Vanadium oxide (VO) cathode with large theoretical capacity has attracted much attention for aqueous zinc-ion batteries (ZIBs). However, VO cathode suffers from poor zinc-ion (Zn) diffusion kinetics, hindering the development of ZIBs for practical application. Herein, large lattice spacing vanadium-based compound (L-VO) was designed by the pillar between the V-O layers, in which the lattice spacing has increased from 1.15 nm (VO) to 1.64 nm (L-VO). Owing to the large lattice spacing, the L-VO cathode shows rapid Zn diffusion kinetics, delivering high capacity of 399 mAh/g and stable cycle performance (retention rate of 95 % after 2000 cycles).

中文翻译：

---

大晶格间距钒基化合物作为水系锌离子电池稳定正极

具有大理论容量的氧化钒（VO）正极在水系锌离子电池（ZIB）中备受关注。然而，VO阴极的锌离子（Zn）扩散动力学较差，阻碍了ZIBs的实际应用发展。在此，通过VO层之间的柱设计了大晶格间距钒基化合物（L-VO），其中晶格间距从1.15 nm（VO）增加到1.64 nm（L-VO）。由于晶格间距较大，L-VO正极表现出快速的Zn扩散动力学，可提供399 mAh/g的高容量和稳定的循环性能（2000次循环后保留率为95%）。