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Flexible quasi-solid-state sodium-ion full battery with ultralong cycle life,high energy density and high-rate capability

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Nano Research 2022年第2期15卷 925-932页

作者： chen-de zhao Jin-Zhi Guo Zhen-Yi Gu Xiao-Tong Wang Xin-Xin zhao Wen-Hao Li Hai-Yue Yu Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityJilin 130024China MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityJilin 130024China

Flexible power sources featuring high-performance,prominent flexibility and raised safety have received mounting attention in the area of wearable electronic ***,many great challenges remain to be overcome,notably the design and fabrication of flexible electrodes with excellent electrochemical performance and matching them with safe and reliable ***,a facile approach for preparing flexible electrodes,which employs carbon cloth derived from commercial cotton cloth as the substrate of cathode and a flexible anode,is proposed and *** promising cathode(NVPOF@FCC)with high conductivity and outstanding flexibility is prepared by efficiently coating Na_(3)V_(2)(PO_(4))_(2)O_(2)F(NVPOF)on flexible carbon cloth(FCC),which exhibits remarkable electrochemical performance and the significantly improved reaction *** importantly,a novel flexible quasi-solid-state sodium-ion full battery(QSFB)is feasibly assembled by sandwiching a P(VDF-HFP)-NaClO_(4) gel-polymer electrolyte film between the advanced NVPOF@FCC cathode and FCC *** the QSFBs are further evaluated in flexible pouch cells,which not only demonstrates excellent energy-storage performance in aspect of great cycling stability and high-rate capability,but also impressive flexibility and *** work offers a feasible and effective strategy for the design of flexible electrodes,paving the way for the progression of practical and sustainable flexible batteries.

关键词： flexible sodium-ion battery gel-polymer electrolyte quasi-solid-state carbon cloth Na_(3)V_(2)(PO_(4))_(2)O_(2)F

Ab initio study on mechanisms of singlet oxygen reaction with ethylene

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Chinese Journal of Chemistry 1994年第1期12卷 26-32页

作者： chen, de-zhao chen, Bao-Ji NING, Shi-Guangdepartment of Chemistry , Shandong Teachers’ University, Jinan, Shandong 250014, China department of Chemistry Shandong Teachers' University Jinan Shandong 250014 China

The reaction of singlet oxygen with ethylene has been studied at the ab initio level with both HF/3-21G and HF/6-31G basis sets, fully optimizing the geometries of the critical points. The transition state leading to the intermediate peroxirane from the initial reactants is found,Iocated at 81.71 kJ/mol above the dissociation limit. The vibrational analysis is done with two basis sets. From the results it can be seen that the frequencies have not been made an improvement obviously with augmented 6-31G compared to 3-21G basis; it follows that main reason for too high HF/3-21G frequency could mainly be the vibrational anharmonicity. The eigenvector corresponding to the single imaginary vibrational frequency is dominated by the larger O-O distance. The finding of the transition state confirms that the peroxirane minimum can be reachable passing through a peroxirane-like saddle point. In addition , the mechanisms of the reaction forming oxirane are discussed as well.

关键词： Ab initio singlet oxygen ethylene peroxirane oxirane.

Concurrent recycling chemistry for cathode/anode in spent graphite/LiFePO_(4) batteries:designing a unique cation/anion-co-workable dual-ion battery

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Journal of Energy Chemistry 2022年第1期31卷 166-171,I0005页

作者： Yun-Feng Meng Hao-Jie Liang chen-de zhao Wen-Hao Li Zhen-Yi Gu Meng-Xuan Yu Bo zhao Xian-Kun Hou Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityChangchun 130024JilinChina MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024JilinChina

With the increasing popularity of new en ergy electric vehicles,the dema nd for lithium-ion batteries(LIBs)has been growing rapidly,which will produce a large number of spent ***,recycling of spe nt LIBs has become an urge nt task to be solved,otherwise it will inevitably lead to serious environmental ***,a unique recycling strategy is proposed to achieve the concurrent reuse of cathode and anode in the spent graphite/LiFePO_(4) *** with such recycling process,a unique cathode composed of recycled LFP/graphite(RLFPG)with cation/anion-co-storage ability is designed for new-type dual-ion battery(DIB).As a result,the recycle-derived DIB of Li/RLFPG is established with good electrochemical performance,such as an initial discharge capacity of 117.4 mA h g^(-1) at 25 mA g^(-1) and 78% capacity retention after 1000 cycles at 100 mA g^(-1).The working mechanism of Li/RLFPG DIB is also revealed via in situ X-ray diffraction and electrode kinetics *** work not only presents a farreaching significance for large-scale recycling of spent LIBs in the future,but also proposed a sustainable and econo mical method to design n ew-type sec on dary batteries as recycling of spe nt LIBs.

关键词： Dual-ion batteries LiFePO_(4) Graphite Spenr lithium-ion batteries Recycle

全身振动疗法对偏瘫下肢痉挛和运动功能的影响

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吉林医学 2024年第10期45卷 2360-2363页

作者：陈钊德杜灿荣邬映超韦小翠龙耀翔广西医科大学第二附属医院

目的：探讨全身振动疗法对偏瘫下肢肌痉挛和运动功能的影响。方法：选取广西医科大学第二附属医院收治的脑卒中偏瘫下肢痉挛合并功能障碍患者50例为研究对象，随机分为试验组与对照组各25例。两组均给予常规康复训练，试验组在对照组基... 详细信息

目的：探讨全身振动疗法对偏瘫下肢肌痉挛和运动功能的影响。方法：选取广西医科大学第二附属医院收治的脑卒中偏瘫下肢痉挛合并功能障碍患者50例为研究对象，随机分为试验组与对照组各25例。两组均给予常规康复训练，试验组在对照组基础上给予全身振动疗法，共6周。治疗前与治疗后采用简化Fugl-Meyer运动功能评分、改良Ashworth量表评分及改良Barthel指数(mBI)分别评估，比较两组疗效。结果：治疗后，两组的简化Fugl-Meyer运动功能评分、改良Ashworth量表评分及mBI评分均明显优于组内治疗前评分，差异有统计学意义(P<0.05),试验组优于对照组，差异有统计学意义(P<0.05)。结论：常规康复训练配合全身振动能够改善偏瘫下肢运动功能，减轻偏瘫下肢痉挛，提高患者日常生活活动能力。

关键词：脑卒中偏瘫全身振动疗法痉挛下肢功能

Wettability and corrosion behavior between alkaline slag from sodium smelting of vanadium-titanium magnetite and refractory substrates

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Journal of Iron and Steel Research International 2024年第6期31卷 1399-1410页

作者： Fei zhao Zhi-wei Bian Hong-xin zhao de-sheng chen Zhang-fu Yuan Yu-lan Zhen Li-na Wang Tao Qi Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China National Engineering Research Center of Green Recycling for Strategic Metal Resources Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Hebei Zhongke Tongchuang Vanadium&Titanium Technology Co. Ltd.Hengshui 053000HeheiChina

The sodium smelting of vanadium-titanium magnetite can achieve the comprehensive utilization of Fe,V,and ***,the generation of alkaline slag during this process may cause damage to refractory *** wettability and corrosion behavior of alkaline slag on three types of refractory(MgO-C,SiC,and high alumina refractory)substrates were investigated at temperatures up to 1200℃.The effects of duration on the wettability of molten slag on SiC substrates were also *** showed that the high alumina refractory exhibited better wettability with the molten slag than the others,and thus,it is easier to be *** results of scanning electron microscopy coupled with energy dispersive spectroscopy showed that MgO-C and high alumina refractory substrates were severely *** was a visible and regular interfacial reaction layer between the slag and SiC refractory substrate,which was produced by the redox reaction between the metal oxides in the slag and the SiC refractory *** the increase in holding time,the interface layer expands and silico-ferrite phases are generated at the *** redox reaction between Fe_(2)O_(3) and SiC substrate is the main reason for the *** comparing the differences in wettability and corrosion behavior between the alkaline slag from sodium smelting of vanadium-titanium magnetite and MgO-C,SiC and high alumina refractories,it is concluded that SiC refractory has good corrosion resistance to the *** oxides in the slag accelerate the oxidation rate of SiC refractory.

关键词： Wettability Corrosion Alkaline slag-Contact angle Vanadium-titanium magnetite Refractory

Recent progress in lanthanide ions doped inorganic metal halide perovskites

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Journal of Rare Earths 2024年第2期42卷 237-250,I0001页

作者： Yiyan Zhang Tianyu zhao Guanying chen MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringState Key Laboratory of Urban Water Resource and EnvironmentKey Laboratory of Micro-systems and Micro-structuresMinistry of EducationHarbin Institute of TechnologyHarbin150001China

Benefiting from their large molar extinction coefficient,high carrier mobility,narrow and tunable emissions,inorganic metal halide perovskites(IMHPs) demonstrate great potential in various optoelectrical devices including solar cells,light emitting diodes and photodetectors in the past few *** ions doping,well-known as a modification method of semiconductors,has been extensively applied in IMHPs as *** metal ions have been doped in IMHPs including alkali metals,alkali earth metals,transition metals and lanthanide metals,which either improve their optical performances or induce intriguing brand-new *** them,lanthanide metals feature plentiful energy levels and stable optical properties and are one of the most noteworthy *** we review recent progress in lanthanide ions doped *** summarize Yb,Eu or Er ions singly doping in detail,which was the most investigated species in *** lanthanide ions are also reviewed ***,we introduce lanthanide ions multi-doped IMHPs and at last we put forward several potential development *** the interests in lanthanide ions doped IMHPs rise,researchers have made some achievements in the *** though,there are more unexplored *** there are review articles focusing on metal ions doped IMHPs or lanthanide ions doped perovskites,this review aims to provide an overall introduction of lanthanide ions doped *** review may help researchers learn about lanthanide ions doped IMHPs and is to inspire researchers to make further promotion in this field.

关键词： Halide perovskite Lanthanide Doping Rare earths

A whole-net cooperative positioning method based on CDGNSS and inter-vehicle ranging

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Chinese Journal of Aeronautics 2024年第2期37卷 401-416页

作者： Shan HU Hongbo zhao chen ZHUANG School of Electronics and Information Engineering Beihang UniversityBeijing 100191China

Relative positioning is recognized as an important issue for vehicles in urban ***-vehicle Cooperative Positioning(CP)techniques which fuse the Global Navigation Satellite System(GNSS)and inter-vehicle ranging have attracted attention in improving the performance of baseline estimation between ***,current CP methods estimate the baselines separately and ignore the interactions among the positioning information of different *** interactions are called’information coupling’.In this work,we propose a new multivehicle precise CP framework using the coupled information in the network based on the Carrier Differential GNSS(CDGNSS)and inter-vehicle *** demonstrate the benefit of the coupled information by deriving the Cramer-Rao Lower Bound(CRLB)of the float estimation in *** fully use this coupled information,we propose a Whole-Net CP(WN-CP)method which consists of the Whole-Net Extended Kalman Filter(WN-EKF)as the float estimation filter,and the Partial Baseline Fixing(PBF)as the ambiguity resolution *** WN-EKF fuses the measurements of all baselines simultaneously to improve the performance of float estimation,and the PBF strategy fixes the ambiguities of the one baseline to be estimated,instead of full ambiguity resolution,to reduce the computation load of ambiguity *** tests involving four vehicles were conducted in urban *** results show that the proposed WN-CP method can achieve better performance and meanwhile maintain a low computation load compared to the existing methods.

关键词： GNSS Cooperative positioning Baseline Ambiguity resolution Information coupling

High-ionicity fluorophosphate lattice via aliovalent substitution as advanced cathode materials in sodium-ion batteries

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InfoMat 2021年第6期3卷 694-704页

作者： Zhen-Yi Gu Jin-Zhi Guo Xin-Xin zhao Xiao-Tong Wang Dan Xie Zhong-Hui Sun chen-de zhao Hao-Jie Liang Wen-Hao Li Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchunJilinChina department of Chemistry Northeast Normal UniversityChangchunJilinChina Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhouGuangdongChina

As a cathode for sodium-ion batteries(SIBs),Na3V2(PO4)2F3(NVPF)with 3D open framework is a promising candidate due to its high working voltage and large theoretical ***,the severe capacity degradation and poor rate capability hinder its practical *** present study demonstrated the optimization of Na-storage performance of NVPF via delicate lattice *** substitution of V^(3^(+))at Na^(+)in NVPF induces the generation of electronic defects and expansion of Na^(+)-migration channels,resulting in the enhancement in electronic conductivity and acceleration of Na^(+)-migration *** is disclosed that the formed stronger Na O bonds with high ionicity than V O bonds lead to the significant increase in structural stability and ionicity in the Na^(+)-substituted NVPF(NVPF-Nax).The aforementioned effects of Na^(+)substitution achieve the unprecedented electrochemical performance in the optimized Na_(3.14)V1.93Na0.07(PO_(4))_(2)F_(3)(NVPF-Na_(0.07)).As a result,NVPF-Na0.07 delivers a high-rate capability(77.5 mAh g^(−1)at 20 C)and ultralong cycle life(only 0.027%capacity decay per cycle over 1000 cycles at 10 C).Sodium-ion full cells are designed using NVPF-Na0.07 as cathode and Se@reduced graphene oxide as *** full cells exhibit excellent wide-temperature electrochemical performance from−25 to 25C with an outstanding rate capability(96.3 mAh g^(−1)at 20 C).Furthermore,it delivered an excellent cycling performance over 300 cycles with a capacity retention exceeding 90%at 0.5 C under different *** study demonstrates a feasible strategy for the development of advanced cathode materials with excellent electrochemical properties to achieve high-efficiency energy storage.

关键词： cathode full cell ionicity Na3V2(PO4)2F3 sodium-ion batteries

From ore to MOF: A case of MIL-100(Fe) production from iron ore concentrates

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Progress in Natural Science:Materials International 2024年第01期34卷 66-73页

作者： Miao Chang Chiyao Tang Chong-chen Wang chen zhao Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation School of Environment and Energy Engineering Beijing University of Civil Engineering and Architecture

Within this work, iron ore concentrates instead of elemental iron Fe0and iron salts like Fe（NO3）3and FeCl3were selected as iron source to prepare MIL-100（Fe）(labeled as MIL-100（Fe）-ore). The corresponding synthesis cost is reduced to half of the MIL-100（Fe） produced from elemental iron and iron salts. As well, the unreacted iron ore concentrates can be easily separated from the as-prepared MIL-100（Fe）-ore by magnetic to facilitate the purification process, free of the strong acids to wash the residual iron. The as-obtained MIL-100（Fe）-ore with Langmuir surface area up to 2281.6 m2g-1displayed long-term chemical stability. Furthermore, the sorption capacity of MIL-100（Fe）-ore towards malachite green（MG） is up to 522.3 mg g-1at 25℃ and initial pH = 3.2, higher than that of MIL-100（Fe） yielded by conventional hydrothermal process. Finally, the production cost and life cycle assessment of MIL-100（Fe）-ore were compared with other traditional production procedures. The results revealed that our work greatly reduced the synthesis cost and enhanced the environmental sustainability.

关键词： Metal-organic framework Iron ore concentrates Adsorption Life cycle assessment