What changes will occur to the performance of the electrolyte in lithium-ion batteries at low temperatures?

Tech 2023-05-17 04:54:54 Source: Network

Wen/DazhuangEditor/DazhuangstayLow temperature environmentThe electrode reaction rate of lithium-ion batteries decreases, leading to a decrease in battery capacity. This is caused by factors such as the decrease in ion conductivity of electrolytes at low temperatures and the decrease in reactivity of electrode surface active substances

Wen/Dazhuang

Editor/Dazhuang

stayLow temperature environmentThe electrode reaction rate of lithium-ion batteries decreases, leading to a decrease in battery capacity. This is caused by factors such as the decrease in ion conductivity of electrolytes at low temperatures and the decrease in reactivity of electrode surface active substances.

Reduced diffusion rate of lithium ions: under low temperature conditions, the electrolyteIncreased viscosityIon diffusionSlow down the speedstay

Reduced activitystaystayReduced activityThis limits the storage and release capacity of active substances in batteries.

/Low temperature environmentSlow down the speedLithium metal dendritestayLithium metal dendrite

Low temperature environmentconductivityIncreased viscosityLow temperature environmentstaySlow down the speedReduced the conductivity of the electrolyte.

staystay

stayReduced the conductivity of the electrolyte.

stayLow temperature environmentmobilityIn order to reduce the electrolyte'sconductivity

stayLithium metal dendritestayconductivitystayUneven deposition

Slow down the speedstayLow temperature environmentSlow down the speedstayDendrite

stayLithium metal dendrite

add tosaltLithium metal dendriteadd tosaltstayLithium metal dendrite

Lithium metal dendriteSerious safety issues such as combustion and explosion

Lithium metal dendritestayLithium ion depletion

Lithium metal dendriteLithium metal dendriteTemperature rise

Lithium metal dendritestayDendrite

add toLithium metal dendriteadd tostayLow temperature environmentadd toDendriteDendriteadd to

add toLithium metal dendriteadd toadd toLiFLiBOBLi2SO4add toDendrite

Forming stableSolid electrolyte interfaceSEIadd tostayForming stableSolid electrolyte interfaceDendrite

add toDendrite

add toLithium metal dendriteadd toadd toPEOPANPAAadd to

add tostayDendriteDendrite

add toLithium metal dendrite

add toadd toLithium metal dendriteadd toadd toadd toadd to

add toadd toadd toSolid electrolyte interfaceadd toadd toLithium metal dendrite

add toadd toadd tostayLithium metal dendriteDendrite

conductivityOptimize the formula of the electrolytesalt

staymobilitysaltLiPF6LiFSIconductivity

conductivitystayLow temperature environmentmobilityDMEDEEconductivity

saltsaltconductivitysaltLiPF6LiBF4LiTFSIsaltconductivity

stayOptimize electrolyte formulaadd toadd toadd toconductivityadd toadd toadd toadd toadd toconductivity

saltconductivitysaltIncreased viscosityconductivity

Low temperature environmentmobilitystay

add toDendriteadd toLithium metal dendriteOptimize electrolyte formulaCan significantly improve the performance of the electrolyteconductivitystay

stayLow temperature environmentstaystay

Lithium metal dendriteadd toDendriteDendriteadd to

stayElectrode interface and solid electrolyte interfacestay

Optimize electrolyte formulastaySolid electrolyte with high ionic conductivity and good low-temperature stabilitystay

stayLow temperature environment

conclusion

stayLow temperature environmentconductivityLithium metal dendriteadd toDendriteadd toOptimize electrolyte formulaconductivity

add tostayLow temperature environment

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