Array of nanosheets render ultrafast and high-capacity Na-ion storage by tunable pseudocapacitance

Dongliang Chao, Changrong Zhu, Peihua Yang, Xinhui Xia, Jilei Liu, Jin Wang, Xiaofeng Fan, Serguei V. Savilov, Jianyi Lin, Hong Jin Fan and Ze Xiang Shen ()
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Dongliang Chao: School of Physical and Mathematical Sciences, Nanyang Technological University
Changrong Zhu: School of Physical and Mathematical Sciences, Nanyang Technological University
Peihua Yang: School of Physical and Mathematical Sciences, Nanyang Technological University
Xinhui Xia: State Key Laboratory of Silicon Materials, Zhejiang University
Jilei Liu: School of Physical and Mathematical Sciences, Nanyang Technological University
Jin Wang: Energy Research Institute @ NTU, Nanyang Technological University
Xiaofeng Fan: College of Materials Science and Engineering, Jilin University
Serguei V. Savilov: Moscow State University
Jianyi Lin: Energy Research Institute @ NTU, Nanyang Technological University
Hong Jin Fan: School of Physical and Mathematical Sciences, Nanyang Technological University
Ze Xiang Shen: School of Physical and Mathematical Sciences, Nanyang Technological University

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Sodium-ion batteries are a potentially low-cost and safe alternative to the prevailing lithium-ion battery technology. However, it is a great challenge to achieve fast charging and high power density for most sodium-ion electrodes because of the sluggish sodiation kinetics. Here we demonstrate a high-capacity and high-rate sodium-ion anode based on ultrathin layered tin(II) sulfide nanostructures, in which a maximized extrinsic pseudocapacitance contribution is identified and verified by kinetics analysis. The graphene foam supported tin(II) sulfide nanoarray anode delivers a high reversible capacity of ∼1,100 mAh g−1 at 30 mA g−1 and ∼420 mAh g−1 at 30 A g−1, which even outperforms its lithium-ion storage performance. The surface-dominated redox reaction rendered by our tailored ultrathin tin(II) sulfide nanostructures may also work in other layered materials for high-performance sodium-ion storage.

Date: 2016
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DOI: 10.1038/ncomms12122

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