Optimized Pinecone-Squama-Structure MoS 2 -Coated CNT and Graphene Framework as Binder-Free Anode for Li-Ion Battery with High Capacity and Cycling Stability.

Extensive research has been conducted on the development of high-rate and cyclic stability anodes for lithium batteries (LIBs) due to their high energy density. Molybdenum disulfide (MoS 2 ) with layered structure has garnered significant interest due to its exceptional theoretic Li + storage behavior as anodes (670 mA h g -1 ). However, achieving a high rate and long cyclic life of anode materials remains a challenge. Herein, we designed and synthesized a free-standing carbon nanotubes-graphene (CGF) foam, then presented a facile strategy to fabricate the MoS 2 -coated CGF self-assembly anodes with different MoS 2 distributions. Such binder-free electrode possesses the advantages of both MoS 2 and graphene-based materials. Through rational regulation of the ratio of MoS 2 , the MoS 2 -coated CGF with uniformly distributed MoS 2 exhibits a nano pinecone-squama-like structure that can accommodate the large volume change during the cycle process, thereby significantly enhancing the cycling stability (417 mA h g -1 after 1000 cycles), ideal rate performance, and high pseudocapacitive behavior (with a 76.6% contribution at 1 mV s -1 ). Such a neat nano-pinecone structure can effectively coordinate MoS 2 and carbon framework, providing valuable insights for the construction of advanced anode materials.