Co‐Co₃O₄ Embedded in Carbon Nanotube Derived from a Zeolitic‐Imidazolate Framework as Anode Material for Lithium‐Ion Batteries

Abstract

Co and carbon nanotube (CNT) were prepared as anode materials to be used in lithium rechargeable batteries from the zeolitic‐imidazolate framework‐67 (ZIF‐67) using the solvothermal method. By annealing ZIF‐67 at different temperatures between 400 and 700 °C, the carbon framework was changed to CNTs, and Co or Co3O4 nanoparticles were embedded in the CNTs (Co or Co3O4/CNT). The Co/CNT was converted to Co‐Co3O4/CNT by further treatment at 160 °C in air. The Co3O4/CNT showed high initial capacities (1582 mAh/g) but poor capacity retention during cycling. However, the air treatment of the Co/CNT at 160 °C enhanced its discharge capacity (935 mAh/g) and capacity retention during cycling.

Recent progress in Co‐free, Ni‐rich cathode materials for lithium‐ion batteries

“…[1][2][3][4] Lithium-ion batteries (LIBs) are in enormous demand in many applications such as vehicle transportation, stationary energy storage, portable electronics, and large-scale energy systems. [5][6][7][8][9][10][11][12][13][14][15] The attractive applications of LIBs are mainly due to their superior energy density and longer service life, [16][17][18][19][20][21] and these properties are dependent on the electrochemical performance of the cathode electrode material. [22][23][24] The cathode electrode design must account for material cost, safety, and structural stability capabilities, and it can be used to create promising high-performance LIBs.…”

“…The development of eco‐friendly energy storage devices is urgently required due to the continuous depletion of fossil fuels, environmental pressures, and the deepening global economic crisis 1–4 . Lithium‐ion batteries (LIBs) are in enormous demand in many applications such as vehicle transportation, stationary energy storage, portable electronics, and large‐scale energy systems 5–15 . The attractive applications of LIBs are mainly due to their superior energy density and longer service life, 16–21 and these properties are dependent on the electrochemical performance of the cathode electrode material 22–24 .…”

High-performance electrode of ZIF-67 metal-organic framework (MOF) loaded laser-induced graphene (LIG) composite for all-solid-state supercapacitor

“…Owing to the distinguished characteristics of large specific surface area, porous morphology, customizable structure and high chemical stability, MOF has gradually demonstrated its advantages in the field of energy storge [11,12]. Among them, zeolitic imidazolate frameworks (ZIFs) is a kind of representative MOF material, which is formed by the combination of metal ions and imidazole ligands, possessing easy-to-synthesize feature [13][14][15]. The ZIFs contain abundant carbon, nitrogen sites, and metal ions, resulting in a high electrochemical activity [16].…”