A kind of cathode material lithium ferrous phosphate for lithium ion battery and preparation method thereof
A lithium-ion battery and cathode material technology, which is applied in the field of lithium-ion battery cathode materials and their preparation, can solve the problems of complex process operation steps, irreversible capacity loss, environmental pollution, etc., achieve high production efficiency, and speed up lithium storage kinetics. , the effect of good crystal quality
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Embodiment 1
[0035] a kind of like figure 1 Lithium-ion battery cathode material LiFePO shown in the present invention 4 , the lithium-ion battery cathode material LiFePO 4 the D 50 At 1.91μm, specific surface area at 19.12m 2 / g, tap density 1.55g / cm 3 .
[0036] Lithium-ion battery cathode material LiFePO of the present embodiment 4 It is prepared by using ferrous oxalate as the iron source with a nano-ceramic grinding and dispersing machine, and specifically includes the following steps:
[0037] (1) Raw material preparation: prepare as raw materials ferrous oxalate (i.e. iron source), lithium hydroxide, phosphoric acid and compounds containing doped metal elements, the doped metal is Nb; the compound containing doped metal Nb elements refers to niobium oxalate; According to Li 0.95 Nb 0.01 FePO 4 The molecular formula is used for batching; considering the burning loss of the lithium source and the phosphorus source during the sintering process, a small amount of surplus is requi...
Embodiment 2
[0044] a kind of like figure 2 Lithium-ion battery cathode material LiFePO shown in the present invention 4 , the lithium-ion battery cathode material LiFePO 4 the D 50 At 0.92μm, specific surface area at 17.14m 2 / g, tap density 1.58g / cm 3 .
[0045] Lithium-ion battery cathode material LiFePO of the present embodiment 4 It is prepared by using ferrous oxalate as the iron source with a nano-ceramic grinding and dispersing machine, and specifically includes the following steps:
[0046] (1) Raw material preparation: Prepare as raw materials ferrous oxalate (i.e. iron source), lithium hydroxide, phosphoric acid and compounds containing doping metal elements. The doping metals are Nb, Mg, Ti, Mn and Zn; containing doping metals The compound of Nb element refers to niobium oxalate; the compound containing doped metal Mg element refers to basic magnesium carbonate; the compound containing doped metal Ti element refers to titanium dioxide; the compound containing doped metal...
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