Stable cycling of practical high-voltage LiCoO2 pouch cell via electrolyte modification
نویسندگان
چکیده
Nitriles as efficient electrolyte additives are widely used in high-voltage lithium-ion batteries. However, their working mechanisms still mysterious, especially practical LiCoO2 pouch Herein, we adopt a tridentate ligand-containing 1,3,6-hexanetricarbonitrile (HTCN) an effective additive to shed light on the mechanism of stabilizing cathode (4.5 V) through nitriles. The LiCoO2/graphite cells with HTCN possess superior cycling performance, 90% retention initial capacity after 800 cycles at 25 °C, and 72% 500 45 which is feasible for application. Such excellent performance can be attributed stable interface: molecules strong electron-donating ability participate construction cathode-electrolyte interphase (CEI) coordinating Co ions, suppresses decomposition improves structural stability during cycling. In summary, work recognizes coordinating-based interphase-forming strategy optimize high voltage appropriate
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15 صفحه اولEngineering the surface of LiCoO2 electrodes using atomic layer deposition for stable high-voltage lithium ion batteries
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ژورنال
عنوان ژورنال: Nano Research
سال: 2022
ISSN: ['1998-0000', '1998-0124']
DOI: https://doi.org/10.1007/s12274-022-4955-5