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Post-tunable salt gel electrolytes toward flexible supercapacitor switches

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Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： Hui Wang Shuang Chen Xuming Liu Qin Zhang Xin Liu Polymeric and Soft materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012JilinChina Polymeric and Soft materials Laboratory School of Chemical Engineering and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012JilinChina

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes,and ***,inherent weaknesses in ionic conductivity,mechanical properties,and water retention of hydrogel electrolytes seriously hinder their *** by the hardness conversion of sea cucumber skin,a conductivity and mechanics dual-tunable salt gel electrolyte is successfully *** salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate(SAT).Meanwhile,the salt gels spontaneously grow a layer of“armor”through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***,this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance:258.6 mF cm^(-2)),and the capacitance retention rate could still reach 86.9%after 3000 cycles at high ***,the salt gel supercapacitor is potentially used in over-heat alarm *** is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics,and flexible robots.

关键词： Supercapacitors Salt gels Reversible phase transition Post-tuning Conductivity switching

Flow behavior and dynamic softening mechanism of Pt−10Ir precious alloy

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 225-242页

作者： Xin-pei ZHANG Jun-jie HE Lin PI Quan FU Wen-yan ZHOU Jun CHENG Sheng-wen BAI Xuan ZHOU Yi LIU Yong MAO materials Genome institute School of Materials and EnergyYunnan UniversityKunming 650091China Kunming Precious materials&Technology Co. Ltd.Yunnan Precious Metals Laboratory Co.Ltd.Sino-Platinum Metals Co.Ltd.Kunming 650106China Kunming institute of Precious Metals Kunming 650106China State Key Laboratory of advanced Technologies for Comprehensive Utilization of Platinum Metals Sino-Platinum Metals Co.Ltd.Kunming 650106China Shaanxi Key Laboratory of Biomedical Metal materials Northwest Institute for Non-ferrous Metal ResearchXi’an 710016China College of materials Science and Engineering Chongqing UniversityChongqing 400044China

The hot deformation behavior of Pt−10Ir alloy was studied under a wide range of deformation *** a low deformation temperature(950−1150℃),the softening mechanism is primarily dynamic *** addition,dynamic recrystallization by progressive lattice rotation near grain boundaries(DRX by LRGBs)and microshear bands assisted dynamic recrystallization(MSBs assisted DRX)coordinate the ***,it is difficult for the dynamic softening to offset the stain hardening due to a limited amount of DRXed *** a high deformation temperature(1250−1350℃),three main DRX mechanisms associated with strain rates occur:DRX by LRGBs,DRX by a homogeneous increase in misorientation(HIM)and geometric DRX(GDRX).With increasing strain,DRX by LRGBs is enhanced gradually under high strain rates;the“pinch-off”effect is enhanced at low strain rates,which was conducive to the formation of a uniform and fine microstructure.

关键词： platinum alloy hot deformation microstructure evolution dynamic recovery dynamic recrystallization

Improved oxygen electrocatalysis at Fe N4 and Co N4 sites via construction of axial coordination

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Chinese Chemical Letters 2025年第2期36卷 482-487页

作者： Ze Zhang Lei Yang Jin-Ru Liu Hao Hu Jian-Li Mi Chao Su Bei-Bei Xiao Zhi-Min Ao School of Energy and Power Engineering Jiangsu University of Science and Technology institute for Computation in Molecular and materials Science School of Chemistry and Chemical Engineering Nanjing University of Science and Technology institute for advanced materials School of Materials Science and Engineering Jiangsu University advanced Interdisciplinary institute of Environment and Ecology Beijing Normal University

The quest for efficient and durable catalysts using abundant resources has garnered significant interest in the field of bifunctional oxygen *** this contribution,we have designed a FeN4or CoN4embedded graphene-based bilayer as active layer and TMC3or TMN3doped graphene as supporting layer,named as FeN4/TMC3or FeN4/TMN3and CoN4/TMC3or CoN4/TMN3,wherein TM strands for transition *** on density functional theory calculations,our results demonstrate that the interaction formed between dual metal atoms in the bilayer interspace leads to the coordination environment altered from flat four-coordination to spatial five-coordination,further stabilizing the bilayer structure and impairing its affinity toward the O-containing *** to thermodynamic analysis,the bilayers of CoN4/CoN3,FeN4/FeC3,FeN4/CoC3,FeN4/NiC3,FeN4/ZnC3,FeN4/FeN3,FeN4/CrN3and FeN4/ZnN3are attractively promising for bifunctional oxygen electrocatalysis due to the small overpotential differenceΔη between oxygen reduction and oxygen evolution that are less than 1 *** functional theory calculations combined with machine learning analysis directly identify the key role played by the interbinding formed between bilayers,that boosts catalytic activity,which establishes a predictable framework for a fast screen for graphene-based bilayer vertical *** work opens up a new path for designing the efficient electrocatalysts via modification of coordination environment.

关键词： Density functional theory Machine learning Oxygen electrocatalysis Thermodynamic analysis

Dual-phase interface engineering via parallel modulation strategy for highly reversible Zn metal batteries

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Journal of Energy Chemistry 2025年第2期101卷 163-174页

作者： Zhean Bao Yang Wang Kun Zhang Guosheng Duan Leilei Sun Sinan Zheng Bin Luo Zhizhen Ye Jingyun Huang School of materials Science and Engineering State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University institute of Wenzhou Zhejiang University institute of Thermal Science and Power Systems Zhejiang University Longmen Laboratory of Luoyang

The reversibility and stability of aqueous Zn metal batteries（AZMBs） are largely limited by Zn dendrites and interfacial parasitic ***,we propose a parallel modulation strategy to boost the reversibility of the Zn anode by introducing N,N,N',N'-tetramethylchloroformamidinium hexafluorophosphate（TCFH） as an additive in the *** is composed of PF6-and TN+with opposite ***6-can spontaneously induce the in-situ generation of ZnF2solid electrolyte interface（SEI） on the anode,which can improve the transport kinetics of Zn2+at the interface,thus promoting the rapid and uniform deposition of Zn as well as inhibiting the growth of *** addition,TN+is enriched at the anode surface during Zn deposition through the anchoring effect,which brings a reconfiguration of the ion/molecule *** anchored-TN+reduces the concentrations of H2O and SO42-,sufficiently restraining the parasitic *** to the dual-phase interface engineering constructed of PF6-and TN+in parallel,the symmetric cell with the proposed electrolyte survives long cycling stability over750 h at 20 mA cm-2,10 mAh *** study offers a distinct viewpoint to the multidimensional optimization of Zn anodes for high-performance AZMBs.

关键词： Anchoring effect Aqueous Zn metal batteries Electrolyte additive Solid electrolyte interface Zn anode

Efficient propane dehydrogenation catalyzed by Ru nanoparticles anchored on a porous nitrogen-doped carbon matrix

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Chinese Chemical Letters 2025年第2期36卷 230-233页

作者： Tianyi Yang Fangxi Su Dehuan Shi Shenghong Zhong Yalin Guo Zhaohui Liu Jianfeng Huang State Key Laboratory of Coal Mine Disaster Dynamics and Control Institute of Advanced Interdisciplinary StudiesSchool of Chemistry and Chemical EngineeringChongqing University Key Laboratory of advanced materials Technologies International (HongKong Macao and Taiwan) Joint Laboratory on Advanced Materials TechnologiesCollege of Materials Science and EngineeringFuzhou University

Propane dehydrogenation （PDH） is a vital industrial process for producing propene,utilizing primarily Cr-based or Pt-based *** catalysts often suffer from challenges such as the toxicity of Cr,the high costs of noble metals like Pt,and deactivation issues due to sintering or coke formation at elevated *** introduce an exceptional Ru-based catalyst,Ru nanoparticles anchored on a nitrogendoped carbon matrix （Ru@NC）,which achieves a propane conversion rate of 32.2%and a propene selectivity of 93.1%at 550°C,with minimal coke deposition and a low deactivation rate of 0.0065 *** using techniques like TEM and XPS,along with carefully-designed controlled experiments,reveal that the notable performance of Ru@NC stems from the modified electronic state of Ru by nitrogen dopant and the microporous nature of the matrix,positioning it as a top contender among state-of-the-art PDH catalysts.

关键词： Electronic interaction Porous carbon matrix Propane dehydrogenation Ru nanoparticles Ru@NC

Taming of trinitromethyl-oxadiazole to access high density and high oxygen balance via a dual modulation strategy

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Defence Technology(防务技术) 2025年第1期43卷 142-149页

作者： Jinya Zhang Teng Fei Jingwei Meng Jinxiong Cai Lei Zhang Siping Pang Chunlin He School of materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China Experimental Center of advanced materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China hongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China

Energetic compounds bearing the trinitromethyl group are garnering broad attraction as potential candidates for a new generation of high energy dense *** this work,an effective dual modulation strategy involving both molecular isomerization and crystal morphology control was employed to design and optimize trinitromethyl-oxadiazole with improved comprehensive *** this dual strategy,3,5-bis(trinitromethyl)-1,2,4-oxadiazole(3)was synthesized,resulting in the formation of two distinct crystal morphologies(needle and sheet)corresponding to two crystal forms(3-a and3-b).Encouragingly,while maintaining ultra-high oxygen balance(21.73%),3 achieves impressive densities(1.97-1.98 g/cm^(3)).To our knowledge,the density of 1.98 g/cm^(3)for 3-a sets a new record among that of nitrogen-rich monocyclic ***,practical crystal morphology prediction was creatively introduced to guide the experimental crystallization conditions of 3,increasing the impact sensitivity and friction sensitivity from 1 J to 80 N(3-a)to 10 J and 240 N(3-b),***,the crystal structural analyses and theoretical calculations were conducted to elucidate the reasons of differences between 3-a and 3-b in density and *** work provides an efficient strategy to enhance performance of trinitromethyl derivatives,broadening the path and expanding the toolbox for energetic materials.

关键词： Energetic materials High oxygen balance High density Dual modulation Trinitromethyl group

AlO2: A novel two-dimensional material with a high negative Poisson's ratio for the adsorption of volatile organic compounds

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Chinese Chemical Letters 2025年第2期36卷 557-563页

作者： Xinghong Cai Qiang Yang Yao Tong Lanyin Liu Wutang Zhang Sam Zhang Min Wang Chongqing Key Laboratory for advanced materials and Technologies of Clean Energies School of Materials and EnergySouthwest University BatteroTech Co. Ltd. School of Astronautics Harbin Institute of Technology Zhengzhou Research institute Harbin Institute of Technology

We propose and investigate a novel stable two-dimensional（2D） AlO2with anomalous stoichiometric ratios based on first-principles calculation. 2D AlO2has metallic properties. It possesses the rare in-plane and out-of-plane negative Poisson's ratio（NPR） phenomenon, originating from its special sawtooth-like structure. The absolute value of the NPR decreases as the number of layers increases. The adsorption of volatile organic compounds（VOCs） including CH2O, C2H3Cl and C6H6by AlO2exhibit small adsorption distance, large adsorption energy, large charge transfer and significant density of states（DOS） changes,indicating the presence of strong interactions. The desorption time of each gas molecule on the AlO2surface is also evaluated, and the results further suggest that the desorption of VOCs can be controlled by changing the temperature to achieve the recycling of AlO2. These interesting properties make 2D AlO2a promising material for electronic, mechanical and sensing applications for VOCs.

关键词： AlO2 First-principles calculations Negative Poisson's ratio Two-dimensional material VOCs

Hybrid conductive-lithophilic-fluoride triple protection interface engineering:Dendrite-free reverse lithium deposition for high-performance lithium metal batteries

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Journal of Energy Chemistry 2025年第2期101卷 416-428页

作者： Huiying Li Chang Hong Runming Tao Xiaolang Liu Jianxing Wang Jianyu Chen Shuhao Yao Jiazhi Geng Guang Zheng Jiyuan Liang Key Laboratory of Optoelectronic Chemical materials and Devices of Ministry of Education School of Optoelectronic Materials & Technology Jianghan University Applied materials Division Argonne National Laboratory State Key Laboratory of Organic Electronics and Information Displays & institute of advanced materials (IAM) Nanjing University of Posts & Telecommunications

Lithium metal batteries（LMBs） with high energy density are impeded by the instability of solid electrolyte interface（SEI） and the uncontrolled growth of lithium（Li） *** mitigate these challenges,optimizing the SEI structure and Li deposition behavior is the key to stable *** study novelty proposes a facile synthesis of MgF2/carbon（C） nanocomposite through the mechanochemical reaction between metallic Mg and polytetrafluoroethylene（PTFE） powders,and its modified polypropylene（PP）separator enhances LMB *** in-situ formed highly conductive fluorine-doped C species play a crucial role in facilitating ion/electron transport,thereby accelerating electrochemical kinetics and altering Li deposition *** cycling,the in-situ reaction between MgF2and Li leads to the formation of LiMg alloy,along with a LiF-rich SEI layer,which reduces the nucleation overpotential and reinforces the interphase strength,leading to homogeneous Li deposition with dendrite-free *** from these merits,the Li metal is densely and uniformly deposited on the MgF2/C@PP separator side rather than on the current collector ***,the symmetric cell with MgF2/C@PP exhibits superb Li plating/stripping performance over 2800 h at 1 mA cm-2and 2 mA h *** importantly,the assembled Li@MgF2/C@PPILiFePO4full cell with a low negative/positive ratio of 3.6delivers an impressive cyclability with 82.7% capacity retention over 1400 cycles at 1 C.

关键词： Lithium metal batteries Mechanochemical reaction MgF2 Reverse deposition Separator modification

Artificial self-powered and self-healable neuromorphic vision skin utilizing silver nanoparticle-doped ionogel photosynaptic heterostructure

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Journal of Semiconductors 2025年第1期46卷 205-213页

作者： Xinkai Qian Fa Zhang Xiujuan Li Junyue Li Hongchao Sun Qiye Wang Chaoran Huang Zhenyu Zhang Zhe Zhou Juqing Liu Key Laboratory of Flexible Electronics(KLoFE)&institute of advanced materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816China

Artificial skin should embody a softly functional film that is capable of self-powering,healing and sensing with neuromorphic ***,the pursuit of a bionic skin that combines high flexibility,self-healability,and zero-powered photosynaptic functionality remains *** this study,we report a self-powered and self-healable neuromorphic vision skin,featuring silver nanoparticle-doped ionogel heterostructure as *** localized surface plasmon resonance induced by light in the nanoparticles triggers temperature fluctuations within the heterojunction,facilitating ion migration for visual sensing with synaptic *** abundant reversible hydrogen bonds in the ionogel endow the skin with remarkable mechanical flexibility and self-healing *** assembled a neuromorphic visual skin equipped with a 5×5 photosynapse array,capable of sensing and memorizing diverse light patterns.

关键词： neuromorphic vision skin ionogel heterojuction lspr photosynapse