Jump to main content
Jump to site search


Direct synthesis of 3D hierarchically porous carbon/Sn composites via in situ generated NaCl crystals as templates for potassium-ion batteries anode

Author affiliations

Abstract

It has been approved that embedding potassium ions into graphitic carbon interlayer is possible. The intercalation of potassium ions into graphite has been demonstrated feasible while the electrochemical performance of potassium ion battery (PIB) is still unsatisfying. Herein, an in situ formed NaCl serving as hierarchical templates and supporting the formation of 3D polymer–Sn complex is reported. The polymer–Sn complex is heat-treated to obtain a 3D Carbon/Sn network constructed by porous films. In particular, the large specific surface area of the composite and the Sn nanoparticles homogeneously embedded in 3D hierarchically porous carbon shells result in an excellent potassiation/depotassiation performance. Under the optimal conditions (650 °C), the 3D hierarchically porous carbon/Sn composite (3D-HPCS) as an anode material of PIBs demonstrates a high reversible capacity of 276.4 mA h g−1 at 50 mA g−1 (100 cycles) with coulombic efficiency of over 96%. This interesting method can provide new avenues to other high-capacity anode material systems that are subject to significant volume expansion.

Graphical abstract: Direct synthesis of 3D hierarchically porous carbon/Sn composites via in situ generated NaCl crystals as templates for potassium-ion batteries anode

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Sep 2017, accepted on 20 Nov 2017 and first published on 20 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA08171E
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

    Direct synthesis of 3D hierarchically porous carbon/Sn composites via in situ generated NaCl crystals as templates for potassium-ion batteries anode

    K. Huang, Z. Xing, L. Wang, X. Wu, W. Zhao, X. Qi, H. Wang and Z. Ju, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C7TA08171E

Search articles by author

Spotlight

Advertisements