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Process for recycle of spent lithium iron phosphate battery via a selective leaching-precipitation method

Journal of Central South University 2020年第11期27卷 3239-3248页

作者： LI Hao-yu YE Hua SUN Ming-cang CHEN Wu-jie College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Applying spent lithium iron phosphate battery as raw material,valuable metals in spent lithium ion battery were effectively recovered through separation of active material,selective leaching,and stepwise chemical *** stoichiometric Na2S2O8 as an oxidant and adding low-concentration H2SO4 as a leaching agent was *** route was totally different from the conventional methods of dissolving all of the elements into solution by using excess mineral *** experiments were done under optimal conditions(Na2S2O8-to-Li molar ratio 0.45,0.30 mol/L H2SO4,60℃,1.5 h),leaching efficiencies of 97.53% for Li^+,1.39%for Fe^3+,and 2.58% for PO4^3−were ***4 was then recovered by a precipitation method from the leachate while maintaining the pH at *** mother liquor was concentrated and maintained at a temperature of approximately 100℃,and then a saturated sodium carbonate solution was added to precipitate *** lithium recovery yield was close to 80%.

关键词： lithium iron phosphate batteries selective leaching recovery sodium persulfate lithium carbonate

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Combination of lithium iron phosphate Battery and Super-Capacitor to Improve the Efficiency of Engine

Combination of Lithium Iron Phosphate Battery and Super-Capa...

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International Conference on Environment Science and Engineering（ICESE 2011）

作者： Ching Shang Cheng Graduate School of Engineering Technology LungHwa University of Science and Technology Guishan Tauyuan county Taiwan ( R.O.C.)

lithium iron phosphate is the recent high-profile of the lithium battery cathode material, as opposed to conventional lithium-cobalt batteries, the lithium-iron battery characteristics are long life, high safety, good heat level, and can withstand 3 5C, and even higher charge-discharge rate, while the use of lithium iron battery raw materials are not rare, you can significantly reduce costs. Super-capacitors have a stable voltage, stable and full-vehicle power systems, protection of vehicle electronics and extended battery life features. It need not destroy the car line. Do not change the original design, easy to install, direct bridging car battery so that the original battery into a high-power batteries, to enhance an instant high- power output, improving vehicle ignition effect, increase engine combustion efficiency and increased power. Reduce fuel consumption. Combination of lithium iron phosphate battery and super- capacitors as an energy saving device. Hope to use this energy- saving device to reduce engine fuel consumption, improve engine exhaust and reducing air pollution. Researchers found that if no energy-saving equipment installed, the engine exhaust components are still up to 2 *** hydrocarbons (such as benzene), 0.07 vol.% CO exist, but, if installation of energy-saving equipment, engine exhaust components in the composition of hydrocarbons and CO have been very few ingredients and no benzene was detected. Energy-saving device can increase the fuel efficiency of car engines. In the seven- seater 2500cc car were installed an energy-saving device. The increased fuel efficiency about 20% to 12%, when the installation of energy efficient device and speed is at 50km/hr to 90km/hr range.

关键词： lithium iron phosphate batteries super capacitors fuel efficiency

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