The metal particles’ movement in DC GIL can easily result in gas-gap breakdown or insulator surface flashover. which will seriously reduce GIL’s insulation performance. To suppress the particle movement and discharge. the authors manufactured the colloidal PI/TiO2 nanocomposite film by the in-situ polymerization method and coated the film on the electrode surface. https://bbmbatteryes.shop/product-category/144/