title: Lithium Dendrite Suppression with UV-Curable Polysilsesquioxane Separator Binders.
abstract: For the first time, an inorganic-organic hybrid polymer binder was used for the coating of hybrid composites on separators to enhance thermal stability and to prevent formation of lithium dendrite in lithium metal batteries. The fabricated hybrid-composite-coated separators exhibited minimal thermal shrinkage compared with the previous composite separators (<5% change in dimension), maintenance of porosity (Gurley number ∼400 s/100 cm(3)), and high ionic conductivity (0.82 mS/cm). Lithium metal battery cell examinations with our hybrid-composite-coated separators revealed excellent C-rate and cyclability performance due to the prevention of lithium dendrite growth on the lithium anode even after 200 cycles under 0.2-5C (charge-discharge) conditions. The mechanism for lithium dendrite prevention was attributed to exceptional nanoscale surface mechanical properties of the hybrid composite coating layer compared with the lithium metal anode, as the elastic modulus of the hybrid-composite-coated separator far exceeded those of both the lithium metal anode and the required threshold for lithium metal dendrite prevention.
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seong-Buk Gu, Seoul 02792, Republic of Korea.|Department of Chemical and Biomolecular Engineering, Yonsei University , 50 Yonseiro, Seodaemun Gu, Seoul 03722, Republic of Korea.
authors.forename: Wonjun
authors.initials: W
authors.lastname: Na
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seong-Buk Gu, Seoul 02792, Republic of Korea.
authors.forename: Albert S
authors.initials: AS
authors.lastname: Lee
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seong-Buk Gu, Seoul 02792, Republic of Korea.
authors.forename: Jin Hong
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seong-Buk Gu, Seoul 02792, Republic of Korea.|Nanomaterials Science and Engineering, University of Science and Technology , 217 Gajungro, 176 Gajung-dong, Yuseong-Gu, Daejeon 34113, Republic of Korea.
authors.forename: Seung Sang
authors.initials: SS
authors.lastname: Hwang
authors.affiliation: Department of Chemical and Biomolecular Engineering, Yonsei University , 50 Yonseiro, Seodaemun Gu, Seoul 03722, Republic of Korea.
authors.forename: Eunkyoung
authors.initials: E
authors.lastname: Kim
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seong-Buk Gu, Seoul 02792, Republic of Korea.|Nanomaterials Science and Engineering, University of Science and Technology , 217 Gajungro, 176 Gajung-dong, Yuseong-Gu, Daejeon 34113, Republic of Korea.
authors.forename: Soon Man
authors.initials: SM
authors.lastname: Hong
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seong-Buk Gu, Seoul 02792, Republic of Korea.|Nanomaterials Science and Engineering, University of Science and Technology , 217 Gajungro, 176 Gajung-dong, Yuseong-Gu, Daejeon 34113, Republic of Korea.
authors.forename: Chong Min
authors.initials: CM
authors.lastname: Koo
keywords: lithium dendrite; lithium metal battery; separator; silsesquioxane; thermal stability