Flexible/shape-versatile, bipolar all-solid-state lithium-ion batteries prepared by multistage printing

Abstract

The flexible/shape-versatile bipolar all-solid-state LIBs, which fabricated via solvent-drying-free, UV-curing-assisted multistage printing, are presented as an unprecedented material/process strategy to address longstanding challenges associated with inorganic-electrolyte-based bipolar LIBs.

Solid‐State Lithium Batteries: Bipolar Design, Fabrication, and Electrochemistry

“…[45][46][47] Yet, the electrochemical alloying reaction between Al and Li can easily occur at < 0.5 V vs. Li/Li + : Al has been only used in the BPs of SSLBs assembled with high-potential NEs, e. g., Li 4 Ti 5 O 12 (~1.5 V vs. Li/ Li + ) and 2,6-naphthalene dicarboxylate dilithium (~0.8 V vs. Li/ Li + ). [163,164] Although Ni is less suitable for high-potential PEs compared to Al, it is known to exhibit acceptable chemical stability in certain electrolytes (e. g., LiAlCl 4 in SO 2 ). [46,165] Ni has been used as BPs for the Li NE and TiS 2 PE, [46] and more recently, Nam et al demonstrated the chemical stability of Ni with a Li 3 PS 4 SE and constructed a free-standing, stackable, bipolar SSLB using a Ni-coated non-woven scaffold BP.…”

“…Although the non-fluidic properties of SEs enable a bipolar design by preventing the flow of ions between adjacent cells, the stacking of multiple cells within a single package has been found to be very challenging, and only a few reports on bipolar SSLBs, mostly proof-of-concept studies, have been published thus far. [37,38,149,163,166,170,[173][174][175][176][177][178] The stacking strategies for bipolar SSLBs reported in the literature may be broadly classified into (i) the lamination of free-standing SE sheets and (ii) the printing of SE slurries. The former involves the sequential lamination of free-standing SE sheets and electrode-coated BPs, both of which have sufficient mechanical stability.…”

“…[37,149,166,170,[173][174][175] On the other hand, the latter employs layer-by-layer printing (coating) of SE slurries (inks) on the electrode-coated BPs serving as a mechanical support. [38,163,[176][177][178] Then, another unit cell is stacked on top of the as-printed one. In this section, we review the recent progress in the development of bipolar SSLBs, focusing on SEs, bipolar architectures, and electrochemical performance.…”

“…More recently, the same research group reported the fabrication process of bipolar SSLBs with mechanical flexibility and shape versatility based on a UV-assisted multistage printing technique. [163] The unit cell was fabricated by the sequential printing of NE, SE, and PE inks on the Al current collector followed by UV-induced solidification, and then, the same printing process was repeatedly conducted to fabricate the multi-layered bipolar SSLB battery without delamination and cracking. The hybrid-type quasi-SE was made of Al 2 O 3 nanoparticles and 1 M LiBF 4 in sebaconitrile/ETPTA/poly(vinylidenefluoride-co-hexafluoro-propylene) (PVDF-co-HFP).…”

Multilayered, Bipolar, All‐Solid‐State Battery Enabled by a Perovskite‐Based Biphasic Solid Electrolyte

“…[5][6][7][8][9][10][11][12][13] With increasing interest in portable and flexible electronics,c onsiderable efforts have been investedi nt he fabrication of solid-state microbatteries that can be implemented in wearable or implantable devices. [16][17][18][19][20] In general, large-scale energy storage devices,f or example, for EV applications,r equire high-voltage and high-energy battery modules that possess numerous unit cells connected in series. [16][17][18][19][20] In general, large-scale energy storage devices,f or example, for EV applications,r equire high-voltage and high-energy battery modules that possess numerous unit cells connected in series.…”