1. In situ grown Na+-doped NH4V4O10 nano-arrays on carbon cloth with ultra-high specific capacity for high-performance aqueous ammonium ion hybrid supercapacitors.
- Author
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Zhou, Yangwang, Long, Fei, Hou, Yixin, Lin, Xinying, Sun, Li, Mo, Shuyi, and Gao, Yihua
- Abstract
Aqueous ammonium ion hybrid supercapacitors (A-HSCs) have sparked significant interest due to their safety, sustainability, and low cost. However, the quest for superior electrode materials for storing ammonium ions still encounters many challenges. Since layered vanadium-based materials usually have a high theoretical capacity and open crystal structure, and the introduction of sodium ions can enhance ionic bonds and cycle stability, this work reports a Na
+ -doped NH4 V4 O10 nano-array grown in situ on carbon cloth through a hydrothermal approach (NaNVO@CC), which serves as a novel cathode material for A-HSCs. The irreversible deammoniation reaction of NH4 V4 O10 was effectively inhibited due to the growth on the carbon cloth and the synergistic effect of Na+ . Thanks to these advantages, the NaNVO@CC cathode demonstrates outstanding electrochemical performance, achieving an ultra-high specific capacity of 712 F g−1 at 0.50 A g−1 and exceptional cycle stability, retaining 71.1% of its capacitance at 5.00 A g−1 over 20 000 cycles. The built A-HSC exhibits significant power density (8556.6 W kg−1 ), energy density (77.7 W h kg−1 ) and superior cycle life. This work proves the enormous potential of doping in enhancing electrode performance, which will offer insights for the creation of high-performance A-HSCs. [ABSTRACT FROM AUTHOR]- Published
- 2025
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