Re-synthesis of nano-structured LiFePO4/graphene composite derived from spent lithium-ion battery for booming electric vehicle application
| Autor: | Zaiping Guo, Wenjia Xu, Ruonan Yin, Yinglong Gao, Qinwen Zhou, Jianwen Liu, Shiquan Wang, Lei You, Wei Song |
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| Rok vydání: | 2019 |
| Předmět: |
business.product_category
Materials science Composite number Oxide Energy Engineering and Power Technology Nanotechnology 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Lithium-ion battery law.invention chemistry.chemical_compound law Electric vehicle Nano Electrical and Electronic Engineering Physical and Theoretical Chemistry Renewable Energy Sustainability and the Environment Graphene 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences chemistry 0210 nano-technology business |
| Zdroj: | Journal of Power Sources. 419:192-202 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2019.02.065 |
| Popis: | Currently extensive attentions on application of LiFePO4 batteries in electric vehicles are attracted to the researchers. Owing to the high cost of raw materials and burdensome preparation process, the re-synthesis of LiFePO4 from spent batteries becomes an economical and convenient way. Herein, a novel closed-loop regeneration process simultaneously from spent LiFePO4 cathode and graphite anode is proposed. Spent LiFePO4 cathode material is first successfully regenerated through Li+ compensation and structure reshaping via hydrothermal method, and then graphene oxide is recovered from spent graphite anode via Hummers method. The as-regenerated LiFePO4/reduced graphene oxide composites present spherical morphology, smaller and more uniform particles. The composite mode of LiFePO4 and graphene includes LiFePO4 distributing in the interlayer structure of graphene and the graphene evenly covering on the surface of the particles. The regenerated LiFePO4/reduced graphene oxide batteries exhibit reversible capacities of 162.6 mAhg−1 and high columbic efficiency, stable cycle performances at 0.2 and 1C and excellent rate capacity. Through comparison, the regenerated LiFePO4/reduced graphene oxide composites from hydrothermal process shows better prosperities than those of regenerated LiFePO4 from solid phase roasting method whatever electrochemical properties or economical efficiency in the booming electric vehicles and hybrid electric vehicles industrialization. |
| Databáze: | OpenAIRE |
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