Approach to Improvement in the Low Temperature Characteristics of LIB
Proposal for improvement in input and output characteristics and low temperature characteristics through material surface control and nanomaterials
Improvement in low temperature input and output characteristics
through nanomaterial synthesis and nanosizing technologies
Proposal for the development of technology to lower resistance using nanosized active materials
Proposal for the development of technology to synthesize positive electrode nanomaterials (application phase)
A key factor for successful synthesis of metallic oxide nanoparticles is to control particle growth during the reaction (particle size control)
Utilization of a polymer matrix as a means to control particle growth by limiting mass transfer taking advantage of the fact that polymers reduce mass transfer speeds
Confirmation of the resistance reduction effect with nano-NMC (not more than 100 nm) (Patent pending)
⇒ Proposal for examination of the synthesis conditions for producing several nanosized active materials
⇒ Proposal for study of the resistance reduction effect of the developed nanosized materials
(Raw materials: metallic compounds thermally decomposable at a temperature lower than the decomposition temperature of polymers)
Proposal for development of the technology to lower resistance with nanosized carbon materials (Search phase)
Patent owned by KRI (Patent No. 4841814)
- Carbonaceous material: average particle size of not more than 1 μm and not less than 0.1 μm and a specific surface area of less than 20 m2/g
- Electrode: density of not less than 1.0 g/cm3 and electrical conductivity of not less than 1.0 × 10-2 S/cm
- Application of discharge current to the carbonaceous material at a rate of 6000 mA per 1 g of the carbonaceous material → 275 mAh/g (confirmation of output increase effect)
⇒ We propose the development of technology to lower resistance with nanosized carbon material on the basis of the above knowledge.
2016.8
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