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With the advantages of high theoretical‐specific capacity and lowest working potential, lithium metal anode is considered as the most promising anode for next‐generation batteries. Here, a scalable dealloying method is developed to prepare nano‐sized bismuth (Bi). It is found that the Bi‐modification can not only enhance the wettability of the commercial polyethylene separator but also suppresses...
Pore‐structure design with increased ion‐diffusion ability is usually regarded as an effective strategy to improve K‐storage performance in hard carbon (HC). However, the relationship between porous structure and K+ migration behavior remains unclear and requires further exploration. Herein, a series of chemically activated hard carbon spheres (denoted as AHCSs) with controllable micro/mesopores structure...
Due to their characteristics of high capacity and appropriate potassiation/depotassiation potential, Sb‐based materials have become a class of promising anode materials for potassium ion batteries (PIBs). However, the huge strain induced by potassiation/depotassiation limits their ability to periodically accept/release K+. Herein, a composite with FeSb2 nanoparticles embedded in a 3D porous carbon...
Tin chalcogenides are regarded as promising anode materials for potassium ion batteries (PIBs) due to their considerable specific capacity. However, the severe volume effect, limited electronic conductivity, and the shuttle effect of the potassiation product restrict the application prospect. Herein, based on the metal evaporation reaction, a facile structural engineering strategy for yolk–shell SnSe...
Metallic Bi, as an alloying‐type anode material, has demonstrated tremendous potential for practical application of potassium‐ion batteries. However, the giant volume expansion, severe structure pulverization, and sluggish dynamics of Bi‐based materials result in unsatisfied rate performance and unstable cycling stability. Here, 2D bismuth@N‐doped carbon sheets with BiOC bond and internal void space...
Potassium‐Ion Storage
In article number 2203976, Songping Wu, Zhiguang Xu, Yurong Yan, and co‐workers successfully fabricate 2D bismuth@N‐doped carbon sheets with a powerful BiOC bond and internal void space for achieving ultrahigh rate and stable potassium‐ion storage. The influence of interface microstructure and chemical coupling on the electrochemical properties are revealed by ex/in‐situ techniques...
Potassium Storage
In article number 2204045, Hongyan Li and co‐workers present a unique spindle‐like bismuth‐based composite (SPB@NC) employed as anode for a potassium ion battery, which exhibits ultrafast potassium storage enhanced by the favorable electrode structure and the presence of BiOC bonds.
Bismuth (Bi)‐based materials have attracted great attention as anodes in potassium ion batteries (PIBs) for their high theoretical capacity and suitable voltage range. Herein, the authors report a unique spindle‐like structured Bi@N‐doped carbon composite (SPB@NC) consisting of interconnected nano‐Bi coated heteroatom‐doped hard carbon layer via an interesting in situ carbon thermal reduction method...
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