Details

Autor(en) / Beteiligte

• Liu, Qi
• Mao, Chenghui
• Li, Guochang
• Zeng, Yu
• Zhou, Changkai
• Gong, Qinghua
• Yang, Lijun
• Wang, Xizhang
• Wu, Qiang
• Hu, Zheng

Titel

Collapsed N&S dual-doped carbon nanocages as high-density anode for ultrahigh volumetric performance of Li-ion batteries

Ist Teil von

• FlatChem, 2024-05, Vol.45, Article 100647

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The collapsed N&S dual-doped carbon nanocages by capillarity compression exhibits ultrahigh volumetric performance for compact LIBs owing to the high-density, abundant N&S sites, excellent wettability and enlarged interlayer distance. [Display omitted] •cNSCNC with high-density but porous structure is conveniently constructed.•Superior volumetric performance of LIBs is obtained.•Li-ion storage and diffusion mechanism is proposed. Compact lithium-ion batteries for miniaturized devices require high-volumetric-performance anodes. Either the graphite with high density or the porous nanocarbons with high gravimetric performance is limited in volumetric performance. Herein, we construct a series of anode materials, i.e. the collapsed carbon nanocages with different dopants, by capillarity compression, which achieves a high density of ∼0.97 g cm−3 but remains abundant micropores with increased active sites and enlarged interlayer distance. The N&S dual-doping redistributes the charges of sp2 carbon to an optimal status, leading to the high Li-ion capacity, meanwhile facilitates the wettability at the electrode/electrolyte interface, leading to the enhanced Li-ion diffusion coefficient. Accordingly, the collapsed N&S dual-doped carbon nanocages (cNSCNC) anode exhibits a record-high volumetric capacity of 1578 mAh cm−3 at 0.1 A g−1, excellent rate capability and cycling stability, thus achieving an ultrahigh volumetric energy density of 1087 Wh L−1 at 120 W L−1 for the cNSCNC//LiFePO4 full cell.