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<p>Photo-assisted capacitors are attractive devices for solar energy conversion and storage, while the behavior of photoelectrodes limits their performance. In this work, MoS<sub>2</sub> photoelectrodes were modified by g-C<sub>3</sub>N<sub>4</sub>, exhibiting enhanced photo-rechargeable properties. Our results show that the introduction of g-C<sub>3</sub>N<sub>4</sub> increases the surface area of MoS<sub>2</sub> photoelectrodes and promotes the transport of charge carriers, which can boost the specific capacity and cycle stability of capacitors. The as-prepared zinc-ion capacitors with g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> photoelectrodes show a specific capacity of 380.93 F/g at 1 A/g under AM 1.5 G illumination. Remarkably, after 3000 cycles at 10 A/g, the capacity of the photo-assisted zinc-ion capacitor retains above 99%.</p>

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g-C3N4 modified MoS2 photoelectrodes for stable photo-assisted zinc-ion capacitors

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Changhua Mi,
  • Xin Sun,
  • Xiaojing Yin,
  • Jiahao Yang,
  • Yanlong Lv,
  • Xiaojun Lv,
  • Meicheng Li

摘要

Photo-assisted capacitors are attractive devices for solar energy conversion and storage, while the behavior of photoelectrodes limits their performance. In this work, MoS2 photoelectrodes were modified by g-C3N4, exhibiting enhanced photo-rechargeable properties. Our results show that the introduction of g-C3N4 increases the surface area of MoS2 photoelectrodes and promotes the transport of charge carriers, which can boost the specific capacity and cycle stability of capacitors. The as-prepared zinc-ion capacitors with g-C3N4/MoS2 photoelectrodes show a specific capacity of 380.93 F/g at 1 A/g under AM 1.5 G illumination. Remarkably, after 3000 cycles at 10 A/g, the capacity of the photo-assisted zinc-ion capacitor retains above 99%.