Controlled synthesis of spindle-like CoNi2S4 as electrode material for aqueous energy storage application
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY(2024)
摘要
Rational structural design is an important method to control conductivity and enhance the electrochemical performance. In this work, a spindle-like CoNi2S4 is prepared by a simple hydrothermal technique. XRD and SEM tests indicate the spindle shape of CoNi2S4. TEM measurement further implies the hollow structure, which can effectively shorten electron/ion transfer distance and improve conductivity. Electrochemical analysis demonstrates that the CoNi2S4 exhibits a specific capacitance of 1326.2 F g(-1) at 1 A g(-1); the CoNi2S4//AC also shows high specific capacitance (96.48 F g(-1) at 0.2 A g(-1)) and cycling durability with nearly no capacitance retention after 10,000 cycles. Furthermore, in Ni-Zn battery application field, the CoNi2S4//Zn also displays satisfying specific capacity (156.7 mAh g(-1) at 0.5 A g(-1)) and cycle durability (similar to 60.3 % capacity retention after 1500 cycles). The above results imply that CoNi2S4 is a promising electrode candidate in energy storage field.
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关键词
Spindle-like,Supercapacitors,Ni-Zn battery
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