Structural and Electrochemical Aspects of LiNi 0.8 Co 0.1 Mn 0.1 O 2 Cathode Materials Doped by Various Cations

Tina Weigel, Florian Schipper, Evan M. Erickson, Francis Amalraj Susai, Boris Markovsky, Doron Aurbach

Research output: Contribution to journalArticlepeer-review

369 Scopus citations

Abstract

Ni-rich materials of layered structure LiNi x Co y Mn z O 2 , x > 0.5, are promising candidates as cathodes in high-energy-density Li-ion batteries for electric vehicles. The structural and cycling stability of Ni-rich cathodes can be remarkably improved by doping with a small amount of extrinsic multivalent cations. In this study, we examine development of a fast screening methodology for doping LiNi 0.8 Co 0.1 Mn 0.1 O 2 with cations Mg 2+ , Al 3+ , Si 4+ , Ti 4+ , Zr 4+ , and Ta 5+ by a "top-down" approach. The cathode material is coated by a precursor layer that contains the dopant, which then is introduced into the particles by diffusion during heat treatment at elevated temperatures. The methodology described herein can be applied to Ni-rich cathode materials and allows relatively easy and prompt identification of the most promising dopants. Then further optimization work can lead to development of high-capacity stable cathode materials. The present study marks Ta 5+ cations as very promising dopants for Ni-rich NCM cathodes.

Original languageEnglish
Pages (from-to)508-516
Number of pages9
JournalACS Energy Letters
Volume4
Issue number2
DOIs
StatePublished - 8 Feb 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

Funding

T.W. thanks Freiberger Compound Materials GmbH and Federmann Enterprises Ltd. for financial support with the Federmann-Scholarship. Partial support for the work discussed herein was provided by BASF, the Israeli Prime Minister's Office, and the Israeli Committee for Higher Education within the framework of the INREP project. T.W. thanks Freiberger Compound Materials GmbH and Federmann Enterprises Ltd. for financial support with the Federmann-Scholarship. Partial support for the work discussed herein was provided by BASF, the Israeli Prime Minister’s Office, and the Israeli Committee for Higher Education within the framework of the INREP project.

FundersFunder number
Federmann Enterprises Ltd.
Freiberger Compound Materials GmbH
Israeli Committee for Higher Education
Israeli Prime Minister’s Office
BASF
Office for Government Policy Coordination, Prime Minister's Secretariat

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