Browsing by Author "Zhang, S"

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    Author Correction: A one-third magnetization plateau phase as evidence for the Kitaev interaction in a honeycomb-lattice antiferromagnet
    (Springer Nature, 2023-09-10) Shangguan, Y; Bao, S; Dong, ZY; Xi, N; Gao, YP; Ma, Z; Wang, W; Qi, Z; Zhang, S; Huang, Z; Liao, J; Zhao, X; Zhang, B; Cheng, S; Xu, H; Yu, DH; Mole, RA; Murai, N; Ohira-Kawamura, S; He, LH; Hao, J; Yan, QB; Song, F; Li, W; Yu, SL; Li, JX; Wen, JS
    Correction to: Nature Physics, published online 25 September 2023. In the version of the article initially published, the affiliation of Zhen Ma, now reading School of Materials Science and Engineering, Hubei Normal University, Huangshi, China, appeared incorrectly. This has been updated in the HTML and PDF versions of the article. n the version of the article initially published, the affiliation of Zhen Ma, now reading School of Materials Science and Engineering, Hubei Normal University, Huangshi, China, appeared incorrectly. This has been updated in the HTML and PDF versions of the article. © 2024 Springer Nature Limited.
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    Enhancing the reaction kinetics and structural stability of high-voltage LiCoO 2 via polyanionic species anchoring
    (Royal Society of Chemistry (RSC), 2024-05-16) Zheng, W; Liang, GM; Guo, H; Li, JX; Zou, JS; Yuwono, JA; Shu, H; Zhang, S; Peterson, VK; Johannessen, B; Thomsen, L; Hu, WB; Guo, ZP
    Increasing the charging voltage to 4.6 V directly enhances battery capacity and energy density of LiCoO2 cathodes for lithium-ion batteries. However, issues of the activated harmful phase evolution and surface instability in high-voltage LiCoO2 lead to dramatic battery capacity decay. Herein, polyanionic PO43− species have been successfully anchored at the surface of LiCoO2 materials, achieving superior battery performance. The polyanionic species acting as micro funnels at the material surface, could expand LiCoO2 surface lattice spacing by 10%, contributing to enhanced Li diffusion kinetics and consequent excellent rate performance of 164 mA h g−1 at 20C (1C = 274 mA g−1). Crucially, polyanionic species with high electronegativity could stabilize surface oxygen at high voltage by reducing O 2p and Co 3d orbital hybridization, thus suppressing surface Co migration and harmful H1–3 phase formation and leading to superior cycling stability with 84% capacity retention at 1C after 300 cycles. Furthermore, pouch cells containing modified LiCoO2 and Li metal electrodes deliver an ultra-high energy density of 513 W h kg−1 under high loadings of 32 mg cm−2. This work provides insightful directions for modifying the material surface structure to obtain high-energy-density cathodes with high-rate performance and long service life. © Royal Society of Chemistry 2024.
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    The promise of high-entropy materials for high-performance rechargeable Li-ion and Na-ion batteries
    (Elsevier, 2023-12-20) Zheng, W; Liang, G; Liu, Q; Li, JX; Yuwono, JA; Zhang, S; Peterson, VK; Guo, ZP
    Our growing dependence on rechargeable Li/Na-ion batteries calls for substantial improvements in the electrochemical performance of battery materials, including cathodes, anodes, and electrolytes. However, the performance enhancements based on traditional modification methods of elemental doping and surface coating are still far from the target of high-performance rechargeable batteries. Fortunately, the recent emergence of high-entropy materials preserving a stable solid-state phase for energy-related applications provides unprecedented flexibility and variability in materials composition and electronic structure, opening new avenues to accelerate battery materials development. This perspective first presents clear qualitative and quantitative definitions for high-entropy battery materials, as well as summarizes the enhancement mechanisms. Then, we comprehensively review state-of-the-art research progress and highlight key factors in the rational design of advanced high-entropy battery materials from both experimental and calculational aspects. Moreover, the challenges limiting the progress of this research are presented, alongside insights and approaches to address these issues at the research forefront. Finally, we outline potential directions for extending the future development of the high-entropy strategy to solve other critical issues in battery materials research. This perspective will guide researchers in their studies toward the development of high-performance rechargeable Li-ion and Na-ion batteries. © 2024 Elsevier Inc. - Open Archive
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    Steels and intermetallics under extreme conditions
    (Australian Institute of Physics, 2016-02-02) Liss, KD; Dippenaar, RJ; Akita, K; Funakoshi, K; Reid, M; Suzuki, H; Shobu, T; Higo, Y; Saitoh, H; Zhang, S; Tomato, Y
    Materials are being designed and engineered for ever superior mechanical and operational properties, such as steels for lighter cars and energy-absorbing behaviour in an accident, and titanium aluminides for lighter airplane turbine blades. The manufacturing of such materials may involve processes at extreme conditions, under high pressure or high temperature. Examples are high-pressure torsion and near net-shape forging. Therefore, it becomes eminently important to know and understand the phase diagrams of such materials at extreme conditions. Structural changes may open processing windows, while elevated mechanical properties are conserved under less extreme conditions. Here, we present first phase diagram studies on high-manganese steels and on titanium aluminides by in-situ synchrotron X-ray diffraction in a large-volume cell.