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Li‐N 2 Batteries: A Reversible Energy Storage System?
Author(s) -
Zhang Zhang,
Wu Shuangshuang,
Yang Chao,
Zheng Lingyun,
Xu Dongli,
Zha Ruhua,
Tang Lin,
Cao Kangzhe,
Wang Xingai,
Zhou Zhen
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911338
Subject(s) - anode , materials science , energy storage , graphene , cathode , stripping (fiber) , chemical engineering , nanotechnology , electrode , chemistry , composite material , thermodynamics , power (physics) , physics , engineering
Tremendous energy consumption is required for traditional artificial N 2 fixation, leading to additional environmental pollution. Recently, new Li‐N 2 batteries have inextricably integrated energy storage with N 2 fixation. In this work, graphene is introduced into Li‐N 2 batteries and enhances the cycling stability. However, the instability and hygroscopicity of the discharge product Li 3 N 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‐N 2 batteries. In contrast, the modification with in situ generated Li 3 N and LiOH restrained the loss and volume change of Li metal anodes during stripping and plating, thereby promoting the rechargeability of the Li‐N 2 batteries. The mechanistic study here will assist in the design of more stable Li‐N 2 batteries and create more versatile methods for N 2 fixation.