Reversible intercalation of lithium and sodium ions into layered and tunnel structured manganese oxides: one-dimensional versus two-dimensional diffusion

Bryan W. Byles; Ekaterina Pomerantseva

doi:10.1117/12.2274436

25 August 2017 Reversible intercalation of lithium and sodium ions into layered and tunnel structured manganese oxides: one-dimensional versus two-dimensional diffusion

Bryan W. Byles, Ekaterina Pomerantseva

Author Affiliations +

Proceedings Volume 10349, Low-Dimensional Materials and Devices 2017; 103490G (2017) https://doi.org/10.1117/12.2274436
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

Abstract

Two manganese oxides built from MnO₆ octahedra arranged in layered (Mg-BUS) and tunnel (Mg-TOD) crystal structures are tested for their performance in Li-ion and Na-ion batteries. The layered Mg-BUS consists of an open layered structure with 2D diffusion pathways for charge-carrying ions, while the Mg-TOD is built from structural tunnels (1D diffusion pathways) with the same height as the interlayer spacing in Mg-BUS. Benefiting from the similar chemical composition and crystal structure dimensions of these two materials, we study the role of diffusion channel geometry in reversible ion intercalation/deintercalation. It was found that in both Li-ion and Na-ion batteries, the two materials have similar initial capacities of ~120-130 mAh g^-1. The Mg-TOD demonstrated superior cycling stability in both battery systems, indicating the tunnel structure is advantageous for extended cycling. Rate performance experiments show that in Na-ion batteries, Mg-BUS maintains a higher capacity at higher current rates, suggesting the layered structure allows for more facile diffusion of the larger and heavier Na+ ions. Thus, these results indicate that the tunnel walls, while impeding ion diffusion for the larger Na⁺ ions, provide structural stability during electrochemical cycling, a finding which can help guide the design of electrode materials for intercalation-based batteries.

Citation Download Citation

Bryan W. Byles and Ekaterina Pomerantseva "Reversible intercalation of lithium and sodium ions into layered and tunnel structured manganese oxides: one-dimensional versus two-dimensional diffusion", Proc. SPIE 10349, Low-Dimensional Materials and Devices 2017, 103490G (25 August 2017); https://doi.org/10.1117/12.2274436

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available