Preparation of lithium iron phosphate battery recycling environment function material progress

Source: 2020 - 04 - From 01 14:58 hits: lithium iron phosphate battery recycling and environmental preparation of functional materials made progress in recent years, along with the mobile Internet, energy storage, the rapid development of new energy electric vehicles and other technology, the demand of the lithium ion battery and output is growing rapidly. , according to the National Bureau of Statistics data from 2010 to 2017, the cumulative number of lithium ion battery reached 444 in China. Of 300 million pieces, including lithium iron phosphate batteries accounted, up from 69% in 2015 to a bigger share of the market. With the increase of charge-discharge cycles, lithium battery will eventually be abandoned, become a huge urban mines. It is estimated that by 2020, China will have 25 billion pieces of lithium battery is discarded, about 500000 tons. Many used in lithium batteries can not only alleviate strategic metals such as cobalt, lithium fast consumption, also can cause potential risk of environmental pollution. Lithium battery of lithium, nickel, cobalt and other precious metals recycling has been widely concerned. In order to improve the recovery of valuable metals and reduce the risk of solid waste management, people have developed a variety of skills. For large lithium iron phosphate batteries market share in China, the environment function material research institute, Chinese Academy of Sciences, institute of urban environment to develop a kind of method is the preparation of hydroxy iron phosphate lithium iron phosphate battery anode slice through the water waste heat recovery of lithium iron phosphate batteries. Completely discharge the lithium iron phosphate batteries, contains the positive plate of the lithium iron phosphate is removable. 180° C water treatment after 5 hours, the anode material and aluminum foil can be effectively separated. Through XRD hydrothermal products mainly low-value components into iron phosphate hydroxyl ( FPOH) 。 The functional materials can lead the water absorption of heavy metal ions, and can effectively catalytic hydrogen peroxide degradation of organic pollutants, such as dye methylene blue. According to the product after the adsorption kinetics, isotherms and adsorption characterization, FPOH of lead ion maximum adsorption capacity for 43. 203 mg/g, the resulting security product of hydroxyl dibasic lead accumulation. Quenching experiments speculate FPOH catalytic mechanism of hydrogen peroxide degradation of organic dye is fenton reaction generated hydroxyl free radicals are involved in the degradation reaction. This study for a higher proportion of our lithium ion battery of lithium iron phosphate battery waste recycling provides a method of waste disposal.