An oxalate cathode for lithium ion batteries with combined cationic and polyanionic redox

The growing demand for advanced lithium-ion batteries calls for the continued development of high-performance positive electrode materials. Polyoxyanion compounds are receiving considerable interest as alternative cathodes to conventional oxides due to their advantages in cost, safety and environmen...

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Bibliographic Details
Published in:Nature communications 2019-08, Vol.10 (1), p.3483-9, Article 3483
Main Authors: Yao, Wenjiao, Armstrong, A. Robert, Zhou, Xiaolong, Sougrati, Moulay-Tahar, Kidkhunthod, Pinit, Tunmee, Sarayut, Sun, Chenghua, Sattayaporn, Suchinda, Lightfoot, Philip, Ji, Bifa, Jiang, Chunlei, Wu, Nanzhong, Tang, Yongbing, Cheng, Hui-Ming
Format: Article
Language:English
Subjects:
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Cathodes
Chemical Sciences
Electrode materials
Electrodes
Gas evolution
Humanities and Social Sciences
Iron
Lithium
Lithium-ion batteries
Material chemistry
multidisciplinary
Oxalic acid
Oxides
Rechargeable batteries
Redox reactions
Science
Science (multidisciplinary)
Transition metals
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Summary:The growing demand for advanced lithium-ion batteries calls for the continued development of high-performance positive electrode materials. Polyoxyanion compounds are receiving considerable interest as alternative cathodes to conventional oxides due to their advantages in cost, safety and environmental friendliness. However, polyanionic cathodes reported so far rely heavily upon transition-metal redox reactions for lithium transfer. Here we show a polyanionic insertion material, Li 2 Fe(C 2 O 4 ) 2 , in which in addition to iron redox activity, the oxalate group itself also shows redox behavior enabling reversible charge/discharge and high capacity without gas evolution. The current study gives oxalate a role as a family of cathode materials and suggests a direction for the identification and design of electrode materials with polyanionic frameworks. Polyoxyanion compounds are alternative cathodes to conventional oxides, but their reliance on the transition metal redox limits the performance. Here the authors report an oxalate system which possesses additional polyanionic redox reactivity, suggesting a new direction for cathode materials design.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-019-11077-0