Deconvolution of Composition and Crystallite Size of Silver Hollandite Nanorods: Influence on Electrochemistry
In this paper, silver hollandite (Ag 1.4Mn 8O 16) has been synthesized by an aqueous, low-temperature co-precipitation technique to afford silver hollandite with distinct crystallite sizes (10 and 15 nm, identified as S-Ag 1.4Mn 8O 16 and L-Ag 1.4Mn 8O 16, respectively) and equivalent silver content (x), allowing for the deconvolution of electrochemical effects related to crystallite size and silver content. The as-prepared silver hollandite materials were confirmed to be structurally analogous. Notably, TEM imaging reveals a high degree of bundling of S-Ag 1.4Mn 8O 16 nanorods compared to L-Ag 1.4Mn 8O 16 which facilitates more intimate connection of the S-Ag 1.4Mn 8O 16 material with enhanced interparticle contact. The electrochemical behavior and lithium diffusion properties were investigated by galvanostatic cycling, CV, electrochemical impedance, pulsed-discharge experiments, and ex-situ XAS analysis of cycled cathodes. Lithium based electrochemical cells containing S-Ag 1.4Mn 8O 16 delivered a capacity 15X higher than L-Ag 1.4Mn 8O 16 on cycle 1. Ex-situ XAS demonstrated structural change for S-Ag 1.4Mn 8O 16 and formation of Ag 0 on insertion of 3.8 Li + intercalation. However, the samples of L-Ag 1.4Mn 8O 16 were lithiated by a more limited 0.25 molar equivalents, where no significant structural changes weremore »
- Authors:
-
[1];
[1] ; [1]; [2]; [2]; [2]; [2]; [3]; [4]; [4]
- Stony Brook Univ., NY (United States). Dept. of Chemistry
- Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
- Stony Brook Univ., NY (United States). Dept. of Chemistry. Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
- Stony Brook Univ., NY (United States). Dept. of Chemistry. Dept. of Materials Science and Chemical Engineering
- Publication Date:
- Report Number(s):
- BNL-203324-2018-JAAM
Journal ID: ISSN 0013-4651
- Grant/Contract Number:
- SC0012704; SC0012673; AC02-06CH11357
- Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 164; Journal Issue: 14; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Research Org:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
- Sponsoring Org:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
- OSTI Identifier:
- 1425104