A Molecular-Sieving Interphase Towards Low-Concentrated Aqueous Sodium-Ion Batteries  

作　　者：Tingting Liu Han Wu Hao Wang Yiran Jiao Xiaofan Du Jinzhi Wang Guangying Fu Yaojian Zhang Jingwen Zhao Guanglei Cui 

机构地区：[1]Qingdao Industrial Energy Storage Research Institute,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,People’s Republic of China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,People’s Republic of China [3]School of Chemical Engineering and Advanced Materials,The University of Adelaide,Adelaide,SA 5005,Australia [4]Shandong Energy Institute,Qingdao 266101,People’s Republic of China [5]Qingdao New Energy Shandong Laboratory,Qingdao 266101,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第8期51-63,共13页纳微快报（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2022YFB2402604);the National Natural Science Foundation of China(21975271,22209194);Shandong Natural Science Foundation(ZR2020ZD07,ZR2023YQ010 and ZR2021QB106);the Taishan Scholars of Shandong Province(No.ts201511063,tsqn202211277);the Shandong Energy Institute(SEI I202127);Qingdao New Energy Shandong Laboratory(QIBEBT/SEI/QNESLS202304).

摘　　要：Aqueous sodium-ion batteries are known for poor rechargeability because of the competitive water decomposition reactions and the high electrode solubility.Improvements have been reported by saltconcentrated and organic-hybridized electrolyte designs,however,at the expense of cost and safety.Here,we report the prolonged cycling of ASIBs in routine dilute electrolytes by employing artificial electrode coatings consisting of NaX zeolite and NaOH-neutralized perfluorinated sulfonic polymer.The as-formed composite interphase exhibits a molecularsieving effect jointly played by zeolite channels and size-shrunken ionic domains in the polymer matrix,which enables high rejection of hydrated Na^(+)ions while allowing fast dehydrated Na^(+)permeance.Applying this coating to electrode surfaces expands the electrochemical window of a practically feasible 2 mol kg^(-1) sodium trifluoromethanesulfonate aqueous electrolyte to 2.70 V and affords Na_(2)MnFe(CN)_(6)//NaTi_(2)(PO_(4))_(3) full cells with an unprecedented cycling stability of 94.9%capacity retention after 200 cycles at 1 C.Combined with emerging electrolyte modifications,this molecular-sieving interphase brings amplified benefits in long-term operation of ASIBs.

关 键 词：Molecular sieving effect Electrode coatings Aqueous sodium ion batteries Dilute aqueous electrolytes 

分 类 号：TM912[电气工程—电力电子与电力传动]