Porous carbon nanofiber electrode for capacitive deionization
Due to the relatively low specific surface area(SSA)of carbon nanofibers,their desalination efficiency in capacitive deionization(CDI)applications is not satisfactory.In this study,we prepared zeolitic imidazolate framework-8(ZIF-8)and polyacrylonitrile(PAN)composite nanofibers using electrospinning technology and obtained porous carbon nanofiber electrode materials through carbonization process.After optimizing the composition and carbonization process,the resulting carbon fiber electrode exhibited an SSA of 398.74 m2/g and a pore volume of 0.180 cm3/g,respectively.At voltages of 1.2 V and 1.6 V,the salt adsorption capacity of the electrode for a 500 mg/L NaCl solution(50 mL)reached 21.16 mg/g and 39.04 mg/g,respectively.Furthermore,electrochemical testing revealed that increasing the porosity of carbon nanofiber electrodes can improve the double-layer capacitance to a certain extent,thereby achieving higher ion adsorption capacity and more stable energy storage performance.
国家科技期刊平台
NSTL
万方数据
