Industry Information_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 

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 

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.

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

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

Tilted graphene structure may promote the development of quantum computing

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

An article to understand lithium battery anode materials

Needle coke products are favored by battery anode material manufacturers

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