Q:Whatbenefitsdosolidstatebatterieshaveoverexistinglithiumionbatteries?
A:Themajorbenefitsofsolidstatebatteriesderivefromthesolidelectrolyte.Conventionallithium
Ionbatteriesuseanorganicsolventwhichisflammableandhasarelativelyshortusefullife.
Performancebenefitsinclude:
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Fastercharging(6xfaster)
Increasedenergydensity(2xenergyforthesamevolume)
Increasedcyclelife(upto10years,comparedto2)
Lowleakagecurrents(nanoAmps)
Nonflammability
Q:Isthebatteryvoltagesimilartocurrentlithiumionbatteries?
A:TheoutputvoltagefortheStereaxTMM250is3.5V.
Q:whatapplicationscouldthebatteriesbeusedin?
ThesizeandperformanceoftheStereaxTMM250solidstatebatterymakeitidealforapplicationsin
autonomoussensordevicesintheInternetofThings.Itslowself-dischargeallowsittobetricklechargedbyanenergyharvestingsourcesuchasvibrationoraPVpanel.Itshighpeakcurrent
enablesthetransmissionofdatausingprotocolssuchasBluetoothLowEnergy.Thecombinationof
energyharvester,transmitter,sensorandtheM250isidealforintegrationintosmall,“fitand
forget”autonomoussensordeviceswithmultipleapplicationsincluding,SmartHomes(HVAC,light,
security),Automotive(infotainment,sensors),logistics(assettracking)andmedicaldevices
(Biometricmonitoring)
Q:Canthebatterypowerrealdevices?
IlikahasdemonstratedtheabilityofitsStereaxTMM250solidstatebatterytopowerarealdevice
withintheInternetofThings.ThisdeviceisaPerpetualBeaconforSmartHomes,inotherwords,an
autonomoussensingdeviceofminimalsizewhich,fixedonawall,measurestemperaturedataat
regularintervalandtransmitthedatausingBluetoothLowEnergytoanapp.Theappdisplays
temperatureinformationaswellasthebattery’sstateofchargeandindicatesifheatingneedstobe
startedorstopped.ThisdevicereplicatessensorsforSmartHomes,wherethedatacouldalsobe
senttoahubforautomatedcontrol,butissosmallasbeingeasilyforgotten.
Q:Whatmaterialsareusedinthebatteries?
A:TheStereaxTMM250batteriesusesimilarcathodestocurrentlithiumbatteriesbutweuse
differentmaterialsfortheelectrolyteandanode.TheanodeintheStereaxTMM250issilicon.
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Q:Whatistheoperatingtemperaturerangeofthebatteries?
A:TheStereaxTMM250canworkbetween-20DegCand100DegC
Q:Aresolidstatebatterieslimitedtothesamecylindrical(prismatic)formatasconventional
batteriessuchasAAorAAAformat?
A:SolidstatebatteriesareflatandourStereaxTMM250batterieshaveasquarefootprint.The
footprintcanbeadaptedtosuittheenddevicerequirements.
Q:Howthincanasolidstatebatterybe?
A:Thethicknessisdependentonthethicknessofthesubstrate.FortheStereaxTMM250battery,we
useastandard650µmsiliconsubstrate,andtheoverallthicknessofthebatteryislessthan750µm
thick.Testsareon-goingtouseothersubstratessuchas200µmglass.
Q:Whatisthescalabilityofthetechnology?
A:Ilika’sbatteriescanbescaledtolargerfootprintsusingproductionprocessesusedtoproducebulk
glassandphoto-voltaicsheets.Thiscreatesthepotentialforlargeareabatteries.
Q:HowdoesIlika’ssolidstatebatterydifferfromothersolidstatebatteries?
A: The main difference is the combination of materials. Other solid state batteries use “free lithium”
which is highly reactive with moisture and air and hence require stringent encapsulation. In the
StereaxTM M250, the lithium is not free during storage or cycling; it is “alloyed” in the cathode or
anode and this reduces the encapsulation requirements. The combination of material and synthesis
method enable a 40% energy improvement per footprint and an increased operating temperature
range.
Q:DoesIlikahavepatentsprotectingthisnewtechnology?
A: Ilika currently has 5 patents which cover three main areas: the composition of the materials in the
battery, the process to make the battery and the cell architecture of the battery.
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