Facile Preparation of Chloride‐Conducting Membranes: First Step towards a Room‐Temperature Solid‐State Chloride‐Ion Battery

Abstract

Three types of chloride‐conducting membranes based on polyvinyl chloride, commercial gelatin, and polyvinyldifluoride‐hexafluoropolymer are introduced in this report. The polymers are mixed with chloride‐containing salts, such as tetrabutylammonium chloride, and cast to form membranes. We studied the structural properties, thermal stability, and electrochemical response of the membranes to understand chloride migration and transport. Finally, the membranes are tested in a prototype solid‐state chloride‐ion battery setup. The feasibility of the membranes for their potential use in anion batteries is discussed.

Halide‐Based Materials and Chemistry for Rechargeable Batteries

“…[319][320][321] Gschwind et al investigated three types of chloride-ionconducting quasi-solid-state polymer electrolytes composed of ap olymer matrix of polyvinyl chloride,acommercial gelatin or polyvinyldifluoride-hexafluoropolymer, and achloride resource of tetrabutylammonium chloride. [322] The authors combined these electrolytes with CuCl 2 ·H 2 O/Zn and PA NI/Zn electrode systems.H owever,t hey only performed the first discharge testing,and the principles of the assembled batteries were not proven.…”

Chloride Ion Battery Review: Theoretical Calculations, State of the Art, Safety, Toxicity, and an Outlook towards Future Developments

“…Although the presence of metallic Bi was established, the Bi 2 O 3 phase could not be found (Figure a, second line). This is not surprising, however; Bi halide salts (BiX 3 ) are widely used in halide batteries precisely because of this easy reduction to metallic Bi, which is easy to detect by XRD . Interestingly, in the as‐prepared powder, peaks indicating metallic Bi seemed to appear in the XRD pattern (Figure a, first line).…”

“…Zhao et al and Gschwind et al both proposed the use of organic conductive polymers as the cathode. In one paper, polyaniline (PANI) was used in combination with a chloride‐conducting polymer electrolyte.…”

“…In the work of Gschwind et al, a completely new approach to solving the electrode dissolution problem was proposed. Instead of developing more stable cathodes, they suggested the use of polymer electrolytes (Figure ) …”

Halogenid‐basierte Materialien und Chemie für wiederaufladbare Batterien

“…Gschwind et al. untersuchten drei Typen von Chloridionen‐leitfähigen quasi‐festen Polymerelektrolyten bestehend aus einer Polymermatrix aus Polyvinylchlorid, einer kommerziellen Gelatine oder Polyvinyldifluoridhexafluorpolymer und einer Chloridressource von Tetrabutylammoniumchlorid . Sie integrierten diese Elektrolyte mit CuCl 2 ⋅H 2 O/Zn‐ und PANI/Zn‐Elektrodensystemen.…”