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High‐Performance Integrated Self‐Package Flexible Li–O 2 Battery Based on Stable Composite Anode and Flexible Gas Diffusion Layer
Author(s) -
Yang Xiaoyang,
Xu Jijing,
Bao Di,
Chang Zhiwen,
Liu Dapeng,
Zhang Yu,
Zhang XinBo
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201700378
Subject(s) - materials science , anode , battery (electricity) , cathode , energy storage , flexibility (engineering) , electrochemistry , composite number , nanotechnology , electrode , composite material , electrical engineering , power (physics) , chemistry , physics , statistics , mathematics , quantum mechanics , engineering
With the rising development of flexible and wearable electronics, corresponding flexible energy storage devices with high energy density are required to provide a sustainable energy supply. Theoretically, rechargeable flexible Li–O 2 batteries can provide high specific energy density; however, there are only a few reports on the construction of flexible Li–O 2 batteries. Conventional flexible Li–O 2 batteries possess a loose battery structure, which prevents flexibility and stability. The low mechanical strength of the gas diffusion layer and anode also lead to a flexible Li–O 2 battery with poor mechanical properties. All these attributes limit their practical applications. Herein, the authors develop an integrated flexible Li–O 2 battery based on a high‐fatigue‐resistance anode and a novel flexible stretchable gas diffusion layer. Owing to the synergistic effect of the stable electrocatalytic activity and hierarchical 3D interconnected network structure of the free‐standing cathode, the obtained flexible Li–O 2 batteries exhibit superior electrochemical performance, including a high specific capacity, an excellent rate capability, and exceptional cycle stability. Furthermore, benefitting from the above advantages, the as‐fabricated flexible batteries can realize excellent mechanical and electrochemical stability. Even after a thousand cycles of the bending process, the flexible Li–O 2 battery can still possess a stable open‐circuit voltage, a high specific capacity, and a durable cycle performance.