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Electrostatic Dry Deposition of Nanocomposite Particles for Li ion battery
Keywords: Dry powder coating, Nanocomposite, Porous film
Organic solvents are widely used in wet coating for manufacturing Li ion batteries. This study focused on switching to environmentally benign solvent-free process, and examined a possibility of electrostatic dry coating (EDC) of cathode materials which are generally composed of active oxides, conductive and binder additives. Firstly, the composite particles containing the three components were prepared by dry mechanical treatment, and then EDC experiment was performed for the composite particles. Interestingly, the composite particles could be tribo-charged enough for electrostatic deposition on an earthed Al substrate in dry air, with relatively high deposition rate. A half cell was assembled using the pressed film as cathode electrode, and it was demonstrated that the initial charge-discharge characteristics were comparable to those obtained for wet-coated films.
Hiroya Abe,
Osaka University
Ibaraki, Osaka
Japan


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