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“Coffee ring” controlment in spray prepared >19% efficiency Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5) perovskite solar cells

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Journal of Energy Chemistry 2022年第4期31卷 201-208页

作者： Xinxin Yu Jing Li Yanping Mo Tianxing Xiang Zhiliang Ku Fuzhi Huang Fei Long Yong Peng Yi-Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528437GuangdongChina College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004GuangxiChina

Achieving high-quality perovskite films with uniform morphology and homogeneous crystallinity is challenging owing to the coffee ring effect(CRE) in the spray-coating technologies. In this study, an evaporation/spray-coating two-step deposition method is used to fabricate Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5)light harvesters for perovskite solar cells(PSCs). Considering the solid–liquid reaction, we establish a reaction-dependent regulating strategy that inhibits CRE successfully and prepare a high-quality perovskite layer, wherein the solvent for the FAI/Br solution during the spraying process is changed from isopropanol to n-butyl alcohol(NBA). The retarded-drying-enhanced spreading of the NBA solution inhibits contact line pinning to suppress the capillary flows and increases the reaction between metal halides(CsI/PbI_(2)) and organic salts(FAI/Br), which result in a reduction in the accumulation of solutes in the periphery effectively inhibiting CRE. Consequently, we obtain a high performance Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5) PSC with a power conversion efficiency(PCE) of 19.17%. An enlarged perovskite film(10 × 10 cm^(2)) containing 40 sub-cells is prepared. The average PCE of these devices is 18.33 ± 0.56%, proving the reliability of the "coffee ring" regulating strategy. This study provides an effective approach for CRE controlment in spraying technology to achieve high repeatability devices with good performance.

关键词： Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5)perovskite solar cells Spray coating Coffee ring effect Reaction-dependent regulating strategy

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Light-Programmable Assemblies of Isotropic Micromotors

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Research 2022年第4期2022卷 481-492页

作者： Shengping Che Jianhua Zhang Fangzhi Mou Xia Guo Joshua E.Kauffman Ayusman Sen Jianguo Guan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of Technology122Luoshi RoadWuhan 430070China Department of Chemistry The Pennsylvania State UniversityUniversity ParkPA16802USA

“Life-like”nonequilibrium assemblies are of increasing significance,but suffering from limited steerability as they are generally based on micro/nanomotors with inherent asymmetry in chemical composition or geometry,of which the vigorous random Brownian rotations disturb the local ***,we demonstrate that isotropic photocatalytic micromotors,due to the persistent phoretic flow from the lluminated to shadowed side rrespective of their Brownian rotations,experience lightprogrammable local interactions(reversibly from atraction to repulsion and/or alignment)depending on the direction of the incident ***,they can be organized into a variety of tunable nonequilibrium assemblies,such as apolar solids(i.e.,immobile colloidal crystal),polar liquids(ie.,phototactic colloidal stream),and polar solids(i.e.,phototactic colloidal crystal),which can further be“cut”into a predesigned pattern by utilizing the switching motor-motor interactions at superimposedlight *** work facilitates the development of active matters and motile functional microdevices.

关键词： Brownian rotation nonequilibrium

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Visualization of charge carriers in photocatalysts

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国家科学评论（英文版） 2023年第9期10卷 116-118页

作者： Si-Ming Wu Markus Antonietti Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Laoshan Laboratory Wuhan University of TechnologyChina Department of Colloid Chemistry Max Planck Institute of Colloids and InterfacesGermany

Semiconductors can generate excited charge carriers for photo-or electro-chemical reactions such as water splitting for H2 ***,the dynamic charge-transfer process has been directly observed to reveal the photocatalyti...

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Corrigendum to“Design and fabrication of high-performance self-setting trimagnesium phosphate”[***.28(2023)348-357]

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Bioactive materials 2024年第7期37卷 313-314页

作者： Jiawei Liu Wen Hou Wenying Wei Jian Peng Xiaopei Wu Chenxi Lian Yanan Zhao Rong Tu Takashi Goto Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan430070China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000China New Industry Creation Hatchery Center Tohoku UniversitySendai980-8579Japan

The authors regret that the supplementary Fig.S12 is *** correction does not affect any of the results and conclusions in the ***.S11 and S12 are studies on hydration kinetics and hydration products of M/P=2 and M/P=4 *** the previous uploaded version,the caption and figures of the Fig.S12 are the same as *** have corrected the error and the correct figures are as *** authors are sorry for not checking the supplementary documents carefully before publication.

关键词： hydration correction kinetics

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Julolidine functionalized benzimidazoline-doped fullerene derivatives for efficient and stable perovskite solar cells

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Interdisciplinary materials 2024年第3期3卷 369-379页

作者： Yanqing Zhu Chenglong Li JiaHui Chen Yuxi Zhang Jianfeng Lu Min Hu Wangnan Li Fuzhi Huang Yi-Bing Cheng Hyesung Park Shengqiang Xiao State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhanChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina School of Electronic and Electrical Engineering Hubei Province Engineering Research Centre for Intelligent Micro-Nano Medical Equipment and Key TechnologiesWuhan Textile UniversityWuhanChina Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices Hubei University of Arts and ScienceXiangyangHubeiChina KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulRepublic of Korea Department of Integrative Energy Engineering Korea UniversitySeoulRepublic of Korea Hubei Key Laboratory of Fuel Cell WuhanChina

Fullerene derivatives are highly attractive materials in solar cells,organic thermoelectrics,and other ***,the intrinsic low electron mobility and electrical conductivity restrict their potential device performance,such as perovskite solar cells(PSCs).Herein,we successfully enhanced the electric properties and morphology of phenyl-C61-butyric acid methyl ester(PCBM)by n-doping it with a benzimidazoline derivative,9-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)-julolidine(JLBI-H)via a solution *** found the n-doping can not only improve the conductivity and optimize the band alignment but also enable the PCBM to have a constantly strong charge extraction ability in a wide temperature from 173 to 373 K,which guarantees a stable photovoltaic performance of the corresponding PSCs under a wide range of operating *** the JLBI-H-doped PCBM,we improved the efficiency from 17.9%to 19.8%,along with enhanced stability of the nonencapsulated devices following the aging protocol of ISOS-D-1.

关键词： charge extraction electron mobility n-doping PSCs wide operation temperature

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Sulfur-containing polymer cathode materials: From energy storage mechanism to energy density

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InfoMat 2022年第8期4卷 1-24页

作者： Rong Zou Wenwu Liu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Material Science and EngineeringLanzhou University of TechnologyLanzhouP.R.China

Besides lithium-ion batteries, it is imperative to develop new battery energystorage system with high energy density. In conjunction with the developmentof Li-S batteries, emerging sulfur-containing polymers with tunable sulfur-chain length and organic groups gradually attract much attention as cathodematerials. This can avoid the problems that are impeding the development ofthe typical Li-S batteries, such as volume expansion, active material dissolu-tion, shuttle effect, and so on. This review aims to generalize the type ofsulfur-containing polymers and the working principles in Li-S batteries. Thesulfur-containing polymers (R-Sn-R) with different sulfur-chain length (n > 6,n ≤ 2, and 3 ≤ n ≤ 6) are summarized. It also discusses several organic groupssuch as phenyl rings, N-heterocycles, and unique structure with cross-linkednetworks and multi-micropores skeleton. This review also explores other strat-egies of sulfur-containing polymers in the rest of Li-S batteries, providing asummary of the advantages of sulfur-containing polymers, recent develop-ment, in-depth discussion of the mechanism in Li-S batteries, and organicgroup-structure-performance relationship. This review would have guidelinesfor future development of sulfur-containing polymers in Li-S batteries.

关键词： cathode materials energy density energy storage mechanism Li-S batteries sulfur-containing polymer

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Design and fabrication of high-performance injectable self-setting trimagnesium phosphate

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Bioactive materials 2023年第10期28卷 348-357页

作者： Jiawei Liu Wen Hou Wenying Wei Jian Peng Xiaopei Wu Chenxi Lian Yanan Zhao Rong Tu Takashi Goto Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan 430070China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China New Industry Creation Hatchery Center Tohoku UniversitySendai 980-8579Japan

Magnesium phosphate bone cement has become a widely used orthopedic implant due to the advantages of fast-setting and high early strength. However, developing magnesium phosphate cement possessing applicable injectability, high strength, and biocompatibility simultaneously remains a significant challenge. Herein, we propose a strategy to develop high-performance bone cement and establish a trimagnesium phosphate cement (TMPC) system. The TMPC exhibits high early strength, low curing temperature, neutral pH, and excellent injectability, overcoming the critical limitations of recently studied magnesium phosphate cement. By monitoring the hydration pH value and electroconductivity, we demonstrate that the magnesium-to-phosphate ratio could manipulate the components of hydration products and their transformation by adjusting the pH of the system, which will influence the hydration speed. Further, the ratio could regulate the hydration network and the properties of TMPC. Moreover, in vitro studies show that TMPC has outstanding biocompatibility and bone-filling capacity. The facile preparation properties and these advantages of TMPC render it a potential clinical alternative to polymethylmethacrylate and calcium phosphate bone cement. This study will contribute to the rational design of high-performance bone cement.

关键词： Bone cement Trimagnesium phosphate High compressive strength Injectable Bioactive materials

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Catalytic hosts with strong adsorption strength for long shelf-life lithium-sulfur batteries under lean electrolyte

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Nano Research 2023年第1期16卷 427-438页

作者： Siyuan Zhao Huayu Pei Quan Yang Kangli Liu Yuanyuan Huang Zhuo Wang Guosheng Shao Jinping Liu Junling Guo State Center for International Cooperation on Designer Low-carbon&Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Zhengzhou Materials Genome Institute Xingyang 450100China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China

Low electrolyte/sulfur ratio(E/S)is an important factor in increasing the energy density of lithium-sulfur batteries(LSBs).Recently,the E/S has been widely lowered using catalytic hosts that can suppress“shuttle effect”during cycling by relying on a limited adsorption ***,the shelf-lives of these cathodes have not yet received ***,we show that the selfdischarge of sulfur cathodes based on frequently-used catalytic hosts is serious under low E/S because the“shuttle effect”during storage process caused by polysulfides(PSs)disproportionation cannot be suppressed using a limited adsorption *** further prove that the adsorption strength toward PSs,which is unfortunately weak in commonly-used catalytic hosts,is critical for effectively hindering the disproportionation of the ***,to verify this conclusion,we prepare a sulfur-doped titanium nitride(S-TiN)catalytic array *** the adsorption strength and catalytic activity of TiN can be improved by S doping simultaneously,the constructed S/S-TiN cathodes under a low E/S(6.5μL·mg−1)exhibit better shelf-life and cycle-stability than those of S/TiN *** work suggests that enhancing the adsorption strength of catalytic hosts,while maintaining their function to reduce E/S,is crucial for practical LSBs.

关键词： lithium-sulfur battery low electrolyte/sulfur ratio(E/S) self-discharge catalytic host adsorption strength

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Uniform Metal Sulfide@N-doped Carbon Nanospheres for Sodium Storage: Universal synthesis Strategy and Superior Performance

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Energy & Environmental materials 2023年第2期6卷 389-396页

作者： Kai Yang Hao Fu Yixue Duan Manxiang Wang Minh Xuan Tran Joong Kee Lee Woochul Yang Guicheng Liu Department of Physics Dongguk UniversitySeoul 04620Korea Shaanxi Key Laboratory of Chemical Additives for Industry Shaanxi University of Science and TechnologyXi’an 710021China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China College of Physics and Electronic Information Yan’an UniversityYan’an 716000China Center for Energy Storage Research Clean Energy InstituteKorea Institute of Science and Technology(KIST)Seoul 02792Korea

Nitrogen-doped carbon-coated transition-metal sulfides(TMS@NCs)have been considered as efficient anodes for sodium-ion ***,the uncontrollable morphology and weak core-shell binding forces significantly limit the sodium storage performance and ***,based on the reversible ring-opening reaction of the epoxy group of the tertiary amino group-rich epoxide cationic polyacrylamide(ECP)at the beginning of hydrothermal process(acidic environment)and the irreversible ring-opening(cross-linking reactions)at the late hydrothermal period(alkaline environment),47 nm-sized ZnS@NCs were prepared via a one-pot hydrothermal *** this process,the covalent bonds formed between the ZnS core and elastic carbon shell significantly improved the mechanical and chemical stabilities of ZnS@*** from the nanosize,fast ion/electron transfer,and high stability,ZnS@NC exhibited a high reversible capacity of 421.9 mAh g^(−1) at a current density of 0.1 A g^(−1) after 1000 cycles and a superior rate capability of 273.8 mAh g^(−1) at a current density of 5 A g^(−1).Moreover,via this universal synthesis strategy,a series of TMS@NCs,such as MoS_(2)@NC,NiS@NC,and CuS@NC were developed with excellent capacity and cyclability.

关键词： anode materials core-shell structure nitrogen-doped carbon ring-opening reaction transition-metal sulfide

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Enabling a stable and dendrite-suppressed Zn anode via facile surface roughness engineering

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Journal of materials Science & technology 2022年第7期102卷 272-277页

作者： Jinghao Li Kehan Le Wei Wei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

The safety and cycle lifespan of zinc metal-based aqueous batteries are greatly restricted by zinc *** poor cycling performance of zinc metal anode is often considered to be impacted by the dendrite growth,surface passivation,zinc metal corrosion and hydrogen evolution reaction,while surface roughness is a matter that has often been ignored in past ***,a roughness gradient is constructed on the zinc anode surface by a simple grinding and pasting *** has been found the modified zinc anodes with lower surface roughness exhibit the smaller zinc deposition overpotential and longer cycle ***,in situ optical microscopy photographs indicate that the zinc anode with an optimized roughness enables more uniform distribution of zinc precipitation and corrosion sites,which will facilitate a stable cycling performance of aqueous zinc ion *** Zn anode dendrite-suppressing mechanism via surface roughness engineering was revealed through finite element computational *** results emphasize the effectiveness of roughness engineering for tuning the surface physics of Zn anode and provide a facile strategy to develop better and safer aqueous zinc ion batteries.

关键词： Surface roughness Zn metal anode Surface engineering Aqueous zinc-ion batteries

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