An All‐Solid‐State Rechargeable Chloride Ion Battery

Abstract

The chloride ion battery has been developed as one of the alternative battery chemistries beyond lithium ion, toward abundant material resources and high energy density. Its application, however, is limited by the dissolution of electrode materials and side reactions in the liquid electrolyte. Herein, a solid polymer electrolyte allowing chloride ion transfer and consisting of poly(ethylene oxide) as the polymer matrix, tributylmethylammonium chloride as the chloride salt, and succinonitrile as the solid plasticizer is reported. The as‐prepared polymer electrolyte shows conductivities of 10 −5 –10 −4 S cm −1 in the temperature range of 298–343 K. When it is assembled with the iron oxychloride/lithium electrode system, reversible electrochemical redox reactions of FeOCl/FeO at the cathode side and Li/LiCl at the anode side are realized, demonstrating the first all‐solid‐state rechargeable chloride ion battery.

Halide‐Based Materials and Chemistry for Rechargeable Batteries

“…In this regard, Chen et al. developed the first all‐solid‐state rechargeable chloride‐ion battery . They employed a ternary solid polymer electrolyte (SPE) consisting of a PEO polymer matrix, a quaternary ammonium chloride salt, and a solid succinonitrile (SN) plasticizer.…”

“…Considering the dissolution issue,i ti sp referable to explore and use all-solid-state components that can promote the dissociation of the chloride salt and facilitate chloride-ion transfer in the electrolyte.I nt his regard, Chen et al developed the first all-solid-state rechargeable chloride-ion battery. [323] They employed aternary solid polymer electrolyte (SPE) consisting of aP EO polymer matrix, aq uaternary ammonium chloride salt, and as olid succinonitrile (SN) plasticizer. Thef lexible SPE showed conductivities of 10 À5 -10 À4 Scm À1 in atemperature range of 298-343 Kand enabled reversible transfer of chloride ions between the cathode and anode.T he addition of SN plasticizer in the SPE brought about strong chemical interactions that decreased the crystallinity of the SPE and dissociated the chloride salt, which promoted ion transport in the SPE.…”

CoFe–Cl Layered Double Hydroxide: A New Cathode Material for High‐Performance Chloride Ion Batteries

“…As a proof of principle, a type of secondary battery based on chloride transfer has recently been demonstrated, using metal chloride salts (BiCl 3 , VCl 3 , and CoCl 2 ) as cathode and metal lithium (or magnesium) as anode, by virtue of a large change in Gibbs free energy during the phase transformation between metal chloride and metal . Several metal oxychlorides, such as BiOCl, VOCl, and Sb 4 O 5 Cl 2 were further explored as electrode materials in nonaqueous or aqueous CIBs . Despite the progress in chloride ion batteries (CIBs), many problems still exist regarding cathode materials, including unsatisfactory capacity, dissolution of cathodes by electrolytes, and large volume expansion.…”

Halogenid‐basierte Materialien und Chemie für wiederaufladbare Batterien

“…In diesem Zusammenhang entwickelten Chen et al. die erste gesamthaft feste wiederaufladbare Chlorid‐Ionen‐Batterie . Sie setzten eine ternären festen Polymerelektrolyten (SPE) bestehend aus einer PEO‐Polymermatrix, einem quartären Ammoniumchlorid‐Salz und einem festen Succinonitril (SN) als Weichmacher ein.…”