Author ：Iflowpower – Portable Power Station Supplier
The battery industry has ushered in the power lithium battery "retire"! my country is currently the world's largest new energy vehicle market. With the gradual expiration of the battery life of electric vehicles, the amount of breath of the power lithium battery is also getting bigger. .
In 2014, my country's electric vehicle sales were 70,000; in 2015, it reached 300,000; in 2016, it reached 500,000; 2018, reached 10.53 million. In 2018, CATL and BYD's battery installed capacity were 23.
43 gWh and 11.43 gWh, respectively; in the first half of 2019, CATL and BYD battery installed volume were 13.85 gWh and 7.
36 g of. It is estimated that by 2020, my country's vehicle power lithium battery demand will reach 125GWH, and the waste of scrap will reach 32GWH. The scrap battery will reach about 500,000 t; to 2030, the power lithium battery scrap will reach 101GWH, scrap power The lithium battery is about 1.
16 million t. At present, there are two ways to recover the recycling of waste dynamic lithium-ion battery. First, the ladder is used, and the second is to dismantle the recycling.
Lithium-ion battery recycling company is important to recycle ternary positive material material. In addition, some small companies are mainly based on recovered lithium iron phosphate positive materials, but the technical level is low. The battery that can continue to be used below 50%, can only be dismantled, and resource recovery is utilized.
In addition, disassembly and resource utilization of scrap batteries are also required for scrap batteries of the ladder. About the positive electrode material accounts for a lithium-ion battery with a cost of 40%, in the recovery, focus on recovery and then use the positive material. Lithium-ion batteries can be divided into two varieties of lithium iron phosphate and ternary materials, and is important for bus and small cars due to safety and cycle.
Due to the large volume of volume, the ternary material battery is important for the coupe, the market in the two batteries is around 45%. Due to the growth of lithium iron phosphate development, the current amount of the silty phosphate ion battery is larger. In terms of resource recovery, domestic important professional recycling companies is important to recycle the positive material of the three-dimensional material.
The lithium iron phosphate contains 4% lithium, and the lithium carbonate is 1,70 kg, that is, 1T phosphate powder can be recovered 170 kg of carbonate, and therefore, the recovery of lithium iron phosphate plates, important recovery lithium and aluminum. At present, domestic recycling of lithium iron phosphate is some small companies. Due to technical reasons, the recovery rate of lithium in small companies is about 85%, and lithium carbonate can be recovered from about 140 kg.
In addition, the important component of lithium iron phosphate is iron phosphate, which has caused resource waste. At present, there is an important presence of ingredients in which lysophosphate positive electrode material recovery techniques are not recycled, and the acid-base consumption is large, high cost, and wastewater. If the waste lithium ion battery is not treated, it directly enters the smelting furnace melting into an alloy, and further dissolves the alloy, separating the high purity nickel and cobalt compound, and the harmful gas in the melting process will be subsequent purification.
Emissions, important use in the disposal of the lithium-hydride and waste cobalt acid lithium ion battery. The fire process is simple, easy to operate, and has a common effect on various waste batteries, but the processing process is long, and the comprehensive recovery rate of the price is low. At present, the domestic mainstream process route is a wet processing route, and it is important to recover the valbity metal in the positive electrode material of the waste lithium ion battery.
The wet process should be pretreated to the battery to obtain a waste battery positive electrode material powder, and a metal ion in the positive electrode of the inorganic acid is obtained, and the metal ion enters the solution, then by precipitation, extraction, salting, ion exchange, electrochemical, and the like. Further separation, the metal element compound such as cobalt, nickel, and lithium is purified. In the actual industrial production, the leaching process often uses hydrochloric acid, sulfuric acid and nitric acid to leach the positive electrode material, and add an oxidizing agent, and the hydrochloric acid is leached.
Sodium hydrochloride is used as an oxidant. At present, the battery company recycles the waste of the old lithium important use wet process, recovering the price of the ternary positive electrode material. my country's waste dynamic lithium-ion battery recycling is in the initial stage, and the industrial importance is mainly used in wet recovery positive electrode materials.
The backbone lithium-ion battery recycling company is mainly based on the recycling of three yuan positive material, and some small companies have carried out the production of lithium iron phosphate positive materials to recover industrial production, but only the lithium in the positive electrode material is low, the technical level is low, and the production cost is higher. Therefore, in order to ensure the overall recovery of the waste lithium ion battery, it is necessary to conduct research in terms of negative electrode, electrolyte, diaphragm, etc., and achieve industrialization.
Especially in dismantling, it is necessary to focus on the physical separation of the valuable lithium-ion battery price, reducing the recovery cost, ensuring sustainable development of the lithium-ion battery industry.
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