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  1. Article ; Online: Thermal Expansion Neutralization Enhancing the Cycling Stability of Ni-Rich LiNi

    Du, Kai / Wu, Maokun / Hu, Xinhong / Wang, Wei-Hua / Pan, Du / Wang, Zhenbo / Yin, Yanfeng / Zhao, Huiling / Bai, Ying

    ACS applied materials & interfaces

    2023  Volume 15, Issue 28, Page(s) 33703–33711

    Abstract: As promising cathode candidates with advantageous capacity and price superiority for lithium-ion batteries, Ni-rich materials are severely impeded in the practical application due to their poor microstructural stability induced by the intrinsic ... ...

    Abstract As promising cathode candidates with advantageous capacity and price superiority for lithium-ion batteries, Ni-rich materials are severely impeded in the practical application due to their poor microstructural stability induced by the intrinsic Li
    Language English
    Publishing date 2023-07-09
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c06932
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Probing Quantum Capacitance of Typical Two-Dimensional Lattices Based on the Tight-Binding Model

    Li, Wenting / Cui, Jintao / Wu, Maokun / Wang, Lijing / Cheng, Yahui / Dong, Hong / Liu, Hui / Lu, Feng / Wang, Weichao / Wang, Wei-Hua

    Journal of physical chemistry. 2022 Jan. 14, v. 126, no. 3

    2022  

    Abstract: The quantum capacitance (Cq) of two-dimensional (2D) electrode materials is closely connected with the 2D lattice symmetry and the electronic structures. Understanding the correlation between the 2D lattice structures and their Cq, in particular, ... ...

    Abstract The quantum capacitance (Cq) of two-dimensional (2D) electrode materials is closely connected with the 2D lattice symmetry and the electronic structures. Understanding the correlation between the 2D lattice structures and their Cq, in particular, unveiling the function of ferromagnetic spin polarization on Cq, enables one to design highly efficient capacitive materials. Herein, the electronic structures, the specific Cq, and the effect of the spin polarization in 2D square, triangular, and hexagonal lattices have been explored to access the origin and the modulation of Cq based on the single-orbital tight-binding model at half-filling. Compared with the nonmagnetic states, it is found that the range of the specific Cq with considerable values is evidently extended in spin-polarized states. Moreover, the specific Cq near the zero bias is greatly improved in the graphene-like hexagonal lattice under the spin-polarized state owing to the improved density of states near the Fermi level. Compared with only considering the nearest neighboring hopping interaction t₁, the next-nearest neighboring hopping interaction t₂ further increases the specific Cq near zero bias, which results from the more localized density of states near the Fermi level. Therefore, the specific Cq of 2D systems could be manipulated through modulating magnetic properties and different electron hopping interactions. These findings would provide a route to design 2D electrode materials with high quantum capacitance.
    Keywords capacitance ; electrodes ; ferromagnetism ; models ; physical chemistry
    Language English
    Dates of publication 2022-0114
    Size p. 1256-1263.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.1c08439
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Understanding the Effect of Top Electrode on Ferroelectricity in Atomic Layer Deposited Hf

    Wang, Xuepei / Wen, Yichen / Wu, Maokun / Cui, Boyao / Wu, Yi-Shan / Li, Yuchun / Li, Xiaoxi / Ye, Sheng / Ren, Pengpeng / Ji, Zhi-Gang / Lu, Hong-Liang / Wang, Runsheng / Zhang, David Wei / Huang, Ru

    ACS applied materials & interfaces

    2023  Volume 15, Issue 12, Page(s) 15657–15667

    Abstract: It is commonly believed that the impact of the top electrodes on the ferroelectricity of hafnium-based thin films is due to strain engineering. However, several anomalies have occurred that put existing theories in doubt. This work carries out a detailed ...

    Abstract It is commonly believed that the impact of the top electrodes on the ferroelectricity of hafnium-based thin films is due to strain engineering. However, several anomalies have occurred that put existing theories in doubt. This work carries out a detailed study of this issue using both theoretical and experimental approaches. The 10 nm Hf
    Language English
    Publishing date 2023-03-16
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.2c22263
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: First-Principle Prediction on STM Tip Manipulation of Ti Adatom on Two-Dimensional Monolayer YBr

    Liu, Pan / Wu, Maokun / Liu, Hui / Lu, Feng / Wang, Wei-Hua / Cho, Kyeongjae

    Scanning

    2019  Volume 2019, Page(s) 5434935

    Abstract: Scanning tunneling microscopy (STM) is an important tool in surface science on atomic scale characterization and manipulation. In this work, Ti adatom manipulation is theoretically simulated by using a tungsten tip (W-tip) in STM based on first-principle ...

    Abstract Scanning tunneling microscopy (STM) is an important tool in surface science on atomic scale characterization and manipulation. In this work, Ti adatom manipulation is theoretically simulated by using a tungsten tip (W-tip) in STM based on first-principle calculations. The results demonstrate the possibility of inserting Ti adatoms into the atomic pores of monolayer YBr
    Language English
    Publishing date 2019-02-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 391900-6
    ISSN 1932-8745 ; 0161-0457
    ISSN (online) 1932-8745
    ISSN 0161-0457
    DOI 10.1155/2019/5434935
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  5. Article: Dehydration of Electrochemically Protonated Oxide: SrCoO₂ with Square Spin Tubes

    Li, Hao-Bo / Kobayashi, Shunsuke / Zhong, Chengchao / Namba, Morito / Cao, Yu / Kato, Daichi / Kotani, Yoshinori / Lin, Qianmei / Wu, Maokun / Wang, Wei-Hua / Kobayashi, Masaki / Fujita, Koji / Tassel, Cédric / Terashima, Takahito / Kuwabara, Akihide / Kobayashi, Yoji / Takatsu, Hiroshi / Kageyama, Hiroshi

    Journal of the American Chemical Society. 2021 Oct. 14, v. 143, no. 42

    2021  

    Abstract: Controlling oxygen deficiencies is essential for the development of novel chemical and physical properties such as high-Tc superconductivity and low-dimensional magnetic phenomena. Among reduction methods, topochemical reactions using metal hydrides (e.g. ...

    Abstract Controlling oxygen deficiencies is essential for the development of novel chemical and physical properties such as high-Tc superconductivity and low-dimensional magnetic phenomena. Among reduction methods, topochemical reactions using metal hydrides (e.g., CaH₂) are known as the most powerful method to obtain highly reduced oxides including Nd₀.₈Sr₀.₂NiO₂ superconductor, though there are some limitations such as competition with oxyhydrides. Here we demonstrate that electrochemical protonation combined with thermal dehydration can yield highly reduced oxides: SrCoO₂.₅ thin films are converted to SrCoO₂ by dehydration of HSrCoO₂.₅ at 350 °C. SrCoO₂ forms square (or four-legged) spin tubes composed of tetrahedra, in contrast to the conventional infinite-layer structure. Detailed analyses suggest the importance of the destabilization of the SrCoO₂.₅ precursor by electrochemical protonation that can greatly alter reaction energy landscape and its gradual dehydration (H₁–ₓSrCoO₂.₅–ₓ/₂) for the SrCoO₂ formation. Given the applicability of electrochemical protonation to a variety of transition metal oxides, this simple process widens possibilities to explore novel functional oxides.
    Keywords electrochemistry ; geometry ; magnetism ; oxygen ; protonation ; superconductivity
    Language English
    Dates of publication 2021-1014
    Size p. 17517-17525.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.1c07043
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

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  6. Article ; Online: Molecularly Thin Electrolyte for All Solid-State Nonvolatile Two-Dimensional Crystal Memory.

    Liang, Jierui / Xu, Ke / Wu, Maokun / Hunt, Benjamin M / Wang, Wei-Hua / Cho, Kyeongjae / Fullerton-Shirey, Susan K

    Nano letters

    2019  Volume 19, Issue 12, Page(s) 8911–8919

    Abstract: A molecularly thin electrolyte is developed to demonstrate a nonvolatile, solid-state, one-transistor (1T) memory based on an electric-double-layer (EDL) gated ... ...

    Abstract A molecularly thin electrolyte is developed to demonstrate a nonvolatile, solid-state, one-transistor (1T) memory based on an electric-double-layer (EDL) gated WSe
    Language English
    Publishing date 2019-11-11
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
    ISSN 1530-6992
    ISSN (online) 1530-6992
    DOI 10.1021/acs.nanolett.9b03792
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Electronic structures and anisotropic carrier mobilities of monolayer ternary metal iodides MLaI

    Xin, Baojuan / Hu, Yaoqiao / Wu, Maokun / Cui, Jintao / Li, Luyan / Cheng, Yahui / Liu, Hui / Lu, Feng / Cho, Kyeongjae / Wang, Wei-Hua

    Journal of physics. Condensed matter : an Institute of Physics journal

    2021  Volume 33, Issue 35

    Abstract: Exploiting two-dimensional (2D) materials with natural band gaps and anisotropic quasi-one-dimensional (quasi-1D) carrier transport character is essential in high-performance nanoscale transistors and photodetectors. Herein, the stabilities, electronic ... ...

    Abstract Exploiting two-dimensional (2D) materials with natural band gaps and anisotropic quasi-one-dimensional (quasi-1D) carrier transport character is essential in high-performance nanoscale transistors and photodetectors. Herein, the stabilities, electronic structures and carrier mobilities of 2D monolayer ternary metal iodides MLaI
    Language English
    Publishing date 2021-07-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472968-4
    ISSN 1361-648X ; 0953-8984
    ISSN (online) 1361-648X
    ISSN 0953-8984
    DOI 10.1088/1361-648X/ac0c3d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Ideal two-dimensional solid electrolytes for fast ion transport: metal trihalides MX

    Wu, Maokun / Liu, Pan / Li, Luyan / Dong, Hong / Cheng, Yahui / Chen, Haijun / Wang, Weichao / Liu, Hui / Lu, Feng / Wang, Wei-Hua / Cho, Kyeongjae

    Nanoscale

    2020  Volume 12, Issue 13, Page(s) 7188–7195

    Abstract: Exploring ultrathin two-dimensional (2D) solid electrolytes with fast ion transport is highly desirable in nanoelectronics, ionic devices and various energy storage systems, following the rapid scaling of devices to the nanometer scale. Herein, two- ... ...

    Abstract Exploring ultrathin two-dimensional (2D) solid electrolytes with fast ion transport is highly desirable in nanoelectronics, ionic devices and various energy storage systems, following the rapid scaling of devices to the nanometer scale. Herein, two-dimensional (2D) metal trihalides MX3 (ScCl3, ScBr3, AsI3, ScI3, YBr3, SbI3, YI3 and BiI3) with intrinsic atomic pore structures have been examined and found to be promising as realistic 2D solid electrolytes. Through examining the binding interactions and the diffusion barriers of monolayer MX3-ion (Li+, Na+, K+, Mg2+, and Ca2+) systems by utilizing first principles calculations, it is found that MX3-ion complexes are energetically favorable and the energy barriers of some MX3-ion systems are comparable to or even smaller than those of the conventional solid electrolyte systems. More significantly, the short diffusion time of Na+ and K+ ions in some monolayers MX3 at the nanosecond (ns) or even at the sub-ns scale indicates fast ion transport. In terms of practical applications, ultrafast Li+ travelling in the timescale of sub-ns to ns and Na+ in several tens ns in few-layer MX3 is achieved. In addition, the insulating nature of wide band gaps for MX3 is maintained during the ion transport, which is essential for solid electrolytes. These theoretical results provide fundamental guidance that MX3 materials with natural atomic pores are realistic candidates for 2D solid electrolytes with broad applications in ionic devices and energy storage devices.
    Language English
    Publishing date 2020-03-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/c9nr08719b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Dehydration of Electrochemically Protonated Oxide: SrCoO

    Li, Hao-Bo / Kobayashi, Shunsuke / Zhong, Chengchao / Namba, Morito / Cao, Yu / Kato, Daichi / Kotani, Yoshinori / Lin, Qianmei / Wu, Maokun / Wang, Wei-Hua / Kobayashi, Masaki / Fujita, Koji / Tassel, Cédric / Terashima, Takahito / Kuwabara, Akihide / Kobayashi, Yoji / Takatsu, Hiroshi / Kageyama, Hiroshi

    Journal of the American Chemical Society

    2021  Volume 143, Issue 42, Page(s) 17517–17525

    Abstract: Controlling oxygen deficiencies is essential for the development of novel chemical and physical properties such as high- ...

    Abstract Controlling oxygen deficiencies is essential for the development of novel chemical and physical properties such as high-
    Language English
    Publishing date 2021-10-14
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.1c07043
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 55/32: Show issues
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