Facile Synthesis of Flowerlike LiFe₅O₈ Microspheres for Electrochemical Supercapacitors

Abstract

Facile synthesis of porous and hollow spinel materials is very urgent due to their extensive applications in the field of energy storage. In present work, flowerlike porous LiFeO microspheres etched for 15, 30, and 45 min (named as p-LFO-15, p-LFO-30, and p-LFO-45, respectively) are successfully synthesized through a facile chemical etching method based on bulk LiFeO (LFO) particles as precursors, and they are applied as electrode materials for high-performance electrochemical capacitors. In particular, the specific surface area of p-LFO-45 reaches 46.13 m g, which is 112 times greater than that of the unetched counterpart. Therefore, the p-LFO-45 electrode can achieve a higher capacitance of 278 F g at a scan rate of 5 mV s than the unetched counterpart. Furthermore, the p-LFO-45 electrode presents a good cycling stability with 78.3% of capacitive retention after 2000 cycles, which is much higher than that of the unetched LFO particles (66%). Therefore, the flowerlike porous LFO microspheres are very promising candidate materials for supercapacitor applications.

Controllable Synthesis, Core-Shell Nanostructures, and Supercapacitor Performance of Highly Uniform Polypyrrole/Polyaniline Nanospheres

“…For example, activated carbon, − carbon nanotubes, , graphene, , and their derivatives are usually used in electric double-layer supercapacitors (i.e., EDLCs). Metal oxides (manganese oxide and nickel oxide), , metal phosphoric acid, , metal nitrides, , metal sulfides, , and conducting polymers , are used in pesudocapacitors. Compared with EDLC-based capacitors, fast and reversible surface reactions in pseudocapacitors can provide higher specific capacitance (i.e., SC) for charge storage.…”

Low coercivity microwave ceramics based on LiZnMn ferrite synthesized via glycine-nitrate combustion

“…During the last few decades, the rapid development of microwave technologies has aroused an increased interest in classical high-frequency materials and imposed a new requirement on their electromagnetic parameters [1][2][3]. Some LiZnMn ferrites have been widely used in microwave devices due to their low coercive forces (H c ), high remanent and saturation magnetizations (M r and M s ), great mechanical and chemical stabilities, rectangular hysteresis loop, etc.…”

Synthesis and Characterization of Copper Doped Lithium Ferrite Nanocomposite

“…Spinel structures having normal spinel behavior and inverse spinel behavior [3]. Lithium ferrite is broadly used as magnetic material, and its nanoparticle was low-cost replacement to the garnet created materials for the microwave applications in the industries and is a hopeful applicant for cathode materials in support of rechargeable lithium ions batteries [4]. Copper ferrite (CuFe 2 O 4 ) were interested material because of their applications in highly developed technologies [5] and mainly used in technical applications like currency counting machine and memory core, etc., owing their numerous properties.…”