Synthetic Pathway Determines the Nonequilibrium Crystallography of Li- And Mn-Rich Layered Oxide Cathode Materials
Publication Name
ACS Applied Energy Materials
Abstract
Li- and Mn-rich layered oxides show significant promise as electrode materials for future Li-ion batteries. However, an accurate description of its crystallography remains elusive, with both single-phase solid solution and multiphase structures being proposed for high performing materials such as Li1.2Mn0.54Ni0.13Co0.13O2. Herein, we report the synthesis of single- and multiphase variants of this material through sol-gel and solid-state methods, respectively, and demonstrate that its crystallography is a direct consequence of the synthetic route and not necessarily an inherent property of the composition, as previously argued. This was accomplished via complementary techniques that probe the bulk and local structure followed by in situ methods to map the synthetic progression. As the electrochemical performance and anionic redox behavior are often rationalized on the basis of the presumed crystal structure, clarifying the structural ambiguities is an important step toward harnessing its potential as an electrode material.
Open Access Status
This publication may be available as open access
Volume
4
Issue
2
First Page
1924
Last Page
1935
Funding Sponsor
Stiftelsen för Strategisk Forskning