A nitroaromatic cathode with an ultrahigh energy density based on six-electron reaction per nitro group for lithium batteries.
Proc Natl Acad Sci U S A
; 119(6)2022 02 08.
Article
em En
| MEDLINE
| ID: mdl-35101985
ABSTRACT
Organic electrode materials have emerged as promising alternatives to conventional inorganic materials because of their structural diversity and environmental friendliness feature. However, their low energy densities, limited by the single-electron reaction per active group, have plagued the practical applications. Here, we report a nitroaromatic cathode that performs a six-electron reaction per nitro group, drastically improving the specific capacity and energy density compared with the organic electrodes based on single-electron reactions. Based on such a reaction mechanism, the organic cathode of 1,5-dinitronaphthalene demonstrates an ultrahigh specific capacity of 1,338 mAhâ
g-1 and energy density of 3,273 Whâ
kg-1, which surpass all existing organic cathodes. The reaction path was verified as a conversion from nitro to amino groups. Our findings open up a pathway, in terms of battery chemistry, for ultrahigh-energy-density Li-organic batteries.
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MEDLINE
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En
Ano de publicação:
2022
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Article