Predicted Discharge Rate for gamma/beta-MnO2 versus lambda-MnO2

Abstract

Recently, lambda-MnO2 has been proposed as an alternative cathode to gamma/beta-MnO2 in Li/MnO2 primary batteries because of its potential faster discharge rate. The results presented here suggest that (1) switching from gamma/beta-MnO2 to lambda-MnO2 of equal particle size will lead to a maximum increase in the discharge rate at room temperature of about an order of magnitude and (2) when formed by acid digestion, gamma-MnO2 and beta-MnO2 have a higher lithium diffusivity and hence a faster discharge rate than when they are produced by the usual commercial means, a difference that may result from the lower structural water content in the materials produced by acid digestion.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2000
Accession Number
ADA374407

Entities

People

  • Jeff Wolfenstine

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Abstracts
  • Diffusion Coefficient
  • Diffusivity
  • Digestive System Processes
  • Equations
  • Experimental Data
  • Impurities
  • Information Operations
  • Low Temperature
  • Marine Corps
  • Materials
  • Military Research
  • Particle Size
  • Particles
  • Primary Batteries
  • Switching

Readers

  • Mathematics or Statistics
  • Molecular and Cellular Biochemistry
  • Plasma Physics.