One‐Step Pyro‐Synthesis of a Nanostructured Mn₃O₄/C Electrode with Long Cycle Stability for Rechargeable Lithium‐Ion Batteries

Abstract

A nanostructured Mn O /C electrode was prepared by a one-step polyol-assisted pyro-synthesis without any post-heat treatments. The as-prepared Mn O /C revealed nanostructured morphology comprised of secondary aggregates formed from carbon-coated primary particles of average diameters ranging between 20 and 40 nm, as evidenced from the electron microscopy studies. The N adsorption studies reveal a hierarchical porous feature in the nanostructured electrode. The nanostructured morphology appears to be related to the present rapid combustion strategy. The nanostructured porous Mn O /C electrode demonstrated impressive electrode properties with reversible capacities of 666 mAh g at a current density of 33 mA g , good capacity retentions (1141 mAh g with 100 % Coulombic efficiencies at the 100 cycle), and rate capabilities (307 and 202 mAh g at 528 and 1056 mA g , respectively) when tested as an anode for lithium-ion battery applications.

Simultaneous Enhancement of the Performance and Stability of MnO2 Based Lithium Ion Battery Anodes by Compositing with Fluorine Terminated Functionalized Graphene Oxide

“…surface passivation layer) and/or the kinetically driven polymeric gel‐like films especially on the hierarchically designed electrode materials . Among all the factors including phase and/or morphology transition in the electrode and corresponding charges in electrode/electrolyte interface property that leads to such cycling behavior, we believe this behavior is similar to the stability behaviors of other nanoparticle composite‐based electrodes presented in other references . However, while they have reported the gradually increased capacity retention with cycles using the various electrode materials, the exact mechanism of such an enhancement still remains unclear with limited qualitative analysis.…”

Embedding MnO2 Ultrafine Nanoparticles within Graphene‐Based Hybrid Elastomer as an Anode for Enhanced Lithium Storage

“…The discharge and charge capacities in the first cycle were 1663 mA h g −1 and 1020 mA h g −1 , respectively, resulting in an initial Coulombic efficiency (CE) of 61.3 %. The irreversible capacity is mainly caused by the decomposition of electrolyte and the formation of SEI film during the first electrochemical reaction ,,. The distinct capacity decrease is only perceived in the first discharge process, and the following discharge profiles from 2nd to 100th are almost the same, showing a good reversibility.…”

Hierarchy Design in Metal Oxides as Anodes for Advanced Lithium‐Ion Batteries

“…Manganese oxide (MnO x ) materials based on conversion reaction are promising as anode materials because of their high theoretical capacities (MnO 2 : 1232 mAh g −1 , Mn 2 O 3 : 1018 mAh g −1 , Mn 3 O 4 :937 mAh g −1 , MnO: 755 mAh g −1 ), relatively low conversion potential, small voltage hysteresis, abundance, and environmental friendliness . However, the low electrical conductivity and large volume change during the reaction process result in poor rate performance and cycle life.…”