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| Effect of the preparation and morphology of ammonium jarosite on the properties of lithium iron phosphate anode materials for lithium ion batteries |
| Received:December 31, 2019 Revised:February 14, 2020 |
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| DOI： |
| KeyWord:laterite nickel ore; ammonium Jarosite; Lithium iron phosphate |
| Author | Institution |
| liangdong |
BOHAI University |
| Chang Longjiao |
BOHAI University |
| liujianan |
BOHAI University |
| zhaiyuchun |
Northeastern University |
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| Abstract: |
| To explore laterite nickel ore impurities Fe high value-added utilization of research, with laterite nickel ammonium sulfate roasting clinker dissolution liquid as the research object, the NH4HCO3 made alum used to preparation of yellow ammonium iron vitriol, alum hydrolysis of LiFePO4 raw materials for lithium ion batteries battery anode materials Fe2O3, adding Li2CO3 Fe2O3, ammonium dihydrogen phosphate NH4H2PO4 and lithium ion battery anode material sucrose calcined LiFePO4 / C. The best conditions were as follows: reaction time 4 h, reaction temperature 95℃, pH 2.5 at the end point, stirring speed 400 r/min, iron removal rate above 98.35%, and XRD, SEM and chemical analysis were used to characterize ammonium jarosite. The first discharge specific capacity of lithium iron phosphate flake was 164.12mah /g at the calcination temperature of 750℃ and the calcination time of 10h. The capacity retention rate of lithium iron phosphate flake for 10 weeks at the calcination rate of 0.1c, 0.5c, 1C, 2C and 5C was higher than that of lithium iron phosphate granular for 10 weeks, indicating that lithium iron phosphate flake had better electrochemical performance. The high value-added lithium ion battery LiFePO4 anode material is synthesized from iron in laterite nickel ore, which provides new technology and theoretical support for the efficient and comprehensive utilization of laterite nickel ore resources. |
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