Gradient fluorinated alloy to enable highly reversible Zn-metal anode chemistry

Abstract

Unsatisfying reversibility of zinc (Zn) metal anode seriously hinders its further practical applications. It corresponds to two major issues including the notorious dendrite growth and the exacerbated hydrogen evolution, resulting...

Stable Zinc Anodes Enabled by a Zincophilic Polyanionic Hydrogel Layer

“…Such a fluctuation can be explained by the enlarged active area caused by rough dendrites growth and the subsequent surface passivation due to HER. [ 48 ] In contrast, Zn–SHn reveals a relatively more stable charge transfer resistance during the zinc plating/stripping test.…”

Stabilized Zn Anode Based on SO42– Trapping Ability and High Hydrogen Evolution Barrier

“…As shown in Figure 4e, the changes in corrosion potential and current after surface modification indicate a suppressed corrosion reaction. [50] In view of the correlation between H 2 evolution and parasitic reaction (the equations as follow), [16,51,52] DFT calculations were also performed to elaborate the inhibition of side reactions. As shown in Figure 4f and Figure S18, Supporting Information, each position on the SR and SR-SO 4 2has high hydrogen barrier compared to the bare Zn (0.82 eV for Zn (001)).…”

A hydrophobic layer of amino acid enabling dendrite-free Zn anodes for aqueous zinc-ion batteries

“…At the moment, various strategies have been introduced to achieve high reversibility of the zinc anode, including (1) constructing articial functional layers, [16][17][18][19][20][21][22] (2) alloying, [23][24][25][26] (3) using highly concentrated electrolytes, [27][28][29] (4) adding electrolyte additives, [30][31][32] and (5) using gel electrolyte. 33 Among these strategies, articial functional layers have demonstrated great potential, such as Al 2 O 3 , 34 Sc 2 O 3 , 35 PPy, 36 and HfO 2 , 20 owing to simple synthesis and low cost of construction.…”