Integrated Design of Hierarchical CoSnO<sub>3</sub>@NC@MnO@NC Nanobox as Anode Material for Enhanced Lithium Storage Performance
Zhiwen Chen, Siming Fei, Chenghao Wu, Peijun Xin, Shoushuang Huang, Linnéa Selegård, Kajsa Uvdal, Zhangjun Hu
Abstract
and MnO efficiently increase the specific capacity. Notably, the dual-layer structure of N-doped carbons plays a critical functional role in the incorporated composites, where the inner layer serves as a reaction substrate and a spatial barrier and the outer layer offers electron conductivity, enabling more effective involvement of active anode materials in lithium storage, as well as maintaining their high activity during lithium cycling. Subsequently, the as-prepared CNMN exhibits a high specific capacity of 1195 mA h/g after the 200th cycle at 0.1C and an excellent stable reversible capacity of about 876 mA h/g after the 300th cycle at 0.5C with only 0.07 mA h/g fade per cycle after 300 cycles. Even after a 250 times fast charging/discharging cycle both at 5C, it still retains a reversible capacity of 422.6 mA h/g. We ascribe the enhanced lithium storage performances to the novel hierarchical architectures achieved from the rational design.