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Kalinkin MO, Kellerman DG, Medvedeva NI. Ab initio study of stability and quadrupole coupling constants in borophosphates. Dalton Trans 2024; 53:11928-11937. [PMID: 38958061 DOI: 10.1039/d4dt01429d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
The DFT method was used to predict the formation energies and quadrupole coupling constants CQ in a series of borophosphates: Li3BP2O8, Li2NaBP2O8, Na3BP2O8, Li2B3PO8, Na5B2P3O13, LiNa2B5P2O14 and Na3B6PO13 composed of different networks and different amounts of borate and phosphate units. The change in formation energies with increasing number of B atoms in this series is attributed to the multiplicity of boron sites and is explained by density of states calculations. The calculated CQ values of 7Li, 23Na and 11B are correlated with the coordination and distortion of polyhedra to elucidate the influence of local and more distant environments. As for the CQ of 11B, it should be in the ranges of 0.26-0.36, 0.48-0.84 and ∼1 MHz for boron tetrahedral distortion indices of 0.004-0.013, 0.015-0.019 and 0.033, respectively, whereas CQ ∼3.0 MHz corresponds to boron in a triangular site. The obtained numerical relationships make it possible to predict the quadrupole frequencies for these nuclei based only on their local environment, and vice versa, to propose structural models from NMR data. These results provide guidance for studying similar characteristics of other borophosphates, the structure of which varies depending on the initial reaction, composition and temperature.
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Jiang SK, Yang SC, Nikodimos Y, Huang SJ, Lin KY, Kuo YH, Tsai BY, Li JN, Lin SD, Jiang JC, Wu SH, Su WN, Hwang BJ. Lewis Acid Probe for Basicity of Sulfide Electrolytes Investigated by 11B Solid-State NMR. JACS AU 2023; 3:2174-2182. [PMID: 37654594 PMCID: PMC10466319 DOI: 10.1021/jacsau.3c00242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 09/02/2023]
Abstract
Sulfide-based solid-state lithium-ion batteries (SSLIB) have attracted a lot of interest globally in the past few years for their high safety and high energy density over the traditional lithium-ion batteries. However, sulfide electrolytes (SEs) are moisture-sensitive which pose significant challenges in the material preparation and cell manufacturing. To the best of our knowledge, there is no tool available to probe the types and the strength of the basic sites in sulfide electrolytes, which is crucial for understanding the moisture stability of sulfide electrolytes. Herein, we propose a new spectral probe with the Lewis base indicator BBr3 to probe the strength of Lewis basic sites on various sulfide electrolytes by 11B solid-state NMR spectroscopy (11B-NMR). The active sulfur sites and the corresponding strength of the sulfide electrolytes are successfully evaluated by the proposed Lewis base probe. The probed strength of the active sulfur sites of a sulfide electrolyte is consistent with the results of DFT (density functional theory) calculation and correlated with the H2S generation rate when the electrolyte was exposed in moisture atmosphere. This work paves a new way to investigate the basicity and moisture stability of the sulfide electrolytes.
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Affiliation(s)
- Shi-Kai Jiang
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Sheng-Chiang Yang
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Yosef Nikodimos
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Shing-Jong Huang
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Kuan-Yu Lin
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Yi-Hui Kuo
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Bo-Yang Tsai
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Jhao-Nan Li
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Shawn D. Lin
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - Jyh-Chiang Jiang
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
| | - She-Huang Wu
- Graduate
Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
| | - Wei-Nien Su
- Graduate
Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
| | - Bing Joe Hwang
- Department
of Chemical Engineering, National Taiwan
University of Science and Technology, Taipei 106335, Taiwan
- National
Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
- Sustainable
Electrochemical Energy Development Center, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
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Peng H, Chen L, Wang Y, Cao B, Li D, Chen Y. The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37200490 DOI: 10.1021/acsami.3c03173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
As a graphite-like material, the LiBC can deliver a high capacity up to 500 mA h g-1 in Li-ion batteries, which is dependent on the carbon precursor, the high-temperature treatment, and the lithium insufficiency. However, the underlying mechanism is still not clear for the electrochemical reactions of LiBC. In this work, the pristine LiBC was reacted with aqueous solutions of different alkalinity, which was delithiated chemically and retained the layered structure. According to the XPS and NMR results, the B-B bond might be produced through the aqueous reaction or the initial charge process, which can be oxidized (charged) and reduced (discharged) in the electrochemical measurements. In the Li-ion battery, the reversible capacity of LiBC increases evidently with the alkalinity of aqueous solution and significantly rises to a similar value of ca. 285 mA h g-1 under 200 cycles. Therefore, the specific capacity of LiBC should be contributed by the active sites of B-B bonds, which can be significantly increased through the reaction with the hydroxyl ions, and this strategy might be adopted to activate more graphite-like materials.
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Affiliation(s)
- Hanzhen Peng
- State Key Laboratory of Marine Resources Utilization in South China Sea, Key Laboratory of Research on Utilization of Si-Zr-Ti Resources of Hainan Province, School of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Langlang Chen
- State Key Laboratory of Marine Resources Utilization in South China Sea, Key Laboratory of Research on Utilization of Si-Zr-Ti Resources of Hainan Province, School of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Yifeng Wang
- State Key Laboratory of Marine Resources Utilization in South China Sea, Key Laboratory of Research on Utilization of Si-Zr-Ti Resources of Hainan Province, School of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Bokai Cao
- Guangdong Key Laboratory for Hydrogen Energy Technologies; School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China
| | - De Li
- State Key Laboratory of Marine Resources Utilization in South China Sea, Key Laboratory of Research on Utilization of Si-Zr-Ti Resources of Hainan Province, School of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Yong Chen
- Guangdong Key Laboratory for Hydrogen Energy Technologies; School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China
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NMR spectroscopy probes microstructure, dynamics and doping of metal halide perovskites. Nat Rev Chem 2021; 5:624-645. [PMID: 37118421 DOI: 10.1038/s41570-021-00309-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2021] [Indexed: 12/23/2022]
Abstract
Solid-state magic-angle spinning NMR spectroscopy is a powerful technique to probe atomic-level microstructure and structural dynamics in metal halide perovskites. It can be used to measure dopant incorporation, phase segregation, halide mixing, decomposition pathways, passivation mechanisms, short-range and long-range dynamics, and other local properties. This Review describes practical aspects of recording solid-state NMR data on halide perovskites and how these afford unique insights into new compositions, dopants and passivation agents. We discuss the applicability, feasibility and limitations of 1H, 13C, 15N, 14N, 133Cs, 87Rb, 39K, 207Pb, 119Sn, 113Cd, 209Bi, 115In, 19F and 2H NMR in typical experimental scenarios. We highlight the pivotal complementary role of solid-state mechanosynthesis, which enables highly sensitive NMR studies by providing large quantities of high-purity materials of arbitrary complexity and of chemical shifts calculated using density functional theory. We examine the broader impact of solid-state NMR on materials research and how its evolution over seven decades has benefitted structural studies of contemporary materials such as halide perovskites. Finally, we summarize some of the open questions in perovskite optoelectronics that could be addressed using solid-state NMR. We, thereby, hope to stimulate wider use of this technique in materials and optoelectronics research.
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Renka S, Pavić L, Tricot G, Mošner P, Koudelka L, Moguš-Milanković A, Šantić A. A significant enhancement of sodium ion conductivity in phosphate glasses by addition of WO 3 and MoO 3: the effect of mixed conventional-conditional glass-forming oxides. Phys Chem Chem Phys 2021; 23:9761-9772. [PMID: 33881071 DOI: 10.1039/d1cp00498k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Ion conducting oxide glasses are attractive materials for application in various electrochemical devices and an understanding of the structure-transport properties relationship is crucial for their development. An interesting effect of glass structure on the dynamics of mobile ions is the mixed glass-former effect which causes a non-linear change of ionic conductivity when glass-forming oxides get gradually substituted. Here, we report a strong, positive effect of structural changes on the conductivity of sodium ions in two glass systems 40Na2O-xMoO3-(60-x)P2O5 and 40Na2O-xWO3-(60-x)P2O5; x = 0-50 mol% where a conventional glass-forming oxide (P2O5) is gradually replaced by WO3/MoO3 which are conditional ones. In both glass systems, the compositional change in DC conductivity is non-linear, with the maximal increase of four orders of magnitude in the case of WO3 and three orders of magnitude in the case of MoO3. This significant enhancement of ionic conductivity is related to the formation of mixed phosphate-tungstate and phosphate-molybdate units in the glass network. The facilitating effect of these structural units on sodium ion dynamics is also observed in the changes of the shape of frequency-dependent conductivity and in the values of typical spatial extent of diffusion of sodium ions known as the Sidebottom length.
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Affiliation(s)
- Sanja Renka
- Division of Materials Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
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Edén M. Editorial for the Special Issue on Solid-State NMR Spectroscopy in Materials Chemistry. Molecules 2020; 25:molecules25122720. [PMID: 32545444 PMCID: PMC7355940 DOI: 10.3390/molecules25122720] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 06/08/2020] [Indexed: 12/27/2022] Open
Affiliation(s)
- Mattias Edén
- Physical Chemistry Division, Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
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