A low-cost naphthaldiimide based organic cathode for rechargeable lithium-ion batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• The development of efficient cathode materials is crucial for advancing lithium-ion batteries (LIBs).
• Organic cathode materials offer advantages like light weight, low cost, and abundant resources compared to inorganic counterparts.
• Naphthaldiimide (NDI) derivatives are emerging as promising candidates for organic electrodes.

Purpose of the Study:

• To synthesize and evaluate a cost-efficient naphthaldiimide (NDI)-based derivative, NDI-NHOH, as an organic cathode material for LIBs.
• To investigate the electrochemical performance and stability of the NDI-NHOH composite cathode.
• To explore its potential for high-performance energy storage.

Main Methods:

• One-step synthesis of the NDI-NHOH derivative.
• Fabrication of a composite cathode using NDI-NHOH, acetylene black, and polyvinylidene fluoride (6:3:1 ratio).
• Electrochemical characterization including cyclic voltammetry (CV) and capacity retention tests in lithium-metal based LIBs.

Main Results:

• NDI-NHOH was synthesized with high thermal stability.
• The composite cathode exhibited reversible oxidation and reduction peaks at specific potentials (2.54, 3.22 V and 2.14, 2.32 V vs. Li+/Li).
• A specific capacity of approximately 80 mAh g-1 was achieved in the 1.5-3.5 V range, with 50% capacity retention over 20 cycles.

Conclusions:

• The synthesized NDI-NHOH derivative shows excellent thermal stability and versatile electrochemical properties.
• It demonstrates potential as an efficient organic cathode material for high-performance LIBs.
• This NDI-based compound represents a promising candidate for next-generation energy storage solutions.