Abstract 3D flower-like Al-doped V6O13 and Al/Na co-doped V6O13 have been fabricated via a facile hydrothermal method using C2H2O4·2H2O, V2O5, Al(NO3)3·9H2O, and NaNO3 as raw materials. The microstructure of the samples was characterized by XRD, EDS, XPS, FESEM, and TEM. The results indicated that Al and Na ions co-doping improved the electrochemical performance of V6O13, including the specific discharge capacity and cycling stability. When the doped mole ratio of Al to V and Na to V were 0.033 and 0.020, respectively, the sample exhibited the best electrochemical performance with initial discharge specific capacity of 514 mAh/g. After 80 cycles, the capacity retention was 70.3%. The enhanced electrochemical performance originates from its superior structural reversibility, enhanced lithium diffusion coefficient and improved electrical conductivity.

中文翻译：

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高比容量Al/Na共掺杂V6O13锂离子电池正极材料的水热合成

摘要 以C2H2O4·2H2O、V2O5、Al(NO3)3·9H2O和NaNO3为原料，通过简便的水热法制备了3D花状Al掺杂V6O13和Al/Na共掺杂V6O13。通过XRD、EDS、XPS、FESEM和TEM对样品的微观结构进行表征。结果表明，Al和Na离子共掺杂提高了V6O13的电化学性能，包括比放电容量和循环稳定性。当Al与V和Na与V的掺杂摩尔比分别为0.033和0.020时，样品表现出最佳的电化学性能，初始放电比容量为514 mAh/g。80次循环后，容量保持率为70.3%。增强的电化学性能源于其优越的结构可逆性，