Constructing the high-areal-capacity, solid-state Li polymer battery via the multiscale ion transport pathway design. (June 2022)

• Record Type: Journal Article
• Authors: Zhang, Min; Zhou, Kefan; Ma, Donghao; Wang, Helin; Tang, Xiaoyu; Bai, Miao; Liu, Fu; Wang, Zhiqiao; Ma, Yue
• Is Part Of: Materials today. Volume 56(2022)
• Page Start: 53
• Page End: 65
• Publication Date: 2022-06
• Subjects: Solid-state batteries -- High-areal-capacity -- Multiscale transport pathways -- Mixed-conductive network -- Critical current density -- Flame-resistance; Materials science -- Periodicals; Metallurgy -- Periodicals; Metal-work -- Periodicals; Biomedical and Dental Materials -- Periodicals; Manufactured Materials -- Periodicals; Metals -- Periodicals; 620.11
• DOI: 10.1016/j.mattod.2022.04.004
• Languages: English
• ISSNs: 1369-7021

Abstract

Graphical abstract: Abstract: The parasitic Li dendrite formation and retarded ion diffusion dynamics inhibit the deployment of solid-state batteries (SSBs) at high areal capacity loadings. Here, we present the modular design of the Li + percolating network by grafting the ionic-conductive polyether amine (PEA) at the multiple scales: the PEA modified zinc hydroxystannate (PEA@ZHS) (flame retardant units) and polyamide 6 (mechanical rigid units) are coherently introduced to optimize the PEO-based solid electrolyte (PX-PEA@ZHS) with the Young's modulus (3.41 GPa), ionic conductivity (4.29 × 10 −4 S cm −1 at 55 °C) and flame retardancy (22% reduction of heat release rate); on the other hand, PEA molecules are grafted onto the acetylene black additive to establish the dual conductive network, endowing two orders of magnitude increase of ionic conductivity for the high-compaction cathodes. The as-integrated symmetric cell exhibits a critical current density up to 0.8 mA cm −2 and cycling endurance for 1000 h at 0.2 mA cm −2 ; upon the SSBs assembly with the record high loading of LiFePO4 (12.4 mg cm −2 ), the high-areal-capacity, cycling stability as well as the extreme temperature endurance till 110 °C are simultaneously realized, which inspire the rational design of commercially feasible, energy-dense, flame-resistance energy storage prototype.