Cathode materials of energy storage batteries have attracted extensive attention because of the importance in deciding the rate performance and long cycle property of batteries. Herein, we report a simple and environmentally friendly solvothermal method to prepare Zn-doped VO₂(B) cathode materials. The introduction of zinc ions can effectively regulate the lattice structure, surface morphology and internal defect state of Zn-VO₂(B) nano materials. The sample with Zn content x = 1.5% has smaller cell volume and grain size, and higher concentration of vacancy defects. These microstructures ensure the structural stability during ion embedding process and, thus, this sample shows excellent electrochemical performances. The capacitance retention rate still maintains 88% after 1000 cycles at the current density of 0.1 A·g⁻¹. The enhanced performances of Zn-doped VO₂(B) samples may lay a foundation for the improvement of electrochemical performances of VO₂(B) cathode materials for energy storage batteries in the future.

中文翻译：

---

Zn-VO2(B) 纳米棒的晶格畸变、缺陷演变和电化学性能改进

储能电池正极材料因其在决定电池倍率性能和长循环性能方面的重要性而受到广泛关注。在此，我们报道了一种简单且环保的溶剂热法来制备Zn掺杂的VO ₂ (B)正极材料。锌离子的引入可以有效调控Zn-VO ₂ (B)纳米材料的晶格结构、表面形貌和内部缺陷态。Zn含量为x的样品= 1.5% 具有更小的单元体积和晶粒尺寸，以及更高的空位缺陷浓度。这些微结构确保了离子嵌入过程中的结构稳定性，因此，该样品显示出优异的电化学性能。^{在0.1 A·g -1}的电流密度下，1000次循环后电容保持率仍保持在88% 。Zn掺杂VO ₂ (B)样品的增强性能可为未来储能电池VO ₂ (B)正极材料电化学性能的提高奠定基础。