Ultrafast Sulfur Redox Dynamics Enabled by a PPy@N‑TiO2 Z‑Scheme Heterojunction Photoelectrode for Photo‑Assisted Lithium–Sulfur Batteries (IMAGE)

Shanghai Jiao Tong University Journal Center

Ultrafast Sulfur Redox Dynamics Enabled by a PPy@N‑TiO2 Z‑Scheme Heterojunction Photoelectrode for Photo‑Assisted Lithium–Sulfur Batteries

Caption

  • A novel polymer–inorganic hybrid photoelectrode (PPy@N-TiO2/CC) with a Z-scheme heterostructure was first constructed for high-efficiency photo-assisted lithium–sulfur battery (PALSB).
  • PPy@N-TiO2/CC acts not only as a photocatalyst to accelerate sulfur redox reductions through photocatalytic, photoconductive, and photo-charge effects, but also as an electrocatalyst to facilitate intermediate polysulfide conversion.
  • PALSB achieves an ultrahigh discharge capacity of 1653 mAh g−1 and dual-mode energy harvesting: 5 h of photo-charging delivers a discharge capacity of 333 mAh g−1.

Credit

Fei Zhao, Yibo He*, Xuhong Li, Ke Yang, Shuo Chen, Yuanzhi Jiang, Xue-Sen Wang, Chunyuan Song, Xuqing Liu.

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CC BY-NC-ND

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