Sub-nanoscale Engineering of MoO2 Clusters for Enhanced Sodium Storage

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外文摘要：Smart construction of battery-type anodes with high rate and good mechanical properties is significant for advanced sodium ion capacitors(SICs).Herein,a flexible film consisting of MoO2 subnanoclusters encapsulated in nitrogen-doped carbon nanofibers(MoO2 SCs@N-CNFs)is designed and synthesized via electrospinning toward SICs as anodes.The strong N-Mo interaction guarantees the stable yet uniform dispersion of high loading MoO2 SCs(≈40 wt.％)in the flexible carbonaceous substrate.The sub-nanoscale effect of SCs restrains electrode pulverization and improves the Na+diffusion kinetics,rendering better pseudocapacitance-dominated Na+-storage properties than the nanocrystal counterpart.The MoO2 SCs@N-CNFs paper with mass loadings of 2.2-10.1 mg cm-2 can be directly used as free-standing anode for SICs,which exhibit high reversible gravimetric/areal capacities both in liquid and quasi-solid-state electrolytes.The assembled flexible SICs competitively exhibit exceptional energy density and cycling stability.More significantly,the sub-nanoscale engineering strategy here is promisingly generalized to future electrode design for other electrochemical energy-related applications and beyond.

外文关键词：

flexible film electrodes,high areal mass loadinganodes,MoO2 subnanoclusters,sodium ion capacitors

作者：

Yang Liu、Shichao Wang、Xuan Sun、Jinyang Zhang、Fakhr uz Zaman、Linrui Hou、Changzhou Yuan

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作者单位：

School of Materials Science and Engineering,University of Jinan,Jinan 250022,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJinan Independent Innovative TeamTaishan ScholarsNatural Science Doctoral Foundation of Shandong ProvinceCollaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong

项目编号：

5177212751772131520721512020GXRC015ts201712050ZR2019BEM038

出版年：

2023

DOI：

10.1002/eem2.12263

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(1)

参考文献量60