Scholarlink

<p>In this work, we have synthesized gallium tungstate (Ga<sub>2</sub>(WO<sub>6</sub>)<sub>3</sub>) integrated with reduced graphene oxide (rGO) as an electrode material via an ultrasonication-assisted hydrothermal method and investigated for high-performance supercapacitor applications. The fabricated electrode materials were characterized by x-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and x-ray photoelectron spectroscopy (XPS). The results demonstrate the successful formation of a GaW/rGO nanocomposite with high crystallinity, uniform dispersion, and enhanced surface area. Electrochemical studies in a three-electrode configuration revealed significantly improved specific capacitance of 838&#xa0;F&#xa0;g<sup>−1</sup> at 1&#xa0;A&#xa0;g<sup>−1</sup> for Ga<sub>2</sub>(WO<sub>6</sub>)<sub>3</sub>/rGO, outperforming pristine Ga<sub>2</sub>(WO<sub>6</sub>)<sub>3</sub> (629&#xa0;F&#xa0;g<sup>−1</sup>). The composite also exhibited excellent rate capability and outstanding cyclic stability, with 91.2% retention over 10,000 cycles. When assembled as an asymmetric supercapacitor device using activated carbon (AC) as the negative electrode, the Ga<sub>2</sub>(WO<sub>6</sub>)<sub>3</sub>/rGO//AC cell achieved specific capacitance of 375&#xa0;F&#xa0;g<sup>−1</sup> at 1&#xa0;A&#xa0;g<sup>−1</sup>, retained 93.2% capacitance after 5000 cycles, and delivered maximum energy density of 29&#xa0;Wh&#xa0;kg<sup>−1</sup> at power density of 310&#xa0;W&#xa0;kg<sup>−1</sup>. The device also demonstrated practical applicability by powering a light-emitting diode (LED). The superior electrochemical performance is attributed to the synergistic effect between pseudocapacitive Ga<sub>2</sub>(WO<sub>6</sub>)<sub>3</sub> and highly conductive rGO, offering a promising route toward next-generation energy storage devices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Boosting the Pseudocapacitive Behavior of Ga2(WO6)3 Through rGO Hybridization for Efficient Supercapacitors

  • 期刊论文

  • 发表日期：

    2025年9月13日

查看全文
  • A. Saraswathi,
  • N. Shobanadevi,
  • Mahaboob Beevi Mohamed Yusuf,
  • R. Gandhi Raj

摘要

In this work, we have synthesized gallium tungstate (Ga2(WO6)3) integrated with reduced graphene oxide (rGO) as an electrode material via an ultrasonication-assisted hydrothermal method and investigated for high-performance supercapacitor applications. The fabricated electrode materials were characterized by x-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and x-ray photoelectron spectroscopy (XPS). The results demonstrate the successful formation of a GaW/rGO nanocomposite with high crystallinity, uniform dispersion, and enhanced surface area. Electrochemical studies in a three-electrode configuration revealed significantly improved specific capacitance of 838 F g−1 at 1 A g−1 for Ga2(WO6)3/rGO, outperforming pristine Ga2(WO6)3 (629 F g−1). The composite also exhibited excellent rate capability and outstanding cyclic stability, with 91.2% retention over 10,000 cycles. When assembled as an asymmetric supercapacitor device using activated carbon (AC) as the negative electrode, the Ga2(WO6)3/rGO//AC cell achieved specific capacitance of 375 F g−1 at 1 A g−1, retained 93.2% capacitance after 5000 cycles, and delivered maximum energy density of 29 Wh kg−1 at power density of 310 W kg−1. The device also demonstrated practical applicability by powering a light-emitting diode (LED). The superior electrochemical performance is attributed to the synergistic effect between pseudocapacitive Ga2(WO6)3 and highly conductive rGO, offering a promising route toward next-generation energy storage devices.