Introduction and synthesis of lithium iron phosphate

Introduction and synthesis of lithium iron phosphate

Lithium iron phosphate is a lithium-ion battery electrode material with the chemical formula LiFePO4 (LFP for short), which is mainly used in various lithium-ion batteries. It is characterized by large discharge capacity, low price, no toxicity, and no environmental pollution, but its low energy density affects the capacitance.

The synthetic method of lithium iron phosphate

The main production methods of lithium iron phosphate include high temperature solid phase synthesis method and liquid phase synthesis method. At this stage, the most commonly used method is high temperature solid phase synthesis method, and the product indicators are relatively stable.

1. Solid-phase synthesis

(1) High-temperature solid-phase reaction method: the most common and mature synthesis method at this stage. The nitrogen-protected push-plate furnace, mesh belt furnace, and rotary furnace are used for sintering.

(2) Carbothermal reduction (CTR): The synthesis method is simple, easy to operate, and the price of raw materials is low. It is suitable for large-scale production.

(3) Microwave synthesis method: the synthesis time is short, the energy consumption is low, and it is suitable for laboratory research.

(4) Mechanical alloying method

2. Liquid phase synthesis method: 

(1) liquid phase co-precipitation method,

(2) sol-gel method, 

(3) hydrothermal synthesis method

3. Other synthesis methods: spark plasma sintering technology, spray thermal decomposition technology and pulsed laser deposition technology are also used for the synthesis of lithium iron phosphate.

The performance of lithium-ion batteries mainly depends on the positive and negative electrode materials, and its safety performance and cycle life are unmatched by other materials, which are also the most important technical indicators of power batteries. 1C charge and discharge cycle life up to 2000 times. Single-cell battery overcharge voltage 30V will not burn, puncture will not explode. The lithium iron phosphate cathode material makes large-capacity lithium-ion batteries easier to use in series. In order to meet the needs of frequent charging and discharging of electric vehicles. It has the advantages of non-toxicity, non-polluting, good safety performance, wide source of raw materials, low price, long life, etc. It is an ideal cathode material for a new generation of lithium-ion batteries.

Follow us and explore more! 👉 Facebook