Graphene quantum dot-modified Co<sub>3</sub>O<sub>4</sub>/NiCo<sub>2</sub>O<sub>4</sub> yolk–shell polyhedrons as a polysulfide-adsorptive sulfur host for lithium–sulfur batteries
The shuttle effect of lithium polysulfides and non-ideal reaction kinetics restrict the development of high-energy-density lithium-sulfur (Li-S) batteries. Here, we report a graphene quantum dot (GQD)-modified Co<sub>3</sub>O<sub>4</sub>/NiCo<sub>2</sub>O<sub>4</sub> yolk-shell polyhedron as a sulfur host for Li-S batteries. GQDs shorten transport pathways of electrons, while strong binding of Co<sub>3</sub>O<sub>4</sub> and NiCo<sub>2</sub>O<sub>4</sub> to Li<sub>2</sub>S<sub>4</sub>, Li<sub>2</sub>S<sub>6</sub> and Li<sub>2</sub>S<sub>8</sub> are demonstrated from density functional theory calculations. Co<sub>3</sub>O<sub>4</sub>/NiCo<sub>2</sub>O<sub>4</sub>/GQDs@S shows a high capacity of 727 mA h g<sup>-1</sup> after 100 cycles, along with a well-recoverable rate performance. A good tolerance at low temperature of -5 °C is also achieved, enabling a potential for applications in various conditions.
Authors
- Yajun Zhu (ORCID: https://orcid.org/0000-0002-5672-4126)
- Kehao Tao
- Ting Zhou (ORCID: https://orcid.org/0000-0002-8475-5798)
- Jinyun Liu (ORCID: https://orcid.org/0000-0001-6619-3886)
- Jinjin Li (ORCID: https://orcid.org/0000-0003-4661-4051)
- Jing Xu (ORCID: https://orcid.org/0009-0002-5968-1704)
- Xiaofei Huang (ORCID: https://orcid.org/0009-0006-8611-8553)
Institutions
- Shanghai Jiao Tong University (CN)
- Anhui Normal University (CN)
Publication Details
- Journal
- Chemical Communications
- Published
- 2024-12-30
- DOI
- https://doi.org/10.1039/d4cc05879h
- Citations
- 10
- Primary Topic
- Advanced Battery Materials and Technologies
- Type
- article
- Field-Weighted Citation Impact
- 2.09