A novel zinc-ion hybrid supercapacitor for long-life and low-cost energy storage applications

By Heng Wang, Meng Wang, Yongbing Tang. Energy Storage Materials, 2018

491 citations recorded by the source corpus.

Abstract The development of multivalent cation based rechargeable devices have attracted increased interest because that one mole of multivalent ion can contribute double (for M2+) or triple (for M3+) electrons than monovalent ion (M+). Recently, multivalent cation based battery systems (e.g. Mg2+ and Al3+ batteries) have been widely investigated, however, less attention were paid on multivalent cation based supercapacitors and especially hybrid supercapacitors. Herein, we demonstrate a Zn-ion based hybrid supercapacitor (Zn-HSC) through directly designing Zn foil as both anode and current collector, and bio-carbon derived porous material as the cathode. The bivalent nature and high abundance of zinc can enable the Zn-HSC to achieve high energy density with low cost. After optimization, this Zn-HSC demonstrated superior electrochemical performances such as high discharge capacitance (170 F g−1 at 0.1 A g−1), good rate performance (~ 85% capacitance retention at 2 A g−1), high energy density (52.7 Wh kg−1 at 1725 W kg−1 based on the weight of active materials), and excellent cycling stability with 91% capacitance retention after 20,000 cycles at 2 A g−1.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/7c9cf6bbbf89d46833b8215f5e7f5f27f4cb4ed5

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