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Lithium ion battery anode materials(silicon-based)
To improve capacity and energy density of LIB, DAEJOO ELECTORNIC MATERIALS developed Si-based composite oxide materials showing the performances beyond the limit of traditional carbon anode materials. Compared to the limit of capacity of carbon anode 370mAh/g, it is able to realize around 4 times of carbon material capacity.
Application
Comparison of properties
Carbon Si SiOx SnrP Li metal
Theoretical capacity 370 [mAh/g] ~4200 [mAh/g] ~2000 [mAh/g] ~1000 [mAh/g] ~4000 [mAh/g
Stability/
Cost
Normal/
Moderate
Poor/
Slightly high
Normal/
Slightly high
Normal/
Moderate
Poor/
High
Eco-friendly Normal Good Good Normal Good
Status of development Commercial Under development Market validation Market validation Under development
Application fields Small, medium Small, medium High capacity Small, medium High capacity Small, medium High capacity Medium, large
High power
High capacity
Properties of silicon-based anode materials
DSO-C05 DMSO-C05
Silicon crystal size <10 nm Silicon crystal size <15 nm
Particle size[D50] 1~6 ㎛ Particle size[D50] 1~6 ㎛
BET surface area 5~25 m2/g BET surface area 5~25 m2/g
Oxygen content 34~36 wt% Oxygen content 25~35 wt%
Carbon content 2~7 wt% Carbon content 2~7 wt%
ELECTROCHEMICAL PERFORMANCES
Initial charge/discharge efficiency 74~76% Initial charge/discharge efficiency 80~85%
Charge capacity 2000~2100mAh/g Charge capacity 1500~1700mAh/g
Discharge capacity 1500~1600mAh/g Discharge capacity 1200~1400mAh/g