A new Li-ion battery technology developed by the US Army has sparked the interest of Jeff Dahn, Tesla's most important research partner.
In the latest issue of the journal Nature, the CCDC Army Research Laboratory (ARL), part of the US Army, published a study demonstrating a new battery technology based on a new cathode chemistry.
They claim that the chemistry "is completely free of transition metal and delivers an unprecedented high capacity by reversibly storing Li-ion with a high potential (~ 4.2 V)."
According to the findings, the new technology "opens an opportunity to significantly increase the energy density of the lithium-ion battery while maintaining safety due to the aqueous nature of the electrolyte."
In combination with their earlier development of "water-in-salt electrolytes (WiSE)" they claim that they can achieve an impressive energy density of 460 Wh / Kg.
Some soldiers have to carry between 15 and 25 kilos of batteries and this technology can significantly reduce that weight while the battery becomes safer.
Dr. Kang Xu, an ARL colleague and senior research chemist, said about the development:
"So & # 39; n high energy, safe and potentially flexible new battery is likely to give Soldiers what they need on the battlefield: reliable high energy source with robust tolerance to abuse. It is expected that the Soldier's mobility and lethality will be significant while denying logistical requirements. "
While being developed for that purpose, ARL also says it could end up in "civil applications for portable electronics, electric vehicles and large-scale storage of grids."
Several researchers from the battery have commented on the new study, including Professor Jeff Dahn, who is particularly enthusiastic about the paper:
"The article from the University of Maryland and the Army team is the most creative new battery chemistry I've seen in at least 10 years. The fact that LiCl and LiBr are reversibly converted and form halogen intercalated graphite is truly incredible. team has demonstrated encouraging reversibility over 150 cycles and has demonstrated that high energy densities should be achievable in 4-volt cells that contain no transition metals and no non-aqueous solvents.It remains to be seen whether a practical long-lived commercial cell can be developed, but I am very enthusiastic about this research. "
Dahn is considered a pioneer in Li-ion battery cells. He has been working on the Li-ion batteries almost since they were invented. He is credited with helping to increase the life cycle of the cells, which helped their commercialization. His work now focuses primarily on a potential increase in energy density and sustainability.
In 2016, Dahn transferred his research group from their 20-year research agreement with 3M to a new association with Tesla under the newly formed & # 39; NSERC / Tesla Canada Industrial Research & # 39 ;.
Earlier this year we told him that he had to file a new patent for the Tesla battery cell – he claimed faster charging, a longer life and lower costs.
He and his students have developed new chemistry that already ends up in Tesla's batteries.
Regarding this new battery development, Dr. Kang that "more research is needed to scale it up to a practical large-scale battery."
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