1
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Ghazanfari MR, Siemensmeyer K, Santhosh A, Vrijmoed JC, Tallu M, Dehnen S, Jerabek P, Thiele G. Low-Cost, Multifunctional, and Sustainable Sodium Sulfido Ferrate(II). Inorg Chem 2023; 62:15358-15366. [PMID: 37703452 DOI: 10.1021/acs.inorgchem.3c00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
We introduce Na2[Fe3S4], comprising anionic layers, synthesized by a simple and straightforward solid-state method based on the fusion of binary sulfides of abundant sodium and iron. The structure crystallizes in a trigonal lattice with honeycomb cavities, as well as 25% of statistical iron vacancies in the crystal structure. The compound depicts high dielectric constants from 998 to 1850 at a frequency of 1 kHz depending on the sintering temperature, comparable with benchmark dielectric materials. According to the complex electrochemical impedance results, the compound depicts an electrical conductivity at ambient temperature. Optical investigations reveal a band gap of 1.64 eV, which is in agreement with an electronic band gap of 1.63 eV computed by density functional theory calculations. Magnetometry results reveal an antiferromagnetic behavior with a transition at 120 K. These findings introduce Na2[Fe3S4] as a sustainable multifunctional material with potential for a variety of electronic and magnetic applications.
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Affiliation(s)
- Mohammad R Ghazanfari
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstr. 34-36, Berlin 14195, Germany
| | - Konrad Siemensmeyer
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
| | - Archa Santhosh
- Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, Geesthacht 21502, Germany
| | - Johannes C Vrijmoed
- Fachbereich Geowissenschaften, Freie Universität Berlin, Malteserstr. 74-100, Berlin 12249, Germany
| | - Mirko Tallu
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany
| | - Stefanie Dehnen
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany
| | - Paul Jerabek
- Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, Geesthacht 21502, Germany
| | - Günther Thiele
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstr. 34-36, Berlin 14195, Germany
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2
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Regragui N, Ziati M, Boubekraoui A, Ez-Zahraouy H. Substitution effect by selenium and tellurium elements on electronic structures, optical and thermoelectric features of FeS2: DFT + U. COMPUT THEOR CHEM 2023. [DOI: 10.1016/j.comptc.2023.114019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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3
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Nasu A, Sakuda A, Kimura T, Deguchi M, Tsuchimoto A, Okubo M, Yamada A, Tatsumisago M, Hayashi A. Iron Sulfide Na 2 FeS 2 as Positive Electrode Material with High Capacity and Reversibility Derived from Anion-Cation Redox in All-Solid-State Sodium Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203383. [PMID: 36122184 DOI: 10.1002/smll.202203383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/09/2022] [Indexed: 06/15/2023]
Abstract
It is desirable for secondary batteries to have high capacities and long lifetimes. This paper reports the use of Na2 FeS2 with a specific structure consisting of edge-shared and chained FeS4 as the host structure and as a high-capacity active electrode material. An all-solid-state sodium cell that uses Na2 FeS2 exhibits a high capacity of 320 mAh g-1 , which is close to the theoretical two-electron reaction capacity of 323 mAh g-1 , and operates reversibly for 300 cycles. The excellent electrochemical properties of all-solid-state sodium cells are derived from the anion-cation redox and rigid host structure during charging/discharging. In addition to the initial one-electron reaction of Nax FeS2 (1 ≤ x ≤ 2) activated Fe2+ /Fe3+ redox as the main redox center, the reversible sulfur redox further contributes to the high capacity. Although the additional sulfur redox affects the irreversible crystallographic changes, stable and reversible redox reactions are observed without capacity fading, owing to the local maintenance of the chained FeS4 in the host structure. Sodium iron sulfide Na2 FeS2 , which combines low-cost elements, is one of the candidates that can meet the high requirements of practical applications.
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Affiliation(s)
- Akira Nasu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Atsushi Sakuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Takuya Kimura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Minako Deguchi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Akihisa Tsuchimoto
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Masashi Okubo
- Department of Electrical Engineering and Bioscience, School of Advanced Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Atsuo Yamada
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Masahiro Tatsumisago
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Akitoshi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
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4
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Ghazanfari MR, Santhosh A, Vrijmoed JC, Siemensmeyer K, Peters B, Dehnen S, Jerabek P, Thiele G. Large-scale synthesis of mixed valence K 3[Fe 2S 4] with high dielectric and ferrimagnetic characteristics. RSC Adv 2022; 12:30514-30521. [PMCID: PMC9597588 DOI: 10.1039/d2ra05200h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/13/2022] [Indexed: 11/05/2022] Open
Abstract
Large scale, high purity synthesis of K3[Fe2S4] which indicates soft ferrimagnetic, high dielectric and semiconductive characteristics.
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Affiliation(s)
- Mohammad R. Ghazanfari
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstr. 34-36, 14195 Berlin, Germany
| | - Archa Santhosh
- Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon, Max-Planck Straße 1, 21502 Geesthacht, Germany
| | - Johannes C. Vrijmoed
- Fachbereich Geowissenschaften, Freie Universität Berlin, Malteserstr. 74-100, 12249 Berlin, Germany
| | - Konrad Siemensmeyer
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Bertram Peters
- Fachbereich Chemie, Philips-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - Stefanie Dehnen
- Fachbereich Chemie, Philips-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - Paul Jerabek
- Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon, Max-Planck Straße 1, 21502 Geesthacht, Germany
| | - Günther Thiele
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstr. 34-36, 14195 Berlin, Germany
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5
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Lin LF, Zhang Y, Alvarez G, Moreo A, Dagotto E. Origin of Insulating Ferromagnetism in Iron Oxychalcogenide Ce_{2}O_{2}FeSe_{2}. PHYSICAL REVIEW LETTERS 2021; 127:077204. [PMID: 34459630 DOI: 10.1103/physrevlett.127.077204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
An insulating ferromagnetic (FM) phase exists in the quasi-one-dimensional iron oxychalcogenide Ce_{2}O_{2}FeSe_{2}, but its origin is unknown. To understand the FM mechanism, here a systematic investigation of this material is provided, analyzing the competition between ferromagnetic and antiferromagnetic tendencies and the interplay of hoppings, Coulomb interactions, Hund's coupling, and crystal-field splittings. Our intuitive analysis based on second-order perturbation theory shows that large entanglements between doubly occupied and half filled orbitals play a key role in stabilizing the FM order in Ce_{2}O_{2}FeSe_{2}. In addition, via many-body computational techniques applied to a multiorbital Hubbard model, the phase diagram confirms the proposed FM mechanism.
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Affiliation(s)
- Ling-Fang Lin
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Yang Zhang
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Gonzalo Alvarez
- Computational Sciences and Engineering Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Adriana Moreo
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Elbio Dagotto
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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6
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Langenmaier M, Brantl J, Röhr C. Mixed Mn/In chalcogenides A3(MnIIInIII)3IQ4 (A = Na, K, Rb, Cs; Q = S, Se, Te). J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Langenmaier M, Brantl J, Röhr C. New sodium-rich mixed Mn/In chalcogenido metallates Na
12
MnIn
2
Q
10
(Q = S, Se). ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2020. [DOI: 10.1515/znb-2020-0125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The sodium-rich sulfido and selenido metallates Na12MnIn2
Q
10 (Q = S/Se) were synthesized in pure phase from melts composed of stoichiometric quantities of the manganese monochalcogenides MnQ, elemental indium and the chalcogens together with either Na2S (Q = S) or elemental sodium (Q = Se) as starting material. The samples were heated up to maximum temperatures of 1000/900 °C under an argon atmosphere; crystallization was achieved by slow cooling rates of 10 K h−1. The two isotypic compounds (monoclinic, space group P21/m, a = 678.26(2)/698.85(10), b = 2202.77(7)/2298.7(3), c = 766.39(3)/800.59(13) pm, β = 90.232(2)/90.147(5)°, Z = 2, R1 = 0.0516/0.0575) crystallize in a new structure type. According to the division of the formula as Na12[InQ
4][MnInQ
6] the salts contain ortho indate anions [InIII
Q
4]5− besides hetero-bimetallic dimers [MnIIInIII
Q
6]7−, which consist of two edge-sharing [MQ
4] tetrahedra. The seven crystallographically different sodium cations exhibit an either tetrahedral or octahedral coordination by the chalcogen atoms. Thus, the overall structure of the salt is best described by a hexagonal close packing of the sulfide/selenide anions, in which the octahedral voids of every second interlayer section are fully occupied by the (overall 5/f.u.) Na
+
positions with CN = 6. In the other half of the interlayer sheets, all tetrahedral voids (overall 10/f.u.) are occupied by the seven CN = 4 Na
+
cations, one In3+ of the ortho anion and the two Mn2+/In3+ cations (which statistically occupy one crystallographic site). This structure relation is also verified by a Bärnighausen group-subgroup tree connecting the h.c.p. (Mg type) aristotype (with its tetrahedral and octahedral voids) by an overall index of 60 with the structure of the two title compounds.
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Affiliation(s)
- Michael Langenmaier
- Institut für Anorganische und Analytische Chemie, Universität Freiburg , Freiburg , Germany
| | - Julian Brantl
- Institut für Anorganische und Analytische Chemie, Universität Freiburg , Freiburg , Germany
| | - Caroline Röhr
- Institut für Anorganische und Analytische Chemie, Universität Freiburg , Freiburg , Germany
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8
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New mixed-valent alkali chain sulfido ferrates A
1+x
[FeS2] (A = K, Rb, Cs; x = 0.333–0.787). Z KRIST-CRYST MATER 2020. [DOI: 10.1515/zkri-2020-0023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Four new mixed-valent chain alkali metal (A) sulfido ferrates of the general structure family
A
1
+
x
Fe
x
II
Fe
1
−
x
III
S
2
${A}_{1+x}\left[{\text{Fe}}_{x}^{\text{II}}{\text{Fe}}_{1-x}^{\text{III}}{\text{S}}_{2}\right]$
were synthesized in the form of tiny green-metallic needles from nearly stoichiometric melts reacting elemental potassium with natural pyrite (A = K) or previously prepared Rb2S/Cs2S2 with elemental iron and sulfur (A = Rb/Cs). The crystal structures of the compounds were determined by means of single crystal X-ray diffraction: In the (3+1)D modulated structure of K7.15[FeS2]4 (space group Ccce(00σ
3)0s0, a = 1363.87(5), b = 2487.23(13), c = 583.47(3) pm, q = 0,0,0.444, R1 = 0.055/0.148, x = 0.787), a position modulation of the two crystallographically different undulated
[
FeS
4
/
2
]
∞
1
${}_{\infty }{}^{1}\left[{\text{FeS}}_{4/2}\right]$
tetrahedra chains and the surrounding K cations is associated with an occupation modulation of one of the three potassium sites. In the case of the new monoclinic rubidium ferrate Rb4[FeS2]3 (x =
1
3
$\frac{1}{3}$
; space group P21/c, a = 1640.49(12), b = 1191.94(9), c = 743.33(6) pm, β = 94.759(4)°, Z = 4, R1 = 0.1184) the undulation of the tetrahedra chain is commensurate, the repetition unit consists of six tetrahedra. In the second new Rb ferrate, Rb7[FeS2]5 (x = 0.4; monoclinic, space group C2/c, K7[FeS2]5-type; a = 2833.9(2), b = 1197.36(9), c = 744.63(6) pm, β = 103.233(4)°, Z = 4, R1 = 0.1474) and its isotypic mixed Rb/Cs-analog Rb3.6Cs3.4[FeS2]5 (a = 2843.57(5), b = 1226.47(2), c = 759.890(10) pm, β = 103.7170(9)°, R1 = 0.0376) the chain buckling leads to a further increased repetition unit of 10 tetrahedra. For all mixed-valent ferrates, the Fe–S bond lengths continuously increase with the amount (x) of Fe(II). The buckling of the chains is controlled through the local coordination of the S atoms by the variable number of A cations of different sizes.
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9
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Cao D, Kang W, Wang W, Sun K, Wang Y, Ma P, Sun D. Okra-Like Fe 7 S 8 /C@ZnS/N-C@C with Core-Double-Shelled Structures as Robust and High-Rate Sodium Anode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1907641. [PMID: 32734690 DOI: 10.1002/smll.201907641] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 06/09/2020] [Indexed: 06/11/2023]
Abstract
Core-multishelled structures with controlled chemical composition have attracted great interest due to their fascinating electrochemical performance. Herein, a metal-organic framework (MOF)-on-MOF self-templated strategy is used to fabricate okra-like bimetal sulfide (Fe7 S8 /C@ZnS/N-C@C) with core-double-shelled structure, in which Fe7 S8 /C is distributed in the cores, and ZnS is embedded in one of the layers. The MOF-on-MOF precursor with an MIL-53 core, a ZIF-8 shell, and a resorcinol-formaldehyde (RF) layer (MIL-53@ZIF-8@RF) is prepared through a layer-by-layer assembly method. After calcination with sulfur powder, the resultant structure has a hierarchical carbon matrix, abundant internal interface, and tiered active material distribution. It provides fast sodium-ion reaction kinetics, a superior pseudocapacitance contribution, good resistance of volume changes, and stepwise sodiation/desodiation reaction mechanism. As an anode material for sodium-ion batteries, the electrochemical performance of Fe7 S8 /C@ZnS/N-C@C is superior to that of Fe7 S8 /C@ZnS/N-C, Fe7 S8 /C, or ZnS/N-C. It delivers a high and stable capacity of 364.7 mAh g-1 at current density of 5.0 A g-1 with 10 000 cycles, and registers only 0.00135% capacity decay per cycle. This MOF-on-MOF self-templated strategy may provide a method to construct core-multishelled structures with controlled component distributions for the energy conversion and storage.
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Affiliation(s)
- Dongwei Cao
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
| | - Wenpei Kang
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
| | - Wenhong Wang
- College of Chemical Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
| | - Kaian Sun
- College of Chemical Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
| | - Yuyu Wang
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
| | - Ping Ma
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
| | - Daofeng Sun
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao, Shandong, 266580, P. R. China
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10
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Langenmaier M, Wissinger S, Röhr C. K
5
[InSe
4
] and K
12
[InS
4
]
2
(S): New Alkali Chalcogenido Indates with [In
Q
4
]
5
–
ortho
Anions. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael Langenmaier
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Sarah Wissinger
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Caroline Röhr
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg Albertstr. 21 79104 Freiburg Germany
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11
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Langenmaier M, Wissinger S, Röhr C. K
6
In
2
Q
6
(
Q
= S, Se, Te): Missing Links in the Series of Alkali Chalcogenido Ditrielates(III). Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Michael Langenmaier
- Institut für Anorganische und Analytische Chemie Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - S. Wissinger
- Institut für Anorganische und Analytische Chemie Universität Freiburg Albertstr. 21 79104 Freiburg Germany
| | - Caroline Röhr
- Institut für Anorganische und Analytische Chemie Universität Freiburg Albertstr. 21 79104 Freiburg Germany
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12
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Langenmaier M, Röhr C. The new sodium tellurido manganates(II) Na 2Mn 2Te 3, Na 2Mn 3Te 4, Na 2
AMnTe 3 ( A=K, Rb), and NaCsMnTe 2. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2019. [DOI: 10.1515/znb-2019-0104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A series of new sodium and mixed Na/A (A = K, Rb, Cs) tellurido manganates have been synthesized from melts of the pure elements (or MnTe) at maximum temperatures of 600–1000°C. The monoclinic crystal structures of the two pure sodium salts Na2Mn2Te3 (space group C2/c, a = 1653.68(2), b = 1482.57(2), c = 773.620(10) pm, β = 117.52°, Z = 8, R1 = 0.0225) and Na2Mn3Te4 (space group C2/m, a = 1701.99(3), b = 438.741(8), c = 691.226(12) pm, β = 90.3171(8)°, Z = 2, R1 = 0.0270) are both based on a hexagonal close packed Te2− arrangement. Na2Mn2Te3 is isotypic with Na2Mn2S3 and Na2Mn2Se3 and contains layers of [MnTe4] tetrahedra, which are connected via common edges to form tetramers [Mn4Te6]. These tetramers are further connected via μ
3-Te atoms. Na2Mn3Te4 crystallizes in a new structure type, recently also reported for the selenido salt Na2Mn3Se4. Mn(2) forms ribbons of vertex-sharing dinuclear units
∞
1
[
Te
2
/
2
MnTe
2
MnTe
2
/
2
]
$_\infty ^1[{\rm{T}}{{\rm{e}}_{2/2}}{\rm{MnT}}{{\rm{e}}_2}{\rm{MnT}}{{\rm{e}}_{2/2}}]$
running along the short b axis of the monoclinic cell. The Te atoms of these ribbons are also the ligands of edge-sharing [Mn(1)Te6] chains of octahedra. Similar to Na2Mn2Te3, the Na+ cations are octahedrally coordinated and the cations occupy tetrahedral (Mn2+) and octahedral (Na+, Mn2+) voids in the close Te2− packing. The isotypic K/Rb salts Na2
AMnTe3 crystallize in a new structure type (orthorhombic, space group Pmc21, a = 1069.70(4)/1064.34(2), b = 1350.24(5)/1350.47(3), c = 1238.82(4)/1236.94(3) pm, Z = 4, R1 = 0.0445/0.0210). In contrast to the simple formula indicating a Mn(III) compound, the complex structure contains one layer consisting of undulated chains of edge-sharing tetrahedra
∞
1
[
Mn
II
Te
4
/
2
]
$_\infty ^1[{\rm{M}}{{\rm{n}}^{{\rm{II}}}}{\rm{T}}{{\rm{e}}_{4/2}}]$
separated by free ditelluride dumbbells [Te2]2− and a second layer containing a complex chain of edge- and vertex-sharing [MnIITe4] tetrahedra, in which Mn(II) is coordinated to μ
1- and μ
2-Te2− ligands and an η
1-ditellurido ligand. The cesium salt NaCsMnTe2 (orthorhombic, space group Cccm, a = 694.21(2), b = 1536.57(4), c = 664.47(2) pm, Z = 4, R1 = 0.0131) likewise forms a new structure type, which is an ordered superstructure of ThCr2Si2. Linear chains
∞
1
[
MnTe
4
/
2
]
$_\infty ^1[{\rm{MnT}}{{\rm{e}}_{4/2}}]$
of edge-sharing tetrahedra are connected with similar chains
∞
1
[
NaTe
4
/
2
]
$_\infty ^1[{\rm{NaT}}{{\rm{e}}_{4/2}}]$
to form [NaMnTe2] layers. The larger alkali cations Cs+ between the layers exhibit a cubic (CN = 8) coordination.
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Affiliation(s)
- Michael Langenmaier
- Institut für Anorganische und Analytische Chemie , Universität Freiburg , Albertstrasse 21, D-79104 Freiburg , Germany
| | - Caroline Röhr
- Institut für Anorganische und Analytische Chemie , Universität Freiburg , Albertstrasse 21, D-79104 Freiburg , Germany
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13
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Chen W, Zhang X, Mi L, Liu C, Zhang J, Cui S, Feng X, Cao Y, Shen C. High-Performance Flexible Freestanding Anode with Hierarchical 3D Carbon-Networks/Fe 7 S 8 /Graphene for Applicable Sodium-Ion Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806664. [PMID: 30614589 DOI: 10.1002/adma.201806664] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 12/17/2018] [Indexed: 05/26/2023]
Abstract
Sodium-ion batteries (SIBs) have gained tremendous interest for grid scale energy storage system and power energy batteries. However, the current researches of anode for SIBs still face the critical issues of low areal capacity, limited cycle life, and low initial coulombic efficiency for practical application perspective. To solve this issue, a kind of hierarchical 3D carbon-networks/Fe7 S8 /graphene (CFG) is designed and synthesized as freestanding anode, which is constructed with Fe7 S8 microparticles well-welded on 3D-crosslinked carbon-networks and embedded in highly conductive graphene film, via a facile and scalable synthetic method. The as-prepared freestanding electrode CFG represents high areal capacity (2.12 mAh cm-2 at 0.25 mA cm-2 ) and excellent cycle stability of 5000 cycles (0.0095% capacity decay per cycle). The assembled all-flexible sodium-ion battery delivers remarkable performance (high areal capacity of 1.42 mAh cm-2 at 0.3 mA cm-2 and superior energy density of 144 Wh kg-1 ), which are very close to the requirement of practical application. This work not only enlightens the material design and electrode engineering, but also provides a new kind of freestanding high energy density anode with great potential application prospective for SIBs.
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Affiliation(s)
- Weihua Chen
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
- National Engineering and Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Xixue Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Liwei Mi
- Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, 450007, P. R. China
| | - Chuntai Liu
- National Engineering and Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Jianmin Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Shizhong Cui
- Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, 450007, P. R. China
| | - Xiangming Feng
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Yuliang Cao
- Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, P. R. China
| | - Changyu Shen
- National Engineering and Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, P. R. China
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14
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Langenmaier M, Rackl T, Johrendt D, Röhr C. Alkali chalcogenido ortho manganates(II) A
6MnQ
4 (A=Rb, Cs; Q=S, Se, Te). ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2018. [DOI: 10.1515/znb-2018-0138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Abstract
The six isotypic alkali ortho chalcogenido manganates A
6[MnII
Q
4] (A=Rb, Cs; Q=S, Se, Te) were synthesized – in most cases in pure phase – from stoichiometric mixtures of the manganese monochalcogenides MnQ, the elemental chalcogens and Rb2S/Cs2S2 (sulfido salts) or the pure alkali elements (selenido and tellurido salts) as alkali sources at maximum temperatures between 650 and 800°C. Their hexagonal crystal structures were refined by means of X-ray single crystal data (space group P63
mc, Na6ZnO4-type structure, Z=2; A/Q: Rb/S: a=1019.34(2), c=792.560(10) pm, R1=0.0166; Rb/Se: a=1055.74(2), c=821.14(2) pm, R1=0.0275; Rb/Te: a=1126.68(2), c=860.54(2) pm, R1=0.0152; Cs/S: a=1056.68(2), c=831.22(2) pm, R1=0.0168; Cs/Se: a=1096.04(3), c=858.13(2) pm, R1=0.0194; and Cs/Te: a=1167.72(3), c=896.95(2) pm, R1=0.0140). The chiral structures contain isolated C
3 symmetric, but very close to ideal tetrahedral, ortho manganate(II) anions [MnII
Q
4]6− with Mn–Q distances of 248.7–250.7 (Q=S), 260.7–263.0 (Q=Se) and 280.0–282.4 pm (Q=Te). The chalcogenide ions form a hexagonal closed packing with slightly puckered 36 nets, in which the A(2) cations occupy 3/4 of the octahedral interstices, whereas Mn takes 1/8 and A(1) 3/8 of the tetrahedral voids. Magnetic measurements on the three Cs compounds showed Curie-Weiss behavior down to a temperature of 1.9 K, with magnetic moments significantly reduced with respect to the expected spin-only value of a d
5 ion. The electronic band structures of the four salts (Na/Rb)6Mn(S/Te)4, which were calculated within the GGA+U approach, allow a comparison of the chemical bonding characteristics and the magnetic properties within the alkali cation and the chalcogenido ligand series.
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Affiliation(s)
- Michael Langenmaier
- Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21 , D-79104 Freiburg , Germany
| | - Tobias Rackl
- Department Chemie , Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 , D-81377 München , Germany
| | - Dirk Johrendt
- Department Chemie , Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 , D-81377 München , Germany
| | - Caroline Röhr
- Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21 , D-79104 Freiburg , Germany
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