It is expected to replace lithium-ion batteries! US scientists develop new "dream battery"
American scientists published a paper in the latest issue of the "Journal of the American Chemical Society" saying that they have developed a new type of sodium-sulfur battery that solves the problems of dendrites commonly faced by similar batteries and makes the battery life longer - after 300 cycles Charge and discharge are still stable performance. The latest research is an important milestone on the road to commercialization of sodium-sulfur batteries, which are expected to replace the widely used lithium-ion batteries in the future.
: Physicists Organization Network
Lithium{0}} roj teeb ion tam sim no tau siv dav hauv cov xov tooj smartphones thiab tsheb fais fab. Txawm li cas los xij, lithium thiab cobalt, cov khoom siv raw rau kev tsim cov lithium- ion roj teeb, tsis yog tsuas yog txwv rau kev khaws cia, tab sis kuj muaj qee yam tsis zoo rau ib puag ncig, suav nrog kev siv dej hauv av ntau, muaj kuab paug. ntawm av thiab dej qhov chaw, carbon emissions siab. Cov ntaub ntawv xws li sodium thiab sulfur yog pheej yig dua, yooj yim dua (sodium tuaj yeem tau los ntawm dej hiav txwv) thiab ntau tus phooj ywg ib puag ncig. Nrog rau qhov no hauv siab, cov kws tshawb fawb tau ua haujlwm ntawm sodium - cov roj teeb uas tuaj yeem ua haujlwm ntawm chav tsev kub rau 20 xyoo dhau los.
The latest research leader, Professor Arumgan Mantiram, Director of the Materials Institute at the University of Texas at Austin, said: "The sodium and sulfur are abundant, environmentally friendly, and cost-effective, making sodium-sulfur batteries a promising alternative. kind of 'dream battery'."
In two recent studies of sodium batteries by Mantiram's team, the scientists adjusted the composition of the electrolyte to help ions move back and forth between the cathode and anode, stimulating the charging and discharging of the battery. In addition, they have overcome a common problem in sodium batteries -- needle-like dendrites that grow on the battery's anode, causing the battery to rapidly age, short-circuit, and even catch fire and explode.
The researchers explain that in previous sodium-sulfur battery electrolytes, intermediate compounds formed from sulfur would dissolve in the electrolyte and shuttle between the two electrodes within the battery, leading to material loss, component degradation and dendrite formation. The new electrolyte they formulated uses an inert (not involved in chemical reaction) solvent to dilute the concentrated salt solution, thereby keeping the electrolyte in a "semi-dissolved" state. The results show that the new electrolyte can prevent the dissolution of sulfur, thus solving the shuttle and dendrite problems. This allows the battery to last longer, showing stable performance after 300 charge-discharge cycles.
Cov nqi lithium tau nce siab tshaj xyoo dhau los, thiab hu rau lwm txoj hauv kev lithium- ion roj teeb tau nrov dua. Cov kws tshawb fawb tau npaj los tsim qhov kev ua tiav no los ntawm kev sim cov roj teeb loj dua kom pom tias lawv tuaj yeem siv tau rau lub tsheb hluav taws xob thiab kev cia cov khoom siv hluav taws xob txuas ntxiv xws li cua thiab hnub ci.
