News_News_Hunan Yide New Energy Technology Co.,Ltd.

09-22 

The University of Science and Technology of China has made a major breakthrough in the research of new lithium battery electrode materials

CCTV,Hefei,October9th(ReporterLiuJun)ThereporterlearnedfromtheUniversityofScienceandTechnologyofChinaonthe9ththattheresearchgroupofProfessorJiXingxingandcollaboratorsoftheschoolhasmadeamajorbreakthroughintheresearchofnewlithium-ionbatteryelectrodematerials:anewlydesignedblackPhosphorouscompositematerialsmakepossiblelithium-ionbatterieswithhighcapacity,fastcharging,andlonglife.Theresultswerepublishedinthe"Science"magazineonOctober9th,Beijingtime.Itisunderstoodthatelectricvehiclesarebecomingmoreandmorepopularinthemarket,butthelongchargingtimeisalsoprohibitive.Traditionalfuelvehiclescanextendarangeof500kilometerswithfullfuelinonlyfiveminutes,whileadvancedelectricvehiclescurrentlyonthemarketneedto"wait"foronehourtoachievethesamerangeextensioneffect.Thedevelopmentofhigh-capacitylithium-ionbatterieswithfastchargingcapabilitieshasalwaysbeenanimportantgoaloftheindustry.Theelectrodematerialisoneofthekeyfactorsthatdeterminethebatteryperformanceindex."Wehopetofindanelectrodematerialthatcannotonlygivetheindustryexpectationsintermsofcomprehensiveperformanceindicators,butalsoadapttotheindustrialbatteryproductionprocess."ProfessorJiHingxingsaid.Theauthorofthethesis,Dr.HongchangJin,introduced:“Energyentersandexitsthebatterythroughthechemicalreactionbetweenlithiumionsandelectrodematerials.Therefore,theconductivityoftheelectrodematerialtolithiumionsisthekeytodeterminingthechargingspeed;ontheotherhand,theelectrodematerialperunitmassorvolumecontainslithiumions.Theamountisalsoanimportantfactor."Accordingtotheintroduction,blackphosphorusisanallotropeofwhitephosphorus.Itsspeciallayeredstructuregivesitstrongionconductivityandhightheoreticalcapacity.Itisanelectrodematerialwithgreatpotentialtomeettherequirementsoffastcharging.However,blackphosphorusispronetostructuraldamagestartingfromtheedgeofthelayeredstructure,andthemeasuredperformanceisfarlowerthantheoreticalexpectations.JiHengxing'steamadoptedan"interfaceengineering"strategytoconnectblackphosphorusandgraphitethroughphosphorus-carboncovalentbonds,whichstabilizedthematerialstructurewhileimprovingtheconductivityoftheblackphosphorus-graphitecompositematerialtolithiumions.Buttheelectrodematerialwillbeenvelopedbychemicalsthatgraduallydecomposeintheelectrolyteduringtheworkingprocess.Somesubstanceswillpreventlithiumionsfromenteringtheelectrodematerial,justlikedustontheglasssurfacehinderslightpenetration.Theresearchteamusedathinpolymergeltomakeadust-proofcoatand"wore"onthesurfaceoftheblackphosphorousgraphitecompositematerialtoallowlithiumionstoentersmoothly."Weusetheconventionalprocessrouteandtechnicalparameterstomaketheblackphosphorouscompositematerialintotheelectrodesheet.Laboratorymeasurementresultsshowthattheelectrodesheetcanrecoverabout80%oftheelectricityafter9minutesofcharging,anditcanstillmaintain90%after2000cycles.Theco-author,XinSenfromtheInstituteofChemistryoftheChineseAcademyofSciencessaid,“Ifmassproductionofthismaterialcanbeachieved,matchingcathodematerialsandotherauxiliarymaterialscanbefound,andthecellstructure,thermalmanagementandOptimizingthedesignoflithiumprotection,etc.,willhopefullyobtainalithium-ionbatterywithanenergydensityof350Wh/kgandafastchargingcapability."Itisreportedthatalithium-ionbatterywithanenergydensityof350watt-hours/kgcanmakethedrivingrangeofanelectriccarcloseto1,000kilometers,whiletheTeslaModelShasadrivingrangeof650kilometersafterbeingfullycharged.Thefastchargingcapabilitywillincreasetheuserexperienceofelectricvehiclestoahigherlevel.

09-22 

Talking about the anode material of lithium battery

1.Definition:Thenegativeelectrodematerialisthecarrieroflithiumionsandelectronsinthebatterychargingprocess,andplaystheroleofenergystorageandrelease.Inthecostofthebattery,thenegativeelectrodematerialaccountsforabout5%-15%,anditisoneoftheimportantrawmaterialsforlithium-ionbatteries.2.Asacarrierforlithiumioninsertion,theanodematerialmustmeetthefollowingrequirements:Theinsertionredoxpotentialoflithiumionsinthenegativeelectrodematrixisaslowaspossible,closetothepotentialofmetallithium,sothattheinputvoltageofthebatteryishigh;``Alargeamountoflithiuminthematrixcanbereversiblyinsertedanddeintercalatedtoobtainhighcapacity;Duringtheinsertion/de-embeddingprocess,themainstructureofthenegativeelectrodehaslittleornochange;TheredoxpotentialchangeswiththeinsertionandremovalofLishouldbeaslittleaspossible,sothatthevoltageofthebatterywillnotchangesignificantly,andstablecharginganddischargingcanbemaintained;Theinsertioncompoundshouldhavegoodelectronicconductivityandionicconductivity,sothatpolarizationcanbereducedandhighcurrentchargeanddischargecanbecarriedout;ThehostmaterialhasagoodsurfacestructureandcanformagoodSEIwiththeliquidelectrolyte;Theintercalationcompoundhasgoodchemicalstabilityintheentirevoltagerange,anddoesnotreactwithelectrolytesetc.aftertheformationofSEI;Lithiumionshavealargediffusioncoefficientinthemainmaterial,whichisconvenientforrapidcharginganddischarging;Fromapracticalpointofview,thematerialshouldbeeconomicalandenvironmentallyfriendly.Three,carbon-basedanode:Fourth,silicon-basedanodematerialsaremainlydividedintotwocategories:1,crystallinesiliconmaterial;advantage:highcapacity,(4200mAh/g(Li4.4Si)),Disadvantages:Thevolumeexpansioncanreach300%,whichwillnotonlycausetheparticlesoftheSianodetobreak,butalsodamagetheconductivenetworkandbindernetworkoftheelectrode,resultinginthelossofactivematerials,whichwillseriouslyaffectthecycleperformanceofthesiliconanodematerial.TherearethreemainideasforsolvingtheproblemoflargevolumeexpansionofSimaterials:1)Nanometerization:Nanoparticlescanreducethedamageofthematerialparticlesandelectrodescausedbyvolumeexpansion,buttheyarelargerthanthetableandaffectthefirsteffect;andthemethodhasahighcost,acomplicatedprocess,andadifficultpreparation.2)Sicrystalmaterialswithspecialshapes,suchashoneycombmaterialsanddendriticSimaterials,usethedeformationoftheSimaterialitselftoabsorbthevolumechangeduringcharginganddischargingandimprovethecycleperformanceoftheSimaterial;butthecompactiondensityissmall,andtheprocessTheprocessiscomplicatedandthepreparationisdifficult.3)Si/Ccompositematerial,throughthecombinationofSiandgraphitematerial,thegraphitematerialisusedtobufferthevolumechangeoftheSimaterialduringthecycle,soastoimprovethecycleperformanceoftheSimaterial.Althoughtheexpansionspaceisreservedandthecycleperformanceisimproved,thecompactiondensityissmallandtheindustrializationisdifficult.Atpresent,scholarsatCentralSouthUniversityhavepreparedacompositeSianodematerialofsilicon,graphite,carbonnanotubesandpitchbyspraydrying.2,siliconoxidematerialSiliconoxide:Thevolumeexpansionissmall,butthefirsteffectistoolow.ThevolumeexpansionofSiOxmaterialismuchsmallerthanthatofcrystallinesiliconmaterial,butitsexpansionlevelisstillmuchhigherthanthatofgraphitematerials.Therefore,thedevelopmentofSiOxmaterialstillneedstofocusonthevolumeexpansionproblemtoreducethematerialparticlecrushingandpulverizationduringthecycle.,Improvethecyclelifeofthematerial.Therefore,nanoizationisalsoacommonmethodforSiOxmaterials;thereisalsotheuseofhigh-energyballmillingtotreatSiOxmaterials,reducingtheparticlesizeofSiOxmaterials,therebyimprovingthecycleandrateperformanceofthematerial,butthefirstefficiencyofthematerialisonly63%.InordertosubstantiallyimprovetheefficiencyofSiOxmaterialsforthefirsttime,KAISTdevelopedaSi-SiOx-Ccompositestructuresiliconanodematerial.NanoSiparticlesaredispersedinSiOxparticles,andthesurfaceoftheparticlesiscoveredwithalayerofporousCarbonmaterial.Electrochemicaltestsshowthatthematerialhasexcellentelectrochemicalperformance,withareversiblecapacityof1561.9mAh/gat0.06C,afirstefficiencyof80.2%,100cyclesof1C,andacapacityretentionrateof87.9%.5.LithiummetalanodematerialMetallithiumisoneofthemetalswiththelowestdensity.Thestandardelectrodepotentialis-3.04Vandthetheoreticalspecificcapacityis3860mAh/g.Fromthisdata,itissecondonlyto4200mAh/gofsilicon.Applicationareas:Lithium-sulfurbattery(2600wh/kg),lithium-airbattery(11680wh/kg),etc.Lithiummetalbatterieshavehighcapacityperformance,butinuse,duetothepresenceoflithiumdendrites,negativeelectrodeprecipitation,negativenegativesidereactions,whichseriouslyaffectthesafetyofthebattery,itisintheconceptualstageatthisstage.Lithium-sulfurbattery.Sulfurisalsoaverywidespreadelementinnature.Thehigherenergydensity(2600wh/kg)oflithium-sulfurbatteriesmaybethefocusofthenextgenerationoflithiumbatteryresearchanddevelopment.Lithium-airbattery.Lithium-airbatteryhasaveryhighenergydensity(11680wh/kg),whichisclosetotheenergydensityoffuel,andisenvironmentallyfriendly.Thereactionproductiswater.VI.Lithiumtitanateanodemater

09-22 

What is lithium hydroxide? Introduction to the characteristics and uses of lithium hydroxide

Lithiumhydroxideisasmallwhitemonocliniccrystal.Lithiumhydroxidehasaspicytasteandstrongalkalinity.Lithiumhydroxideisplacedintheair,itwillabsorbcarbondioxideandmoisture.Itisachemicalsubstancesolubleinwater.Lithiumhydroxideisslightlysolubleinethanolandinsolubleinether.Itisacorrosivesubstance.ThecharacteristicsoflithiumhydroxideLithiumhydroxideisaninorganicsubstancewiththechemicalformulaLiOHandtheEnglishnameLithiumhydroxide.Itisasmallwhitemonocliniccrystalwithaspicytaste,strongalkalinityandcorrosiveness.ThepHofa1mol/Lsolutionisabout14,pKb=-0.04.Itcanabsorbcarbondioxideandmoistureintheair,solubleinwater,slightlysolubleinethanol,andinsolubleinether.Therelativedensityis1.45,themeltingpointis471°C(anhydrous),anditdecomposesat925°C.AvailableinanhydrousandmonohydrateformsUseoflithiumhydroxideLithiumhydroxideisanimportantbasiclithiumsaltproduct.Lithium-basedgreasepreparedfromlithiumhydroxidehastheadvantagesoflongservicelife,oxidationresistance,andhightemperaturestability;lithiumhydroxidecanbeusedasadevelopingagentforspectralanalysis,Lubricant,asanadditiveforalkalinestoragebatteries,lithiumhydroxidecanincreasethestoragecapacityandprolongtheservicelifeofthebattery.Inaddition,lithiumhydroxidehasimportantapplicationsinmetallurgy,atomicenergy,chemicalreagents,aerospace,defenseindustryandotherfields.Itcanbeusedasanabsorbentforcarbondioxideandcanpurifytheairinthesubmarine.Usedtomakelithiumsaltandlithium-basedgrease,electrolyteforalkalinestoragebatteries,lithiumbromiderefrigeratorabsorbingliquid,lithiumsoap(lithiumsoap),lithiumsalt,developer,etc.orasanalyticalreagents;petroleum,chemical,lightindustry,Usedinthenuclearindustry.Whenusedinalkalinestoragebatteries,thealuminumcontentisnotmorethan0.06%,andtheleadcontentisnotmorethan0.01%.Usedasananalyticalreagent,photographicdeveloper,andalsousedinthemanufactureoflithium;itistobeusedasarawmaterialforthepreparationoflithiumcompounds.Itcanalsobeusedinmetallurgy,petroleum,glass,ceramicsandotherindustries.

09-22 

Analysis of the market status and development prospects of the lithium battery anode material industry: natural graphite vs. artificial graphite, who has more potential?

The core data of this article: natural graphite and artificial graphite shipments, lithium battery anode material market structure, natural graphite and artificial graphite prices, artificial graphite competition pattern, artificial graphite cost structure

09-22 

Tilted graphene structure may promote the development of quantum computing

Grapheneisamaterialwithextremelylowresistivity.Electronscanefficientlymigrateinthematerial,whichismuchhigherthantherateofelectronsintraditionalsemiconductorsandconductorssuchassiliconandcopper.Thismakesgrapheneveryconductive.Sincegraphenewasdiscoveredin2004,scientistshavebeenlookingforwaystoputthis2Dmaterialintouse.Becauseofitsatomicallythinstructure,coupledwithstrongelectronsandthermalconductivity,ithasshowngreatpotentialinthedevelopmentofelectronicandstoragedevices.Recently,researchersfromBrookhavenNationalLaboratory,Pennsylvaniaandotheruniversitieshavediscoveredthemovementmechanismofelectronsintwodifferentconfigurationsofdouble-layergraphene(carbonintheformofatomicthickness).Inthefuture,itmayprovidenewideasforthedevelopmentofamorepowerfulandsaferquantumcomputingplatform.Normally,computerchipsarebasedonanunderstandingofhowelectronsmoveinsemiconductors,especiallysilicon.However,thephysicalpropertiesofsiliconarereachingalimit,thatis,howsmalltransistorscanbemadeandhowmanycanbeaccommodatedonachip.Ifwecanunderstandhowelectronsmoveonasmallscaleofafewnanometersinthereducedsizeoftwo-dimensionalmaterials,itmaybepossibletounlockanotherwayofusingelectronsforquantuminformationscience.Often,whenamaterialisdesignedtothesesmallscales,reachingasizeofafewnanometers,itwillconfinetheelectronstoaspacewiththesamesizeasitsownwavelength,resultinginchangesintheoverallelectronicandopticalpropertiesofthematerial.ThisprocessiscalledItisquantumconfinement.Forthisreason,researchersusegraphenetostudytheseconfinementeffectsofelectronsandphotons(orlightparticles).Researchersuseauniquegradientalloygrowthsubstratetogrowgraphenewiththreedifferentdomainstructures:singlelayer,Benalstack,andtwisteddoublelayer.Thegraphenematerialisthentransferredtoaspecialsubstrate,allowingtheresearcherstodetecttheelectronicandopticalresonancesofthesystem.Thedetectionresultshows:theelectronmovesbackandforthatthesamefrequencyonthe2Dinterface.Intheconfiguration,thedistancebetweenthetwolayersofmaterialissignificantlyincreased,whichaffectshowelectronsmoveduetotheinteractionbetweenthelayers.Inaddition,tiltingoneofthegraphenelayersby30degreeswillalsoshifttheresonancetoalowerenergy,andtheelectronscanincreasetheinter-layerspacingmovinginit.Inthefuture,researcherswillusetiltedgraphenetomakenewdevices,andonthebasisoftheresultsofthisstudy,observehowtheadditionofdifferentmaterialstothelayeredgraphenestructureaffectsdownstreamelectronicandopticalproperties.

09-22 

What is a lithium battery separator? What are the constituent materials of lithium battery separators?

In the structure of the lithium battery, the diaphragm is one of the key internal components. The performance of the lithium battery separator determines the battery's interface structure, internal resistance, etc., and directly affects the battery's capacity, cycle, and safety performance. A separator with excellent performance plays an important role in improving the overall performance of the battery.

09-22 

An article to understand lithium battery anode materials

As we all know, the four main materials of lithium batteries include positive electrode material, negative electrode material, electrolyte, and separator. So, what is the position of the anode material in the lithium battery material?

09-22 

Needle coke products are favored by battery anode material manufacturers

As more and more power battery manufacturers and battery cell manufacturers choose to use artificial graphite anode materials, anode material manufacturers adjust their product structure accordingly. Needle coke is an important variety of artificial graphite anode raw materials. Because of its low price and high quality, it has become the darling of anode material manufacturers.

09-22 

What are the anode materials for lithium batteries?

At present, the anode materials actually used in lithium-ion batteries are basically carbon materials, such as artificial graphite, natural graphite, mesophase carbon microspheres, petroleum coke, carbon fiber, pyrolytic resin carbon, etc.

09-03 

Warmly celebrate the website of Hunan Yide New Energy Technology Co., Ltd.! ! !

Hunan Yide New Energy Technology Co., Ltd. was established in May 2019. The company is located in Shaoshan, the hometown of a great man Chairman Mao. The project is located in the standardized factory building of the Shuangchuang Demonstration Base in Shaoshan High-tech Zone. It is a company specializing in the research and development of lithium battery anode materials. High-tech enterprise with production.

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