Two-dimensional SnO₂ anchored biomass-derived carbon nanosheet anode for high-performance Li-ion capacitors.

ABSTRACT: Lithium-ion capacitors (LICs) combine the advantages of both batteries and supercapacitors; they have attracted intensive attention among energy conversion and storage fields, and one of the key points of their research is the exploration of suitable battery-type electrode materials. Herein, a simple and low-cost strategy is proposed, in which SnO₂ particles are anchored on the conductive porous carbon nano-sheets (PCN) derived from coffee grounds. This method can inhibit the grain coarsening of Sn and the volume change of SnO₂ effectively, thus improving the electrochemical reversibility of the materials. In the lithium half cell (0-3.0 V vs. Li/Li⁺), the as-prepared SnO₂/PCN electrode yields a reversible capacity of 799 mA h g^-1

SUBMITTER: Liu C 

PROVIDER: S-EPMC8695415 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature