Advances in Lithium Fluorocarbon Batteries

• 1、School of Chemistry and Chemical Engineering, Chongqing University, 401331

Abstract：Lithium fluorocarbon primary batteries hold a significant position in deep-space exploration, military equipment, and medical implant devices, owing to their ultrahigh theoretical energy density of approximately 2180 Wh/kg, wide operating temperature range, and extremely low self-discharge rate. Early research focused on improving the insulating nature of fluorocarbon through carbon coating, nanosizing, and the design of multi-dimensional conductive networks, thereby enhancing rate capability. In recent years, with the exploration of reversibility, secondary lithium fluorocarbon batteries have emerged as a new hot topic. Through mechanistic investigations, the introduction of metal catalysts, and electrolyte exploration, the reversibility of the conversion reaction has been preliminarily realized, achieving a cycle life of up to tens of cycles. However, current systems are still constrained by insufficient electrical conductivity, volume effects during the defluorination process, and the accumulation of by-products. This review systematically summarizes the research status of primary lithium fluorocarbon batteries, provides a systematic overview of research on secondary lithium fluorocarbon batteries, and discusses the challenges and future prospects as next-generation ultrahigh-specific-energy rechargeable energy storage devices.

Keywords： lithium fluorocarbon batteries research status secondary batteries