Sign in Subscribe
Capacitors

Breakthrough in Nanotechnology: Researchers Develop High-Energy Ammonium-Ion Supercapacitor

Strategic Insights

— 1 min read

Nanotechnology researchers from Xiamen University have made significant advancements in the development of a high-energy ammonium-ion supercapacitor. The innovative device utilizes a composite material comprising ultra-thin polyaniline coating cerium dioxide nanorods, providing a specific capacitance of 842 F g-1 at a current density of 1 A g-1 and achieving an energy density of 174.60 Wh kg-1. This breakthrough has the potential to revolutionize the field of energy storage.

Key Takeaways:

  • Researchers from Xiamen University have developed a high-energy ammonium-ion supercapacitor using a composite material based on ultra-thin polyaniline coating cerium dioxide nanorods.
  • The device exhibits a specific capacitance of 842 F g-1 at a current density of 1 A g-1 and an energy density of 174.60 Wh kg-1.
  • The supercapacitor has a power density of 740.34 W kg-1 and achieves capacitance retention of 83.14% and coulombic efficiency of 98% after 1000 cycles.
  • The scientists employed charge storage mechanism and electrochemical impedance spectroscopy (EIS) at different potentials to understand the mechanism of NH4+ on the electrode surface and structural changes of the electrode material during charging and discharging.
  • The innovative device has practical application value and demonstrates significant potential for use in energy storage systems.
  • Additional authors for this research include Rong Jia, Hanzhong Ren, Yizhang Yang, Hucheng Fu, Rentong Qin, Qiuyan Luo, Weiang Luo, Conghui Yuan, Guorong Chen, Xinyu Liu, and Lizong Dai.

Statistics:

  • Specific capacitance: 842 F g-1
  • Current density: 1 A g-1
  • Energy density: 174.60 Wh kg-1
  • Power density: 740.34 W kg-1
  • Capacitance retention: 83.14%
  • Coulombic efficiency: 98%
  • Cyclability: 1000 cycles

Sources:

  • NewsRx. Reports from Xiamen University Add New Data to Findings in Nanorods (Ceo2@polyaniline Nanorods for Aqueous Ammonium-ion Supercapacitors With Ultra-high Energy Density). Nanotechnology Weekly. October 20, 2025; p 1471.
  • Journal of Energy Storage, 2025; 132.

Read more