Facile synthesis of hierarchically porous NiO micro-tubes as advanced anode materials for lithium-ion batteries

Abstract

Hierarchically porous NiO microtubes are synthesized by a hightemperature calcination of Ni(dmg) 2 microtubes obtained by a simple precipitation method. The porous NiO microtubes as an anode material for lithium ion batteries exhibit excellent performances, $640 mA h g À1 after 200 cycles at 1 A g À1 .

Three-dimensional ZnMn2O4/porous carbon framework from petroleum asphalt for high performance lithium-ion battery

“…During the first cathodic scan, the peak around 1.25 V, which vanishes afterwards, can be ascribed to the reduction process of Mn 3+ to Mn 2+ [19]. The weak reduction peak centered at 0.75 V might be assigned to the formation of the solid electrolyte interface (SEI) layer as a result of irreversible decomposition of the electrolyte, and the peak also vanishes during the second cycle [17]. (Fig.…”

“…In these studies, porous carbon as a support plays a key role in relaxing stress as well as preventing the aggregation and pulverization of metal oxide nanoparticles. Electroactive ZnMn 2 O 4 as electrode material for LIBs has attracted much attention, owing to its high theoretical capacity (784 mAh g -1 ) and low oxidation (delithiation) potentials of manganese (1.5 V) and zinc (1.2 V), ultimately increasing the output voltage of LIBs [14][15][16][17][18][19]. Besides, other advantages including environmental friendliness and low cost of Petroleum asphalt, as a by-product of vacuum distillation of crude oil, has been mainly applied as fuel or binder in road construction and roofing field, owing to its reliable adhesion to other materials and viscoelastic properties [22].…”

Facile fabrication of hierarchically porous NiO microspheres as anode materials for lithium ion batteries

“…One effective strategy is designing NiO with unique nanostructures, such as hollow structures and porous materials, in which free space can accommodate the huge volume expansion and facilitate Li ? ion diffusion simultaneously and quickly throughout the entire electrode during the charge/discharge processes [16,17]. For example, NiO hollow structures obtained through calcination of the NiCl 2 /RF gel in argon and subsequently in oxygen exhibited a good cycling performance and rate capability [18].…”

Synthesis of hierarchical NiO microsphere with waxberry-like structure and its enhanced lithium storage performance

“…Unfortunately, as the common features of the TMOs, NiO also suffers from drastic volume change and severe capacity fading during battery cycling through conversion reaction. In order to improve the electrochemical lithium storage properties of NiO material for practical application, NiO material with various morphologies and nanostructures have been synthesized, such as plate structures [12], nanofibers [5,7], nanotubes [13,14], nanowall array [15], nanosheet networks [10], hollow microspheres [8,9], urchin-like microspheres [11,16] and flower-like microspheres [16e18]. NiO materials with hierarchical porous structure have many intriguing advantages in charge/discharge process, for instance, it can provide a stable structure for lithium ions embedding and guarantee stable cycle ability, it has relatively larger surface area convenient for the contact with electrolyte and the diffusion of lithium ion and electrons to benefit for rate capacity [19].…”