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Title: High Energy Density CNT/NaI Composite Cathodes for Sodium-Ion Batteries

Journal Article · · Advanced Materials Interfaces
 [1];  [1];  [2];  [3];  [2];  [2]; ORCiD logo [1]
  1. Univ. of Illinois at Urbana-Champaign, IL (United States). Frederick Seitz Materials Research Lab., Beckman Inst.
  2. Univ. of Illinois at Urbana-Champaign, IL (United States). Frederick Seitz Materials Research Lab.
  3. Kangwon National Univ., Samcheok (South Korea)

The Na-iodine system has potential as a positive electrode in sodium-ion batteries due to its fast reaction kinetics and high energy density. Here, the fabrication of a NaI-loaded carbon nanotube (CNT) mat cathode is presented and the use of NaI as a Na-ion battery cathode is reported for the first time. Freestanding electrodes show a capacity retention of 92% after 100 cycles at 100 mA h g-1 and a high specific energy density (≈473 W h kg-1, second discharge basis vs Na metal) and small hysteresis (0.03 V). Adding a CNT mat interlayer between the NaI composite cathode and the separator, and fluoroethylene carbonate to the electrolyte significantly suppresses shuttling of active materials during cycling. Using ex situ X-ray photoelectron spectroscopy and Raman data, an understanding of the relevant processes occurring during cycling of the CNT/NaI cathode is developed.

Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Kwanjeong Educational Foundation
Grant/Contract Number:
FG02-07ER46471
OSTI ID:
1606382
Alternate ID(s):
OSTI ID: 1479522
Journal Information:
Advanced Materials Interfaces, Vol. 5, Issue 23; ISSN 2196-7350
Publisher:
Wiley-VCHCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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