Synthesis of Defective-Structure Li4Mn5O12by Combustion Method and Its Application to Hybrid Capacitor

Kim, Hun-Uk; Sun, Yang‐Kook; Lee, Bum-Suk; Jin, Chang-Soo; Shin, Kyoung-Hee

doi:10.5229/jkes.2010.13.2.103

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The waxberry-like nanosphere Li4Mn5O12 consists of many small Li4Mn5O12 balls that have unsmooth surfaces and multiple pores-the result corresponds to the SEM image above. It is worth noting that the morphologies of waxberry-like nanosphere and raspberry-like nanosphere Li4Mn5O12 had not been attained by the simple methods reported before [1,16,[21][22][23][24][25]. The distribution of elements in the material is characterized by mapping, which was shown in Figure S1.…”

Section: Characterization and Measurementmentioning

confidence: 98%

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Zhang

Wang

et al. 2018

JLPEA

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Porous materials have superior electrochemical performance owing to its their structure, which could increase the specific and contact area with the electrode. The spinel Li 4 Mn 5 O 12 has a three-dimensional tunnel structure for a better diffusion path, which has the advantage of lithium ion insertion and extraction in the framework. However, multi-space spherical materials with single morphologies are rarely studied. In this work, waxberry-like and raspberry-like nanospheres for Li 4 Mn 5 O 12 have been fabricated by the wet chemistry and solid-state methods for the first time. The diameter of a single waxberry-and raspberry-like nanosphere is about 1 µm and 600 nm, respectively. The specific capacitance of Li 4 Mn 5 O 12 was 535 mF cm −2 and 147.25 F g −1 at the scan rate of 2 mV s −1 , and the energy density was 110.7 Wh kg −1 , remaining at 70% after 5000th charge-discharge cycles. Compared with raspberry-like nanosphere Li 4 Mn 5 O 12 , the waxberry-like nanoporous spinel Li 4 Mn 5 O 12 shows the better electrochemical performance and stability; furthermore, these electrochemical performances have been improved greatly compared to the previous studies. All these results indicate that the waxberry-like nanoporous spinel Li 4 Mn 5 O 12 could provide a potential application in high performance supercapacitors.

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Section: Characterization and Measurementmentioning

confidence: 98%

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Zhang

Wang

et al. 2018

JLPEA

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“…However, the perovskite oxides synthesized via solid-state reactions and sol-gel methods exhibit low specific surface areas due to a high calcination temperature of 1073-1173 K, inducing particle agglomeration [29][30][31]. In recent years, several research groups have reported that transition metal oxides containing small particle sizes and high specific areas can be fabricated via low-temperature heat treatment, resulting in excellent electrochemical properties and structural stability [32][33][34]. Crystalline particles with high purity and uniform crystal size can be obtained via hydrothermal synthesis.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Three-Dimensional Perovskite NiMnO3 Oxide and Application in Supercapacitor Electrode

et al. 2019

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Supercapacitors are attractive as a major energy storage device due to their high coulombic efficiency and semi-permanent life cycle. Transition metal oxides are used as electrode material in supercapacitors due to their high conductivity, capacitance, and multiple oxidation states. Nanopowder transition metal oxides exhibit low specific surface area, ion diffusion, electrical conductivity, and structural stability compared with the three-dimensional (3D) structure. Furthermore, unstable performance during long-term testing can occur via structural transition. Therefore, it is necessary to synthesize a transition metal oxide with a high specific surface area and a stable structure for supercapacitor application. Transition metal oxides with a perovskite structure control structural transition and improve conductivity. In this study, a NiMnO3 perovskite oxide with a high specific surface area and electrochemical properties was obtained via hydrothermal synthesis at low temperature. Hydrothermal synthesis was used to fabricate materials with an aqueous solution under high temperature and pressure. The shape and composition were regulated by controlling the hydrothermal synthesis reaction temperature and time. The synthesis of NiMnO3 was controlled by the reaction time to alter the specific surface area and morphology. The prepared perovskite NiMnO3 oxide with a three-dimensional structure can be used as an active electrode material for supercapacitors and electrochemical catalysts. The prepared NiMnO3 perovskite oxide showed a high specific capacitance of 99.03 F·g−1 and excellent cycle stability with a coulombic efficiency of 77% even after 7000 cycles.

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“…[1][2][3][4][5] 1) Therefore, we expect that it is possible to synthesize at low temperature for short time as well as Li 2 Mn 3 O 7 is also possible to use cathode material in hybrid capacitor. Hence, hybrid capacitor using Li 2 Mn 3 O 7 has been studied, yet.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Li₂Mn₃O₇and Application to Hybrid Capacitor

Kim¹,

Shin²,

Lee³

et al. 2010

Journal of Electrochemical Science and Technology

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:In order to apply hybrid capacitor, Li 2 Mn 3 O 7 was synthesized by combustion method using LiNO 3 , Li(CH 3 COO)·2H 2 O and Mn(CH 3 COO) 2 ·4H 2 O. Spinel pattern was identified the samples calcined over 400 o C in XRD. Intensity of Mn 2 O 3 peak increased as the calcination temperature increased. To decide n/p ratio and to investigate electrochemical properties, charge-discharge tests of Li/ Li 2 Mn 3 O 7 and Li/AC half-cell were carried out. Applying to AC/Li 2 Mn 3 O 7 hybrid capacitor, it had high discharge capacitance of 32.8 F/cc at 100 mA/g.

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Synthesis of Defective-Structure Li₄Mn₅O₁₂by Combustion Method and Its Application to Hybrid Capacitor

Cited by 3 publications

References 16 publications

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Hydrothermal Synthesis of Three-Dimensional Perovskite NiMnO3 Oxide and Application in Supercapacitor Electrode

Synthesis of Li₂Mn₃O₇and Application to Hybrid Capacitor

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Synthesis of Defective-Structure Li4Mn5O12by Combustion Method and Its Application to Hybrid Capacitor

Cited by 3 publications

References 16 publications

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Hydrothermal Synthesis of Three-Dimensional Perovskite NiMnO3 Oxide and Application in Supercapacitor Electrode

Synthesis of Li2Mn3O7and Application to Hybrid Capacitor

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Synthesis of Defective-Structure Li₄Mn₅O₁₂by Combustion Method and Its Application to Hybrid Capacitor

Synthesis of Li₂Mn₃O₇and Application to Hybrid Capacitor