A Three‐Layer Heterostructured Anode for Fast‐Charging LIBs with 30 A g ⁻¹ Current Density and 10 000 Cycle Durability

Amid the growth of the lithium‐ion battery (LIB) industry, high‐demand fast‐charging LIBs face bottlenecks in current anode materials. This study proposes a multi‐in‐one organic combination strategy to design the 3D heterostructured anode C@MoSe 2 /SnSe 2 @CNTO, synthesized via simple high‐temperature annealing. Its outer layer is carbon‐coated, middle layer is MoSe 2 /SnSe 2 ‐doped nanosheets, and inner layer is carboxylated carbon nanotubes (CNTO) as the skeleton. As a LIB anode, it delivers 1788 mAh g −1 (500 cycles at 0.5 A g −1 ), tolerates 30 A g −1 , and lasts 10 000 cycles. Heterojunctions accelerate electron transfer and alleviate volume expansion; cycling‐generated hard carbon and refined nanoparticles boost capacity; charge‐discharge‐induced ultra‐stable SnSe 2 nanoparticles slow fading. At 30 A g −1 , it has initial 530 mAh g −1 (discharge capacity for the first time after activation), peaks at 920 mAh g −1 , and retains 667 mAh g −1 (125%) after 10 000 cycles. Encouragingly, in a full cell paired with commercial LiFePO 4 , it delivers a stable capacity of 102 mAh g −1 at 1C over 20 cycles, preliminarily confirming its compatibility with practical battery configurations. This work offers new ideas for designing high‐performance, fast‐charging LIB anodes with real‐world applicability.