Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 28, Pages 8567-8571Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201804068
Keywords
azo compounds; carboxylate groups; electrochemistry; lithium batteries; sulfide electrolytes
Categories
Funding
- US National Science Foundation [1438198]
- Maryland NanoCenter and its AIMLab
- NSF
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1438198] Funding Source: National Science Foundation
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Organic electrode materials are promising for green and sustainable lithium-ion batteries. However, the high solubility of organic materials in the liquid electrolyte results in the shuttle reaction and fast capacity decay. Herein, azo compounds are firstly applied in all-solid-state lithium batteries (ASSLB) to suppress the dissolution challenge. Due to the high compatibility of azobenzene (AB) based compounds to Li3PS4 (LPS) solid electrolyte, the LPS solid electrolyte is used to prevent the dissolution and shuttle reaction of AB. To maintain the low interface resistance during the large volume change upon cycling, a carboxylate group is added into AB to provide 4-(phenylazo) benzoic acid lithium salt (PBALS), which could bond with LPS solid electrolyte via the ionic bonding between oxygen in PBALS and lithium ion in LPS. The ionic bonding between the active material and solid electrolyte stabilizes the contact interface and enables the stable cycle life of PBALS in ASSLB.
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