Simple Preparation of Baroque Mn-Based Chalcogenide/Honeycomb-like Carbon Composites for Sodium-Ion Batteries from Renewable Pleurotus Eryngii

Severe particle aggregation and performance fading hinder the application of Mn-based chalcogenides (MBCs) in sodium-ion batteries, and most modifications focus on complicated structure design. With the introduction of renewable Pleurotus eryngii, MBCs/honeycomb-like carbon (HLC) composites are prepared via a simple and sustainable method in this work. Benefitting from the complex and protogenetic carbon frameworks, the composites show much better sodium storage performance than pure chalcogenides. The outstanding performance of the composites can be attributed to the effective cooperation between high-capacity MBCs and high-stability HLC. Besides, real-time kinetics and rate-determining steps of the sodium storage process are also revealed by in situ electrochemical impedance spectrum analysis. This simple and sustainable method may be not only feasible for complicated-structure MBCs composites but also promising for other metal chalcogenides.