A Molecular-Sieving Interphase Towards Low-Concentrated Aqueous Sodium-Ion BatteriesOACSTPCDEI
A Molecular-Sieving Interphase Towards Low-Concentrated Aqueous Sodium-Ion Batteries
Aqueous sodium-ion batteries are known for poor recharge-ability because of the competitive water decomposition reactions and the high electrode solubility.Improvements have been reported by salt-concentrated 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 coat-ings consisting of NaX zeolite and NaOH-neutralized perfluorinated sul-fonic polymer.The as-formed composite interphase exhibits a molecular-sieving 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 Na2MnFe(CN)6//NaTi2(PO4)3 full cells with an unprecedented cycling stability of 94.9％ capacity retention after 200 cycles at 1 C.Combined with emerging electrolyte modifica-tions,this molecular-sieving interphase brings amplified benefits in long-term operation of ASIBs.
Tingting Liu;Guanglei Cui;Han Wu;Hao Wang;Yiran Jiao;Xiaofan Du;Jinzhi Wang;Guangying Fu;Yaojian Zhang;Jingwen Zhao
Qingdao Industrial Energy Storage Research Institute,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,People's Republic of China||Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,People's Republic of China||Shandong Energy Institute,Qingdao 266101,People's Republic of China||Qingdao New Energy Shandong Laboratory,Qingdao 266101,People's Republic of ChinaSchool of Chemical Engineering and Advanced Materials,The University of Adelaide,Adelaide,SA 5005,AustraliaQingdao Industrial Energy Storage Research Institute,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,People's Republic of China||Shandong Energy Institute,Qingdao 266101,People's Republic of China||Qingdao New Energy Shandong Laboratory,Qingdao 266101,People's Republic of China
Molecular sieving effectElectrode coatingsAqueous sodium ion batteriesDilute aqueous electrolytes
《纳微快报（英文）》 2024 (008)
51-63 / 13
This work was 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 Shan-dong Province(No.ts201511063,tsqn202211277),the Shandong Energy Institute(SEI I202127)and Qingdao New Energy Shan-dong Laboratory(QIBEBT/SEI/QNESLS202304).
评论