Recent Advances in Polymers for Potassium Ion Batteries

Abstract

Potassium-ion batteries (KIBs) are considered to be an effective alternative to lithium-ion batteries (LIBs) due to their abundant resources, low cost, and similar electrochemical properties of K+ to Li+, and they have a good application prospect in the field of large-scale energy storage batteries. Polymer materials play a very important role in the battery field, such as polymer electrode materials, polymer binders, and polymer electrolytes. Here in this review, we focus on the research progress of polymers in KIBs and systematically summarize the research status and achievements of polymer electrode materials, electrolytes, and binders in potassium ion batteries in recent years. Finally, based on the latest representative research of polymers in KIBs, some suggestions and prospects are put forward, which provide possible directions for future research.

A Systematic Review of MOF, COF, and Their Hybrid‐Based Composite Membranes for Gas Separation

“…These materials have porous and crystalline structures and are composed of organic and inorganic materials. [ 46,56,57 ] The various functionalities of MOF–COF makes them one of the fastest‐growing materials in industrial applications and scientific research areas. COFs can be grown or layered on MOFs; the reverse is also possible.…”

Enhanced structural, electrical, and electrochemical performance of polyethylene oxides (PEO)‐based polymer electrolytes for solid state K+ ion batteries

“…According to the authors, when combined into cells, these electrolytes' superior ionic transport properties make them suitable for low-current applications. 17 Creating K-ion conducting electrochemical devices requires the development of both electrodes and electrolytes, which are equally important. The main challenges in developing K-ion conducting electrolytes are low coulombic efficiency, extreme side reactions that happen at the electrolyte and potassium metal, as well as unstable electrolyte-electrode interference.…”

“…The maximum conductivity of 5.6 × 10 −7 and 5.01 × 10 −7 S cm −1 was observed for KCl (70PEO:30KCl), and KBr (70PEO:30KBr) SPE films, respectively. According to the authors, when combined into cells, these electrolytes' superior ionic transport properties make them suitable for low‐current applications 17 …”

Designing strategies of advanced electrode materials for high-rate rechargeable batteries

“…This could lead to a wider electrochemical voltage window, resulting in a high energy density for PIBs. 23 Recently, rechargeable zinc-ion batteries (ZIBs) have become an attractive candidate due to inexhaustible resources, environmental friendliness and high specific capacity. 24 In addition, the Zn 2+ /Zn redox reaction usually renders low polarization with fast ion diffusion in aqueous electrolytes, delivering high-rate capability.…”