Atomistic Scale Modeling of Anode/Electrolyte Interfaces in Li-Ion Batteries acs.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from acs.org Daily Mail and Mail on Sunday newspapers.
While porous carbon is widely used as a metallic lithium host framework, the weak wettability of the carbon hinders its usage. For this purpose, herein, we functionalized the porous carbon with oxidized nitrogen groups by utilizing nitric acid. We found that the functionalized porous carbon demonstrated an enhanced wettability compared to its non-functionalized counterpart. Moreover, by functionalizing the carbon surface with oxidized nitrogen during lithium plating and stripping, catalyzed lithium nitride (Li3N) formed in the solid electrolyte interphase which effectively enhanced the surface morphology of lithium deposition. The electrochemical measurements showed a massive improvement in the capacitive behavior of the functionalized porous carbon and an enhanced electrochemistry performance in terms of cyclability and reversibility.
In traditional non-flammable electrolytes a trade-off always exists between non-flammability and battery performance. Previous research focused on reducing free solvents and forming anion-derived solid-electrolyte interphase. However, the contribution of solvated anions in boosting the stability of electrolyte has been overlooked. Here, we resolve this via introducing anions into Li+ solvation sheaths using anions with similar Gutmann donor number (DN) to that of solvents. Taking trimethyl phosphate fire-retardant (DN=23.0 kcal mol−1) and NO3− (DN=22.2 kcal mol−1) as an example, NO3− is readily involved in the Li+ solvation sheath and reduces the polarity of solvent. This results in boosted stability of electrolyte against Li. The developed non-flammable electrolyte has low viscosity, high ionic conductivity and is low cost. The reversibility of Li-Cu cell was improved to 99.49 % and the lifespan of practical LMBs was extended by >100 %.
Using quantum methods to predict next-gen lithium-metal battery reactivity miragenews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from miragenews.com Daily Mail and Mail on Sunday newspapers.