• Home
  • Search Results
  • Effectively suppressing dissolution of manganese from spinel lithium manganate via a nanoscale surface-doping approach.

Effectively suppressing dissolution of manganese from spinel lithium manganate via a nanoscale surface-doping approach.

Nature communications (2014-12-17)
Jun Lu, Chun Zhan, Tianpin Wu, Jianguo Wen, Yu Lei, A Jeremy Kropf, Huiming Wu, Dean J Miller, Jeffrey W Elam, Yang-Kook Sun, Xinping Qiu, Khalil Amine
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Titanium(IV) isopropoxide, 97%
Sigma-Aldrich
Titanium(IV) butoxide, reagent grade, 97%
Sigma-Aldrich
Manganese(IV) oxide, ReagentPlus®, ≥99%
Sigma-Aldrich
Titanium(IV) isopropoxide, 99.999% trace metals basis
Sigma-Aldrich
Manganese(IV) oxide, activated, ~85%, <10 μm
Sigma-Aldrich
Titanium(IV) isopropoxide, ≥97.0%
Sigma-Aldrich
Titanium(IV) butoxide, purum, ≥97.0% (gravimetric)
Sigma-Aldrich
Manganese(IV) oxide, 10 μm, reagent grade, ≥90%
Sigma-Aldrich
Titanium(IV) isopropoxide, packaged for use in deposition systems

Social Media

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon

MilliporeSigma

Research. Development. Production.

We are a leading supplier to the global Life Science industry with solutions and services for research, biotechnology development and production, and pharmaceutical drug therapy development and production.

© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.

Reproduction of any materials from the site is strictly forbidden without permission.