In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Abstract

The practical applications of Mn O in lithium-ion batteries are greatly hindered by fast capacity decay and poor rate performance as a result of significant volume changes and low electrical conductivity. It is believed that the synthesis of nanoscale Mn O combined with carbonaceous matrix will lead to a better electrochemical performance. Herein, a convenient route for the synthesis of Mn O nanoparticles grown in situ on hollow carbon nanofiber (denoted as HCF/Mn O ) is reported. The small size of Mn O particles combined with HCF can significantly alleviate volume changes and electrical conductivity; the strong chemical interactions between HCF and Mn O would improve the reversibility of the conversion reaction for MnO into Mn O and accelerate charge transfer. These features endow the HCF/Mn O composite with superior cycling stability and rate performance if used as the anode for lithium-ion batteries. The composite delivers a high discharge capacity of 835 mA h g after 100 cycles at 200 mA g , and 652 mA h g after 240 cycles at 1000 mA g . Even at 2000 mA g , it still shows a high capacity of 528 mA h g . The facile synthetic method and outstanding electrochemical performance of the as-prepared HCF/Mn O composite make it a promising candidate for a potential anode material for lithium-ion batteries.

Facile one step synthesis method of spinel LiMn2O4 cathode material for lithium batteries

“…As we mentioned above beside LiMn 2 O 4 other two oxides of manganese oxides (Mn 2 O 3 and Mn 3 O 4 ) were obtained. These lower oxides have application also as anode active materials in lithium ion batteries as reported previously [46, 47]. The successful synthesis of pure LiMn 2 O 4 in this study motivated us to investigate its electrochemical properties as cathode material in lithium ion batteries.…”

In situ synthesis of V2O3 nanorods anchored on reduced graphene oxide as high‐performance lithium ion battery anode

“…The high‐resolution C 1s spectrum in Figure b implies the presence of three different components at binding energies of 284.6 eV, 285.7 eV and 286.7 eV representing C−C, C−O, O‐C=O ,. Compared to GO, the intensity of C−C peak of V 2 O 3 /rGO composite increased clearly, while the intensity of C−O (285.7 eV) and O‐C=O (286.7 eV) decreased obviously, indicating that GO was reduced into rGO ,. This result is substantially coincident with XRD results.…”

“…Rechargeable lithium ion batteries, benefiting from high energy density, long cycle life, small memory effect and environment benignity, have been extensively investigated over the past decades and widely used in various energy storage devices including portable electronic devices and electric vehicles ,. Currently, graphite, the commercial anode material for LIBs, due to its low theoretical capacity (372 mA h g −1 ) and poor rate capability cannot keep pace with the ever‐increasing demand for next‐generation LIBs . To meet the enormous demands of energy consumptions, it is urgent to probe novel candidate to replace graphite anode.…”

Heat‐Treatment‐Assisted Molten‐Salt Strategy to Enhance Electrochemical Performances of Li‐Rich Assembled Microspheres by Tailoring Their Surface Features

“…As shown in Figure a, three components are distinguished in the C 1s spectra. The peaks at 284.8 and 286.4 eV are attributed to carbon of C−C and C‐O‐C, respectively, which come from additional graphite or hydrocarbon contaminants . The peak with binding energy between 288.0 and 290.0 eV is assigned to Li 2 CO 3 .…”

“…As shown in Figure 4a,t hree components are distinguished in the C1 ss pectra.T he peaks at 284.8 and 286.4 eV are attributed to carbon of CÀCa nd C-O-C, respectively,w hich come from additional graphite or hydrocarbon contaminants. [36,37] The peak with binding energy between 288.0 and 290.0 eV is assigned to Li 2 CO 3 . [38] The area of the Li 2 CO 3 peak for MS-LMRO and HA-MS-LMRO is much smaller than that of LMROa nd HA-LMRO, indicating that the MS process can effectively reduce the content of Li 2 CO 3 on the surfaceo ft he final sample.…”