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Strategic Design of High-Directional Scaffold Enabling Accelerated Kinetics for High-Loading Low-Temperature Lithium-Sulfur Batteries

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SSRN 2025年

作者： Shi, Junye Yu, Chenxi Ning, Yuchen Li, Bao Wang, Bao Zheng, Shumin Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai200433 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of Sciences Beijing100190 China School of Chemistry and Chemical Engineering Henan Normal University Xinxiang453007 China College of Chemistry and Materials Jiangxi Agricultural University Nanchang330045 China

Electronic market starves for efficient batteries at low temperatures. Herein, a free-standing and highly directional scaffold filled with NiCo-decorated carbon nanotube bushes (HDS-NCCNT) is synthesized and employed as a three-dimensional thick host for low-temperature lithium-sulfur (Li-S) batteries. This unique structure can ensure the high loading of active material and improve the sluggish reaction kinetics at low temperatures. The NCCNT bushes can further suppress the shuttle effect of lithium polysulfides and prolong the lifespan. As a result, the Li2S6@HDS-NCCNT cathode with a loading mass of 5 mg cm-2 exhibits a remarkable capacity of 1026 mAh g-1 at 0.1 C under -20 ℃. Even under -40 ℃, the Li2S6@HDS-NCCNT cathode also shows favorable performance with a high sulfur loading of 10 mg cm-2. This pioneering work demonstrates the rational design of components and architectures ranging from micrometer to nanometer scale, which inspires the development of high-loading Li-S batteries under cryogenic conditions. © 2025, The Authors. All rights reserved.

关键词： Lithium sulfur batteries

Effective and Eco-Friendly Lithium Recovery from High Mg/Li Ratio Brine by Dehehp and P507

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SSRN 2024年

作者： Li, Hemin Deng, Yuefeng Chen, Ji State Key Laboratory of Rare Earth Resources Utilization Green Chemistry and Process Laboratory Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun130022 China School of Applied Chemistry and Engineering University of Science and Technology of China Anhui Hefei230026 China

Due to the rapid development of lithium-ion batteries (LIBs), global lithium consumption has surged. China, the largest producer of LIBs, heavily relies on imported lithium to meet its production demands, while abundant lithium resources in the Qinghai-Tibet Plateau's salt lakes have remained unexploited due to high Mg/Li ratios. Solvent extraction methods are low cost, low energy consumption, and scalable industrially, while the dissolution loss of extractant and the use of acid in the stripping process limit its industrial potential. This paper introduces DEHEHP-P507 extraction system, where low dissolution loss DEHEHP acts as extractant and P507 lets water to be effective stripping agent. After determining the detailed parameters in the extraction and stripping, a whole countercurrent process containing eight-stage countercurrent extraction, two-stage countercurrent stripping, and a precipitation step for recycling Fe was conducted. More than 97.5% of lithium was recovered from the real brine of Da Qaidam salt lake, with the obtained stripping liquor containing approximately 7 g/L of Li+. From the brine to the stripping liquor, the Li+ concentration enriched to approximately 6 times its original concentration, while the Mg/Li ratio decreased from 87.89 to 1.41, a reduction of 62 times. Then, Li2CO3 products (purity>98%) were obtained from the stripping liquor by precipitation. Since the organic phase avoided contact with acids and alkalis thoroughly, the DEHEHP-P507 extraction system showed its eco-friendliness and efficiency on lithium recovery from high Mg/Li ratio bine, presenting attractive industrial prospects. © 2024, The Authors. All rights reserved.

关键词： Solvent extraction

Photothermal assisted CO2 photoreduction over hollow urchin-like structured TiO2@SnS2 heterojunction with enriched oxygen defects

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Chemical engineering Journal 2025年 516卷

作者： You, Feifei Li, Dazhao Wang, Dan Ge, Yuanyu Lu, Zhenqian Qi, Jian Li, Danyang College of Textile and Clothing Yancheng Institute of Technology Yancheng224051 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology Dezhou University Dezhou253023 China

Solar driving CO2 photoreduction represents a highly promising strategy that can not only reduce CO2 level in the atmosphere but also yield value-added chemicals. Herein, an urchin-like hollow structured hybrid with TiO2@SnS2 heterogeneous junction was designed and synthesized through a facile approach including hard-template method and hydrothermal process. When used as catalyst for photocatalytic CO2 reduction, the optimized sample exhibited exceptional activity with a CO yield rate of 52.86 µmol·g-1h−1 and durability during 4 cycles within 28 h. The enhanced performance could be attributed to i) the confinement effect of hollow structure enhancing the light capture and absorption owing to the multi-reflection/scattering of incident light in hollow cavity;ii) the constructed hetero-junction between TiO2 and SnS2 facilitating the transfer and separation of charge carriers and iii) photothermal effect induced by confinement effect of hollow structure through trapping the unused incident light and oxygen defects promoting the activation of CO2 molecules. We believed that this work could inspire further development in the field of synthesis of hollow structured catalysts as well as photocatalysis. © 2025 Elsevier B.V.

关键词： Titanium dioxide

Carbon Dioxide as a Temporary Protective Agent for Highly Efficient and Selective Access to Diols Via Ki-Catalyzed Hydration of Epoxides

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SSRN 2024年

作者： Zhang, Jingshun Wang, Xueke Hu, Hao Wang, Ziyi Wang, Li Zhang, Jinglai Gao, Guohua State Key Laboratory of Petroleum Molecular & Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Institute of Eco-Chongming 3663 North Zhongshan Road Shanghai 200062 20 Cuiniao Road Shanghai202162 China Henan Key Laboratory of Protection and Safety Energy Storage of Light Metal Materials College of Chemistry and Molecular Sciences Henan University Henan Kaifeng475004 China

The CO2 utilization had attracted a great attention in chemical synthesis. Herein, a strategy of CO2 as a temporary protective agent was disclosed and well applied to the KI-catalyzed hydration of epoxides to synthesized diols with high yields (87.8-98.9%) and selectivities (89.5-99.1%) at a low H2O/epoxide ratio of 1.5:1. Isotope labeling experiments using isotope-labeled water (H218O) confirmed that the strategy remained direct hydration of epoxides. Mechanistic experiments and density functional theory (DFT) calculations implied that CO2 as a temporary protective agent, protected the oxygen-negative intermediates formed from the ring opening of epoxides to generate carbonate anion, thereby safeguarding the hydration of epoxides against potential condensation reactions and simultaneously activate H2O for nucleophilic substitution reaction. Finally, CO2 could be automatically released later through the decarboxylation process. The strategy with excellent functional group tolerance, the viability from the gram-scale reaction, and the flue gas reaction will open up new avenues for applications of CO2 in the hydration of epoxides and inspire novel synthetic design by utilizing CO2 as a temporary protective agent. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

Enhanced electrodeposition and separation of metallic Cr from soluble K2CrO4 on a liquid Zn cathode

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Journal of Energy Chemistry 2020年第1期29卷 204-211,I0007页

作者： Wei Weng Zhi Wang Zhancheng Guo Shuqiang Jiao Mingyong Wang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Resource and Environmental Sciences Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and EnergyWuhan UniversityWuhan 430072HubeiChina Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Carbon contamination and the formation of low-valence oxides limit the preparation of refractory metals by molten salt *** this paper,a liquid Zn cathode is adopted for the electrochemical reduction of soluble K2CrO4 to metallic Cr in CaCl2-KCl molten *** is found that CrO4^2-can be directly electrochemically reduced to Cr via a six-electron-transfer step and low-valence Cr oxides is hardly *** reduction rate is obviously increased from 16.7 mgCrh^-1cm^-2 on the solid Mo cathode to58.7 mgCrh-1cm-2on liquid Zn *** electrodeposited Cr is distributed in liquid Zn *** contamination is effectively avoided due to the negligible solubility of carbon in the liquid Zn ***,Cr can be effectively separated and enriched to the bottom of liquid Zn under supergravity field,realizing the efficient acquisition of metallic Cr and recycling of liquid *** method herein provides a promising route for the preparation of refractory metals with high-purity by molten salt electrolysis.

关键词： Molten salt electrolysis Liquid Zn cathode Carbon contamination K2CrO4 Metallic Cr

Based on Peg Glycol Composite Phase Change Material Efficient of Solar Sustainable Freshwater Production

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SSRN 2024年

作者： Dong, Weixiong Cao, Xulei Tao, Haiyan Wang, Yaoyao Jia, Shuping Meng, Guihua Shihezi University China Xinjiang Key Laboratory of Novel Functional Materials Chemistry College of Chemistry and Environmental Sciences Kashi University Kashi844000 China College of Chemistry and Chemical Engineering Shihezi University State Key Laboratory of Green Process of Chemical Industry jointly built by the province and Ministry. Shihezi Xinjiang832003 China

To address the issue of current solar thermal conversion materials being unable to function continuously in the presence of intermittent solar radiation. The phase-change energy storage material polyethene glycol (PEG) is cleverly introduced into the interfacial evaporation material, polyacrylic acid (PAA) hydrogel is used as the leakproof support material to stabilize the PEG form, graphene oxide (GO) and nano silver (Ag NPs) are used as the solar thermal conversion medium. A novel interface evaporation three-dimensional network gel (PEG/PAA/GO-Ag) composite phase change material (PCM) was constructed by sol-gel-in-situ reduction methods. In the full spectrum range, 95.4% light absorption is achieved and matched well with the solar spectrum. At 1 kW·m-2 of sunlight, it seems that the evaporation rate was quite high at 2.14 kg·m-2·h-1, and the solar thermal conversion efficiency was also impressive at 91.2%. It's interesting to note that in the absence of the sun, the solar energy stored in PEG/PAA/GO-Ag is released through a phase transition, which allows it to continue evaporating clean water. This process seems to achieve a slightly lower evaporation rate of 0.73 kg·m-2·h-1, but still maintains a decent solar thermal conversion efficiency of 35.0%.Furthermore, the material demonstrates excellent performance stability in 10 consecutive heating and cooling cycle evaporation tests. It exhibits good cyclic stability and can be utilized for saltwater desalination and dye sewage treatment. © 2024, The Authors. All rights reserved.

关键词： Conversion efficiency

Reactive nano-essential oils for sustained release of essential oils and application to wallpaper

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Chinese Chemical Letters 2022年第1期33卷 320-323页

作者： Qiulian Hao Huan Peng Ruichen Zhao Jianze Wang Zhiguo Lu Jingwen Wang Jie Shen Yunwei Niu Zuobing Xiao Guiying Liu Jifu Hao Xin Zhang School of Pharmaceutical Science Shandong First Medical University&Shandong Academy of Medical SciencesTaian 271016China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Department of Pediatrics Capital Medical University Affiliated Beijing Anzhen HospitalBeijing 100029China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Shanghai Research Institute of Fragrance and Flavor Industry Shanghai 200232China School of Perfume and Aroma Technology Shanghai Institute of TechnologyShanghai 200233China

Essential oils are a volatile and aromatic substance with a variety of active biological ***,the excessive volatility and inconvenience of the use of essential oils limit their *** this study,we developed a reactive mesoporous silica nanoparticle(rMSNs)based on cyanuric chloride modification for essential oil encapsulation and commodity *** large pore volume and specific surface area of rMSNs facilitate the nanoparticles adhering to a large amount of essential oil and achieve the sustained release of essential oil,thus prolonging the fragrance retention time of essential *** reactive nanoessential oils can form covalent bonds with the wallpaper,thereby remarkably improving the adhesion of the reactive nano-essential oils on the wallpaper and preventing the reactive nano-essential oil from deadhering from the *** active nano essential oil simultaneously overcomes the intense volatility of the essential oil and inconvenience in use,has a simple preparation process and low cost,and has great application potential.

关键词： Reactive nano-essential oils Reactive mesoporous silica nanoparticles Slow-release of essential oils Application to wallpaper Covalent bonds

Construction of Co3o4/Ceo2 Heterostructure Nanoflowers Facilitates Deployment of Oxygen Defects to Enhance the Oxygen Evolution Kinetics

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SSRN 2022年

作者： Wang, Huan Zhang, Qiaoyan Sun, Fengmin Qi, Jian Zhang, Di Sun, Huilan Li, Zhaojin Wang, Qiujun Wang, Bo Hebei Key Laboratory of Flexible Functionals Materials School of Materials Science and Engineering Hebei University of Science and Technology Shijiazhuang050000 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100049 China

The bottom-up design strategy can more rationally optimize the composition and structure of the materials to impart excellent performance. Heterostructures can modulate electronic behavior through interface construction to optimize materials properties for superior performance. In this paper, we created abundant Co 3 O 4 /CeO 2 phase interfaces to tune the grain size, the electronic configuration of cobalt sites, and the content of oxygen defects in Co 3 O 4 , which increases the number of active sites, enhances the electronic conductivity of the material, and optimized the adsorption energy for reaction intermediates. Moreover, the assembly of nanograins into nanoflowers with a three-dimensional hierarchical pore structure can provide more effective active sites, abundant pores and channels for mass transport, and discrete cavities for in-depth reactions of intermediates. The construction of Co 3 O 4 /CeO 2 heterostructure nanoflowers (CoCe HNFs) contributes to the excellent performance of the catalyst. © 2022, The Authors. All rights reserved.

关键词： Reaction intermediates

Synergistic Utilization of Cold Caustic Extraction and Deep Eutectic Solvent for the Production of Dissolving Pulp from Corn Stalks

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SSRN 2023年

作者： Liu, Feng Qi, Tiantian Wei, Quanyuan Zhang, Jie Li, Yingxia Qu, Yongshui Beijing University of Chemical Technology Beijing100029 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Guangxi Provincial Engineering Research Center for Organic Waste Treatment Guangxi 532794 China

This study aimed to produce high-performance dissolving pulps from corn stalks using a combination of Cold caustic extraction (CCE) and deep eutectic solvent (DES) method. Results showed that CCE not only removed hemicellulose but also altered the structure of cellulose, increasing its polymerization degree and influencing the Fock reactivity of the dissolving pulp (reduced to 10.55%). Subsequent treatment with DES effectively dissolving the remaining hemicellulose while disrupting the cellulose crystallinity and improving the Fock reactivity of the dissolving pulp (increased to 72.14% from 10.55%). The study implied that the hydrogen bond donor in DES played a crucial role in breaking the cellulose chains and improving the reactivity of the dissolving pulp. The dissolving pulp produced from corn stalks using through the combination of CCE and DES method exhibited the cellulose content of 94.46% and the Fock reactivity of 72.14%, surpassing the traditional prehydrolysis kraft-based dissolving pulps from wood, providing a new strategy for the high-value utilization of stover resources. © 2023, The Authors. All rights reserved.

关键词： Extraction