Potassium‐Based α‐Manganese Dioxide Nanofiber Binder‐Free Self‐Supporting Electrodes: A Design Strategy for High Energy Density Batteries

Poyraz, Altuğ S.; Bock, David C.; Zhu, Yimei; Marschilok, Amy C.; Takeuchi, Kenneth J.; Takeuchi, Esther S.

doi:10.1002/ente.201600128

Cited by 17 publications

(26 citation statements)

References 74 publications

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“…The spectrum of Au 4f in Figure 6E showed doublet peaks at 84.48 and 88.08 eV, confirming the presence of metallic Au(0) as the current collector. 55 Deconvolution of the O1s spectrum in Figure 6F 56,57 The spectrum of Mn 2p consisted of two distinct peaks at 642.58 and 657.28 eV, whose difference in binding energy was 11.7 eV, showing good agreement with previously reported values in the literature. 58 The electrochemical properties of the MnO 2 Aucotton electrodes were evaluated with a fixed size of electrodes with a 2 cm Â 1 cm active area, excluding the contact pad.…”

Section: Resultssupporting

confidence: 85%

Solution‐based deposition of nano‐embossed metal electrodes on cotton fabrics for wearable heaters and supercapacitors

Lee

Nam

et al. 2021

Intl J of Energy Research

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Cotton fabrics have received substantial attention as promising substrates for wearable electronics due to their large surface area and flexibility. Although the majority of studies have been devoted to fabricating electrodes utilizing cotton, the simple fabrication process of highly-conductive metal electrodes inserted in fabrics has yet to be achieved. Herein, we demonstrate the facile, electroless deposition of Au electrodes inserted in cotton by a seed-mediated, metal-growth strategy. The sequencable deposition of Au was achieved by the autocatalytic reduction of Au ions with Au nanoparticle seeds which were electrostatically deposited on cotton. The deposition efficiency was significantly improved by effectively removing physisorbed silane molecules on amine-modified cotton. The design was applied to various E-textiles, that is, wearable heaters, and energy storage devices. The cotton-based, wearable heater exhibited excellent Joule heating properties up to 120 C at 1 V within only 2 seconds. The wearable supercapacitor with cathode-deposited MnO 2 also demonstrated a promising, pseudo-capacitive performance of 167.55 F g À1 at 0.3 A g À1 .

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Section: Resultssupporting

confidence: 85%

Solution‐based deposition of nano‐embossed metal electrodes on cotton fabrics for wearable heaters and supercapacitors

Lee

Nam

et al. 2021

Intl J of Energy Research

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“…As previously stated, OMS-2 material is an environmentally benign and relatively cheap manganese oxide with a wide range of interesting applications in the fields of environmental and sustainable energy [55,[116][117][118][119][120], electrocatalysis and energy storage [121][122][123][124][125], as well as catalysis for fine chemistry [112,[126][127][128][129][130][131][132][133]. As previously indicated, the wide variety of structures that OMS-2 oxide can adopt makes it easy for these materials to adjust to each specific application.…”

Section: Assessment Of Doping Processesmentioning

confidence: 99%

Recent Manganese Oxide Octahedral Molecular Sieves (OMS–2) with Isomorphically Substituted Cationic Dopants and Their Catalytic Applications

Sabaté

Sabater

2021

Catalysts

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The present report describes the structural and physical–chemical variations of the potassium manganese oxide mineral, α–MnO2, which is a specific manganese octahedral molecular sieve (OMS) named cryptomelane (K–OMS–2), with different transition metal cations. We will describe some frequently used synthesis methods to obtain isomorphic substituted materials [M]–K–OMS–2 by replacing the original manganese cationic species in a controlled way. It is important to note that one of the main effects of doping is related to electronic environmental changes, as well as to an increase of oxygen species mobility, which is ultimately related to the creation of new vacancies. Given the interest and the importance of these materials, here, we collect the most recent advances in [M]–K–OMS–2 oxides (M = Ag, Ce, Mo, V, Nb, W, In, Zr and Ru) that have appeared in the literature during the last ten years, leaving aside other metal–doped [M]–K–OMS–2 oxides that have already been treated in previous reviews. Besides showing the most important structural and physic-chemical features of these oxides, we will highlight their applications in the field of degradation of pollutants, fine chemistry and electrocatalysis, and will suggest potential alternative applications.

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“…It is a multi-electron reaction with great potential for anode material [28]. The synthetic material K-OMS-2 has been designed to manufacture high-energy-density batteries [29,30].…”

Section: Crystal Structure Of the Mn Oxidementioning

confidence: 99%

Mineralogical Characterization of Manganese Oxide Minerals of the Devonian Xialei Manganese Deposit

et al. 2021

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The Guangxi Zhuang Autonomous Region is an important manganese ore district in Southwest China, with manganese ore resource reserves accounting for 23% of the total manganese ore resource reserves in China. The Xialei manganese deposit (Daxin County, Guangxi) is the first super-large manganese deposit discovered in China. The Mn oxide in the supergene oxidation zone of the Xialei deposit was characterized using scanning electron microscopy (SEM), energy spectrometer (EDS), transmission electron microscopy (TEM, HRTEM), and X-ray diffraction analysis (XRD). The Mn oxides have a gray-black/steel-gray color, a semi-metallic-earthy luster, and appear as oolitic, pisolitic, banded, massive, and cellular textures. Scanning electron microscopy images show that the manganese oxide minerals are present as fine-spherical particles with an earthy surface. TEM and HRTEM indicate the presence of oriented bundled and staggered nanorods, and nanopores between the crystals. The Mn oxide ore can be classified into two textural types: (1) oolitic and pisolitic (often with annuli) Mn oxide, and (2) massive Mn oxide. Pyrolusite, cryptomelane, and hollandite are the main Mn oxide minerals. The potassium contents of cryptomelane and pyrolusite are discussed. The unit cell parameters of pyrolusite are refined.

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Potassium‐Based α‐Manganese Dioxide Nanofiber Binder‐Free Self‐Supporting Electrodes: A Design Strategy for High Energy Density Batteries

Cited by 17 publications

References 74 publications

Solution‐based deposition of nano‐embossed metal electrodes on cotton fabrics for wearable heaters and supercapacitors

Solution‐based deposition of nano‐embossed metal electrodes on cotton fabrics for wearable heaters and supercapacitors

Recent Manganese Oxide Octahedral Molecular Sieves (OMS–2) with Isomorphically Substituted Cationic Dopants and Their Catalytic Applications

Mineralogical Characterization of Manganese Oxide Minerals of the Devonian Xialei Manganese Deposit

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