Optimization of CNT-induced Ni₉S₈ nanoplates for balanced charge-transfer kinetics and conductivity in high-performance battery-type supercapacitors.
- 1Centre of Excellence in Solid State Physics, University of the Punjab Lahore-54590 Pakistan [email protected].
- 2King Abdullah Institute for Nanotechnology, King Saud University Riyadh 11451 Saudi Arabia.
- 3School of Physical Sciences and Technology, Northwestern Polytechnical University Xi'an Shaanxi 710129 China.
Abstract
The growing need for sustainable and eco-friendly energy solutions has intensified the efforts to develop advanced electrode materials with superior electrochemical traits. In this study, we synthesized Ni₉S₈ (NS), and its carbon nanotube (CNT) based composites containing 3, 6, and 9% CNTs (NS-3, NS-6, and NS-9) for supercapacitor applications. NS exhibited an initial plate-like morphology, which transformed into a CNT-entangled structure in composites. NS-6 showed an increased surface area of 61.72 m² g⁻¹, reflecting the coexistence of both micro and mesopores. Cyclic voltammetry revealed well-defined redox peaks across multiple scans, signifying a hybrid charge storage behavior, as validated through Dunn's model analysis. Among all composites, NS-6 showed the best electrochemical performance, achieving a specific capacity of 1382.47 C g⁻¹ at 2.0 A g⁻¹ and excellent cyclic stability with 95.5% retention after 10 000 cycles. The composite also presented enhanced ionic conductivity (4.4 × 10⁻² S cm⁻¹), reduced charge transfer resistance (2.51 Ω), and a diffusion coefficient of 7.48 × 10⁻¹¹ cm² s⁻¹. Based on these optimized results for NS-6, an asymmetric device was assembled, delivering 301.11 C g⁻¹, an energy density of 50.18 Wh kg⁻¹, and a power density of 705.88 W kg⁻¹. These results highlight NS-6 as a leading contender for efficient electrode materials for future energy solutions.
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BibTeX
@article{luqman2026optimization,
title = {{Optimization of CNT-induced Ni₉S₈ nanoplates for balanced charge-transfer kinetics and conductivity in high-performance battery-type supercapacitors.}},
author = {Muhammad Luqman and Muhammad Mehak and Mohammad Saqib Hassan and Farwa Tariq and Muhammad Ali Shar and Waqas Mahmood and Shahid Atiq},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra06316k},
url = {https://europepmc.org/article/MED/42835964},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Optimization of CNT-induced Ni₉S₈ nanoplates for balanced charge-transfer kinetics and conductivity in high-performance battery-type supercapacitors.
AU - Muhammad Luqman
AU - Muhammad Mehak
AU - Mohammad Saqib Hassan
AU - Farwa Tariq
AU - Muhammad Ali Shar
AU - Waqas Mahmood
AU - Shahid Atiq
PY - 2026
DA - 2026/10/05
JO - RSC advances
DO - 10.1039/d6ra06316k
UR - https://europepmc.org/article/MED/42835964
AB - The growing need for sustainable and eco-friendly energy solutions has intensified the efforts to develop advanced electrode materials with superior electrochemical traits. In this study, we synthesized Ni₉S₈ (NS), and its carbon nanotube (CNT) based composites containing 3, 6, and 9% CNTs (NS-3, NS-6, and NS-9) for supercapacitor applications. NS exhibited an initial plate-like morphology, which transformed into a CNT-entangled structure in composites. NS-6 showed an increased surface area of 61.72 m² g⁻¹, reflecting the coexistence of both micro and mesopores. Cyclic voltammetry revealed well-defined redox peaks across multiple scans, signifying a hybrid charge storage behavior, as validated through Dunn's model analysis. Among all composites, NS-6 showed the best electrochemical performance, achieving a specific capacity of 1382.47 C g⁻¹ at 2.0 A g⁻¹ and excellent cyclic stability with 95.5% retention after 10 000 cycles. The composite also presented enhanced ionic conductivity (4.4 × 10⁻² S cm⁻¹), reduced charge transfer resistance (2.51 Ω), and a diffusion coefficient of 7.48 × 10⁻¹¹ cm² s⁻¹. Based on these optimized results for NS-6, an asymmetric device was assembled, delivering 301.11 C g⁻¹, an energy density of 50.18 Wh kg⁻¹, and a power density of 705.88 W kg⁻¹. These results highlight NS-6 as a leading contender for efficient electrode materials for future energy solutions.
SN - 2046-2069
ER -