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Anion‐Sorbent Composite Separators for High‐Rate Lithium‐Ion Batteries
Author(s) -
Zhang Chen,
Shen Li,
Shen Jianqiang,
Liu Fang,
Chen Gen,
Tao Ran,
Ma Shengxiang,
Peng Yiting,
Lu Yunfeng
Publication year - 2019
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.201808338
Subject(s) - materials science , electrolyte , lithium (medication) , composite number , chemical engineering , electrode , conductivity , ion , electrospinning , sorbent , inorganic chemistry , adsorption , composite material , organic chemistry , chemistry , polymer , medicine , engineering , endocrinology
Novel composite separators containing metal–organic‐framework (MOF) particles and poly(vinyl alcohol) are fabricated by the electrospinning process. The MOF particles containing opened metal sites can spontaneously adsorb anions while allowing effective transport of lithium ions in the electrolyte, leading to dramatically improved lithium‐ion transference number t Li + (up to 0.79) and lithium‐ion conductivity. Meanwhile, the incorporation of the MOF particles alleviates the decomposition of the electrolyte, enhances the electrode reaction kinetics, and reduces the interface resistance between the electrolyte and the electrodes. Implementation of such composite separators in conventional lithium‐ion batteries leads to significantly improved rate capability and cycling durability, offering a new prospective toward high‐performance lithium‐ion batteries.