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Title: High capacity vanadium oxide electrodes: effective recycling through thermal treatment

Journal Article · · Sustainable Energy & Fuels
DOI:https://doi.org/10.1039/C9SE00188C· OSTI ID:1570666
ORCiD logo [1];  [1]; ORCiD logo [2];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [3];  [4];  [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [6]
  1. Stony Brook Univ., NY (United States). Dept. of Chemistry
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  5. Stony Brook Univ., NY (United States). Dept. of Chemistry; Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering
  6. Stony Brook Univ., NY (United States). Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering

This study demonstrates that thermal regeneration is an effective approach to convert degraded phases to functioning electroactive materials, restore functional delivered capacity and recover material crystallinity while retaining the integrity of the parent electrode. V2O5 nanowires were synthesized through a facile hydrothermal method and used to fabricate V2O5/carbon nanotube (CNT) binder free electrodes. Discharge of the V2O5–CNT electrodes coupled with operando energy dispersive X-ray diffraction shows no evidence of phase segregation throughout the 150 μm thick binder free electrodes indicating full utilization of a thick electrode. When V2O5 is highly electrochemically lithiated (x > 2 in LixV2O5), irreversible phase transformation to ω-LixV2O5 was observed, accompanied by a capacity decrease of ~40% over 100 cycles. A simple thermal treatment of the entire electrode results in a delivered capacity equal to or higher than the original value. Both phase conversion and an increase in material crystallinity as a result of thermal treatment are observed where structural analysis indicates the formation of Li1V3O8. The electrode design approach with thick electrodes and functional thermal regeneration may provide a broader choice of electroactive materials through decreasing the environmental burden by extending the lifetime of energy storage systems.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2mt); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0012673
OSTI ID:
1570666
Alternate ID(s):
OSTI ID: 1529641
Report Number(s):
BNL-212185-2019-JAAM; SEFUA7
Journal Information:
Sustainable Energy & Fuels, Vol. 3, Issue 10; ISSN 2398-4902
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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Figures / Tables (11)


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