skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on August 18, 2018

Title: Hybrid Ag 2VO 2PO 4/CF x as a High Capacity and Energy Cathode for Primary Batteries

In this report, we describe the electrochemistry of hybrid dual silver vanadium phosphorus oxide/carbon fluoride (Ag 2VO 2PO 4/CF x) cathodes with various weight ratios. Through modification of the Ag 2VO 2PO 4/CF x ratio, we can control the gravimetric and volumetric capacity, as well as mitigate the voltage drop during high current pulses. The increase in impedance caused by irreversible LiF formation in CFx was reduced by the silver reduction-displacement during electrochemical discharge of the Ag 2VO 2PO 4. Moreover, the addition of graphite was shown to reduce initial voltage delay. When Ag 2VO 2PO 4 dominates the electrode mass (i.e. 75/25 Ag 2VO 2PO 4/CF x) in the hybrid cathode, pulse testing shows less voltage drop and delay, but at the expense of capacity and energy density. As the amount of CFx in the composite increases (i.e. Ag 2VO 2PO 4/CF x ratio of to 50/50 or 25/75), charge capacity and energy density increases, but at the expense of larger voltage drops and delays early in the discharge process. Thus, controlling the Ag 2VO 2PO 4/CF x ratio can be used to tune the electrochemical properties of the dual cathode, allowing for optimization of capacity and power dependingmore » on the application.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [3]
  1. Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-203217-2018-JAAM
Journal ID: ISSN 0013-4651
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 164; Journal Issue: 12; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
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; electrochemistry; batteries; energy cathode; high capacity
OSTI Identifier:
1425074