Magnetic tubular carbon nanofibers as anode electrodes for high‐performance lithium‐ion batteries

Abstract

Summary Novel magnetic tubular carbon nanofibers (MTCFs) are prepared through the combination technique of hypercrosslinking, control extraction, and carbonization. The diameter of MTCFs is mainly concentrated between 90 and 120 nm, and the average tube diameter is about 30 nm. A trace amount of Fe3O4 exists inside the MTCFs with a particle size of 3 nm, which is formed by in situ conversion of the catalyst (FeCl3) for the hypercrosslinking reaction. The MTCFs with high surface area (448.74 m2 g−1) and porous wall are used as anode material for lithium‐ion batteries. The electrochemical properties of MTCFs are compared, and tubular carbon nanofibers (TCFs) prepared by the complete extraction. Electrochemical analysis shows that the introduction of Fe3O4 nanoparticles makes MTCFs have higher reversible capacity and better rate performance. MTCFs exhibit high reversible specific capacity of 1011.7 mAh g−1 after 150 cycles at current density of 100 mA g−1. Even at high current density of 3000 mA g−1, a remarkable reversible capacity of 270.0 mAh g−1 is still delivered. Thus, the novel MTCFs show potential application value in anode material for high‐performance lithium‐ion battery.

Tailoring carboxyl tubular carbon nanofibers/MnO2 composites for high‐performance lithium‐ion battery anodes

“…All chemicals were analytically pure without further purification. Tubular carbon nanofibers (TCFs) were prepared by combining Friedel‐Crafts alkylation reaction and calcination techniques, as described in our previously reported work 31,32 . The surface modification of TCFs was carried out by using HNO 3 /H 2 O mixed solution.…”

A novel flower‐like metal‐based oxides with cross‐linked networks for rapid lithium‐ion storage

“…Along with the improvement of economy and growing requirements of people, the developments of high‐performance nonrenewable energy resources are more and more urgent and eager, such as alkaline‐ion batteries, fuel cell, and supercapacitors . Among them, lithium‐ion batteries (LIBs) still occupy the dominant energy conversion and storage positions all over the world on account of the wide voltage windows, ultrahigh power density, and long cyclic life, which are widely applied for portable electronic units and mobile communication equipments . Nevertheless, the traditional LIBs cannot satisfy people's growing requirements on account of the fast capacity decay after repeated charging and discharging.…”

“…[1][2][3][4] Among them, lithium-ion batteries (LIBs) still occupy the dominant energy conversion and storage positions all over the world on account of the wide voltage windows, ultrahigh power density, and long cyclic life, which are widely applied for portable electronic units and mobile communication equipments. 5,6 Nevertheless, the traditional LIBs cannot satisfy people's growing requirements on account of the fast capacity decay after repeated charging and discharging. In terms of electrodes, the commercial anode of graphite is subjected to its poor theoretical capacity (around 372 mAh/g) and sluggish intercalation kinetics upon rapid Li-ion transfer, which deeply limited the development of LIBs in novel and modern devices.…”

Cobalt‐based metal organic framework ( Co‐MOFs )/graphene oxide composites as high‐performance anode active materials for lithium‐ion batteries

“…Therefore, excellent anode material requires high specific capacity and cyclic stability. At present, ideal anode materials mainly include carbon, metal alloys and compounds 12‐17 . And it is the focus of current research to design anode active materials with novel structure and excellent performances.…”

“…At present, ideal anode materials mainly include carbon, metal alloys and compounds. [12][13][14][15][16][17] And it is the focus of current research to design anode active materials with novel structure and excellent performances. Hou et al 18 presented hollow TiO 2 sub-microspheres synthesized via a facile one-step, low temperature hydrothermal strategy.…”