Invention Grant
US09199850B2 Method of fabricating LiFePO4 cathode electroactive material by recycling, and LiFePO4 cathode electroactive material, LiFePO4 cathode, and lithium secondary battery fabricated thereby
有权
通过再循环制造LiFePO4阴极电活性材料的方法，制备LiFePO4阴极电活性材料，LiFePO 4阴极和锂二次电池
- Patent Title: Method of fabricating LiFePO4 cathode electroactive material by recycling, and LiFePO4 cathode electroactive material, LiFePO4 cathode, and lithium secondary battery fabricated thereby
- Patent Title (中): 通过再循环制造LiFePO4阴极电活性材料的方法，制备LiFePO4阴极电活性材料，LiFePO 4阴极和锂二次电池
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Application No.: US13651765Application Date: 2012-10-15
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Publication No.: US09199850B2Publication Date: 2015-12-01
- Inventor: Hyung Sun Kim , Byung Won Cho , Hwa Young Lee , Su Jin Kim , Eun Jung Shin , Kyung Yoon Chung
- Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
- Applicant Address: KR Seoul
- Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
- Current Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
- Current Assignee Address: KR Seoul
- Agency: Ladas & Parry LLP
- Priority: KR10-2012-0056134 20120525
- Main IPC: C01B25/00
- IPC: C01B25/00 ; C01B25/37 ; C01B25/45 ; H01M4/1397 ; H01M4/58 ; H01B1/12 ; H01M4/02 ; H01M4/04 ; H01M4/62
Abstract:
The present invention relates to a method for fabricating a LiFePO4 cathode electroactive material for a lithium secondary battery by recycling, and a LiFePO4 cathode electroactive material for a lithium secondary battery, a LiFePO4 cathode, and a lithium secondary battery fabricated thereby. The present invention is characterized in that a cathode scrap is heat treated in air for a cathode electroactive material to be easily dissolved in an acidic solution, and amorphous FePO4 obtained as precipitate is heat treated in an atmosphere of air or hydrogen so as to fabricate crystalline FePO4 or Fe2P2O7. According to the present invention, a cathode scrap may be recycled by using a simple, environmentally friendly, and economical method. Further, a lithium secondary battery fabricated by using a LiFePO4 cathode electroactive material from the cathode scrap is not limited in terms of performance.
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