A morphology, porosity and surface conductive layer optimized MnCo2O4 microsphere for compatible superior Li+ ion/air rechargeable battery electrode materials

Yun, Young Soo; Kim, Jin Kyu; Ju, Ji Young; Unithrattil, Sanjith; Lee, Su Yeon; Kang, Yongku; Jung, Ha‐Kyun; Park, Jin‐Seong; Im, Won Bin; Choi, Sungho

doi:10.1039/c5dt04975j

Cited by 16 publications

(13 citation statements)

References 29 publications

(25 reference statements)

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“…Figure a and b shows the first 5 CV curves of the MCO and NMCO samples, respectively in the potential window of 0–3.0 V at a scan rate of 0.5 mV s −1 . For MCO, in the first cathodic sweep (Figure a), a broad peak appears at 1.2 and sharp reduction peak at 0.8 V, corresponding to the decomposition and reduction of MnCo 2 O 4 to metallic manganese and cobalt, the electrochemical formation of amorphous Li 2 O and a passivating SEI film . During the subsequent anodic scan, two peaks are located at 1.65 V and 2.05 V, which are ascribed to the oxidation of Mn to Mn 2+ and Co to Co 2+ .…”

Section: Resultsmentioning

confidence: 60%

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Nanowires of Ni Substituted MnCo₂O₄as an Anode Material for High Performance Lithium-ion Battery

et al. 2017

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We have demonstrated, the synthesis of Ni substituted Manganese Cobalt Oxide Mn 1-x Ni x Co 2 O 4 (x = 0, 0.6) (NMCO) nanowires by facile hydrothermal technique as an anode material for Li-ion batteries. The morphological features by FESEM reveal the formation of 3D microcube like structure for pure MnCo 2 O 4 (MCO). Interestingly, it was found that 3D microcube structure of MCO transform into 1D nanowires with Ni substitution. When evaluated as an anode material for lithium ion batteries, NMCO electrode exhibited outstanding electro-chemical performance i. e., an almost 98 % capacity retention of 706 mAh g À 1 , even after 200 cycles at applied current density of 500 mA g À1 . Importantly, a high discharge capacity of 474 mAh g À 1 is maintained at the very high rate of 10 Ag À1 . The excellent anode performance of NMCO system ascribed to high open porosity which provides access to electrolyte and Li-ions for effective electrochemical reaction. More significantly, better performance of nanowires is attributed to the shortening of diffusion path of electrons and Lithium ion transport.

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Section: Resultsmentioning

confidence: 60%

“…However, the NMCO nanowire electrode reveals admirable cyclability of 98 % specific capacity retention over 200 cycles. Significantly, among both samples, the NMCO sample confer the utmost reversible capacity and much better than earlier reports . It reveals the good stability ofstructure and good electrochemical Li + insertion/extraction.…”

Section: Resultsmentioning

confidence: 99%

Nanowires of Ni Substituted MnCo₂O₄as an Anode Material for High Performance Lithium-ion Battery

et al. 2017

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“…The need for free‐standing carbon‐free electrodes for LOB encouraged the exploration of materials, previously used as catalysts . Several approaches have been proposed to narrow the gap toward a feasible LOB, namely metals and/or transition metal compounds (TMC – oxides, carbides, and nitrides).…”

Section: Toward Carbon‐free Air Electrodesmentioning

confidence: 99%

“…While porous structure can alleviate oxygen and Li + diffusion and increase the active surface area for ORR, low electronic conductivity and poor diffusion of active species lead to poor rate capabilities. The last has been often alleviated in LOBs by additional conductive substrates, special nano‐scale architectures (microspheres, nanoparticles, web‐like, nanowires, scale‐ and rod‐like, nanorods, etc.) of binary metal oxides, and surface alterations .…”

Section: Toward Carbon‐free Air Electrodesmentioning

confidence: 99%

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

Balaish

Jung

Kim

et al. 2019

Adv Funct Materials

147

100

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This review reports on the most updated technological aspects of Li-air battery cathode materials. It provides the reader with recent developments, alongside critical views. The requirements for air-cathodes, as well as the classification and characterization of carbon-based and carbon-free air cathodes, are listed. The effects of two major substituent groups of materials, namely carbon and advanced materials (metals, metal-oxides, metal-carbides, and metal-nitrides) aimed at replacing carbon, are discussed in terms of their chemical and electrochemical stability. The report covers aspects of surface chemistry and structure influence on the electrolyte and discharge products stability. The review also reports on the efforts to suppress side reactions and deterioration of the polymeric binders (if a composite electrode is being considered). This is recognized as a means to enhance Li-air battery performance. The report concludes with an outlook and perspective, providing the readers with some insight on other factors and their impact on the long road toward a viable air-cathode suitable for Li-air battery operations.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201808303.respectively. [1] The configuration of an aprotic LOB is based on coupling lithium metal anode and air-breathing cathode in a non-aqueous electrolyte system. The electrochemical reactions occurring during discharge are complex multistep reactions and may involve dissolved and/or adsorbed species alongside parasitic reactions. [2][3][4][5] Oxygen reduction reaction during discharge largely depends on the cathode and electrolytes characteristics; yet, a dominant process involving a two-electron oxygen reduction reaction (ORR), with the formation of Li 2 O 2 , is reported, according to the following reaction [6] The reverse process, namely lithium peroxide oxidation, occurs upon charging. The formation/decomposition of Li 2 O 2 during discharge/charge is often accompanied by parasitic side reactions, due to instability of the major battery components (cathode, electrolyte, and anode) under operating conditions. [7][8][9][10][11][12] While lithium metal anode corrosion can be mitigated by a protective solid electrolyte (SE) membrane, [13][14][15] the electrolyte and cathode are considered as the most challenging components of LOB. Much efforts have been placed on understanding the role of the electrolyte, its degradation, on Li-O 2 reaction mechanism and battery performance. [16][17][18][19][20] Nonetheless, the high discharge/ charge overpotential and severe capacity loss in the course of cycling are also largely related to the air-breathing cathode. A stable, high surface area, cost-efficient air-electrode with excellent catalytic activities toward oxygen reduction and oxidation is crucial for the development of practical LOB. Cathode materials should be stable, durable, and hold interfaces with minimum surface oxide layers, which can inhibit charge transfer during the charging p...

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“…Moreover, Kim et al also reported that MnCo 2 O 4 nanowires anchored on rGO nanosheets could significantly improve the discharge specific capacity, rate capability, and cycle life when they were severed as cathodic materials for Li–O 2 battery . More recently, carbon layer coated MnCo 2 O 4 multiporous microspheres were prepared by a simple co‐preciptation and subsequent hydrothermal method, and this hybrid promoted the electrochemical reaction of the oxygen cathode and achieved a remarkable cyclic stability.…”

Section: Manganese‐based Composite Oxidesmentioning

confidence: 99%

Advances in Manganese‐Based Oxides Cathodic Electrocatalysts for Li–Air Batteries

Bao

Sun

Liu

et al. 2018

Adv Funct Materials

132

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Li-air batteries, characteristic of superhigh theoretical specific energy density, cost-efficiency, and environment-friendly merits, have aroused ever-increasing attention. Nevertheless, relatively low Coulomb efficiency, severe potential hysteresis, and poor rate capability, which mainly result from sluggish oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) kinetics, as well as pitiful cycle stability caused by parasitic reactions, extremely limit their practical applications. Manganese (Mn)-based oxides and their composites can exhibit high ORR and OER activities, reduce charge/discharge overpotential, and improve the cycling stability when used as cathodic catalyst materials. Herein, energy storage mechanisms for Li-air batteries are summarized, followed by a systematic overview of the progress of manganesebased oxides (MnO 2 with different crystal structures, MnO, MnOOH, Mn 2 O 3 , Mn 3 O 4 , MnOx, perovskite-type and spinel-type manganese oxides, etc.) cathodic materials for Li-air batteries in the recent years. The focus lies on the effects of crystal structure, design strategy, chemical composition, and microscopic physical parameters on ORR and OER activities of variousMn-based oxides, and even the overall performance of Li-air batteries. Finally, a prospect of the research for Mn-based oxides cathodic catalysts in the future is made, and some new insights for more reasonable design of Mn-based oxides electrocatalysts with higher catalytic efficiency are provided.

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A morphology, porosity and surface conductive layer optimized MnCo₂O₄ microsphere for compatible superior Li⁺ ion/air rechargeable battery electrode materials

Cited by 16 publications

References 29 publications

Nanowires of Ni Substituted MnCo₂O₄as an Anode Material for High Performance Lithium-ion Battery

Nanowires of Ni Substituted MnCo₂O₄as an Anode Material for High Performance Lithium-ion Battery

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

Advances in Manganese‐Based Oxides Cathodic Electrocatalysts for Li–Air Batteries

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A morphology, porosity and surface conductive layer optimized MnCo2O4 microsphere for compatible superior Li+ ion/air rechargeable battery electrode materials

Cited by 16 publications

References 29 publications

Nanowires of Ni Substituted MnCo2O4as an Anode Material for High Performance Lithium-ion Battery

Nanowires of Ni Substituted MnCo2O4as an Anode Material for High Performance Lithium-ion Battery

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O2 Batteries

Advances in Manganese‐Based Oxides Cathodic Electrocatalysts for Li–Air Batteries

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A morphology, porosity and surface conductive layer optimized MnCo₂O₄ microsphere for compatible superior Li⁺ ion/air rechargeable battery electrode materials

Nanowires of Ni Substituted MnCo₂O₄as an Anode Material for High Performance Lithium-ion Battery

Nanowires of Ni Substituted MnCo₂O₄as an Anode Material for High Performance Lithium-ion Battery

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries