As a high-potential and high-stability cathode material, LiVPO₄F/C is modified by K⁺ and Zr⁴⁺ co-doping to significantly improve its high-rate and long-life performance. K⁺ assisted by Zr⁴⁺ slightly enlarges the unit cell volume to expand Li⁺ migration pathway. K⁺ substituting Li⁺ can also achieve pillar effect to increase the structural stability. Hall effect reveals that Zr⁴⁺ substituting V³⁺ is a donor doping, leading to the transformation of conductive type from p-type to n-type and a great increase of carrier density by 10⁶ times. Therefore, the electronic conductivity (1.1 × 10⁻² S cm⁻¹) increases by a factor of ∼10⁴. The charge transfer resistance decreases to 82.81 Ω and the Li⁺ diffusion coefficient (9.83 × 10⁻¹³ cm² s⁻¹) increases to 7 times that of undoped LiVPO₄F/C. The discharge capacities of Li_0.99K_0.01V_0.995Zr_0.005PO₄F/C at 0.1C and 1C are 143.3 mA h g^-1 and 135.5 mA h g^-1, respectively. The capacity retention at the charge/discharge rate of 10C is as high as 80.0% after 2000 cycles with an initial capacity of 108.1 mA h g^-1. Even at the discharge rate of 60C (charging at 1C), the capacity reaches 105.7 mA h g^-1.

LiVPO ₄ F / C作为一种高电势，高稳定性的阴极材料，通过K ⁺和Zr ⁴⁺共掺杂进行改性，以显着提高其高倍率和长寿命性能。借助Zr ⁴⁺辅助的K ⁺略微增大了晶胞体积，从而扩展了Li ⁺迁移途径。取代Li ^+的K ⁺还可达到立柱效应，从而增加结构稳定性。霍尔效应表明，取代V ^3+的Zr ⁴⁺是施主掺杂，导致导电类型从p型转变为n型，并且载流子密度大大提高了10 ^6。时代。因此，电子传导率（1.1×10 ^-2  S cm ^-1）增加了〜10 ⁴倍。电荷转移电阻降低到82.81Ω，Li ⁺扩散系数（9.83×10 ^-13  cm ²  s ^-1）增加到未掺杂LiVPO ₄ F / C的7倍。Li _0.99 K _0.01 V _0.995 Zr _0.005 PO ₄ F / C在0.1C和1C时的放电容量为143.3 mA h g ^-1和135.5 mA h g ^-1， 分别。2000次循环后，初始充电容量为108.1 mA h g ^-1，在10C充电/放电速率下的容量保持率高达80.0％。即使在60C的放电速率下（以1C充电），容量也达到105.7 mA h g ^-1。