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A Stable Cross‐Linked Binder Network for SnO 2 Anode with Enhanced Sodium‐Ion Storage Performance
Author(s) -
Wei Yanjie,
Wang Zhijie,
Ye Heng,
Mou Jian,
Lei Danni,
Liu Yong,
Lv Wei,
Li Baohua,
Kang Feiyu,
He YanBing
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702273
Subject(s) - anode , electrolyte , materials science , polyacrylic acid , chemical engineering , sodium ion battery , electrode , adhesive , battery (electricity) , lithium (medication) , ion , sodium , layer (electronics) , composite material , polymer , chemistry , metallurgy , organic chemistry , faraday efficiency , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
Stable binder network of anode is essential for the enhanced cycling performance of lithium ion battery electrode especially for SnO 2 anode, which has a big volume expansion/shrink during cycling. Here, we designed a cross‐linked polymer adhesive networks for SnO 2 anode of sodium‐ion battery by utilizing esterification reaction of PAA (Polyacrylic acid) and SS (soluble starch). The cross‐linked adhesive networks can effectively enhance the contact between conductive agent and SnO 2 particles, meanwhile serve as a buffer matrix of the expansion of SnO 2 during cycling and a protecting layer to reduce the contact of SnO 2 anode and electrolyte. As a result, a stable specific capacity of 370 mA h g −1 of the PAA‐SS@SnO 2 anode was obtained at a current density of 0.1 A g −1 after 150 cycles, while the specific capacity of PVDF@SnO 2 anode is only 200 mA h g −1 after 50 cycles. This cross‐linked adhesive networks present an effective and universal approach for application of pure SnO 2 as high performance anode of sodium ion batteries.