Heteroatom doping has always been a common modification method for lithium-ion batteries (LIBs) cathodes. The addition of guest heteroatoms to the material can adjust the microstructure of the host material, and enlarge the lattice spacing or form the vacancy defect of oxygen, which can effectively improve the Electrochemical performance of materials. Herein, CO₂-modified VO₂(B) nanorods were synthesized via a simple one-step hydrothermal method. Thanks to the extended layer spacing in VO₂(B) that results from CO₂ small molecules, the synthesized CO₂-VO₂ electrode exhibits a high initial capacity of 251.1 mA g⁻¹ at 100 mA g⁻¹, and a capacity retention of 81.8 % after 80 cycles. It is worth noting that the CO₂-VO₂ electrode also has a high rate capacity (170.0 mAh g⁻¹ at 1 A g⁻¹), and the capacity recovery rate can reach 84.5 % even under the condition of variable current. Further studies showed that the role of CO₂ small molecules as a pillar in the interlayer of VO₂(B) and a weak electrostatic attraction between O_CO2 and Li⁺ existed, resulting in a robust crystal structure and convenient Li-ion diffusion conditions during the (de)intercalation of lithium ions in VO₂(B). This study opens the way for further exploration of the application of small molecule doping in the field of lithium-ion batteries.

杂原子掺杂一直是锂离子电池（LIBs）正极常用的改性方法。在材料中加入客体杂原子可以调节主体材料的微观结构，增大晶格间距或形成氧空位缺陷，可有效改善材料的电化学性能。在此，通过简单的一步水热法合成了CO ₂修饰的VO _{2 (B)纳米棒。}由于CO ₂小分子导致 VO ₂ (B) 中的扩展层间距，合成的 CO ₂ -VO ₂电极在 100 mA g ^-1时表现出 251.1 mA g ^{-1的高初始容量}，80次循环后容量保持率为81.8%。值得注意的是，CO ₂ -VO ₂电极还具有很高的倍率容量（170.0 mAh g ^-1 at 1 A g ^-1），即使在变电流条件下容量恢复率也能达到84.5%。进一步的研究表明，CO ₂小分子在 VO _{2 (B) 层间的支柱作用以及 O CO2}和 Li ⁺之间的弱静电引力存在，导致了坚固的晶体结构和方便的锂离子扩散条件VO ₂中锂离子的（脱）嵌入(二). 该研究为进一步探索小分子掺杂在锂离子电池领域的应用开辟了道路。