Han Weihao, Xiao Yao, Yin Jinpeng, Gong Yumei, Tuo Xiaohang, Cao Jincheng
School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
Department of Materials, Dalian Maritime University, Dalian 116026, China.
Langmuir. 2020 Sep 29;36(38):11237-11244. doi: 10.1021/acs.langmuir.0c01399. Epub 2020 Sep 18.
FeO@CNF anode material for Li-ion batteries (LIBs) was designed and fabricated using lyotropic cellulose acetate as the carbon nanofiber (CNF) phase and Fe(acac) as the FeO phase through the electrospinning approach. Because the CNFs could retard the change of FeO volume during the electrochemical cycling and improve the electrical conductivity and the introduction of FeO could offer a larger specific surface area and more mesopores to promote electrolyte penetration and Li diffusion, the FeO@CNFs electrode showed high reversible capacities (RCs) of 773.6 and 596.5 mAh g after 300 cycles and capacity residuals of 98.0 and 99.0% at high current densities 1 and 2 A g, respectively. This simple method to fabricate FeO@CNFs composite as anode material can be widely applied to fabricate metal oxides and bio-carbon composite nanofibers for high-performance energy storage materials.
采用溶致性醋酸纤维素作为碳纳米纤维（CNF）相，乙酰丙酮铁（Fe(acac)）作为FeO相，通过静电纺丝法设计并制备了用于锂离子电池（LIBs）的FeO@CNF负极材料。由于碳纳米纤维可以抑制电化学循环过程中FeO体积的变化并提高电导率，而FeO的引入可以提供更大的比表面积和更多的中孔以促进电解质渗透和锂扩散，因此FeO@CNF电极在300次循环后显示出773.6和596.5 mAh g的高可逆容量（RCs），在1和2 A g的高电流密度下容量保持率分别为98.0%和99.0%。这种制备FeO@CNF复合材料作为负极材料的简单方法可广泛应用于制备用于高性能储能材料的金属氧化物和生物碳复合纳米纤维。
