Enhanced Potassium-Ion Storage of the 3D Carbon Superstructure by Manipulating the Nitrogen-Doped Species and Morphology.

ABSTRACT: Potassium-ion batteries (PIBs) are attractive for grid-scale energy storage due to the abundant potassium resource and high energy density. The key to achieving high-performance and large-scale energy storage technology lies in seeking eco-efficient synthetic processes to the design of suitable anode materials. Herein, a spherical sponge-like carbon superstructure (NCS) assembled by 2D nanosheets is rationally and efficiently designed for K⁺ storage. The optimized NCS electrode exhibits an outstanding rate capability, high reversible specific capacity (250 mAh g^-1 at 200 mA g^-1 after 300 cycles), and promising cycling performance (205 mAh g^-1 at 1000 mA g^-1 after 2000 cycles). The superior performance can be attributed to the unique ro

SUBMITTER: Li Y 

PROVIDER: S-EPMC8187550 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature