Solvothermal Fabrication of Hollow Nanobarrel‐Like ZnCo₂O₄ Towards Enhancing the Electrochemical Performance of Rechargeable Lithium‐Ion Batteries

Abstract

Hollow nanobarrel‐like ZnCo2O4 has been designed and synthesized by means of a simple solvothermal method and subsequent calcination. The obtained samples were systematically characterized by powder X‐ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high‐resolution transmission electron microscopy (HRTEM), N2 adsorption–desorption experiments and X‐ray photoelectron spectroscopy (XPS). This hollow structure could not only relieve the volume expansion effect, but also facilitate the diffusion of lithium ions. We obtained a reversible lithium storage capacity of 1350 mAh g−1 even after 300 cycles at a current density of 500 mA g−1 with a voltage window of 0.01–3.0 V. As‐prepared samples demonstrate the high reversible capacity and excellent cycle life. The good cycling capability and high rate performance suggest that the material will be an attractive anode material for lithium‐ion batteries.

ZnS Nanotubes/Carbon Cloth as a Reversible and High‐Capacity Anode Material for Lithium‐Ion Batteries

“…Confronted with the increasing environmental pollution and exponential consumption of fossil fuels worldwide, clean and renewable energy and their storage devices are urgently sought after . In this regard, lithium‐ion batteries have gained tremendous attention due to its remarkable properties such as large energy density and environmental friendliness . Previously, Graphite has been extensively explored as a potential candidate for the anode of lithium‐ion batteries, due to its excellent conductivity.…”

Self‐Assembled Porous NiFe2O4 Floral Microspheres Inlaid on Ultrathin Flake Graphite as Anode Materials for Lithium Ion Batteries

“…Transition metal oxides, including binary and ternary metal oxides, have been widely studied as LIBs electrode materials . Generally ferrite oxides with special spinel structure have recently come into sharp focus by virtue of its essential attributes, such as abundant nature storage, low toxicity and low cost ,.…”

“…[12][13][14][15][16][17][18] Transition metal oxides, including binary and ternary metal oxides, have been widely studied as LIBs electrode materials. [19][20][21][22] Generally ferrite oxides with special spinel structure have recently come into sharp focus by virtue of its essential attributes, such as abundant nature storage, low toxicity and low cost. [23,24] Comparing with various ferrites, NiFe 2 O 4 whose structure is defined to be inverse spinel, namely while all Ni 2 + and half Fe 3 + occupy the whole octahedral sites, another half Fe 3 + occupy the tetrahedral sites, shows more reactive sites with lithium ions during electrochemical process in compared with general spinels in terms of previous report by Chen et al [25,26] And both of this unique crystal form and the reaction mechanism in which Fe 3+ [27][28][29][30] Besides, NiFe 2 O 4 possesses high theoretical capacity (915 mAh g À1 ).…”

Self Assembled Rice Ball‐Like ZnCo2O4 Inlaid on rGO as Flexible Anodes with High Lithium Storage Capability and Superior Cycling Stability

“…The 1st discharge/charge capacities are 963.9 and 711.5 mAh g −1 with a coulombic efficiency of 73.8 %. The irreversible capacity loss in the initial cycle may be related to the decomposition of electrolyte and the formation of solid electrolyte interphase (SEI) layer . In the subsequent cycles, the electrode exhibited outstanding reversible discharge/charge capacities such as 1041.3 and 1038.8 mAh g −1 at 300th and 908.7 and 907.6 mAh g −1 at 500th.…”