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Combining Nitrogen‐Doped Graphene Sheets and MoS 2 : A Unique Film–Foam–Film Structure for Enhanced Lithium Storage
Author(s) -
Shan TingTian,
Xin Sen,
You Ya,
Cong HuaiPing,
Yu ShuHong,
Manthiram Arumugam
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201606870
Subject(s) - graphene , materials science , molybdenum disulfide , anode , composite number , nanotechnology , lithium (medication) , graphene foam , energy storage , nanocomposite , chemical engineering , composite material , graphene oxide paper , electrode , chemistry , endocrinology , medicine , engineering , power (physics) , physics , quantum mechanics
With a notable advantage in terms of capacity, molybdenum disulfide has been considered a promising anode material for building high‐energy‐density lithium‐ion batteries. However, its intrinsically low electronic conductivity and unstable electrochemistry lead to poor cycling stability and inferior rate performance. We herein describe the scalable assembly of free‐standing MoS 2 –graphene composite films consisting of nitrogen‐doped graphene and ultrathin honeycomb‐like MoS 2 nanosheets. The composite has a unique film–foam–film hierarchical top‐down architecture from the macroscopic to the microscopic and the nanoscopic scale, which helps rendering the composite material highly compact and leads to rapid ionic/electronic access to the active material, while also accommodating the volume variation of the sulfide upon intercalation/deintercalation of Li. The unique structural merits of the composite lead to enhanced lithium storage.