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Emerging catalytic materials for practical lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第1期76卷 127-145,I0004页

作者： Fangyi Shi Lingling Zhai qingqing liu Jingya Yu Shu Ping Lau Bao Yu Xia Zheng-Long Xu Department of Industrial and Systems Engineering Department of Applied PhysicsResearch Institute of Advanced Manufacturingthe Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina State Key Laboratory of Ultraprecision Machining Technology the Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057GuangdongChina

High-energy lithium-sulfur batteries(LSBs)have experienced relentless development over the past decade with discernible improvements in electrochemical ***,a scrutinization of the cell operation conditions reveals a huge gap between the demands for practical batteries and those in the *** sulfur loading,a high electrolyte/sulfur(E/S)ratio and excess anodes for lab-scale LSBs significantly offset their high-energy *** approach practical LSBs,high loading and lean electrolyte parameters are needed,which involve budding challenges of slow charge transfer,polysulfide precipitation and severe shuttle *** track these obstacles,the exploration of electrocatalysts to immobilize polysulfides and accelerate Li-S redox kinetics has been widely ***,this review aims to survey state-of-the-art catalytic materials for practical LSBs with emphasis on elucidating the correlation among catalyst design strategies,material structures and electrochemical *** also statistically evaluate the state-of-the-art catalyst-modified LSBs to identify the remaining discrepancy between the current advancements and the real-world *** closing,we put forward our proposal for a catalytic material study to help realize practical LSBs.

关键词： Lithium-sulfur battery Catalytic materials High sulfur loading Lean electrolyte

Silicon-based dielectric elastomer with amino-complexed hybrids towards high actuation performance

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Nano Materials Science 2024年第5期6卷 576-586页

作者： Zhengxing Dai qingqing liu Xiaodong Qi Nan Zhang Ting Huang Jinghui Yang Yong Wang School of Chemistry Southwest Jiaotong UniversityChengdu610031China Key Laboratory of Advanced Technologies of Materials Ministry of Education of ChinaSouthwest Jiaotong UniversityChengdu610031China

For improving the actuation performance at low electric fields of dielectric elastomers,achieving high dielectric constant(εr)and low modulus(Y)simultaneously has been targeted in the past decades,but there are few ways to accomplish *** contrast to the classical strategies such as incorporating plasticizers or ceramic to prepare the silicon-based dielectric elastomers,here,blending an amino-complexed hybrid(polyethyleneimine(PEI)-Ag)with polydimethylsiloxane(PDMS)elastomer is reported as an alternative strategy to tailor theεr and ***-Ag not only exhibits excellent dielectric enhancement properties but also minimizes the PDMS crosslinking through amino-complexed reaction between PEI and Pt *** prepared dielectric elastomers have aεr of 7.2@10^(3)Hz and Y of 1.14 MPa,leading to an actuation strain of 22.27%at 35 V/μ***,incorporating such novel hybrids based on dual amino-complexed effect on both matrix and particles sufficiently promotes the actuated performance of dielectric elastomers.

关键词： Flexible composites Dielectric property Electro-mechanical behaviour AgNPs

Asymptotic profile of solutions to the two-dimensional dissipative quasi-geostrophic equation

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Science China Mathematics 2010年第10期53卷 2733-2748页

作者： DONG BoQing & liu qingqing School of Mathematical Sciences,Anhui University,Hefei 230039,China 1. School of Mathematical Sciences Anhui University Hefei 230039 China

This paper is concerned with the asymptotic behavior of the two-dimensional dissipative quasigeostrophic *** on the spectral decomposition of the Laplacian operator and iterative techniques,we obtain improved L2 decay rates of weak solutions and derive more explicit upper bounds of higher order derivatives of *** also prove the asymptotic stability of the subcritical quasi-geostrophic equation under large initial and external perturbations.

关键词： quasi-geostrophic equation L2 decay asymptotic stability

Advanced polymer-based electrolytes in zinc-air batteries

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eScience 2022年第5期2卷 453-466页

作者： qingqing liu Ruiting liu Chaohui He Chenfeng Xia Wei Guo Zheng-Long Xu Bao Yu Xia Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)1037 Luoyu RdWuhan430074PR China State Key Laboratory of Ultraprecision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong Kong SARPR China

Zinc–air batteries(ZABs)are expected to be some of the most promising power sources for wearable and portable electronic devices and have received widespread research *** an ion conductor connecting anodes and cathodes,the electrolyte is critical for the overall performance of ZABs(e.g.,energy density,rechargeability,and operating voltage).Compared with liquid electrolytes,polymer-based electrolytes have superior characteristics for ZABs,such as negligible electrolyte leakage,three-phase interface stabilization,and dendrite *** this perspective,we focus on recent progress in polymer-based electrolytes for *** a brief introduction to ZABs and electrolytes,we emphasize the development of polymer-based electrolytes in terms of their intrinsic properties and interfacial ***,challenges and viable strategies are proposed for polymer-based electrolytes in *** hope that this work will provide useful guidance to spur the development of high-performance ZABs based on advanced polymer-based electrolytes.

关键词： Zinc–air batteries Electrolytes Interface Polymers Gels

GPP(composition of Ganoderma lucidum polysaccharides and Polyporus umbellatus polysaccharides) protects against DSS-induced murine colitis by enhancing immune function and regulating intestinal flora

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Food Science and Human Wellness 2022年第4期11卷 795-805页

作者： Liyuan Li Yannan Guo Qing Huang Xiaojin Shi qingqing liu Fang Wang Qingfei liu Kang Yu Zhao Wang MOE Key Laboratory of Protein Science School of Pharmaceutical SciencesTsinghua UniversityBeijing 100084China Tsinghua-Peking Center for Life Sciences Tsinghua UniversityBeijing 100084China Tianjin Research Institute for Advanced Equipment Tianjin 300300China Department of Clinical Nutrition and Department of Health Medicine Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730China

Previous study have demonstrated that a compound composed of water-soluable Ganoderma lucidum polysaccharides(GLP)and Polyporus umbellatus polysaccharides(PUP)in a ratio of 3:1 named GPP enhances innate immune function in mice through enhancing the function of macrophage cells and activity of natural killer(NK)*** in our research,we further investigated the effect of GPP on the diversity and composition of intestinal flora,and explored its effect on colitis model *** immunoregulatory verification experiments of GPP were conducted in both normal and DSS-induced mice *** research showed that GPP increased the diversity of intestinal microorganisms in mice with the extension of administration *** GPP intake attenuated DSS-induced colon injury,protected the splenic lymphocyte proliferation ability,enhanced the serum hemolysin synthesis,and increased peripheral phagocytes and NK cell activity in model *** of the predominant gene pathways of the bacterial microbiota showed that DNA repair and recombination,base mismatch repair pathways was stronger in GPP-treatment group than in control group,indicating the possible molecular mechanisms of immune function *** study showed that GPP regulated immune function in both health and colitis model,and had a positive effect on maintaining intestinal flora homeostasis.

关键词： Ganoderma lucidum polysaccharides Polyporus umbellatus polysaccharides Immune function Intestinal flora Colitis

High pressure effects on the crystal structure andelectric conductivity of perovskite like (Ca/Sr)_2CuO_2Cl_2 compounds

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Chinese Science Bulletin 2008年第18期53卷 2739-2742页

作者： liu qingqing WANG FuRen LI FengYing CHEN LiangChen YU RiCheng JIN ChangQing LI YanChun liu Jing College of Physics Peking University Beijing 100871 China Institute of Physics Chinese Academy of Sciences Beijing 100190 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

The crystal structure stability as well as electric conductance of (Sr/Ca)_2CuO_2Cl_2 compound with K_2NiF_4 structure was investigated up to 31 GPa using diamond anvil technique. It seems that (Sr/Ca)_2CuO_2Cl_2 is quite stable under pressure but with obvious anisotropic compressibility. The equation of state (EOS) obtained shows relative large bulk modulus.

关键词：高压反应电导体钙钛矿型复合物循环结构同步加速器

New quantum matters:Build up versus high pressure tuning

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Science China(Physics,Mechanics & Astronomy) 2013年第12期56卷 2337-2350页

作者： JIN ChangQing WANG XianCheng liu qingqing ZHANG SiJia FENG ShaoMin DENG Zheng YU RiCheng ZHU JingLong Beijing National Laboratory for Condensed Matter Physics & Institute of Physics Institute of PhysicsChinese Academy of Sciences

In this article we briefly review new quantum functional compounds primarily based on our recent works. We will highlight the effects of pressures on both materials synthesis and quantum tuning. The contents include （I）＂111＂-type iron based super- conducting system, （II） pressure induced superconductivity in topological insulators and （II/） the new diluted magnetic semi- conductors with decoupled spin charge doping.

关键词： quantum functional compound topological insulator superconductivity

Treatment with β-sitosterol ameliorates the effects of cerebral ischemia/reperfusion injury by suppressing cholesterol overload, endoplasmic reticulum stress, and apoptosis

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Neural Regeneration Research 2024年第3期19卷 642-649页

作者： Xiuling Tang Tao Yan Saiying Wang qingqing liu Qi Yang Yongqiang Zhang Yujiao Li Yumei Wu Shuibing liu Yulong Ma Le Yang Precision Pharmacy&Drug Development Center Department of PharmacyTangdu HospitalAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Clinical Pharmacy Jinling HospitalMedical School of Nanjing UniversityNanjingJiangsu ProvinceChina Department of Pharmacology School of PharmacyAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Anesthesiology The First Medical Center of Chinese PLA General HospitalBeijingChina Department of Anatomy Histology and Embryology and K.K.Leung Brain Research CentreAir Force Medical UniversityXi’anShaanxi ProvinceChina

β-Sitosterol is a type of phytosterol that occurs naturally in *** studies have shown that it has anti-oxidant,anti-hyperlipidemic,anti-inflammatory,immunomodulatory,and anti-tumor effects,but it is unknown whetherβ-sitosterol treatment reduces the effects of ischemic *** we found that,in a mouse model of ischemic stroke induced by middle cerebral artery occlusion,β-sitosterol reduced the volume of cerebral infarction and brain edema,reduced neuronal apoptosis in brain tissue,and alleviated neurological dysfunction;moreover,β-sitosterol increased the activity of oxygen-and glucose-deprived cerebral cortex neurons and reduced *** investigation showed that the neuroprotective effects ofβ-sitosterol may be related to inhibition of endoplasmic reticulum stress caused by intracellular cholesterol accumulation after ischemic *** addition,β-sitosterol showed high affinity for NPC1L1,a key transporter of cholesterol,and antagonized its *** conclusion,β-sitosterol may help treat ischemic stroke by inhibiting neuronal intracellular cholesterol overload/endoplasmic reticulum stress/apoptosis signaling pathways.

关键词： apoptosis blood-brain barrier β-sitosterol cerebral ischemia/reperfusion injury cholesterol overload cholesterol transport endoplasmic reticulum stress ischemic stroke molecular docking NPC1L1

Peroxidase-like single Fe atoms anchored on Ti_(3)C_(2)T_(x)MXene as surface enhanced Raman scattering substrate for the simultaneous discrimination of multiple antioxidants

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Nano Research 2023年第7期16卷 10053-10060页

作者： Hongyan Xi Hongfei Gu Yurui Han Tingting You Pengfei Wu qingqing liu Lirong Zheng Shuhu liu Qiang Fu Wenxing Chen Yukun Gao Yuting Wang Penggang Yin Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemical Physics School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of High Energy Physics Chinese Academy of ScienceBeijing 100029China School of Future Technology University of Science and Technology of ChinaHefei 230026China

Single-atom nanozymes(SAzymes)are emerging as promising alternatives to mimic natural enzyme,which is due to high atomic utilization efficiency,well-defined geometric,and unique electronic ***,Fe single atoms supported on Ti_(3)C_(2)T_(x)(Fe-SA/Ti_(3)C_(2)T_(x))with intrinsic peroxidase activity is developed,further constructing a sensitive Raman sensor array for sensing of five ***-SA/Ti_(3)C_(2)T_(x)shows excellent peroxidase-like performance in catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)with colorimetric reactions.X-ray adsorption fine structure(XAFS)reveals that the electron transport between the Ti_(3)C_(2)T_(x)and Fe atoms occurs along Fe-O-Ti ligands,meanwhile the density functional theory(DFT)calculations confirm the spontaneous dissociation of H_(2)O_(2)and the formation of OH ***,the peroxidase-like Fe-SA/Ti_(3)C_(2)T_(x)was used as surface enhanced Raman scattering(SERS)substrate of oxidized TMB(TMB+)and achieved satisfied signal amplification *** the blocking effects of free radical reactions,one-off identification of 5 antioxidants,including ascorbic acid(AA),uric acid(UA),glutathione(GSH),melatonin(Mel),and tea polyphenols(TPP),could be realized with this high identifiable catalytic *** principle could realize 100%distinguish accuracy combined with linear discriminant analysis(LDA)and heat map data analysis.A wide detection concentration ranges from 10^(-8)to 10^(-3)M for five antioxidants was also achieved.

关键词： single atom catalyst Ti_(3)C_(2)T_(x)MXene atomic interface site surface enhanced Raman scattering(SERS) antioxidants