Mesoporous Nitrogen-Doped Carbon MnO2 Multichannel Nanotubes with High Performance for Li-Ion Batteries

Wednesday, 12 October 2022: 10:40
Galleria 1 (The Hilton Atlanta)
Y. Dong (China University of Geosciences)
LIBs have been widely used in traffic applications in electric vehicles (EV), hybrid electric vehicles (HEV), and plugin hybrid electric vehicles (PHEV) to reduce environmental pollution.

Lack of suitable ion channels and low electronic conductivity hinder MnO2 as an anode material for lithium-ion batteries. Multiple ion channels rapidly and selectively gate ion transport to maintain superior energy storage. We report a mesoporous N-doped C modified MnO2 hollow nanotube with multiple Li-ion transport channels. When used as Li-ion batteries anode, due to multichannel ion transport of mesoporous N-doped C modified MnO2, the diffusion coefficient of Li+ reaches ~ 10−8 cm2 s−1. And the batteries show excellent specific capacity (as high as 468.4 mA h g−1 at 5 A g−1), superior rate capability (the current density from 100 A g−1 to 5 A g−1), good cycling ability (preserving ~92.5% capacity after 10000 cycles). Our multiple ion channels design contributes a novel idea for preparing outstanding comprehensive performance anode materials for lithium-ion batteries.