Effect of polydopamine surface coating on polyethylene separators as a function of their porosity for high-power Li-ion batteries

New flame-retardant composite separators based on metal hydroxides for lithium-ion batteries

“…Gurley number of the separators was evaluated using a densometer (4110N, Thwing-Albert, USA) according to JIS P8117 [17]. The Gurley number is determined by measuring the elapsed time of a specific volume of air (100 mL) to pass through separators under a given pressure (here, 6.52psi) [17].…”

“…The Gurley number is determined by measuring the elapsed time of a specific volume of air (100 mL) to pass through separators under a given pressure (here, 6.52psi) [17].…”

“…The porosity of the bare separators was evaluated by a simple liquid absorption test according to ASTM D2873 [9,17]:…”

Nano Ceramic Coating on Polypropylene Separator for Safety-Enhanced Lithium Secondary Battery

“…[7][8][9][10][11][12][13] 내열성 고분자 코팅은 내열성 이 높은 고분자 (Polyimide, Polydopamine 등)로 분 리막에 코팅하여 열 안정성을 향상시키는 방법이다. [14][15][16] 가교 고분자 코팅은 가교제를 코팅한 후 전자선 및 에너지를 주어 고분자 사슬이 가교하여 분리막의 기 계적 물성 및 열 안정성을 향상시키는 방법이다.…”

Bifunctional separator as a polysulfide mediator for highly stable Li–S batteries

“…To overcome this problem, the focus has been shifted recently from modification of the cathodes to modification of the separators. Strategies that have been employed to modify the surface of the separator have involved using various polymers for higher electrolyte intake [49][50][51][52] and various carbon coatings to entrap the lithium polysulfides on the cathode side and, thereby, stop the shuttling phenomenon [53][54][55]. Herein, we report a novel approach of using a bifunctional separatorformed by spray-coating poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on top of the separator-that is not only a facile and effective method for suppressing the shuttling mechanism of lithium polysulfides but also modifies the surface of the separator from hydrophobic to hydrophilic, resulting in greater wettability, enhanced electrolyte intake, and increased electrochemical performance.…”