发现通过这种途径制备的磷酸钒钠晶像稳定，颗粒分散性高，无杂像，且二次合

It was found that the crystal image of sodium vanadium phosphate prepared by this method was stable, the particle dispersion was high, and there was no stray image, and the secondary synthesis did not change the valence state of V, under 0.1C, 0.5C, 1C, 2C, 4C, 6C After the test, the discharge capacity was again very close to the original discharge at a rate of 0.1C again; the charging and discharging voltage platform for the first cycle was stable at about 3.4V, and the first discharge capacity was significantly higher than the first-stage sample; at a rate of 1C The initial discharge capacity is 101.6mAh / g, the charge-discharge capacity after 100 cycles is 96.4mAh / g, and the capacity retention rate is 94.9%; the capacity retention rate after 100 cycles at 6C rate is 98.1%.

It was found that the image of sodium phosphate prepared by this method was stable, particle dispersion was high, no hybrid, and the secondary synthesis did not change the valence of V, and after testing under 0.1C, 0.5C, 1C, 2C, 4C, 6C, the discharge capacity was very close to the original discharge when re-adjusted at 0.1C multiplier; 3.4V, and the first discharge capacity is significantly higher than the first stage sample, the initial discharge capacity at 1C ratio is 101.6mAh/g, the charge and discharge capacity after 100 cycles is 96.4mAh/g, the capacity holding rate is 94.9%, and the capacity retention rate is 98.1% after 100 times at 6C.

It is found that the crystal image of sodium vanadate phosphate prepared by this way is stable, the particle dispersion is high, and there is no impurity image, and the secondary synthesis does not change the valence state of V 0.1C , 0.5C After testing at, 1C, 2C, 4C, 6C, switch back again 0.1C When discharging at multiple rate, the discharge capacity is very close to the original capacity; the first cycle charging and discharging voltage platform is stable at 3.4V About, and the first discharge capacity ratio of the first stage sample The initial discharge capacity at 1C is 101.6mAh/g The charge discharge capacity after 100 cycles is 96.4mAh/g , capacity retention rate is 94.9% The capacity retention rate after 100 cycles at 6C is 98.1% 。<br>