The dominance of lithium-ion batteries in the market, although it can still last a long time, but it does not affect other types of battery "each to do".
Scientists at the University of California, Santa Barbara are studying sodium-ion batteries and have found that the unexpected presence of hydrogen is the reason for the shortcomings of sodium-ion battery technology in terms of degradation and performance. According to calculations for sodium ion technology, if hydrogen were excluded from the entire material production process, it would dramatically improve the performance of sodium ion batteries, bringing them to a level competitive with lithium ion batteries.
The production of lithium-ion batteries has been rising exponentially, and the potential problems with the procurement of materials needed for the batteries and lithium itself, especially in the case of power lithium batteries, have become more prominent. Recycling and upcycling is one way to save on battery costs, but researchers have been painstakingly exploring new types of batteries for new opportunities in order to obtain more abundant and cost-saving batteries.
Replacing lithium with sodium is a research direction for many in the battery community. The full commercialization of this technology is still debatable, because the shortcomings of lithium-ion batteries include degradation problems and loss of performance, while the "hard" sodium-ion batteries are degraded and lose performance faster than lithium-ion batteries. Therefore, despite the low cost, high safety and environmental friendliness of sodium ion batteries, the challenge is how to change their faster degradation rate.
A new paper from the university, published in the journal Materials Chemistry, shows that the scientists calculated that most of the degradation in a common cathode material, sodium manganese oxide, is caused by the presence of hydrogen in it. They also suggest that a similar mechanism may adversely affect the performance of lithium-ion batteries, but more research is needed to prove this.
Hydrogen, the most abundant element known in the universe, enters materials at many stages of battery fabrication, and its effect on various renewable materials is an important area of research. calculations at UCSB show that the presence of hydrogen in the manganese oxide layer reduces the energy required to break and dissolve the manganese atoms.
"Because hydrogen atoms are small and reactive, they are a common contaminant in materials. Now that we are aware of the harmful effects of hydrogen, then measures can be taken during the fabrication and encapsulation of the battery to inhibit its binding to hydrogen and thus improve battery performance," explained Chris VandeWalle, a computational materials scientist at Santa Barbara.
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