3D Grid of Carbon Tubes with Mn₃O₄‐NPs/CNTs Filled in their Inner Cavity as Ultrahigh‐Rate and Stable Lithium Anode

Abstract

Transition metal oxides are regarded as promising candidates of anode for next-generation lithium-ion batteries (LIBs) due to their ultrahigh theoretical capacity and low cost, but are restricted by their low conductivity and large volume expansion during Li + intercalation. Herein, we designed and constructed a structurally integrated 3D carbon tube (3D-CT) grid film with Mn 3 O 4 nanoparticles (Mn 3 O 4 -NPs) and carbon nanotubes (CNTs) filled in the inner cavity of CTs (denoted as Mn 3 O 4 -NPs/CNTs@3D-CT) as highperformance free-standing anode for LIBs. The Mn 3 O 4 -NPs/CNTs@3D-CT grid with Mn 3 O 4 -NPs filled in the inner cavity of 3D-CT not only afford sufficient space to overcome the damage caused by the volume expansion of Mn 3 O 4 -NPs during charge and discharge processes, but also achieves highly efficient channels for the fast transport of both electrons and Li + during cycling, thus offering outstanding electrochemical performance (865 mAh g −1 at 1 A g −1 after 300 cycles) and excellent rate capability (418 mAh g −1 at 4 A g −1 ) based on the total mass of electrode. The unique 3D-CT framework structure would open up a new route to the highly stable, high-capacity, and excellent cycle and high-rate performance free-standing electrodes for highperformance Li-ion storage.

ZIF-67 MOF-Derived Mn3O4 @ N-Doped C as a Supercapacitor Electrode in Different Alkaline Media

“…This makes it challenging to harness the material’s electrochemical potential. , Adding carbon nanofibers, graphene, carbon nanotubes, or amorphous carbon to Mn 3 O 4 electrodes has been shown to improve electron and ion mobility. High electron and ion-transfer efficiencies may be achieved by fabricating nanostructured Mn 3 O 4 materials, which improves electrochemical performance. − The majority of published ways to combine carbon with Mn 3 O 4 , however, need either lengthy processes or expensive carbon sources. − …”

A Quantitative Understanding of Electron and Mass Transport Coupling in Lithium–Oxygen Batteries

“…[4][5][6] LOBs are a promising and reliable alternative in terms of significant challenges in further increasing the specific energy of lithium ion batteries (LIBs). [7][8][9] A hopeful specific energy of 1200 Wh kg −1 based on the whole battery weight has been achieved by Samsung, [10,11] over four times that of LIBs. However, this technology still faces the formidable challenge of actual energy levels significantly deviating from the theoretical value.…”

FeNbO4 nanochains with a five-electron transfer reaction toward high capacity and fast Li storage

“…Transition metal oxides (TMOs) are preferred anode materials that can be served as a suitable substitute according to the different shortcomings of graphite. 7,8 Based on the reaction mechanism, TMOs can be broadly divided into two categories: intercalation materials and conversion materials. A typical intercalation TMO is Li 4 Ti 5 O 12 , which shows outstanding rate performance due to the rapid Li + ion transport.…”