钾离子电池负极的高性能潜在材料:锑

Potential High-Performance Anode Material for Potassium Ion Batteries:Antimony

近年来随着对储能器件的需求增加,钾离子电池受到越来越多的关注。钾的物理化学性质与锂相似,且在地壳中的储量丰富,在储能领域中具有广阔的发展前景。但由于电极材料实际容量远小于理论容量等问题的存在导致应用在钾离子电池的性能仍有不足。金属锑(Sb)具有较高的理论容量被广泛应用在电极材料上,然而在充放电过程体积变化过大导致稳定性较差,需要通过形貌控制、合金化、与碳材料复合等形式来提高结构稳定性。本文主要介绍了Sb材料在钾离子电池负极材料的研究进展,并展望了Sb电极材料的应用前景。

In recent years,with the increasing demand for energy storage devices,potassium ion batteries have attracted more and more attention.The physical and chemical properties of potassium is similar to those of lithium,and the reserve of potassium in the earth's crust is abundant,so potassium ion battery has a promising prospect in the field of energy storage.However,due to the fact that the actual capacity of electrode materials is far less than the theoretical capacity,the performance of potassium ion battery is still inadequate.Metallic antimony has a high theoretical capacity and is widely investigated as electrodes.However,too large volume change during charging-discharging process leads to the poor stability.The structural stability can be improved by controlling the morphology,alloying and introducing carbon framework.In this paper,the research progress of antimony materials as anodes for potassium ion batteries is introduced,and the application of antimony electrode is prospected.