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MATERIALS AND METHODS Chemical delithiation of lithium iron phospate Commercial LiFePO4 (LFP, provided by Tatung, battery grade) was used for all the experiments. LiFePO4 was chemically delithiated using K2S2O8 (Sigma Aldrich, ACS grade, ≥ 99%) as an oxidizing agent following the methodology reported previously.30,39 Briefly, LiFePO4 (0.2 M) and K2S2O8 (0.1 M) were mixed in ultrapure water (18.2 M cm, Suez, Select). The reaction was held for 24 hours at room temperature under continuous stirring. The resultant solid was filtered, washed and dried overnight at 80 oC. These conditions led to the complete delithiation of LiFePO4 (LFP), obtaining FePO4 (FP) as the reaction product.30,39 Chemical lithiation of iron phospate Delithiated LiFePO4 (FePO4 or FP, obtained as described above) was chemically lithiated using Na2S2O3 (Na2S2O3·5H2O, Sigma Aldrich, ACS grade, ≥ 99.5 %) or Na2SO3 (Sigma Aldrich, ACS grade, ≥ 98%) as reducing agents and Li2SO4 (Li2SO4·H2O, Sigma Aldrich, ACS grade, ≥ 99 %) as the lithium source. In a typical experiment, a known amount of FePO4 (around 1 g), the reducing agent (Na2S2O3 or Na2SO3) and Li2SO4 were dissolved in 35 mL of ultrapure water under continuous stirring at room temperature. The initial molar concentrations of the reagents in the mixture were 0.375 M FePO4, 0.75 M Li2SO4 and 1.5 M Na2S2O3 or Na2SO3. Thus, the molar ratio of FePO4 : Li+ : reducing agent in the initial mixture was 1:4:4. The reaction was stopped after 20 min, 1 hour or 24 hours. The resultant solid was filtered, washed and dried overnight at 80 oC. The solid reaction product was characterized by XRD, galvanostatic cycling in Li-half cells, and ICP measurements of the digested solid. Chemical extraction of lithium from artificial brines Chemical extraction of lithium was also performed in two different artificial brines. The molar compositions are listed in Table 2. These experiments were carried out in the presence of 0.3 M Na2SO3. For brine 1, 0.03 M FePO4 was employed, and for brine 2, 0.1 M FePO4. 7PDF Image | Novel method of lithium production from brines
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Product and Development Focus for Infinity Turbine
ORC Waste Heat Turbine and ORC System Build Plans: All turbine plans are $10,000 each. This allows you to build a system and then consider licensing for production after you have completed and tested a unit.Redox Flow Battery Technology: With the advent of the new USA tax credits for producing and selling batteries ($35/kW) we are focussing on a simple flow battery using shipping containers as the modular electrolyte storage units with tax credits up to $140,000 per system. Our main focus is on the salt battery. This battery can be used for both thermal and electrical storage applications. We call it the Cogeneration Battery or Cogen Battery. One project is converting salt (brine) based water conditioners to simultaneously produce power. In addition, there are many opportunities to extract Lithium from brine (salt lakes, groundwater, and producer water).Salt water or brine are huge sources for lithium. Most of the worlds lithium is acquired from a brine source. It's even in seawater in a low concentration. Brine is also a byproduct of huge powerplants, which can now use that as an electrolyte and a huge flow battery (which allows storage at the source).We welcome any business and equipment inquiries, as well as licensing our turbines for manufacturing.CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)