4.6 Article

Upper-critical solution temperature (UCST) polymer functionalized graphene oxide as thermally responsive ion permeable membrane for energy storage devices

Journal

JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 43, Pages 18204-18207

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta04852k

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Funding

  1. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences through the Center for Electrical Energy Storage, an Energy Frontier Research Center [DE-AC02-06CH11357]
  2. MRSEC program at the Materials Research Center of the National Science Foundation [NSF DMR-1121262]
  3. Nanoscale Science and Engineering Center of the National Science Foundation [EEC-0118025/003]
  4. State of Illinois

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A thermally responsive membrane separator, suitable for use in nonaqueous electrolytes, was constructed by grafting a UCST polymer, poly(sulfobetaine), onto graphene oxide sheets. When heated from 20 to 80 degrees C, it decreased the specific storage capacity of the electrode for Li by >50% reversibly, compared to 30% increase without polymer modification.

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