Powder coating technologyPowder coating technology

Surface activity control of rechargeable battery Cathode ・Deterioration restraint of the electrolyte・Elution restraint of each atoms from active material

Appearance of Cathode active materials

Coatable cathode active martial exampleCompositionParticle Size 1 ～ 20μm（Spherical or Para-spherical）

Surface coated cathode active materialsActive materials

SEM

Active materialsatomic composition

EDS Mapping

Coat materials atomic composition

EDS Mapping

<Particle cross section>

Active material

Coat material

< Results >・Deterioration restraint of the electrolyte・Elution restraint of each atoms from activematerial

＜Cycle test （High-Load test）＞ 55℃,cut off 4.4V

coated

uncoated

・DOWA unique technologies makes dense and homogeneous coat layer on active material.・High reliability and low capacity retention during cycle test

120％

100％

80％

60％

40％

20％

0％0 10 20 30 40 50 60 70 80 90 100

Disharge Capacity(%)

Cycle Number

NMC (Li(NiaMnbCo1-a-b)O2) /NCA(Li(NiaCobAl1-a-b)O2 )

Para spherical typeSpherical type