公开(公告)号：WO2021242831A2

公开(公告)日：2021-12-02

申请号：PCT/US2021/034209

申请日：2021-05-26

Applicant: WORCESTER POLYTECHNIC INSTITUTE

Inventor： WANG, Yan ,  MA, Xiaotu ,  GRATZ, Eric ,  FU, Jinzhao ,  VANAPHUTI, Panawan

IPC: C01D15/00 ,  C30B1/02 ,  H01M10/052 ,  H01M10/54 ,  B22F8/00 ,  C30B29/16 ,  C30B1/04 ,  C30B1/12 ,  C30B29/22 ,  C30B29/52 ,  H01M2004/028 ,  H01M4/505 ,  H01M4/525

Abstract: A recycling and synthesis of charge material for secondary batteries generates single-crystal charge materials for producing batteries with greater charge cycle longevity. Charge material particles undergo a heating for fusing or enhancing grain boundaries between polycrystalline particles. The resulting, more well-defined grain boundaries are easily etched by a relatively weak mineral acid solution. The acid solution removes material at the grain boundaries to separate secondary particles into primary particles along the grain boundaries. The resulting single crystal (monocrystalline) charge material particles are washed and filtered, and typically re-sintered to accommodate any needed lithium (lithium carbonate), and result in a charge material with larger surface area, higher lithium diffusivity and lower cation ordering.

公开(公告)号：WO2023034556A1

公开(公告)日：2023-03-09

申请号：PCT/US2022/042434

申请日：2022-09-02

Applicant: WORCESTER POLYTECHNIC INSTITUTE

Inventor： WANG, Yan ,  MA, Xiaotu

IPC: C01G53/00 ,  H01M4/525 ,  H01M4/505 ,  H01M10/54

Abstract: A method for recycling secondary battery charge materials includes a one-step molten-salt process to upcycle mixed Ni-lean polycrystalline NMC cathodes into Ni-rich single-crystal NMC cathodes. The method includes receiving a recycling stream of charge materials from end-of-lifetime batteries, adding additional charge materials based on an upcycled battery chemistry intended for the upgraded, recycled battery, and sintering the combined charge materials for generating a single crystal charge material corresponding to the upcycled battery chemistry using a molten salt direct recycling process.

公开(公告)号：EP4396134A1

公开(公告)日：2024-07-10

申请号：EP22865595.7

申请日：2022-09-02

Applicant: Worcester Polytechnic Institute

Inventor： WANG, Yan ,  MA, Xiaotu

IPC: C01G53/00 ,  H01M4/525 ,  H01M4/505 ,  H01M10/54

CPC classification number: Y02W30/84 ,  H01M4/525 ,  H01M10/54 ,  C01G53/50 ,  C01P2002/7220130101 ,  C01P2002/7420130101 ,  H01M2004/02820130101

公开(公告)号：EP4157796A2

公开(公告)日：2023-04-05

申请号：EP21813618.2

申请日：2021-05-26

Applicant: Worcester Polytechnic Institute

Inventor： WANG, Yan ,  MA, Xiaotu ,  GRATZ, Eric ,  FU, Jinzhao ,  VANAPHUTI, Panawan

IPC: C01D15/00 ,  C30B1/02 ,  H01M10/052 ,  H01M10/54 ,  B22F8/00 ,  C30B29/16

公开(公告)号：EP4150697A1

公开(公告)日：2023-03-22

申请号：EP22788773.4

申请日：2022-04-12

Applicant: Worcester Polytechnic Institute

Inventor： WANG, Yan ,  HOU, Jiahui ,  MA, Xiaotu ,  FU, Jinzhao

IPC: H01M10/54 ,  C01D15/08 ,  C22B26/12 ,  C22B3/16