Improved Na~+/K~+ Storage Properties of ReSe_2–Carbon Nanofibers Based on Graphene Modifications
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摘要
Rhenium diselenide(ReSe_2) has caused considerable concerns in the field of energy storage because the compound and its composites still suffer from low specific capacity and inferior cyclic stability.In this study,ReSe_2 nanoparticles encapsulated in carbon nanofibers were synthesized successfully with simple electrospinning and heat treatment.It was found that graphene modifications could affect considerably the microstructure and electrochemical properties of ReSe_2–carbon nanofibers.Accordingly,the modified compound maintained a capacity of 227 mAhg~(-1) after 500cycles at 200 mAg~(-1) for Na+storage,230 mAh g~(-1) after 200 cycles at 200 mAg~(-1),212 mAh g~(-1) after 150 cycles at 500 mAg~(-1) for K~+ storage,which corresponded to the capacity retention ratios of 89%,97%,and 86%,respectively.Even in Na+full cells,its capacity was maintained to 82% after 200 cycles at 1 C(117 mAg~(-1)).The superior stability of ReSe_2–carbon nanofibers benefitted from the extremely weak van der Waals interactions and large interlayer spacing of ReSe_2,in association with the role of graphene-modified carbon nanofibers,in terms of the shortening of electron/ion transport paths and the improvement of structural support.This study may provide a new route for a broadened range of applications of other rhenium-based compounds.
Rhenium diselenide(ReSe_2) has caused considerable concerns in the field of energy storage because the compound and its composites still suffer from low specific capacity and inferior cyclic stability.In this study,ReSe_2 nanoparticles encapsulated in carbon nanofibers were synthesized successfully with simple electrospinning and heat treatment.It was found that graphene modifications could affect considerably the microstructure and electrochemical properties of ReSe_2–carbon nanofibers.Accordingly,the modified compound maintained a capacity of 227 mAhg~(-1) after 500cycles at 200 mAg~(-1) for Na+storage,230 mAh g~(-1) after 200 cycles at 200 mAg~(-1),212 mAh g~(-1) after 150 cycles at 500 mAg~(-1) for K~+ storage,which corresponded to the capacity retention ratios of 89%,97%,and 86%,respectively.Even in Na+full cells,its capacity was maintained to 82% after 200 cycles at 1 C(117 mAg~(-1)).The superior stability of ReSe_2–carbon nanofibers benefitted from the extremely weak van der Waals interactions and large interlayer spacing of ReSe_2,in association with the role of graphene-modified carbon nanofibers,in terms of the shortening of electron/ion transport paths and the improvement of structural support.This study may provide a new route for a broadened range of applications of other rhenium-based compounds.
Rhenium diselenide(ReSe_2) has caused considerable concerns in the field of energy storage because the compound and its composites still suffer from low specific capacity and inferior cyclic stability.In this study,ReSe_2 nanoparticles encapsulated in carbon nanofibers were synthesized successfully with simple electrospinning and heat treatment.It was found that graphene modifications could affect considerably the microstructure and electrochemical properties of ReSe_2–carbon nanofibers.Accordingly,the modified compound maintained a capacity of 227 mAhg~(-1) after 500cycles at 200 mAg~(-1) for Na+storage,230 mAh g~(-1) after 200 cycles at 200 mAg~(-1),212 mAh g~(-1) after 150 cycles at 500 mAg~(-1) for K~+ storage,which corresponded to the capacity retention ratios of 89%,97%,and 86%,respectively.Even in Na+full cells,its capacity was maintained to 82% after 200 cycles at 1 C(117 mAg~(-1)).The superior stability of ReSe_2–carbon nanofibers benefitted from the extremely weak van der Waals interactions and large interlayer spacing of ReSe_2,in association with the role of graphene-modified carbon nanofibers,in terms of the shortening of electron/ion transport paths and the improvement of structural support.This study may provide a new route for a broadened range of applications of other rhenium-based compounds.
引文
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9.P.Senguttuvan,S.-D.Han,S.Kim,A.L.Lipson,S.Tepavcevic et al.,A high power rechargeable nonaqueous multivalent Zn/V2O5 battery.Adv.Energy Mater.6(24),1600826(2016).https://doi.org/10.1002/aenm.20160 0826
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12.S.W.Kim,D.H.Seo,X.Ma,G.Ceder,K.Kang,Electrode materials for rechargeable sodium-ion batteries:potential alternatives to current lithium-ion batteries.Adv.Energy Mater.2(7),710-721(2012).https://doi.org/10.1002/aenm.20120 0026
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14.W.Zhang,J.Mao,S.Li,Z.Chen,Z.Guo,Phosphorus-based alloy materials for advanced potassium-ion battery anode.J.Am.Chem.Soc.139(9),3316-3319(2017).https://doi.org/10.1021/jacs.6b121 85
15.N.Recham,G.l.Rousse,M.T.Sougrati,J.-Nl.Chotard,C.Frayret et al.,Preparation and characterization of a stable FeSO4F-based framework for alkali ion insertion electrodes.Chem.Mater.24(22),4363-4370(2012).https://doi.org/10.1021/cm302 428w
16.W.Wang,J.Zhou,Z.Wang,L.Zhao,P.Li,Y.Yang,C.Yang,H.Huang,S.Guo,Short-range order in mesoporous carbon boosts potassium-ion battery performance.Adv.Energy Mater.8(5),1701648(2018).https://doi.org/10.1002/aenm.201701648
17.Y.Marcus,Thermodynamic functions of transfer of single ions from water to nonaqueous and mixed solvents:part 3-standard potentials of selected electrodes.Pure Appl.Chem.57(8),1129-1132(1985).https://doi.org/10.1002/aenm.20170 1648
18.Z.Jian,Z.Xing,C.Bommier,Z.Li,X.Ji,Hard carbon microspheres:potassium-ion anode versus sodium-ion anode.Adv.Energy Mater.6(3),1501874(2016).https://doi.org/10.1002/aenm.20150 1874
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20.S.Zhang,B.V.R.Chowdari,Z.Wen,J.Jin,J.Yang,Constructing highly oriented configuration by few-layer MoS2:towards high-performance lithium-ion batteries and hydrogen evolution reactions.ACS Nano 9(12),12464-12472(2015).https://doi.org/10.1021/acsna no.5b058 91
21.Q.H.Wang,K.Kalantarzadeh,A.Kis,J.N.Coleman,M.S.Strano,Electronics and optoelectronics of two-dimensional transition metal dichalcogenides.Nat.Nanotech.7(11),699-712(2012).https://doi.org/10.1038/nnano.2012.193
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