Carbon-based materials for more reliable solid-state Li batteries

Abstract

Solid-state Li batteries (SSLBs) featured with high energy density and high safety have been considered as the most promising energy storage devices in the future. However, the issues including the inadequate interfacial compatibility, insufficient properties of solid electrolytes, as well as the dendrite growth of Li anode are still hindering its practical applications. The multi-functional merits of carbon-based materials, particularly their inherent attributes of high electronic conductivity and lightweight characteristics combined with tunable structural configurations and surface chemistries, have shown significant potential and attracted growing attention in the application for addressing critical challenges in SSLBs. In this review, we comprehensively summarize the state-of-the-art applications of carbon-based materials in SSLBs, focusing on their special effects on more stable cathode, more effective solid-state electrolyte and dendrite-free Li anode. The primary mechanisms for their functions of resolving interfacial issues, constructing high-performance solid-state electrolytes, and developing dendrite-free Li anodes to address the current challenges in SSLBs are further discussed and systematically elucidated. Finally, the persistent challenges in fully utilizing carbon-based materials to enhance solid-state batteries are presented, along with perspectives and suggestions for future development of carbon-based materials toward more reliable SSLBs.