Dual-functional NiCo2S4 polyhedral architecture with superior electrochemical performance for supercapacitors and lithium-ion batteries

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（6）
• 页码范围: 443-451
• 页数: 9页
• 语种: 英文

摘要

Dual-functional NiCo2S4 polyhedral architectures with outstanding electrochemical performance for supercapacitors and lithium-ion batteries (LIBs) have been rationally designed and successfully synthesized by a hydrothermal method.The as-synthesized NiCo2S4 electrode for supercapacitor exhibits an outstanding specific capacitance of 1298 F g-1 at 1 A g-1 and an excellent rate capability of ～80.4％ at 20 A g-1.Besides,capacitance retention of 90.44％ is realized after 8000 cycles.In addition,the NiCo2S4 as anode in LIBs delivers high initial charge/discharge capacities of 807.6 and 972.8 mAh g-1 at 0.5 C as well as good rate capability.In view of these points,this work provides a feasible pathway for assembling electrodes and devices with excellent electrochemical properties in the next generation energy storage applications.