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<p>Lithium-sulfur (Li-S) battery, as a promising next-generation high-energy-density battery, suffers from lithium polysulfides (LPSs) shuttle and Li dendrites issues. Porous crystalline framework-based membranes as separator can effectively absorb and restrain LPSs but without precise structural design principal exploration and mechanism studies. Herein, bio-inspired 1D oriented lithium-ion transport channels with molecular negatively charged <b>PO</b><sub><b>3</b></sub>(−1) have been developed in hybrid tetrazole frameworks for promoting the transmission of Li<sup>+</sup> ions. The theoretical calculations and <i>in situ</i> spectroscopy demonstrated the higher binding energy and inhibited diffusion of LPSs in <b>PO</b><sub><b>3</b></sub>. The assembled <b>PP@PO</b><sub><b>3</b></sub> Janus separator in Li-S coin cell delivered a high initial capacity of 1410.9 mAh g<sup>−1</sup> at 0.1 C and a low attenuation rate of 0.038% per cycle over 500 cycles at 5 C. Besides, the high capacities of 862, 542 and 409 mAh g<sup>−1</sup> based on high-sulfur-loading cathodes of 2.6, 3.8 and 5.0 mg cm<sup>−2</sup> at 0.5 C were achieved, respectively. Moreover, the punch battery of <b>PO</b><sub><b>3</b></sub><b>@PP</b> separator with S-cathode of 1.2 mg cm<sup>−2</sup> has been developed for demonstrating its potentials commercial application, which displays impressive capacity of 873.4 mAh g<sup>−1</sup> with the retention of ∼78.9% over 50 cycles.</p>

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Negative PO3-implanted bionic ion transport channels for promoting Li-S battery

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Wenhuan Huang,
  • Shun Wang,
  • Xuehan Hou,
  • Yanan Zhang,
  • Xingxing Zhang,
  • Yaoxiao Zhao,
  • Xilang Jin,
  • Huabin Zhang,
  • Fei Wang,
  • Jian Zhang

摘要

Lithium-sulfur (Li-S) battery, as a promising next-generation high-energy-density battery, suffers from lithium polysulfides (LPSs) shuttle and Li dendrites issues. Porous crystalline framework-based membranes as separator can effectively absorb and restrain LPSs but without precise structural design principal exploration and mechanism studies. Herein, bio-inspired 1D oriented lithium-ion transport channels with molecular negatively charged PO3(−1) have been developed in hybrid tetrazole frameworks for promoting the transmission of Li+ ions. The theoretical calculations and in situ spectroscopy demonstrated the higher binding energy and inhibited diffusion of LPSs in PO3. The assembled PP@PO3 Janus separator in Li-S coin cell delivered a high initial capacity of 1410.9 mAh g−1 at 0.1 C and a low attenuation rate of 0.038% per cycle over 500 cycles at 5 C. Besides, the high capacities of 862, 542 and 409 mAh g−1 based on high-sulfur-loading cathodes of 2.6, 3.8 and 5.0 mg cm−2 at 0.5 C were achieved, respectively. Moreover, the punch battery of PO3@PP separator with S-cathode of 1.2 mg cm−2 has been developed for demonstrating its potentials commercial application, which displays impressive capacity of 873.4 mAh g−1 with the retention of ∼78.9% over 50 cycles.