Li‐N2 Batteries: A Reversible Energy Storage System?

Tremendous energy consumption is required for traditional artificial N2 fixation, leading to additional environmental pollution. Recently, new Li‐N2 batteries have inextricably integrated energy storage with N2 fixation. In this work, graphene is introduced into Li‐N2 batteries and enhances the cycl...

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Bibliographic Details
Published in:Angewandte Chemie 2019-12, Vol.131 (49), p.17946-17951
Main Authors: Zhang, Zhang, Wu, Shuangshuang, Yang, Chao, Zheng, Lingyun, Xu, Dongli, Zha, Ruhua, Tang, Lin, Cao, Kangzhe, Wang, Xin‐gai, Zhou, Zhen
Format: Article
Language:English
Subjects:
Batterien
Batteries
Bonding strength
Chemistry
Energiespeicherung
Energy consumption
Energy storage
Fixation
Graphen
Graphene
Hygroscopicity
Ionization
Nitrogenation
Oberflächenanalyse
Stickstoff-Fixierung
Storage batteries
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Summary:Tremendous energy consumption is required for traditional artificial N2 fixation, leading to additional environmental pollution. Recently, new Li‐N2 batteries have inextricably integrated energy storage with N2 fixation. In this work, graphene is introduced into Li‐N2 batteries and enhances the cycling stability. However, the instability and hygroscopicity of the discharge product Li3N lead to a rechargeable but irreversible system. Moreover, strong nonpolar N≡N covalent triple bonds with high ionization energies also cause low efficiency and irreversibility of Li‐N2 batteries. In contrast, the modification with in situ generated Li3N and LiOH restrained the loss and volume change of Li metal anodes during stripping and plating, thereby promoting the rechargeability of the Li‐N2 batteries. The mechanistic study here will assist in the design of more stable Li‐N2 batteries and create more versatile methods for N2 fixation. Graphen wurde in Li‐N2‐Batterien eingeführt, um die Stabilität des Reaktionszyklus zu untersuchen. Die Instabilität und Hygroskopie des Entladungsprodukts Li3N führen zur niedrigen Effizienz und Irreversibilität von Li‐N2‐Batterien. Außerdem verringert die durch in situ generiertes Li3N und LiOH modifizierte Li‐Anode den Verlust und die Volumenänderung von Li‐Anoden während des Strippings und Platings, was die Wiederaufladbarkeit von Li‐N2‐Batterien fördert.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201911338