Silicon(Si)has been regarded as an alternative anode material to traditional graphite owing to its higher theoretical capacity(4200 vs.372 mAh g-1).However,Si anodes suffer from the inherent volume expansion and unstable solid electrolyte interphase,thus experiencing fast capacity decay,which hin-ders their commercial application.To address this,herein,an endotenon sheath-inspired water-soluble double-network binder(DNB)is presented for resolving the bottleneck of Si anodes.The as-developed binder shows excellent adhesion,high mechanical properties,and a considerable self-healing capability mainly benefited by its supramolecular hybrid network.Apart from these advantages,this binder also induces a Li3N/LiF-rich solid electrolyte interface layer,contributing to a superior cycle stability of Si electrodes.As expected,the DNB can achieve mechanically more stable Si electrodes than traditional polyacrylic acid and pec-tin binders.As a result,DNB delivers superior electrochemical performance of Si/Li half cells and LiNi0.8Co0.1Mn0.1O2/Si full cells,even with a high loading of Si electrode,to traditional polyacrylic acid and pectin binders.The bioinspired binder design provides a promising route to achieve long-life Si anode-assembled lithium batteries.

Meifang Jiang;Pengzhou Mu;Huanrui Zhang;Tiantian Dong;Ben Tang;Huayu Qiu;Zhou Chen;Guanglei Cui

Qingdao Industrial Energy Storage Research Institute,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,No.189 Songling Road,Qingdao 266101,People's Republic of China;Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education,College of Chemistry and Chemical Engineering,Ocean University of China,No.238 Songling Road,Qingdao 266100,People's Republic of China;University of Chinese Academy of Sciences,Beijing 100190,People's Republic of China

纳微快报（英文）

[1]Meifang Jiang;Pengzhou Mu;Huanrui Zhang;Tiantian Dong;Ben Tang;Huayu Qiu;Zhou Chen;Guanglei Cui-.An Endotenon Sheath-Inspired Double-Network Binder Enables Superior Cycling Performance of Silicon Electrodes)[J].纳微快报（英文）,2022(06):15-27

Endotenon,endotenon

An,Sheath,Inspired,Double,Network,Binder,Enables,Superior,Cycling,Performance,Silicon,Electrodes,been,regarded,alternative,material,traditional,graphite,owing,its,higher,theoretical,capacity,mAh,However,anodes,suffer,from,inherent,volume,expansion,unstable,solid,electrolyte,interphase,thus,experiencing,fast,decay,which,hin,their,commercial,application,To,address,this,herein,sheath,water,soluble,double,network,DNB,presented,resolving,bottleneck,developed,shows,excellent,adhesion,properties,considerable,self,healing,capability,mainly,benefited,by,supramolecular,hybrid,Apart,these,advantages,also,induces,Li3N,LiF,rich,interface,layer,contributing,superior,cycle,stability,electrodes,expected,can,achieve,mechanically,more,than,polyacrylic,acid,binders,result,delivers,electrochemical,performance,half,cells,LiNi0,8Co0,1Mn0,1O2,full,even,loading,pectin,bioinspired,design,provides,promising,route,long,life,assembled,lithium,batteries

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