Positive electrode active material, positive electrode, battery, and device
The invention provides a positive electrode active material, a positive electrode, a battery and a device, the positive electrode active material comprises first lithium manganese iron phosphate particles and second lithium manganese iron phosphate particles, the D50 particle size of the first lithi...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides a positive electrode active material, a positive electrode, a battery and a device, the positive electrode active material comprises first lithium manganese iron phosphate particles and second lithium manganese iron phosphate particles, the D50 particle size of the first lithium manganese iron phosphate particles is smaller than the D50 particle size of the second lithium manganese iron phosphate particles, the Mn/(Mn + Fe) molar ratio in the first lithium manganese iron phosphate particles is x, and the Mn/(Mn + Fe) molar ratio in the second lithium manganese iron phosphate particles is y, and x is greater than y. The positive electrode active material disclosed by the invention is formed by compounding two kinds of lithium manganese iron phosphate particles with different particle size ranges and different manganese contents, and the first lithium manganese iron phosphate particles with high manganese content and small particle size can bear instantaneous high-power output of the batt |
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