材料科学
板层(表面解剖学)
阳极
扩散阻挡层
储能
钾
电导率
过渡金属
电极
化学工程
纳米技术
光电子学
复合材料
化学
冶金
物理化学
图层(电子)
催化作用
工程类
物理
功率(物理)
量子力学
生物化学
作者
Qingkui Peng,Fangxin Ling,Hai Yang,Peiyu Duan,Rui Xu,Qingsong Wang,Yan Yu
标识
DOI:10.1016/j.ensm.2021.04.032
摘要
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have become promising anode materials for potassium-ion batteries (KIBs) due to their high theoretical capacity and large interlayer spacing. The application of TMDCs is prevented by their volume expansion during cycling and relatively poor conductivity. Herein, we developed a general strategy to prepare a series of NbSe2-based misfit layered compounds MLCs ((SnSe)1.16NbSe2, (PbSe)1.14NbSe2) by a facile top-down process. The unique sandwich structure of MLCs combines the excellent structure stability and conductivity of NbSe2 with the high reactivity of selenides (SnSe and PbSe), which greatly improves the potassium storage performance. The high-strength lamella and weak interlayer bonding of NbSe2 improve the K+ diffusion rate, leading to high rate-capability of the MLCs. This work provides a new avenue for designing novel types of sandwich structured electrode materials for energy storage systems.
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