4.7 Article

A hybrid superconcentrated electrolyte enables 2.5 V carbon-based supercapacitors

Journal

CHEMICAL COMMUNICATIONS
Volume 56, Issue 57, Pages 7965-7968

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc02040k

Keywords

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Funding

  1. Shenzhen Science and Technology Research Grant [JCYJ20180504165506495, JCYJ20170818085823773]
  2. National Natural Science Foundation of China [21622407, 21875266]
  3. Strategic Priority Research Program of the Chinese Academy of Sciences [XDA21010214]

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A hybrid solvent in salt electrolyte was developed by hybridizing aqueous and organic solvents in concentrated lithium bis(fluorosulfonyl)imide (LiFSI) salts, such an electrolyte provides an unprecedented electrochemical window of 5.35 V, which is even comparable to traditional organic electrolytes, and enables a super-stable carbon-based symmetric supercapacitor with a long life of 10 000 cycles at an operating voltage of 2.5 V.

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