Abstract
The design of electrodes with a unique structure has a major impact on boosting the electrochemical performance for lithium-ion batteries. Herein, the SnSe/CoSe@C composite was synthesized by a facile metal–organic framework-engaged method. The carbon layer can improve the stability and conductivity of materials. In addition, SnSe/CoSe heterojunctions can increase the electron transfer rate between interfaces, which will be instrumental in inducing fast electronic/ionic diffusion kinetics. The SnSe/CoSe@C anode retained a high specific capacity of 789 mAh/g at 200 mA/g after 100 cycles. This anode still delivered high capacities of 425 mAh/g at 3000 mA/g.
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