Journal Article

Electrolyte formulation strategies for potassium‐based batteries

Li, Chuanchuan, Cui, Guanglei, Xu, Gaojie, Ni, Ling

2022

Overview

Potassium (K)‐based batteries are viewed as the most promising alternatives to lithium‐based batteries, owing to their abundant potassium resource, lower redox potentials (−2.97 V vs. SHE), and low cost. Recently, significant achievements on electrode materials have boosted the development of potassium‐based batteries. However, the poor interfacial compatibility between electrode and electrolyte hinders their practical. Hence, rational design of electrolyte/electrode interface by electrolytes is the key to develop K‐based batteries. In this review, the principles for formulating organic electrolytes are comprehensively summarized. Then, recent progress of various liquid organic and solid‐state K+ electrolytes for potassium‐ion batteries and beyond are discussed. Finally, we offer the current challenges that need to be addressed for advanced K‐based batteries. This review mainly focuses on the recent progress of various liquid organic and solid‐state K+ electrolytes for potassium‐based batteries. First, the key design principles and applications of organic liquid electrolyte in various battery systems are discussed. Then the research status of ionic liquid, gel/polymer, and solid electrolyte are summarized and evaluated. Finally, this review discusses the challenge of various electrolyte/electrode interfaces and puts forward promising research direction and opportunities in the future.

• Publisher: John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
• Subject: Aluminum / Batteries / Dielectric properties / Electrode materials / Electrodes / Electrolytes / Energy / fundamentals of organic electrolytes / Interfaces / liquid electrolytes / Lithium / Metal oxides / Molten salt electrolytes / Nonaqueous electrolytes / Polymers / Potassium / potassium‐based batteries / Review / Sodium / Solid electrolytes / solid‐state electrolytes / Solvents / Viscosity