Patterning Design of Electrode to Improve the Interfacial Stability and Rate Capability for Fast Rechargeable Solid-State Lithium-Ion Batteries

Abstract

Patterned electrodes were developed for use in solid-state lithium-ion batteries, with the ultimate goal to promote fast-charging attributes through improving electrochemically activated surfaces within electrodes. By a conventional photolithography, patterned arrays of SnO 2 nanowires were fabricated directly on the current collector, and empty channel structures formed between the resulting arrays were customized through modifying the size and interval of the SnO 2 patterns. The composite electrolyte comprising Li 7 La 3 Zr 2 O 12 and poly(ethylene oxide) was exploited to secure intimate interfacial contact at the electrode/ electrolyte junction while preserving ionic conductivity in the bulk electrolyte. The potential and limitation of the electrode patterning approach were then explored experimentally. For example, the electrochemical behaviors of patterned electrodes were investigated as a function of variations in microchannel structures, and compared with those of conventional film-type electrodes. The findings show promise to improve electrode dynamics when electrochemical reaction kinetics could be hindered by poor interfacial characteristics on electrodes.

Waterbed inspired stress relaxation strategies of patterned silicon anodes for fast-charging and longevity of lithium microbatteries

“…Eqn (2) can be used to gain further insight into the detailed Li-ion storage mechanism 68 contributed by the pseudocapacitive ( k 1 ν ) (surface area dependent) or diffusion ( k 2 ν 0.5 ) process. 69,70 I p = k 1 ν + k 2 ν 0.5 where k 1 and k 2 are constants at given potentials, which can be derived by plotting I ν −0.5 versus ν 0.5 (Fig. 6e).…”

“…Eqn (2) can be used to gain further insight into the detailed Li-ion storage mechanism 68 contributed by the pseudocapacitive (k 1 n) (surface area dependent) or diffusion (k 2 n 0.5 ) process. 69,70…”

The progress of in situ technology for lithium metal batteries

“…1). It has been proved that AFM, 40 SEM, 41,43 OM 42 and TEM [44][45][46] can effectively characterize the SEI morphology, and the advanced cryo-EM [47][48][49] technology can more accurately reflect the real interface. XRD, 50,51 XPS, 52 IR, 53 and NMR 54 can be used to effectively characterize the composition and structure of SEI.…”

Micro-nano structural electrode architecture for high power energy storage

“…Recently, Zhu et al constructed an aqueous Ni-Zn microbattery (MB) with ultrahigh rate capability and durability by in situ reconstruction of epitaxial phase nanoporous Ni (Fig. 1(g)) [15] . The surface reconstruction of interconnected nanoporous Ni enables sufficient conductivity and reaction sites, and the as-prepared Ni-Zn MB has a high power density of 320.17 mW/cm 2 and a maximum energy load of 0.26 mW•h/cm 2 (Fig.…”

“…(h) Ragone plots of the Ni-Zn microbattery. Reproduced with permission [15] , Copyright 2021, Wiley-VCH. (i) Comparison of a usual SnO 2 NW electrode (left-hand) with a new design of micropatterned NW electrode (right-hand).…”