47 12 Vol47No12 2017 12 JOURNALOFUNIVERSITYOFSCIENCEANDTECHNOLOGYOFCHINA Dec2017 :0253-2778(2017)12-0971-07 ( 230026) : (RGO)/MoS 2 89mg cm -2 1 mg cm -2 : ; ; :O64621;TM911 :A doi:103969/jissn0253-2778201712001 : [J] 201747(12):971-977 CHENG TaoWANG XinyuanWANG XiangyangetalLightweightandhighlystablegraphite paperasanodecurrentcolectorsforlithiumionbateries[j]journalof UniversityofScienceand TechnologyofChina201747(12):971-977 Lightweightandhighlystablegraphitepaperasanodecurrentcolectors forlithiumionbateries CHENG TaoWANG XinyuanWANG XiangyangZHU Yanwu (CAS Key Laboratoryof Materialsfor Energy ConversionDepartmentof MaterialsScienceand Engineering Universityof Scienceand Technologyof ChinaHefei230026China) Abstract:Graphitepaper (GP)withlow densityhighelectricalconductivityandthermaldifusivityis obtainedfromgraphiteoxidewhenusedascurrentcolectorsforanodesinli-ionbateries (LIBs)GP exhibitedbetercyclestabilitycomparedtocopperfoilsanode materialssuchascommercialgraphite RGO/MoS 2 hybrids has been directly cast onto GP by standard doctor-blade method and the electrochemicalperformanceisalmostthesameascucurrentcolectorsthearealweightofthecolector canbereducedtobelow1mg cm -2 byusinggpinsteadofcufoilsthusreducingtheusageofnon-active materialsinlibsandimprovingtheperformanceofthelibs Keywords:graphitepaper;lithiumionbatery;currentcolector;anode :2017-05-25; :2017-06-20 : (51322204) : 1991 : E-mail:chengt91@mailustceducn : / E-mail:zhuyanwu@ustceducn
972 47 cm 0-3 452Wh kg -1 30d 1% [1-3] 10%~13%; [68] [5] :1 Jiao [6] ( 80 10 10) (GP) Hu [7] 01A g -1 100 330mAh g -1 2 1 He [8] FeS 2 Li [9] 11 ( ~1000S/m) ; ( ); Li 4Ti 5O 12 LiFePO 4 ;RGO/MoS 2 - MoS 2 62% Ahn [10] ( ) [14] ; ( (CVD) ); (PVDFSigma-Aldrich);N- 50 ma g -1 (NMPSigma-Aldrich); ( 580mAh g -1 Kang [11] ); (Celgard2400Celgard) 2μm 8000S/m 12 (JSM-6700FJEOL); V 2O 5 (Labram-HRJYλ=532nm); (VAC); 3 (Princeton4000AMETEK); Chen [12] (CT2001A 3112S/cm 4 ); ( μm ) [13] 13 Wang Hummers [5] (PET) (GO)GO / 137 g GO (20mg/mL)
12 973 (polyethyleneterephthalatepet) 20 20cm 2 98% 60 GO GO 1000 GO 2800 2h 100μm 14 / RGO/MoS 2 / / PVDF(NMP ) 80 10 10 1 ( 1(c)) 1578cm -1 G 250μm 150μmRGO/MoS 2 / 2719cm -1 2D D RGO/MoS 2 PVDF (NMP ) 50 15 35 2D 110 12h 10mm 15 CR2032 10 mol/llipf 6 EC/DEC ( 1 1) 5 10-7 CT2001A 001~3V Princeton4000 (CV) 001~30V 02 mv s -1 Princeton4000 001Hz~100kHz 5mV 2 ( ) AB [13] 1(a) [12] 1(b) 65μm 022g/cm 3 D Bernal [15] (d) 5 cm (a) (b) SEM (c) (d) 1 Fig1 ThemorphologiesandstructureofGP 1 ( ) Tab1 ConductivitydensityandthermaldifusioncoeficientofGPwithdiferentthickneses(Cuasreference) /cm /cm / μ m /(S/m) /(g/cm 3 ) /(mm 2 /s) Cu 3642 1 10 242 10 7 89 115 GP-100 3254 1 100±6 534 10 4 022 9607 [13] GP-61 3608 1 61±2 105 10 5 032 GP-31 3568 1 31±2 138 10 5 063 GP-19 3342 1 19±2 20 10 5 103 01V IV (Princeton4000) -01~
974 47 1 GP-100GP-61GP-31 GP-19 RGO/MoS 2 ( 100μm) 61 31 19μm NMP 4~6μm ( (d)) 14 10 5 S/m [12] (100μm ) 1486 W/(m K) 9607mm 2 /s [13] 2(a) (b) RGO/MoS 2 SEM (a) (b)rgo/mos2 (c) / RGO/MoS 2 RGO/MoS2/ ( 10 mm) RGO MoS 2-2 [14] Fig2 Themorphologiesofelectrodematerials andwetabilityofslurryongp 2(c) (d)nmp (a)~(c) / / CV (d)~(f) / / 01A g -1 3 / / CV Fig3 CVandcharge/dischargecurvesofGPgraphite/GPgraphite/Cu 3(a)~(c) / 3(a) / CV 065V 0V (SEI) / / CV 016V [7] 3(d)~(f) Li + CV
12 975 4(a) 1A g -1 [16] 63% SEI 01mA [6] 01A g -1 cm -2 45mAh g -1 4 0014mAh (17 mg) (113 mah g -1 (372mAh g -1 ) 02mA cm -2 ) 22% 1A g -1 (a) 1A g -1 (b) / / 1A g -1 ( ~11mg cm -2 )(c) / / 01A g -1 14 EIS (d)rgo/mos2/ 2A g -1 ( 01A g -1 3 ) 4 Fig4 ElectrochemicalperformanceofGPcolector 4(b) 1 A g -1 Warburg / / 637 532 mah g -1 [17] 4(d) RGO/MoS 2 / 72% 81%( 3(e) (f)) 1A g -1 ( ~06mg cm -2 ) 2A g -1 400 228 mah g -1 1187 mah g -1 213mAh g -1 95% 68% [14] Li + [1819] Li + 01 A g -1 [16] 01A g -1 RGO/ 14 MoS 2 / ( ~075 mg cm -2 ) [14] 4(c) 850 865mAh g -1
976 47 1000 5 (a) 1(a) 5(f) 5(e) (A ) A 1~2μm [16] 5(b)~(f) / 01A g -1 16 5(b) (c) ( )10μm ( ) 056mg cm -2 89 mg cm -2 834mg cm -2 ( 1% 100μm 40μm) 10% B 5μm A 10μm (a) 1A g -1 1000 SEM (b) / SEM (c) / 01A g -1 16 SEM d) (e) / SEM (f) (e) SEM 3 5 Fig5 ThestabilityofGPcolectorduringthecharge/dischargeproces (Ⅲ) ;RGO/MoS 2 (References) [1]BRUCE P GSCROSATI B TARASCON J M Nanomaterialsforrechargeablelithium bateries[j] (Ⅰ) Angew ChemIntEd200847(16):2930-2946 [2]ARMAND M TARASCON J MBuilding beter bateries[j]nature2008451(7179):652-657 1mg cm -2 [3]LIU CGILLETTEEICHEN XetalAnal-in-one nanoporebateryarray[j]natnanotechnol20149 (Ⅱ) (12):1031-1039 RGO/MoS 2 [4]JOHNSON B A WHITER ECharacterization of commercialy available lithium-ion bateries[j] J
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