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Title: Effect of Multiple Cation Electrolyte Mixtures on Rechargeable Zn-MnO 2 Alkaline Battery

A Bi 2O 3 in β-MnO 2 composite cathode material has been synthesized using a simple hydrothermal method and cycled in a mixed KOH–LiOH electrolyte with a range of concentrations. We show that, at a KOH:LiOH molar ratio of 1:3, both proton insertion and lithium insertion occur, allowing access to a higher fraction of the theoretical capacity of the MnO 2 while preventing the formation of ZnMn 2O 4. This enables a capacity of 360 mAh/g for over 60 cycles, with cycling limited more by anode properties than traditional cathodic failure mechanisms. The structural changes occurring during cycling are characterized using electron microscopy and in situ synchrotron energy-dispersive X-ray diffraction (EDXRD) techniques. This mixed electrolyte shows exceptional cyclability and capacity and can be used as a drop-in replacement for current alkaline batteries, potentially drastically improving their cycle life and creating a wide range of new applications for this energy storage technology.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [2] ;  [4] ;  [5] ;  [4] ;  [2] ;  [1]
  1. Princeton Univ., NJ (United States)
  2. Univ. of California, San Diego, CA (United States)
  3. Stockholm Univ. (Sweden)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Rutgers Univ., Piscataway, NJ (United States)
Publication Date:
Report Number(s):
BNL-113338-2016-JA
Journal ID: ISSN 0897-4756
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 28; Journal Issue: 13; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE
OSTI Identifier:
1340424