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Recent Advances on Polyoxometalate-Based Ion-Conducting Electrolytes for Energy-Related Devices

Energy & Environmental Materials 2023年第2期6卷 262-274页

作者： dongming cheng Ke Li Hongying Zang Jiajia Chen Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education at Universities of Jilin Province Faculty of ChemistryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringCollaborative Innovation Centre of Chemistry for Energy MaterialsXiamen UniversityXiamen 361005China

Solid-state electrolytes have attracted considerable attention in new energyrelated devices due to their high safety and broad application ***(POMs)are a kind of molecular-level cluster compounds with unique *** recent years,owing to their abundant physicochemical properties(including high ionic conductivity and reversible redox activity),POMs have shown great potential in becoming a new generation of solid-state *** this review,an overview is investigated about how POMs have evolved as ion-conducting materials from basic research to novel solid-state electrolytes in energy ***,some expressive POM-based ion-conducting materials in recent years are introduced and classified,mainly inspecting their structural and functional *** that,it is further focused on the application of these ionconducting electrolytes in the fields of proton exchange membranes,supercapacitors,and ion *** addition,some properties of POMs(such as inherent dimension,capable of forming stable hydrogen bonds,and reversible bonding to water molecules)enable these functional POM-based electrolytes to be employed in innovative applications such as ion selection,humidity sensing,and smart ***,some fundamental recommendations are given on the current opportunities and challenges of POM-based ion-conducting electrolytes.

关键词： energy devices ion conduction polyoxometalates solid-state electrolytes

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A universal multifunctional dual cation doping strategy towards stabilized ultra-high nickel cobalt-free lithium layered oxide cathode

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Journal of Energy Chemistry 2024年第8期95卷 296-305,I0007页

作者： Yabin Shen dongming Yin Limin Wang Gang Huang Yong cheng Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450002HenanChina State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina

Ultra-high nickel cobalt-free lithium layered oxides are promising cathode material for lithium-ion batteries(LIBs)because of their relatively high capacity and low ***,the high nickel content would induce bulk structure degradation and interfacial environment deterioration,and the absence of Co element reduces the lithium diffusion kinetics,severely limiting the performance liberation of this kind of ***,a multifunctional Ti/Zr dual cation co-doping strategy has been employed to improve the lithium storage performance of LiNi_(0.9)Mn_(0.1)O_(2)(NM91)*** the one hand,the Ti/Zr co-doping weakens the Li^(+)/Ni^(2+)mixing through magnetic interactions due to the inexistence of unpaired electrons for Ti^(4+)and Zr^(4+),increasing the lithium diffusion rate and suppressing the harmful coexistence of H1 and H2 *** the other hand,they enhance the lattice oxygen stability because of the strong Ti-O and Zr-O bonds,inhibiting the undesired H3 phase transition and lattice oxygen loss,improving the bulk structure and cathode-electrolyte interface *** a result,the Ti/Zr co-doped NM91(NMTZ)exhibits a 91.2%capacity retention rate after 100 cycles,while that of NM91 is only82.9%.Also,the NMTZ displays better rate performance than NM91 with output capacities of 115 and93 mA h g^(-1)at a high current density of 5 C,***,the designed NMTZ could enable the full battery to deliver an energy density up to 263 W h kg^(-1),making the ultra-high nickel cobaltfree lithium layered oxide cathode closer to practical applications.

关键词： Lithium-ion battery Ultra-high nickel cobalt-free cathode Ti/Zr co-doping Li^(+)/Ni^(2+)mixing Lattice oxygen stability

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Oxygen vacancy engineering of calcium cobaltate:A nitrogen fixation electrocatalyst at ambient condition in neutral electrolyte

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Nano Research 2021年第2期14卷 501-506页

作者： Xinyu Chen Ke Li Xiaoxuan Yang Jiaqi Lv Sai Sun Siqi Li dongming cheng Bo Li Yang-Guang Li Hong-Ying Zang Key Laboratory of Polyoxometalate Science of the Ministry of Education Faculty of ChemistryNortheast Normal UniversityChangchun 130024China

In order to sustainably transform N2 to ammonia(NRR)using electrocatalysts under mild ambient condition,it is urgent to design and develop non-nobel metal nanocatalysts that are inexpensive and suitable for ***,a calcium metalate catalyst CaCoO_(x)with oxygen vacancies was synthesized and used as an electrocatalyst for NRR for the first time,whose morphology can be controlled by the calcination temperature and the heating *** the optimal conditions,the CaCoO_(x)catalyst achieved the yield of nitrogen conversion to ammonia of 16.25μg·h^(-1)·mg_(cat.)^(-1)at the potential of-0.3 V relative to the reversible hydrogen electrode(RHE)with a Faraday efficiency of 20.51%.The electrocatalyst showed good stability even after 12 times recyclability under environmental conditions and neutral ***,the electrocatalytic nitrogen reduction performance of CaFeO_(x),CaNiO_(x),CaCuO_(x)was *** earth-rich transition metals also exhibited certain NRR electrocatalytic capabilities,which provided a door for further development of inexpensive and easily available transition metal as nitrogen reduction electrocatalysts.

关键词： nitrogen fixation oxygen vacancy electrocatalysis calcium cobaltate nanoplates

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Proton-Conducting Polyoxometalates as Redox Electrolytes Synergistically Boosting the Performance of Self-Healing Solid-State Supercapacitors with Polyaniline

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CCS Chemistry 2021年第3期3卷 1649-1658页

作者： dongming cheng Bo Li Sai Sun Li-Jie Zhu Ying Li Xing-Long Wu Hong-Ying Zang Key Lab of Polyoxometalate Science of Ministry of EducationKey Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin ProvinceFaculty of ChemistryNortheast Normal UniversityChangchun 130024

Energy storage devices with high volumetric and gravimetric capacitance are in urgent demand due to the booming market of portable and wearable *** redox-active molecules as electrolytes is a strategy to improve the capacitance and energy density of solid-state supercapacitors(SCs).In this study,polyoxometalates(POMs)are applied as proton conductors and redox mediators in polyvinyl alcohol(PVA)electrolytes,which increase the capacitance of obtained SCs with polyaniline(PANI).H_(3)PMo_(12)O_(40)-loaded PANI electrodes provide pseudocapacitance with an eight-electron Faraday reaction in a charge–discharge *** has rarely been reported in SCs *** largest capacitance of SCs with H_(3)PMo_(12)O_(40)and H_(3)PW_(12)O_(40)as electrolytes is 7.69 F/cm^(2)(3840 F/g)based on a single electrode at 0.5 mA/cm^(2).In addition,POM electrolytes exhibit excellent self-healing ability,which is attributed to the rich hydrogen-bonding network between POMs and *** study demonstrates that the capacitance of solid-state SCs is improved by using molecular redox-active electrolytes and showcases the potential of applying this strategy to other energy storage devices in the future.

关键词： polyoxometalates solid-state supercapacitors redox electrolytes proton conductors self-healing

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Hollow structured Fe@C nanorods for boosting dehydrogenation properties of α-AlH_(3)

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Nano Research 2024年第9期17卷 8184-8191页

作者： Yuan Zhao Qingshuang Wang dongming Yin Xiaoli Wang Shouliang Li Chunli Wang Long Liang Shaolei Zhao Limin Wang Yong cheng School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology College of Chemistry and Chemical EngineeringDezhou UniversityDezhou 253023China Henan Nayu New Material Co. Ltd.Xinxiang 453000China

α-AlH_(3)is regarded as one of the most promising hydrogen storage materials due to its high hydrogen storage capacity(10.1 wt.%,148 kg·m^(-3)).However,in practical applications,the associated hydrogen release temperature remains relatively *** effectively address this issue,hollow structured Fe@C nanorods derived from Fe-MOF are introduced as highly efficient catalyst to optimize the dehydrogenation properties ofα-AlH_(3).Comparatively,the initial hydrogen release temperature ofα-AlH_(3)+3 wt.%Fe@C is reduced to 94.2℃,which is significantly lower than that of pureα-AlH_(3)(137.8℃).At 100 and 120℃,it exhibits hydrogen capacities of 5.38 wt.%and 7.47 wt.%,respectively,whereas pureα-AlH_(3)only delivers hydrogen capacities of 0.24 wt.%and 5.94 wt.%under the same *** density functional theory(DFT)calculations further indicate that the existence of Fe@C catalyst can make the length of Al-H bond increase,which is more conducive to the release of *** results show that the synergistic effect of Fe and porous carbon in Fe@C nanorods can improve the hydrogen desorption kinetics ofα-AlH_(3),providing a good prospect for the application ofα-AlH_(3)in hydrogen storage fields.

关键词： Fe@C α-AlH_(3) dehydrogenation catalyst

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对应于U_q(sl_n)的弱Hopf代数的分类

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数学物理学报（A辑） 2012年第3期32卷 608-616页

作者：程东明河南科技大学数学与统计学院河南洛阳471003

作者把对应于U_q(sl_n)的弱Hopf代数的结构按代数结构和余代数结构进行分类.对应于U_q(sl_n)的弱Hopf代数的代数结构可以分解为U_q(sl_n)和多项式代数的直和.而对应于U_q(sl_n)的弱Hopf代数的余代数结构可按其Ext箭图进行分类.最后讨论... 详细信息

作者把对应于U_q(sl_n)的弱Hopf代数的结构按代数结构和余代数结构进行分类.对应于U_q(sl_n)的弱Hopf代数的代数结构可以分解为U_q(sl_n)和多项式代数的直和.而对应于U_q(sl_n)的弱Hopf代数的余代数结构可按其Ext箭图进行分类.最后讨论这些代数结构和余代数结构如何可搭配成弱Hopf代数.

关键词：弱Hopf代数分类分解 Ext箭图

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高维矩阵和Hopf代数的结构常数

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数学物理学报（A辑） 2011年第3期31卷 662-669页

作者：程东明河南科技大学数学与统计学院河南洛阳471003 浙江大学数学系杭州310027

该文研究Hopf代数的结构常数.首先,引入高维矩阵,并用高维矩阵刻画结合代数的结构常数.其次,在余代数中,引入结构常数的概念,并用高维矩阵来描述.还给出了预余代数成为余代数,以及预双代数成为双代数和Hopf代数的条件.

关键词：高维矩阵 Hopf代数结构常数

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Multidimensional regulation of Ti-Zr-Cr-Mn hydrogen storage alloys via Y partial substitution

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Nano Research 2024年第5期17卷 4211-4220页

作者： Haixiang Xiu Wanqiang Liu dongming Yin Nan Ding Wenfeng Qiao Shaolei Zhao Long Liang Cong Liu Shaohua Wang Qingshuang Wang Bingbing Chen Limin Wang Yong cheng School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences(CAS)Changchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China

High density and safe storage of hydrogen are the preconditions for the large-scale application of hydrogen ***,the hydrogen storage properties of Ti_(0.6)Zr_(0.4)Cr_(0.6)Mn_(1.4) alloys are systematically studied by introducing Y element instead of Ti element through vacuum arc *** the partial substitution of Y,a second phase of rare earth oxide is added in addition to the main suction hydrogen phase,C14 Laves *** to the unique properties of rare earth elements,the partial substitution of Y can not only improve the activation properties and plateau pressure of the alloys,but also increase the effective hydrogen storage capacity of the *** comprehensive properties of hydrogen storage alloys are improved by multidimensional regulation of rare earth *** them,Ti_(0.552)Y_(0.048)Zr_(0.4)Cr_(0.6)Mn_(1.4) has the best comprehensive *** alloy can absorb hydrogen without activation at room temperature and 5 MPa,with a maximum hydrogen storage capacity of 1.98 wt.%.At the same time,it reduces the stability of the hydride and the enthalpy change value,making it easier to release *** theoretical analysis and first-principle simulation,the results show that the substitution of Y element reduces the migration energy barrier of hydrogen and the structural stability of the system,which is conducive to hydrogen *** alloy has superior durability compared to the original alloy,and the capacity retention rate was 96.79%after 100 hydrogen absorption/desorption cycles.

关键词： AB_(2)-type hydrogen storage alloy rare earth element first-principles simulation multidimensional regulation

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广义积分收敛性的新判别法

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洛阳工学院学报 1989年第3期10卷 70-77页

作者：程东明

本文引进新的系统的广义积分判别法,它不仅比传统的判别法更加精细,而且避免了传统判别法需要寻找参照函数的困难。只要研究被积函数自身的性态,即可知其敛散性。

关键词：无穷积分瑕积分收敛发散

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无助焊剂条件下SnAgCu/Cu钎焊接头金属间化合物的生长规律

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热加工工艺 2017年第13期46卷 68-71页

作者：刘璐程东明卢显丽郑州大学物理工程学院河南郑州450000

对于大部分封装过程,往往采取添加助焊剂的方法来去除氧化,提高钎焊的质量,然而有一些比较特殊的光电器件,助焊剂的残留可能严重影响器件的寿命。本文研究在不使用助焊剂的情况下,SnAgCu/Cu接头时效条件下的显微组织及剪切强度。结果表... 详细信息

对于大部分封装过程,往往采取添加助焊剂的方法来去除氧化,提高钎焊的质量,然而有一些比较特殊的光电器件,助焊剂的残留可能严重影响器件的寿命。本文研究在不使用助焊剂的情况下,SnAgCu/Cu接头时效条件下的显微组织及剪切强度。结果表明,在真空无助焊剂条件下,在SnAgCu/Cu接头中形成了一层均匀连续的扇贝状IMC(Intermetallic compound)层,主要成分为Cu_6Sn_5。在时效过程中IMC层不断增厚,随着时效时间的延长,金属间化合物形态由扇贝状向长杆状和平坦的细碎颗粒转变;剪切强度呈现先增强后减弱的趋势,开裂位置由焊料内部向IMC层过渡。

关键词：助焊剂时效剪切强度金属间化合物

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