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Title: The Effect of Silver Ion Occupancy on Hollandite Lattice Structure

Journal Article · · MRS Advances
 [1];  [1];  [1];  [1];  [2];  [3];  [3];  [1]
  1. Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)

The effect of tunnel cations on tunnel size in α-MnO2structured (hollandite, cryptomelane) materials has long been of interest, as the tunnel size effects catalytic and transport properties. Previous research on the tunnel size has focused on potassium cryptomelane (KxMn8O16). This paper uses synthetic control of silver content in AgxMn8O16to investigate the effect that tunnel silver occupancy has on the lattice parameters. Materials with silver (x) content between 1.14 and 1.66 were synthesized, synchrotron diffraction and Rietveld Refinement was used to determine lattice parameters. The lattice parameters were found to contract as silver content increases (from 9.774 Å to 9.738 Å), in contrast to previous investigations of other tunnel cations.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0012673
OSTI ID:
1492772
Report Number(s):
BNL-210916-2019-JAAM; applab
Journal Information:
MRS Advances, Vol. 3, Issue 10; ISSN 2059-8521
Publisher:
Materials Research Society (MRS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Silver-Containing α-MnO 2  Nanorods: Electrochemistry in Rechargeable Aqueous Zn-MnO 2 Batteries journal January 2019
Capacity Retention for (De)lithiation of Silver Containing α-MnO 2 : Impact of Structural Distortion and Transition Metal Dissolution journal January 2018

Figures / Tables (4)