Improved lithium-ion battery anode capacity with a network of easily fabricated spindle-like carbon nanofibers

Abstract

SummaryA novel network of spindle-like carbon nanofibers was fabricated via a simplified synthesis involving electrospinning followed by preoxidation in air and postcarbonization in Ar. Not only was the as-obtained carbon network comprised of beads of spindle-like nanofibers but the cubic MnO phase and N elements were successfully anchored into the amorphous carbon matrix. When directly used as a binder-free anode for lithium-ion batteries, the network showed excellent electrochemical performance with high capacity, good rate capacity and reliable cycling stability. Under a current density of 0.2 A g−1, it delivered a high reversible capacity of 875.5 mAh g−1 after 200 cycles and 1005.5 mAh g−1 after 250 cycles with a significant coulombic efficiency of 99.5%.

Synthesis and characterization of electrospun molybdenum dioxide–carbon nanofibers as sulfur matrix additives for rechargeable lithium–sulfur battery applications

“…However, since electrospinning is a simple and versatile method for producing fibers from a variety of materials on a large scale, it has attracted much attention in both research and commerce [ 24 ]. The nanofibers have extremely high specific surface area because of their small diameter and their porosity which exhibits excellent pore interconnectivity [ 25 – 26 ]. To the best of our knowledge, no articles related to using MoO 2 –CNFs as a sulfur matrix in Li–S batteries have been published so far.…”

Chemical vapor deposition-assisted fabrication of a graphene-wrapped MnO/carbon nanofibers membrane as a high-rate and long-life anode for lithium ion batteries

“…41,42 Additionally, aer the rst cycle, the redox peak intensities become stable, which indicate the highly reversible electrochemical reactions in the MnO/CNFs@G electrode and lead to the enhanced electrochemical processes. 43,44 Fig. 7b shows the Nyquist plots of MnO/CNFs@G and MnO/CNFs membranes electrode.…”

Well‐Designed Hierarchical Co3O4 Architecture as a Long‐Life and Ultrahigh Rate Capacity Anode for Advanced Lithium‐Ion Batteries

“…Among various transitional metal oxides (TMOs, TM = Ni, Fe, Mn, Co, etc. ) used as anode materials for next‐generation LIBs, tricobalt tetroxide (Co 3 O 4 ) has attracted special interest due to its high theoretical specific capacity of 890 mAh g −1 based on an eight‐electron electrochemical reaction (Co 3 O 4 + 8Li + 8e − ↔ 4Li 2 O + 3Co) . The discharge–charge processes involve reversible formation and decomposition of Li 2 O accompanying a reaction of metal Co. Like other TMOs, however, lithium storage performance of Co 3 O 4 is also impeded by the poor conductivity and large volume expansion or contraction during lithiation–delithiation cycles.…”