Journal
JOURNAL OF POWER SOURCES
Volume 482, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228970
Keywords
Waste residue; Recycling; Leaching; LiFePO4; Li4Ti5O12
Funding
- National Natural Science Foundation of China [51874079, 51674068]
- Natural Science Foundation of Hebei Province [E2018501091]
- Training Foundation for Scientific Research of Talents Project, Hebei Province [A2016005004]
- Fundamental Research Funds for the Central Universities [N172302001, N182312007, N182306001, N2023040]
- Hebei Province key research and development plan project [19211302D]
- Qinhuangdao City University student of Science and Technology Innovation and Entrepreneurship Project [PZB1810008T-46, PZB1810008T-14]
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A process for recycling steelmaking waste and preparing high value-added lithium-ion batteries (LIBs) electrode materials LiFePO4 and Li4Ti5O12 was proposed. The study showed improved purity and performance of the materials synthesized from the waste residue, providing a potential solution to environmental pollution and energy crisis.
A process for recycling steelmaking waste is proposed, and high value-added lithium-ion batteries (LIBs) electrode materials LiFePO4 and Li4Ti5O12 are prepared. The precursor material FePO4 center dot xH(2)O is prepared from the iron-rich filtrate formed after HCl leaching the waste residue. Using FePO4 center dot xH2O and Li2CO3 as raw materials by the carbothermal reduction method, LiFePO4 containing a small amount of metal doping is prepared. By comparing the XRD patterns, it is found that the purity of the synthesized LiFePO4 material is higher if the precursor whose Fe-P molar ratio is close to the theoretical value of 1 is used as the raw material. The initial discharge capacity of LiFePO4/C at 0.1C is 139.3 mAh.g(-1), and after 50 cycles, the capacity retention rate is 94.97%. In sulfuric acid medium, NH3 center dot H2O and H2O2 are used to selectively leaching Ti from the titanium-rich slag. High-purity TiO2 is prepared by calcining the peroxy titanium compound. The spinel-type lithium-ion battery anode material Li4Ti5O12 is prepared with TiO2 as the precursor. The initial discharge capacity of the battery assembled with Li4Ti5O12 at 0.1C is 163.3 mAh.g(-1). This study is helpful to solve the environmental pollution problem and the energy crisis.
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