrangement of atoms or ions in a crystal lattice. Octahedral type means that the atoms or ions in a crystal are arranged in an arrangement that resembles an octahedron. The prismatic type refers to an arrangement that resembles a prism.
“Our research is to analyze the anion redox reaction of oxygen as the energy amplifier of the layered oxide for the sodium ion cathode,” explains Wang.
“It is important to develop a strategy to make this reaction reversible and stable. In the long term, the results of our research can make mid-range electric vehicles more affordable, because their batteries can then be produced at lower cost and with a longer lifespan.
More information:
Xiaotong Wang et al, Realization of a high-performance sodium-ion pocket cell by regulating intergrowth structures in a layered oxide cathode with anion redox, Natural energy (2024). DOI: 10.1038/s41560-023-01425-2
Provided by the University of Bayreuth
Quote: Researchers develop long-cycle, high-energy sodium-ion battery (January 12, 2024) retrieved January 12, 2024 from
This document is subject to copyright. Except for fair use for private study or research purposes, no part may be reproduced without written permission. The content is provided for information only.
