Comparison of oxidized carbon nanotubes for Li-ion storage capacity

Li‐ion batteries (LIB's) are of the greatest practical utility for portable electronics and electric vehicles (EV's). LIB energy, power and cycle life performances depend on cathode and anode compositions and morphology, electrolyte composition and the overall cell design. Electrode morphology is influenced by the shape and size of the active material (AM), conductive additive (CA) particles, the polymeric binder properties, and also on the AM/CA/binder mass ratio. At the same time, it also substantially depends on the electrode preparation process. This process is usually comprised of mixing a solvent, a binder, AM and CA powders, and casting the resulting slurry onto a current collector foil followed by a drying process. Whereas the problems of electrode morphology and their influence on the LIB‐electrode performance always receive a proper attention, the influence of slurry properties and slurry preparation techniques on the electrode morphology is often overlooked or at least underrated. The present work summarizes the current state‐of‐the‐art in the field of LIB‐electrode precursor slurries preparation, characterized by multicomponent compounds and large variations in sizes and shapes of the solid components. Approaches to LIB‐electrode slurry preparation are outlined and discussed in the context of the ultimate LIB‐electrode morphology and performance.

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Conveying Advanced Li‐ion Battery Materials into Practice The Impact of Electrode Slurry Preparation Skills

Kraytsberg

Ein‐Eli

2016

Advanced Energy Materials

213

165

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MnOx bound on oxidized multi-walled carbon nanotubes as anode for lithium-ion batteries

Guo

Sun²,

Ge³

et al. 2021

Chemical Engineering Journal

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Multi-functionalized herringbone carbon nanofiber for anodes of lithium ion batteries

Kim

Cho

Kim

et al. 2017

Phys. Chem. Chem. Phys.

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Herringbone carbon nanofibers (HCNFs) are prepared for use as anode materials in lithium-ion batteries (LIBs). HCNFs are prepared using a Ni-Fe catalyst and subsequently multi-functionalized with oxygen using the Hummers' method, and then with both oxygen and nitrogen-containing 2-ureido-4[1H]pyrimidinone (UHP) moieties, which endow the HCNFs with the ability to form quadruple hydrogen bonds (QHBs). The as-prepared HCNFs are, on average, 13 μm in length and 100 nm in diameter, with a highly graphitic structure. The oxidized HCNFs (Ox-HCNFs) obtained by Hummers' method are partially exfoliated, having double-bladed saw-like structures that extend in the direction of the graphite planes. QHBs are formed between the HCNFs after functionalization with the UHP moieties. The final surface-modified HCNFs (N-Ox-HCNFs) have more electrochemical sites, shorter Li diffusion lengths, and additional electron pathways compared with the as-prepared HCNF and Ox-HCNF. The introduction of oxygen- and nitrogen-containing functional groups improves the performance of LIBs: a high charge capacity of 763 mA h g at 0.1 A g, excellent rate capability (a capacity of 402 mA h g at 3 A g), and near 100% capacity retention after 300 cycles are reported.

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Comparison of oxidized carbon nanotubes for Li-ion storage capacity

Cited by 4 publications

References 24 publications

Conveying Advanced Li‐ion Battery Materials into Practice The Impact of Electrode Slurry Preparation Skills

Conveying Advanced Li‐ion Battery Materials into Practice The Impact of Electrode Slurry Preparation Skills

MnOx bound on oxidized multi-walled carbon nanotubes as anode for lithium-ion batteries

Multi-functionalized herringbone carbon nanofiber for anodes of lithium ion batteries

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