title: Effectively suppressing dissolution of manganese from spinel lithium manganate via a nanoscale surface-doping approach.
abstract: The capacity fade of lithium manganate-based cells is associated with the dissolution of Mn from cathode/electrolyte interface due to the disproportionation reaction of Mn(III), and the subsequent deposition of Mn(II) on the anode. Suppressing the dissolution of Mn from the cathode is critical to reducing capacity fade of LiMn2O4-based cells. Here we report a nanoscale surface-doping approach that minimizes Mn dissolution from lithium manganate. This approach exploits advantages of both bulk doping and surface-coating methods by stabilizing surface crystal structure of lithium manganate through cationic doping while maintaining bulk lithium manganate structure, and protecting bulk lithium manganate from electrolyte corrosion while maintaining ion and charge transport channels on the surface through the electrochemically active doping layer. Consequently, the surface-doped lithium manganate demonstrates enhanced electrochemical performance. This study provides encouraging evidence that surface doping could be a promising alternative to improve the cycling performance of lithium-ion batteries.
authors.affiliation: Division of Chemical Sciences and Engineering, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.affiliation: 1] Division of Chemical Sciences and Engineering, Argonne National Laboratory, Argonne, Illinois 60439, USA [2] Department of Chemistry, Key Laboratory of Organic Optoelectronics and Molecular Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Zhan
authors.affiliation: Division of X-ray Science, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Tianpin
authors.initials: T
authors.lastname: Wu
authors.affiliation: Electron Microscopy Center, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Wen
authors.affiliation: Department of Chemical and Materials Engineering, University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
authors.forename: Yu
authors.initials: Y
authors.lastname: Lei
authors.affiliation: Division of Chemical Sciences and Engineering, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: A Jeremy
authors.initials: AJ
authors.lastname: Kropf
authors.affiliation: Division of Chemical Sciences and Engineering, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Huiming
authors.initials: H
authors.lastname: Wu
authors.affiliation: Electron Microscopy Center, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Dean J
authors.initials: DJ
authors.lastname: Miller
authors.affiliation: Division of Energy Systems, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Elam
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul 133-791, South Korea.
authors.forename: Yang-Kook
authors.initials: YK
authors.lastname: Sun
authors.affiliation: Department of Chemistry, Key Laboratory of Organic Optoelectronics and Molecular Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Xinping
authors.initials: X
authors.lastname: Qiu
authors.affiliation: Division of Chemical Sciences and Engineering, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Khalil
authors.initials: K
authors.lastname: Amine