公开(公告)号：US20230406723A1

公开(公告)日：2023-12-21

申请号：US18247275

申请日：2021-09-16

Applicant: BASF SE

Inventor： Zhenji HAN ,  Jumpei NAKAYAMA ,  Junji KASHIWAGI ,  Hitoshi FUKUMITSU ,  Frank RAUSCHER ,  Christoph ERK ,  Thomas LETZELTER

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

CPC classification number: C01G53/50 ,  H01M4/505 ,  H01M4/525 ,  C01P2002/54 ,  C01P2006/40 ,  H01M2004/028

Abstract: Described herein is a process for manufacture of a cathode active material including the steps of



(a) providing a particulate electrode active material according to general formula Li1+xTM1−xO2, where TM is Ni and, optionally, at least one element selected from the group consisting of Al, Mg, Ba, and transition metals other than Ni, and x is in a range of from −0.05 to 0.2, and where at least 50 mole-% of TM is Ni,
(b) adding an aqueous medium that includes LiOH in dissolved form to the particulate electrode active material provided in step (a),
(c) removing the liquid phase by a solid-liquid separation method, and
(d) at least partially recycling the liquid phase from step (c) for use in a treatment step.

公开(公告)号：US20210376318A1

公开(公告)日：2021-12-02

申请号：US17254559

申请日：2019-06-17

Applicant: BASF SE

Inventor： Christoph ERK ,  Thomas LETZELTER ,  Markus HOELZLE ,  Carsten SUELING

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

Abstract: Process for modifying an electrode active material according to general formula Li1+xTM1−xO2, wherein TM contains a combination of Ni and at least one transition metal selected from Co and Mn, and, optionally, at least one metal selected from Al, Ba, and Mg and, optionally, one or more transition metals other than Ni, Co, and Mn, wherein at least 75 mole-% of TM is Ni, and x is in the range of from −0.05 to 0.2, said process comprising the steps of (a) treating said Li1+xTM1−xO2 with an aqueous medium with a pH value of at least 5 and up to 14, (b) removing said aqueous medium from treated Li1+xTM1−xO2 by way of a solid-liquid separation, wherein steps (a) and (b) are commenced with a maximum time difference of 3 minutes. In addition, the present invention is directed towards Ni-rich electrode active materials.