Recent Developments in Alloying‐type Anode Materials for Potassium‐Ion Batteries

Abstract

As an energy-storage system, rechargeable potassium-ion batteries (PIBs) have aroused widespread attention in recent years due to their earth abundance, low standard redox potential, and high ionic conductivity. The development of high-performance electrode materials is key to optimize the battery performance and useful to improve the feasibility of PIB technology. In this sense, a minireview on alloying-type anode materials for advanced PIBs is provided, covering the potassium storage properties, reaction mechanisms, theoretical analysis, electrochemical performance, and suitable binders and electrolytes. 2 3 4 5 6 7 8

State-of-the-art anodes of potassium-ion batteries: synthesis, chemistry, and applications

“…Generally, a single atom can react with several K atoms, thereby leading to a substantially high specic capacity. 150,151 Among the alloying elements, Sb has attracted considerable attention because of its low working potential and high theoretical capacity (660 mA h g À1 ) induced by the formation of K 3 Sb. Qian et al successfully constructed a hierarchically porous alloying-type Sb on MXene paper.…”

A review on carbon nanomaterials for K‐ion battery anode: Progress and perspectives

“…While the complete potassiation of an Sb-based anode in a KIB forms K 3 Sb, the mechanism of K + storage differs from those of Li + and Na + storage in LIBs and SIBs. [209][210][211] McCulloch et al 212 fabricated an Sb-C nanocomposite for application as an anode in KIBs. This anode delivers a reversible capacity of $650 mAh g À1 , which is 98% of the theoretical capacity of Sb (Figure 9A), whereas bulk Sb shows much lower reversibility and lower capacity (Figure 9B).…”

Carbon Hollow Tube-Confined Sb/Sb2S3 Nanorod Fragments as Highly Stable Anodes for Potassium-Ion Batteries

“…The third method is compounding with carbon. The introduction of carbon can not only buffer the volume change and maintain the structural integrity of the Sb-based material but also facilitate to improve its conductivity. , In addition, such composites are designed expediently, so compounding with carbon is a facile and effective method for designing stable Sb-based materials. For example, Zheng et al used electrospray to prepare an extremely stable antimony–carbon composite for PIBs .…”