Titanium (Ti) Foil Chips (D=10-16 mm, T=10-100 um) as Anode-Free Current Collector for Aqueous Zn-Ion Battery, 100 pcs/bag, CAZIBAFCCTiFC

Titanium (Ti) foil chips (precision-cut discs, squares, or custom geometric pieces of titanium metal) serve as an advanced, highly corrosion-resistant current collector substrate for anode-free (zero-excess) aqueous zinc-ion batteries. Unlike conventional copper current collectors, which can face severe corrosion and passivation challenges in aqueous environments, titanium offers exceptional chemical stability, making it a premier substrate choice for demanding aqueous configurations.

The key structural and electrochemical advantages of woven copper mesh chips in anode-free cells are: (1) Exceptional Aqueous Corrosion Resistance: In mild-acidic or neutral zinc salt electrolytes (such as ZnSO4 or Zn(OTf)2), copper foils are prone to gradual chemical corrosion, pitting, or parasitic side reactions over extended cycling. Titanium is inherently stable in these aqueous environments, preventing substrate degradation and eliminating transition-metal crossover contamination. (2) Suppression of Uncontrolled Substrate Dissolution: During deep stripping cycles where all active zinc is removed from the anode-free current collector, copper can occasionally undergo oxidative dissolution. Titanium remains structurally intact and inert, maintaining mechanical integrity across hundreds of cycles. (3) Wide Electrochemical Stability Window: Titanium exhibits a broad operational window without undergoing destructive oxidation, supporting high-voltage cell designs and aggressive charging regimes.

References: 

1. Y. Li, et al. In situ formation of liquid crystal interphase in electrolytes with soft templating effects for aqueous dual-electrode-free batteries, Nature Energy, 2024, 9, 1350–1359
2. Y. Song, et al. Bilateral in-situ functionalization towards Ah-scale aqueous zinc metal batteries, Nature Communications, 2025, 16, 3142