Solvent-Free Processed Cathode Slurry with Carbon Nanotube Conductors for Li-Ion Batteries

Abstract

The increase in demand for energy storage devices, including portable electronic devices, electronic mobile devices, and energy storage systems, has led to substantial growth in the market for Li-ion batteries (LiB). However, the resulting environmental concerns from the waste of LiB and pollutants from the manufacturing process have attracted considerable attention. In particular, N-methylpyrrolidone, which is utilized during the manufacturing process for preparing cathode or anode slurries, is a toxic organic pollutant. Therefore, the dry-based process for electrodes is of special interest nowadays. Herein, we report the fabrication of a cathode by a mortar-based dry process using NCM811, a carbon conductor, and poly(tetrafluoroethylene)binder. The electrochemical performance of the cathode was compared in terms of the types of conductors: carbon nanotubes and carbon black. The electrodes with carbon nanotubes showed an ameliorated performance in terms of cycle testing, capacity retention, and mechanical properties.

Towards greener batteries: sustainable components and materials for next-generation batteries

“…150,151 Dry processing is another alternative for cathode production, where materials are mixed in dry form, without solvents, and deposited on the current collector. 152,153 This promising approach addresses many issues related to solvent use and high energy consumption during drying/recovery. However, cathodes fabricated using dry processing currently do not provide satisfactory performance, especially at high C-rates.…”

A Polytetrafluoroethylene-Based Solvent-Free Procedure for the Manufacturing of Lithium-Ion Batteries

“…The SF batteries exhibited superior cycling stability because the carbon nanotubes could be used as a matrix to accommodate the LFP particles. In the same year, Gyori Park et al [112] used different conductive carbons (CNT and CB) to explore the corresponding battery performance, and they prepared NCM811, CNT, and CB with PTFE-based SF batteries. The final results showed that the carbon nanotube electrodes exhibited the best performance in terms of the cycle test, capacity retention, and mechanical properties.…”

Fluorescence Resonance Energy Transfer Study Between ZnS Quantum Dots and Fluoranthene

“…[11] By introducing different activating metal ions, it becomes possible to extensively tailor the luminescent properties of ZnS. [12][13][14][15] Although colloidal chemistry has played a crucial role in generating a wide range of uniform nanocrystal systems comprising both semiconductors [16] and metals, [17] the primary focus has often revolved around fine-tuning general experimental factors such as precursors, [18] ligands, [19] and reaction temperatures. [20] These adjustments, however, frequently give rise to challenges and demand additional size-selection procedures.…”