WSe_(2)/MoSe_(2)with a better-matched heterointerface dominating high-performance potassium/sodium storage  

作　　者：Zhi-Yuan Song Yun-Dong Cao Lin-Lin Fan Jian Song Yi Feng Hong Liu Cai-Li Lv Guang-Gang Gao 

机构地区：[1]Collaborative Innovation Center of Metal Nanoclusters and Photo/Electro-Catalysis and Sensing,School of Materials Science and Engineering,University of Jinan,Jinan,250022,China

出　　处：《Rare Metals》2025年第1期195-208,共14页稀有金属(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.22201098);the Natural Science Foundation of Shandong Province(Nos.ZR2021QB005 and ZR2021MB008);Jinan City“New University 20”Project(No.202228113).

摘　　要：Constructing a valid heterointerface with a built-in electric field is an effective strategy for designing energy storage anodes with exceptional efficiency for potassium-ion batteries(PIBs)and sodium-ion batteries(SIBs).In this study,WSe_(2)/MoSe_(2)nanosheets with a better-matched and stable heterojunction interface were uniformly embedded in carbon nanofiber frameworks(WSe_(2)/MoSe_(2)/CNFs).The ion/electron transfer kinetics were facilitated by heterointerfaces with an enlarged effective utilization range.Meanwhile,the heterointerface directed electron transfer from MoSe_(2)to WSe_(2)and had significant potassium adsorption capability.The ultra-high pseudocapacitance contribution originating from the heterostructure and morphological features of the WSe_(2)/MoSe_(2)nanosheets contributed to enhancing high-rate energy storage.Moreover,in situ X-ray diffraction and ex situ X-ray photoelectron spectroscopy revealed the potassification/depotassification behavior of the WSe_(2)/MoSe_(2)/CNFs during the conversion reaction.Consequently,after 500 cycles at 5 A·g^(-1),the WSe_(2)/MoSe_(2)/CNF anode demonstrated an outstanding long-term cycling performance of 125.6 mAh·g^(-1)for PIBs.While serving as a SIB electrode,it exhibited an exceptional rate capability of 243.5 mAh·g^(-1)at 20 A·g^(-1).With the goal of developing high-performance PIB/SIB electrode materials,the proposed strategy,based on heterointerface adaptation engineering,is promising.

关 键 词：HETEROINTERFACE Metal selenides Potassium-ion batteries Sodium-ion batteries High-rate capability 

分 类 号：TB3[一般工业技术—材料科学与工程]