Microbial pyrazine diamine is a novel electrolyte additive that shields high-voltage LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathodes

The uncontrolled oxidative decomposition of electrolyte while operating at high potential (> 4.2 V vs Li/Li ) severely affects the performance of high-energy density transition metal oxide-based materials as cathodes in Li-ion batteries. To restrict this degradative response of electrolyte specie...

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Bibliographic Details
Published inScientific reports Vol. 12; no. 1; p. 19888
Main Authors Gupta, Agman, Badam, Rajashekar, Takamori, Noriyuki, Minakawa, Hajime, Masuo, Shunsuke, Takaya, Naoki, Matsumi, Noriyoshi
Format Journal Article
LanguageEnglish
Published England 25.11.2022
Subjects
Diamines
Electrodes
Ions
Lithium
Oxides
Pyrazines
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Summary:The uncontrolled oxidative decomposition of electrolyte while operating at high potential (> 4.2 V vs Li/Li ) severely affects the performance of high-energy density transition metal oxide-based materials as cathodes in Li-ion batteries. To restrict this degradative response of electrolyte species, the need for functional molecules as electrolyte additives that can restrict the electrolytic decomposition is imminent. In this regard, bio-derived molecules are cost-effective, environment friendly, and non-toxic alternatives to their synthetic counter parts. Here, we report the application of microbially synthesized 2,5-dimethyl-3,6-bis(4-aminobenzyl)pyrazine (DMBAP) as an electrolyte additive that stabilizes high-voltage (4.5 V vs Li/Li ) LiNi Mn Co O cathodes. The high-lying highest occupied molecular orbital of bio-additive (DMBAP) inspires its sacrificial in situ oxidative decomposition to form an organic passivation layer on the cathode surface. This restricts the excessive electrolyte decomposition to form a tailored cathode electrolyte interface to administer cyclic stability and enhance the capacity retention of the cathode.
ISSN:2045-2322