Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries

A hydrated deep eutectic electrolyte with finely-tuned solvation chemistry for high-performance zinc-ion batteries

“…7,8 The solvation effect impels electron transfer via the Zn-OH 2 coordination, strikingly weakens the O-H bond and accelerates the decomposition of solvated water molecules during the zinc deposition process, which subsequently leads to notorious hydrogen evolution reaction, surface passivation and dendrite growth at the electrolyte/anode interface. [9][10][11][12] Moreover, free water molecules with strong polarity can induce irreversible collapse of lattice structures and thereby lead to severe dissolution of active materials at the electrolyte/cathode interface during the discharge process. [13][14][15] Therefore, the strategies to solve these bottlenecks are of great research significance and application value.…”

FeCo/N-co-doped 3D carbon nanofibers as efficient bifunctional oxygen electrocatalyst for Zn–air batteries

“…Moreover, the carbonized nanofibers still have a good three-dimensional network structure, which endows the catalyst with remarkable connectivity. 56,57 In addition, Fig. 3g demonstrates the superior electrocatalytic ORR stability, retaining 86.03% of the initial current density after a prolonged i – t test, and this was superior to that of Pt/C (80.83%).…”

Localized gelation cellulose separators enable dendrite-free anodes for future zinc-ion batteries

“…The increased impedance is reduced by replenishing the electrolyte and is not a consequence of side reactions. 18,19…”

“…The increased impedance is reduced by replenishing the electrolyte and is not a consequence of side reactions. 18,19 The three areas in Fig. 2c correspond to the cellulose crystalline peak, specifying the various structures of the LGS caused by local gelation.…”