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Self‐Supported Tin Sulfide Porous Films for Flexible Aluminum‐Ion Batteries
Author(s) -
Liang Kun,
Ju Licheng,
Koul Supriya,
Kushima Akihiro,
Yang Yang
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201802543
Subject(s) - materials science , battery (electricity) , cathode , energy storage , electrochemistry , tin , electrode , porosity , nanotechnology , chemical engineering , composite material , electrical engineering , metallurgy , chemistry , engineering , power (physics) , physics , quantum mechanics
High‐performance flexible batteries are promising energy storage devices for portable and wearable electronics. Currently, the major obstacle to develop flexible batteries is the shortage of flexible electrodes with excellent electrochemical performance. Another challenge is the limited progress in the flexible batteries beyond Li‐ion because of a safety concern for the Li‐based electrochemical system. In this work, a self‐supported tin sulfide (SnS) porous film (PF) is fabricated as a flexible cathode material in an Al‐ion battery, which delivers a high specific capacity of 406 mAh g −1 . A capacity decay rate of 0.03% per cycle is achieved, indicating a good stability. The self‐supported and flexible SnS film also shows an outstanding electrochemical performance and stability during dynamic and static bending tests. In situ transmission electron microscopy demonstrates that the porous structure of SnS is beneficial for minimizing the volume expansion during charge/discharge. This leads to an improved structural stability and superior long‐term cyclability.