A Nitrogen‐Doped Manganese Oxide Nanoparticles/Porous Carbon Nanosheets Hybrid Material: A High‐Performance Anode for Lithium Ion Batteries

Abstract

A nitrogen‐doped MnO nanoparticles/ porous carbon nanosheets (N−MnO/PCS) composite was synthesized by the room‐temperature redox reaction between KMnO4 and PCS followed by a facile carbothermal reduction, and a subsequent coating process of urea onto MnO/PCS and heat treatment. N−MnO nanoparticles with a grain size of about 30 nm are homogenously embedded on the surface of the N−PCS, corresponding to a high loading of 50.09 wt.% in the resulting composite. Benefiting from the enhanced reaction kinetics as well as electrical conductivity and continuous transport pathways of Li+/electron resulting from the N‐doping and hybridization of the cross‐linked porous carbon substrate, the as‐synthesized N−MnO/PCS‐1 electrode delivers a large reversible specific capacity (1497.2 mA h g−1 at 100 mA g−1 after 160 cycles), outstanding rate capacities (710.6 mA h g−1 at 1 A g−1 and 640.1 mA h g−1 at 2 A g−1) and long‐term cycling stability with specific capacity (976 mA h g−1 at 0.5 A g−1 after cycling 300 cycles). The simple and green synthesis and electronic properties of this composite mean that it has great potential as a high‐capacity anode material for practical application in large‐scale energy storage devices.

In Situ Nitrogen‐Doping Carbon Aerogel as an Effective Sulfur Host to Immobilize Polysulfides for High Performance Lithium‐Sulfur Battery

“…These materials including cobalt nitride, [23] nitrogen-doped graphene [24] and nitrogen-doped carbon nanotubes [25] can provide abundant nitrogen active sites, improve battery performance and effectively promote the development of LSB. [26] Despite success in solving the problems, new strategies still need to be developed to control the microstructure and morphology of carbon materials. Considering compound with nitrogen can provide opportunity to inherit original nitrogen and facilitate the element doping more evenly distribution, special choice to compound may provide high content of nitrogen.…”

“…Moreover, nitrides were used to modify carbon materials for sulfur composite electrodes, and nitrogen‐doped carbon materials have attracted much attention in recent years. These materials including cobalt nitride, [23] nitrogen‐doped graphene [24] and nitrogen‐doped carbon nanotubes [25] can provide abundant nitrogen active sites, improve battery performance and effectively promote the development of LSB [26] . Despite success in solving the problems, new strategies still need to be developed to control the microstructure and morphology of carbon materials.…”