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Theoretical study on the synergistic mechanism of Fe–Mn in sodium-ion batteries

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Particuology 2024年第10期93卷 284-290页

作者： Yang you Mingliang Yuan School of Mineral Processing and Bioengineering Central South UniversityChangsha410083China

This article conducts first-principles calculations to initially explore the construction of two configurations,NaFeO_(2)(NFO)and NaMnO_(2)(NMO),and studies the mixing enthalpies under different Fe–Mn *** results indicate that NaFe3/8Mn5/8O_(2)(NFMO)exhibits the most thermodynamically stable *** calculations on the mixing enthalpies and volume changes during the sodium extraction process for NFO,NMO,and NFMO configurations are presented,along with the partial density of states(PDOS)and Bader charges of transition metals(TM)and *** calculations reveal the synergistic mechanism of Fe and *** and Mn can engage in more complex electron exchanges during sodium extraction,optimizing the internal electron density distribution and overall charge balance,thereby stabilizing the crystal structure and reducing the migration of Fe^(3+)to the sodium layers during deep sodium *** interaction between Fe’s 3d electrons and Mn’s 3d electrons through the shared oxygen atoms’2p orbitals occurs in the Fe–Mn–O *** interaction can lead to a rebalancing of the electron density around Mn³⁺atoms,mitigating the asymmetric electron density distribution caused by the d4 configuration of the lone Mn³⁺and suppressing the Jahn-Teller effect of Mn^(3+).Moreover,the synergistic effects between Fe and Mn can provide a more balanced charge distribution,reducing extreme changes to the charge state of oxygen atoms and decreasing the irreversible oxygen release caused by anionic redox reactions during deep sodium extraction,thereby enhancing the material’s *** in-depth study of the interaction mechanism at the microscopic level when co-doping Fe and Mn offers valuable insights for the rational design and development of high-performance cathode materials.

关键词： First-principles calculations Sodium-ionbatteries Layered oxides NaFe_(3/8)Mn_(3/8)O_(2)

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王朔小说语言的话语权力意识

西北大学学报（哲学社会科学版） 2011年第4期41卷 147-151页

作者：白振有延安大学文学院陕西延安716000

王朔在我国社会转型时期登上文坛,他以调侃、反讽及新京味儿语言吸引着人们的阅读兴趣,而在其语言的深层却隐含着争取话语权力的意识。当这种意识从觉醒到张扬以至于膨胀时,他的创作语言也逐渐变为一种能指的游戏,忽视了对作品意义的建... 详细信息

王朔在我国社会转型时期登上文坛,他以调侃、反讽及新京味儿语言吸引着人们的阅读兴趣,而在其语言的深层却隐含着争取话语权力的意识。当这种意识从觉醒到张扬以至于膨胀时,他的创作语言也逐渐变为一种能指的游戏,忽视了对作品意义的建构,最终导致他在20世纪90年代后期淡出文坛。

关键词：话语权力意识觉醒张扬膨胀

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现行出口退税管理体制缺陷与完善

特区经济 2008年第2期 139-140页

作者：游振宇铜陵学院教务处安徽铜陵244000

本文认为,随着出口退税改革的深入,应对现行出口退税中的管理制度法制建设、出口退税资金来源等管理体制方面进行相应改革和完善,为出口退税新政的顺利运行提供可靠的管理制度保障。

关键词：出口退税管理体制出口退税资金

Enhanced quality of Al2O3/SiC gate stack via microwave plasma annealing

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Rare Metals 2024年第10期43卷 5362-5371页

作者： Nan-Nan you Xin-Yu Liu Qian Zhang zhen Wang Jia-Yi Wang Yang Xu Xiu-Yan Li Yu-zheng Guo Sheng-Kai Wang High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of Microelectronics of the Chinese Academy of Sciences School of Integrated Circuits University of Chinese Academy of Sciences School of Electrical Engineering and Automation Wuhan University Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jiao Tong University

The high-quality gate dielectric on silicon carbide （SiC） surface is critical to fabricate high-performance SiC metal-oxide-semiconductor field-effect transistors（MOSFETs）.This research employs microwave plasma annealing （MPA） to obtain high-quality Al2O3/SiC gate *** designing MPA atmosphere and optimizing the plasma power,the SiC MOS capacitor with a Al2O3dielectric film shows the enhanced *** interface state density is reduced by 1 order of magnitude to 6×1011cm-2·eV-1,the breakdown electric field is increased,and the voltage shift is effectively suppressed Besides,the mechanism of MPA process is discussed in terms of the thermal effect and reactant species.X-ray photoelectron spectroscopy （XPS） results unveil oxygen plasma plays the main *** plasma power during the MPA process results in defect repairs of the firstneighbor Al-O bonding and partial removal of Al-O-H bond from the interface *** study demonstrates that MPA process is an effective option to realize highquality dielectric and interface on SiC.

关键词： Al2O3 Defect repairs Metal–oxide–semiconductor Microwave plasma annealing Silicon carbide X-ray photoelectron spectroscopy

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煤矿软岩巷道支护动态信息化设计方法研究

煤炭技术 2014年第10期33卷 107-109页

作者：张幼振中煤科工集团西安研究院有限公司西安710077

针对煤矿软岩巷道变形破坏规律各异,缺乏可靠支护方法的技术难题,深入分析了动态信息化设计的原理与应用,提出煤矿软岩巷道支护中应首先深入分析巷道矿压显现规律,开展巷道围岩变形破坏机理研究,开发出具有针对性的支护设计方案,最终形... 详细信息

针对煤矿软岩巷道变形破坏规律各异,缺乏可靠支护方法的技术难题,深入分析了动态信息化设计的原理与应用,提出煤矿软岩巷道支护中应首先深入分析巷道矿压显现规律,开展巷道围岩变形破坏机理研究,开发出具有针对性的支护设计方案,最终形成动态信息化设计方法。该方法在煤矿井下现场得到了有效应用,为类似条件矿井提供了有益的借鉴。

关键词：巷道支护软岩巷道动态信息化设计

基于Dempster-Shafter信息融合的井下定向钻孔轨迹预测

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煤矿安全 2009年第4期40卷 31-33页

作者：张幼振煤炭科学研究总院西安研究院陕西西安710054

针对煤矿井下定向长钻孔轨迹预测中存在的问题,提出了应用D-S证据理论将瓦斯抽采钻孔施工的地质条件、钻具组合条件和钻进工艺参数3部分信息进行融合,并结合现场实例对钻孔轨迹进行预测。融合结果表明:该方法为煤矿井下定向钻孔施工提... 详细信息

针对煤矿井下定向长钻孔轨迹预测中存在的问题,提出了应用D-S证据理论将瓦斯抽采钻孔施工的地质条件、钻具组合条件和钻进工艺参数3部分信息进行融合,并结合现场实例对钻孔轨迹进行预测。融合结果表明:该方法为煤矿井下定向钻孔施工提供了参考,弥补了单纯使用测斜仪器的不足,从而提高钻孔施工中钻孔轨迹的预测精度和预测效率。

关键词：信息融合 D—S理论钻孔轨迹预测