Confining nonflammable liquid in solid polymer electrolyte to enable nickel-rich cathode-based 4.2 V high-energy solid-state lithium-metal and lithium-ion batteries. (March 2022)

• Record Type: Journal Article
• Authors: Yee, Minha; An, Kihun; Nguyen, Dan-Thien; Yun, Hyea Won; Park, Jinkyu; Suk, Jungdon; Song, Seung-Wan
• Is Part Of: Materials today energy. Volume 24(2022)
• Publication Date: 2022-03
• Subjects: Solid-state lithium-metal battery -- Solid-state lithium-ion battery -- Solid polymer electrolyte -- Non-flammable liquid -- Highly loaded Ni-rich NCM; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2022.100950
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Solid polymer electrolyte (SPE)-based solid-state batteries (SSBs) offer a potential safety, but the integration of practical cathode loading for high-energy density SSBs is a challenge. Herein, we demonstrate a proof of unique design concept of "NonFlammable Liquid-confined in-Solid Polymer Electrolyte" (NFL-SPE) enabling highly loaded (10 mg cm −2 ) LiNi0.8 Co0.1 Mn0.1 O2 (NCM811) cathode-based 1.5 mAh cm −2 -class solid-state 4.2 V Li-metal and Li-ion batteries. in-situ crosslinked semi-interpenetrating polymer network SPE maintains its solid form when limiting the confined NFL amount to 35 wt%. The NFL comprises propylene carbonate, fluorinated linear carbonates, and solid electrolyte interphase-forming additives of lithium bis(phthalate)borate and vinylene carbonate. The critical roles of NFL are to enhance ion conductivity to 2-fold from SPE only and 1000-fold from traditional poly(ethylene) oxide, to permit a facile interfacial wetting to highly loaded NCM811 and to reduce interfacial resistance. A higher discharge capacity of 169 mAh g −1 is achieved with Li/NFL-SPE/NCM811 at 45 °C with improved cycling performance and a suppressed lattice contraction of NCM811 along the c -axis, compared to that with SPE only. Importantly, an unprecedented 1.5 mAh cm −2 -class solid-state Li-ion battery is realized by fabricating silicon-graphite/NFL-SPE/NCM811 utilizing silicon (5 wt%)-graphite anode active material and showing stable 50 cycles at 25 °C. Graphical abstract: Image 1 Highlights: "NonFlammable Liquid-confined in-Solid Polymer Electrolyte" (NFL-SPE) for solid-state Li-metal and Li-ion batteries. Highly loaded (10 mg cm −2 ) LiNi0.8 Co0.1 Mn0.1 O2 -based 1.5 mAh cm −2 high-energy solid-state batteries. Roles of NFL as Li + -ion conductivity enhancement, facile interfacial wetting, impedance reduction, and performance improvement. Unprecedented solid-state Li-ion battery based on Si-graphite anode.