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High Sodium Storage Performance
In article number 2302583, Yanqing Wang and co‐workers report a powerful yet simple method for fabricating porous hard carbon via liquid salt template‐assisted dual activation. The resulting material exhibits a high specific capacity of 367 mAh g−1 at 0.05 A g−1 and 92.9% initial coulombic efficiency (ICE) and ultra‐long cycle stability of 151 mAh g−1 after 12,000 cycles...
The slow solid diffusion dynamics of sodium ions and the side‐reaction of sodium metal plating at low potential in the hard carbon anode of sodium ion batteries (SIBs) pose significant challenges to the safety manipulation of high‐rate batteries. Herein, a simple yet powerful fabricating method is reported on for “egg puff”‐like hard carbon with few N doping using rosin as a precursor via liquid salt...
Metal–nitrogen–carbon (M–C/N) electrocatalysts have been shown to have satisfactory catalytic activity and long‐term durability for the oxygen reduction reaction (ORR). Here, a strategy to prepare a new electrocatalyst (Fe&Pd–C/N) using a unique metal‐containing ionic liquid (IL) is exploited, in which Fe & Pd ions are positively charged species atomically dispersed by coordination to the...
Due to its electronic structure, similar to platinum, molybdenum carbides (Mo2C) hold great promise as a cost‐effective catalyst platform. However, the realization of high‐performance Mo2C catalysts is still limited because controlling their particle size and catalytic activity is challenging with current synthesis methods. Here, the synthesis of ultrafine β‐Mo2C nanoparticles with narrow size distribution...
Compactness and versatility of fiber‐based micro‐supercapacitors (FMSCs) make them promising for emerging wearable electronic devices as energy storage solutions. But, increasing the energy storage capacity of microscale fiber electrodes, while retaining their high power density, remains a significant challenge. Here, this issue is addressed by incorporating ultrahigh mass loading of ruthenium oxide...
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