- Español
- Português
- русский
- Français
- 日本語
- Deutsch
- tiếng Việt
- Italiano
- Nederlands
- ภาษาไทย
- Polski
- 한국어
- Svenska
- magyar
- Malay
- বাংলা ভাষার
- Dansk
- Suomi
- हिन्दी
- Pilipino
- Türkçe
- Gaeilge
- العربية
- Indonesia
- Norsk
- تمل
- český
- ελληνικά
- український
- Javanese
- فارسی
- தமிழ்
- తెలుగు
- नेपाली
- Burmese
- български
- ລາວ
- Latine
- Қазақша
- Euskal
- Azərbaycan
- Slovenský jazyk
- Македонски
- Lietuvos
- Eesti Keel
- Slovenski
- मराठी
- Srpski језик
New Generation of Lithium Batteries Reduces Reliance on Rare Metals
2022-03-10
To develop alternatives to lithium-based batteries and reduce dependence on rare metals, researchers at Georgia Tech have developed a new anode and electrolyte system that uses low-cost transition metal fluoride and solid polymer electrolytes instead of expensive metals as well as conventional liquid electrolytes, according to related research.
The new anode is fabricated from iron fluoride active material and solid polymer (plastic) electrolyte nanocomposites. To create such a negative electrode, the researchers were creative in their scheme of infiltrating the solid polymer electrolyte into the prefabricated iron fluoride electrode, followed by hot pressing the entire structure as a way to increase the density and reduce the gap. The polymer-based electrolyte has two outstanding advantages: it bends during cycling and adapts well to the expansion of iron fluoride, and secondly, it is able to form a very stable and flexible interface with iron fluoride. This solves the important problems of swelling and a large number of undesirable reactions of using iron fluoride in the design of conventional batteries.
The researchers tested the concentration of solid-state batteries and analyzed the performance of more than 300 charging and discharging cycles at high temperature of 50℃. The results indicate that the key to improving battery performance is the solid polymer electrolyte. When applied with the solid polymer electrolyte, the metal fluoride also showed excellent stability in high temperature environments. This is expected to lead to safer, lighter and cheaper lithium-ion batteries. Secondly, the lithium capacity of iron fluoride is more than twice that of conventional cobalt or nickel machine cathodes. And iron is 300 times cheaper than cobalt and 150 times cheaper than nickel. It will also be greatly reduced in cost.
However, the battery is still in the early stage and still cannot be mass produced because of the production cost.
The new anode is fabricated from iron fluoride active material and solid polymer (plastic) electrolyte nanocomposites. To create such a negative electrode, the researchers were creative in their scheme of infiltrating the solid polymer electrolyte into the prefabricated iron fluoride electrode, followed by hot pressing the entire structure as a way to increase the density and reduce the gap. The polymer-based electrolyte has two outstanding advantages: it bends during cycling and adapts well to the expansion of iron fluoride, and secondly, it is able to form a very stable and flexible interface with iron fluoride. This solves the important problems of swelling and a large number of undesirable reactions of using iron fluoride in the design of conventional batteries.
The researchers tested the concentration of solid-state batteries and analyzed the performance of more than 300 charging and discharging cycles at high temperature of 50℃. The results indicate that the key to improving battery performance is the solid polymer electrolyte. When applied with the solid polymer electrolyte, the metal fluoride also showed excellent stability in high temperature environments. This is expected to lead to safer, lighter and cheaper lithium-ion batteries. Secondly, the lithium capacity of iron fluoride is more than twice that of conventional cobalt or nickel machine cathodes. And iron is 300 times cheaper than cobalt and 150 times cheaper than nickel. It will also be greatly reduced in cost.
However, the battery is still in the early stage and still cannot be mass produced because of the production cost.
