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1NaSICON:A promising solid electrolyte for solid-state sodium batteries显示文摘A surge of interest has been brought to all-solid-state batteries(ASSBs)as they show great prospects for enabling higher energy density and improved safety compared to conventional liquid batteries.Na Super Ionic CONductors(NaSICONs)proposed by Goodenough and Hong in 1976 are the most promising materials class for Nabased ASSBs owing to their excellent ion conductivity(>1mS cm−1),high thermal and chemical/electrochemical stability,as well as good chemical/electrochemical compatibility with electrode materials.The major challenge facing NaSICONtype electrolytes is the generally high interfacial resistance and thus sluggish charge transfer kinetics across the NaSICON/cathode interface.Great endeavors in the past few years have led to progress in the improvement of the ion-conducting property,and a dramatic decrease in the NaSICON/electrode interface resistance.Excellent cycling performance and rate capability have been achieved through interface engineering.In this review article,we summarize the state-of-theart findings for various derivatives of NaSICON structured solid electrolytes,with the aim of providing a deeper understanding of the underlying mechanism for the improvement of ion conductivity,and the intrinsic reasons for the enhanced interface charge transfer kinetics.These strategies can be readily extended to other solid electrolytes.We hope this review will inspire more work on NaSICONtype solid electrolytes and solid-state batteries.Chi Li Rui Li Kaining Liu Rui Si Zhizhen Zhang Yong-Sheng Hu 2022Interdisciplinary Materials2022,1,3:1
2Bioinspired cellulose-integrated MXene-based hydrogels for multifunctional sensing and electromagnetic interference shielding显示文摘Bioinspired hydrogels are complex materials with distinctive properties comparable to biological tissues.Their exceptional sensitivity to various external stimuli leads to substantial application potential in wearable smart devices.However,these multifaceted hydrogels are often challenging to be combined with pattern customization,stimulus responsiveness,self-healing,and biocompatibility.Herein,inspired by mussel secretions,a printable,self-healing,and biocompatible MXene-based composite hydrogel was designed and prepared by incorporating Ti3C2Tx MXene nanosheets into the hydrogel framework through the chelation of calcium ions(Ca2+)with polyacrylic acid and cellulose nanofibers at alkaline conditions.The biocompatible conductive hydrogel exhibited sensitivity(gauge factor of 2.16),self-healing(within 1 s),recognition,and adhesion,distinguishing it as an ideal candidate for wearable multifunctional sensors toward strain sensing,vocal sensing,signature detection,and Morse code transmission.Additionally,the multifunctional hydrogel manifested efficient electromagnetic interference shielding properties(reaching more than 30 dB at a thickness of 2.0 mm),protecting electronics and humans from electromagnetic radiation and pollution.Therefore,the presented work represents a versatile strategy for developing environmentally friendly conductive hydrogels,demonstrating the perspectives of intelligent hydrogels for multifunctional applications.Jingjiang Wei Chenglong Zhu Zhihui Zeng Fei Pan Fuqiang Wan Liwen Lei Gustav Nyström Zhengyi Fu 2022Interdisciplinary Materials2022,1,4:0
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