Supporting Information.docx

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SupportingInformation

SupportingInformation

Nitrogen-dopedgraphenein-situmodifyingMnOnanoparticlesforhighlyimprovedlithiumstorage

Hua-WenHuanga†,Shan-ShanFana†,WendaDonga,WeiZoua,MinYana,ZhaoDenga,XianfengZhenga,JingLiua,Hong-EnWanga,LihuaChena,YuLi*a,bandBao-LianSua,c,d

aStateKeyLaboratoryofAdvancedTechnologyforMaterialsSynthesisandProcessing,WuhanUniversityofTechnology,122LuoshiRoad,430070Wuhan,Hubei,China.

bNRC（NanostructureResearchCentre）,WuhanUniversityofTechnology,122LuoshiRoad,430070Wuhan,Hubei,China.

cLaboratoryofInorganicMaterialsChemistry（CMI）,UniversityofNamur,61ruedeBruxelles,B-5000Namur,Belgium.

dClareHall,UniversityofCambridge,HerschelRoad,CambridgeCB39AL,UnitedKingdom.

†Theseauthorscontributedequallytothiswork.

*Correspondingauthor.E-mail:

yu.li@

SynthesisofGO

Typically,0.5gofgraphitepowder,20mLofconcentratedsulfuricacidand0.5gofsodiumnitratewereaddedintoacleanthree-neckedflaskaccordingly.Then,2.0gofpotassiumpermanganatewasaddedintothesolutionslowlyundericebathing（0to4°C）for10minutes.Afterwards,thetemperaturewasraisedto35°Candkeptfor2hours,and20mLdeionizedwaterwasaddedinthemixture.Thetemperaturewasfurtherraisedto90°Candmaintainedfor2hours.Finally,120mLdeionizedwaterwasaddedduringstirringafterremovingthethree-neckedflaskoutoftheoil-bathing.Whenthetemperaturedroppedto40~50°C,5mLof30%hydrogenperoxidesolutionwasaddedintothemixedsolution.Thesolutioniscentrifugedandwashedwith300mLdilutehydrochloricacidandthenwashedrepeatedlywithdeionizedwatertothefinalsupernatantatapHabout5~6.Theprecipitatewasdispersedinthewaterandayellow-blackGOsolutionwasobtained.TheconcentrationofGOwascalculatedbytaking10mLoftheaboveGOsolutiontofreezedry.

Fig.S1.（a）SEMimageofnitrogen-dopedgraphene,（b）AFMmorphologicalimageand（c）theorrespondingcross-sectionanalysisofGO.

Fig.S2.SEMimageofMnO/NG-IIat（a）lowmagnificationand（b）highmagnification.

Fig.S3.SEM-EDSmappingimagesofMnO/NG-I.

Fig.S4.SEM-EDSmappingimagesofMnO/C.

Fig.S5.XPSspectraofMnO/NG-IandMnO/Ccomposite:

（a）fullspectrumanalysisand（b）Mn2p.

Fig.S6.（a,b）CVcurves,（c）dischargeand（d）chargevoltageprofilesofMnOandMnO/C,respectively.

Fig.S7.EISofelectrodesaftershelvingfor8hoursbutbeforecyclingtestofMnO/NG-I,MnO/NG-II,MnO/CandMnO.

TableS1.CyclingperformancecomparisonoftheMnObasedanodesforLIBs

Materials

GrapheneorCcontent（wt%）

Firstcycle

（mAh/g）

Afteraging

（mAh/g）

Current

（mA/g）

Reference

MnOnanoparticles/NG

24.10

1495

1005（100th）

100

Thiswork

MnO/rGO

30.66

1129.8

665.5（50th）

100

[34]

MnOnanoparticles/rGO

15.02

~1220

772（90th）

100

[32]

MnO/rGO

38.65

1800

900（85th）

100

[24]

MnO/rGO

34

1607

847（150th）

100

[50]

MnO/C

25.07

1001

832（100th）

100

[15]

MnO@NC

25.7

1465.1

775.4（200th）

100

[43]

MnOnanospheres/C

17.47

1491.8

1096.6（100th）

100

[21]

MnO@NC

4.86

1490

578（60th）

100

[49]