Hierarchical Porous Carbonized Co3O4 Inverse Opals via Combined Block Copolymer and Colloid Templating as Bifunctional Electrocatalysts in Li–O2 Battery

Cho, Seol A.; Jang, Yu Jin; Lim, Hee‐Dae; Lee, Ji Eun; Jang, Yoon Hee; Trang, Nguyen Thi Hong; Mota, Filipe Marques; Fenning, David P.; Kang, Kisuk; Shao‐Horn, Yang; Kim, Dong Ha

doi:10.1002/aenm.201700391

Cited by 71 publications

(42 citation statements)

References 68 publications

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“…When used in Li‐air battery assemblies, a discharge capacity as high as 3660 mA h g −1 could be achieved, and the energy density showed a very high average value of 1350 Wh Kg −1 during 110 cycles. Similar effects could be found in composites of δ‐MnO 2 and Co 3 O 4 with other carbon materials . Also the loading of electrocatalysts on carbon supports has a major influence on the battery performance.…”

Section: Metal Oxide/carbon Hybridssupporting

confidence: 67%

Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries

Pan

Tian

Zaman

et al. 2018

Batteries & Supercaps

183

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In recent years, rechargeable Li-air and Zn-air batteries have attracted wide attention due to their high theoretical specific energy densities. However, the high cost and poor stability of noble metal catalysts for the oxygen redox reactions limit their practical large-scale application. On contrast, low-cost transition metal oxide (TMO)-based composite materials exhibit considerable bifunctional activity for oxygen reduction and oxygen evolution, and excellent stability, which holds great potential over the precious metal-based catalysts. This work briefly introduces the recent advances in TMO-based composites as bifunctional oxygen electrocatalysts for Li-air and Zn-air batteries. After a brief introduction into the research field of air batteries, metal oxides (including Co-and Mn-based oxides) and polymetallic oxides (mainly spinel and perovskite types) are reviewed. In consideration of the poor electronic conductivity of metal oxide catalysts, composites including additional conductive materials are also introduced. Finally, challenges and perspectives of bifunctional TMOs are emphasized to stimulate innovations for the future development of practical Li-air and Zn-air batteries.[a] Dr.

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Section: Metal Oxide/carbon Hybridssupporting

confidence: 67%

Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries

Pan

Tian

Zaman

et al. 2018

Batteries & Supercaps

183

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“…The superior potassium storage properties of s‐KFMO particles in this study can be attributed to the enhanced kinetics of K‐ion intercalation/deintercalation and minimization of side reactions, due to its uniform hierarchical microsphere structure. First, the primary nanoparticles can provide stable K + and electron transport pathways; therefore maximize the utilization of the active materials . Second, the microsize of microsphere structure can effectively buffer the mechanical stress caused by K‐ion intercalation/deintercalation and minimize the contacting area of the electroactive materials with electrolyte, thus preventing pulverization and reducing unwanted side reactions and therefore leading to improvement of structural stability and cycling stability …”

Section: Resultsmentioning

confidence: 99%

Layered P2‐Type K_0.65Fe_0.5Mn_0.5O₂ Microspheres as Superior Cathode for High‐Energy Potassium‐Ion Batteries

Deng

Fan

Chen

et al. 2018

Adv Funct Materials

167

119

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Potassium-ion batteries have been regarded as the potential alternatives to lithium-ion batteries (LIBs) due to the low cost, earth abundance, and low potential of K (−2.936 vs standard hydrogen electrode (SHE)). However, the lack of low-cost cathodes with high energy density and long cycle life always limits its application. In this work, high-energy layered P2-type hierarchical K 0.65 Fe 0.5 Mn 0.5 O 2 (P2-KFMO) microspheres, assembled by the primary nanoparticles, are fabricated via a modified solvent-thermal method. Benefiting from the unique microspheres with primary nanoparticles, the K + intercalation/deintercalation kinetics of P2-KFMO is greatly enhanced with a stabilized cathodic electrolyte interphase on the cathode. The P2-KFMO microsphere presents a highly reversible potassium storage capacity of 151 mAh g −1 at 20 mA g −1 , fast rate capability of 103 mAh g −1 at 100 mA g −1 , and long cycling stability with 78% capacity retention after 350 cycles. A full cell with P2-KFMO microspheres as cathode and hard carbon as anode is constructed, which exhibits long-term cycling stability (>80% of retention after 100 cycles). The present high-performance P2-KFMO microsphere cathode synthesized using earth-abundant elements provides a new cost-effective alternative to LIBs for large-scale energy storage.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10. 1002/adfm.201800219. in vain due to the limited and unevenly distributed Li sources. [2] In addition, the rapid expansion of renewable energy market from wind, solar, hydropower, and other intermittent energy sources has also triggered growing demand for high-energy density and low-cost energy storage systems, which further stimulated broad investigation beyond the Li-ion battery technologies. [3][4][5] Among these technologies, sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) are the two most promising alternatives to LIBs due to the earth-abundance and accessibility of Na and K compared with Li. [3][4][5][6][7][8] Statistically, K and Na elements remarkably occupy 2.09 and 2.3 wt% of the earth's crust (vs 0.0017% of Li) respectively. [3,9] However, since K has lower standard redox potential (−2.936 V vs standard hydrogen electrode (SHE)) than Na (−2.714 V), and is close to Li's potential (−3.040 V), a higher operating voltage, thus a high energy density could be delivered for PIBs, which seems to be a more attractive choice as affordable replacement of LIBs as large-scale energy storage system. [4,6,7] Extensive efforts have been devoted to explore high capacity PIB anode and significant advances have been achieved in high performance anode materials. [10][11][12][13][14][15][16][17][18][19] Among them, the carbonaceous materials (graphite, [10,13,14] hard/soft carbon, [12,13] and graphene [18] ) and metal (antimony, [19] tin [15] ) and metal oxides (K 2 Ti 4 O 9 ) [17] show very promising performance. Different from the wide range of options on anode materials, only a limited number...

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“…They reported that when Co 3 O 4 nanoparticles were used as a catalyst, Co 2+ ions dissolved from cobalt oxide were impregnated into Li 2 O 2 to form Li 2–2x Co x O 2 . This idea was supported by subsequent research papers reporting the enhanced electrochemical performance of Co 3 O 4 ‐embedded Li−O 2 batteries . The conversion of Li 2 O 2 with metal‐ and metal‐oxide‐based catalysts has also been suggested to increase the oxidation kinetics of Li 2 O 2 .…”

Section: Bifunctional Catalysts For Non‐aqueous Li−o2 Batteriesmentioning

confidence: 76%

Bifunctional Oxygen Electrocatalysts for Lithium−Oxygen Batteries

Bae

Park

et al. 2019

Batteries & Supercaps

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LithiumÀoxygen batteries have attracted great attention over the last few decades owing to their extraordinarily high theoretical energy density, which can potentially exceed that of current state-of-art lithium-ion batteries. However, lithiumÀoxygen batteries exhibit poor cycle stability, relatively low power capability and significantly large polarizations for both, the oxygen reduction reaction (ORR, discharge) and the oxygen evolution reaction (OER, charge). To address these issues, various catalysts for aqueous and non-aqueous lithiumÀoxygen batteries have thus been introduced, and some recent developments of bifunctional catalysts could simultaneously facilitate the ORR and OER, leading to great advance-ments in the overall battery performance. Herein, we present a brief overview of recent progress in the development of bifunctional catalysts for lithiumÀoxygen batteries based on the current understanding of their working mechanism. Perovskitetype, spinel-type, and non-oxide catalysts and their use in aqueous lithiumÀoxygen batteries are reviewed. Recently reported bifunctional catalysts in non-aqueous lithiumÀoxygen batteries are also introduced, and the different roles of solidand soluble-type catalysts are further discussed. Finally, we conclude by deliberating the design prospects and perspectives for efficient bifunctional catalysts for future lithiumÀoxygen batteries.

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Hierarchical Porous Carbonized Co₃O₄ Inverse Opals via Combined Block Copolymer and Colloid Templating as Bifunctional Electrocatalysts in Li–O₂ Battery

Cited by 71 publications

References 68 publications

Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries

Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries

Layered P2‐Type K_0.65Fe_0.5Mn_0.5O₂ Microspheres as Superior Cathode for High‐Energy Potassium‐Ion Batteries

Bifunctional Oxygen Electrocatalysts for Lithium−Oxygen Batteries

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Hierarchical Porous Carbonized Co3O4 Inverse Opals via Combined Block Copolymer and Colloid Templating as Bifunctional Electrocatalysts in Li–O2 Battery

Cited by 71 publications

References 68 publications

Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries

Recent Progress on Transition Metal Oxides as Bifunctional Catalysts for Lithium‐Air and Zinc‐Air Batteries

Layered P2‐Type K0.65Fe0.5Mn0.5O2 Microspheres as Superior Cathode for High‐Energy Potassium‐Ion Batteries

Bifunctional Oxygen Electrocatalysts for Lithium−Oxygen Batteries

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Hierarchical Porous Carbonized Co₃O₄ Inverse Opals via Combined Block Copolymer and Colloid Templating as Bifunctional Electrocatalysts in Li–O₂ Battery

Layered P2‐Type K_0.65Fe_0.5Mn_0.5O₂ Microspheres as Superior Cathode for High‐Energy Potassium‐Ion Batteries