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The capacitive properties of supercapacitors highly rely on the reasonable design of high‐performance electrode materials. Herein, a synergetic strategy of pre‐oxidation and pre‐carbonization is proposed to prepare coal tar pitch (CTP) based porous carbon. The formation mechanism of porous carbon is revealed. Pre‐oxidation increases the heteroatom content and promotes the decomposition of polycyclic...
Silicon (Si) is regarded as the most potential anode material for next‐generation lithium‐ion batteries (LIBs). However, huge volume expansion hinders its commercial application. Here, a yolk‐shell structural nitrogen‐doped carbon coated Si@SiO2 is prepared by SiO2 template and HF etching method. The as‐prepared composite exhibits superior cycling stability with a high reversible capacity of 577 mA...
Zn–air battery (ZAB) is advocated as a more viable option in the new‐energy technology. However, the limited‐output capacity at a high current density impedes the driving range in power batteries substantially. Here, a novel heterojunction‐based graphdiyne (GDY) and Ag29Cu7 alloy quantum dots (Ag29Cu7 QDs/GDY) for constructing a high‐performance aqueous ZAB are fabricated. The as‐fabricated ZAB achieves...
Porous carbon is widely used in energy storage‐conversion systems, and the question of how to explore an efficient strategy for preparation is very significant. Herein, the flame retardant capability of (NH4)2SO4/Mg(OH)2 that contains gas phase‐heat absorption‐condensate phase components is assisted to carbonize coal tar pitch in air and obtain the porous carbon. The mechanism of stepwise inflaming...
The growth of Na‐dendrites and the dissolution of organic cathodes are two major challenges that hinder the development of sodium‐organic batteries (SOBs). Herein, a multifunctional Janus separator (h‐BN@PP@C) by using an interfacial engineering strategy, is proposed to tackle the issues of SOBs. The carbon layer facing the organic cathode serves as a barrier to capture dissolved organic materials...
In the search for sustainable cathode materials for aqueous zinc ion batteries (AZIBs), vanadium (V)‐based materials have garnered interest, primarily due to their abundance and multiple oxidation states. Among the contenders, Li3VO4 (LiVO) stands out for its affordability, high specific capacity, and elevated ionic conductivity. However, its limited electrical conductivity results in significant...
The inherent slow diffusion dynamics of aqueous zinc‐ion batteries (AZIBs) act as a significant hindrance to their universal utilization as energy storage systems, largely attributed to the scarcity of superior cathode materials. In this study, a novel method that amalgamates oxygen defect engineering and polymer intercalation, guided by theoretical computations, to confront this challenge, is introduced...
Aqueous zinc ion batteries (AZIBs) have attracted attention as a promising candidate for secondary battery energy storage due to their safety and environmental benefits. However, the vanadium‐based cathode material NH4V4O10 has the problem of structural instability. In this paper, it is found by density functional theory calculation that excessive NH4+ located in the interlayer will repel the Zn2+...