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Regulating the inner Helmholtz plane structure at the electrolyte-electrode interface for highly reversible aqueous Zn batteries

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Journal of Energy Chemistry 2024年第8期95卷 57-67,I0002页

作者： Jianghe Liu sanlue hu Hexin Guo Guobin Zhang Wen Liu Jianwei Zhao Shenhua Song Cuiping Han Baohua Li Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina Shenzhen Key Laboratory of Advanced Materials School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina Shenzhen huASUAN Technology Co. Ltd.Shenzhen 518055GuangdongChina

The development of aqueous Zn batteries is limited by parasitic water reactions,corrosion,and dendrite *** address these challenges,an inner Helmholtz plane(IHP)regulation method is proposed by employing low-cost,non-toxic maltitol as the electrolyte *** preferential adsorption behavior of maltitol can expel the water from the inner Helmholtz plane,and thus hinder the immediate contact between Zn metal and H_(2)***,strong interaction between maltitol and H_(2)O molecules can restrain the activity of H_(2)***,the"IHP adsorption effect"along with the low LUMO energy level of maltitol-CF_(3)SO_(3)^(-)can promote the in-situ formation of an organic-inorganic complex solid electrolyte interface(SEI)*** a result,the hydrogen/oxygen evolution side reaction,corrosion,and dendrites issues are effectively suppressed,thereby leading to highly reversible and dendrite-free Zn plating/*** Zn‖I_(2)battery with hybrid electrolytes also demonstrates high electrochemical performance and ultralong cycling stability,showing a capacity retention of 75%over 20000 charge-discharge cycles at a large current density of 5 A g^(-1).In addition,the capacity of the device has almost no obvious decay over20000 cycles even at-30℃.This work offers a successful electrolyte regulation strategy via the IHP adsorption effect to design electrolytes for high-performance rechargeable Zn-ion batteries.

关键词： Inner Helmholtz plane Adsorption effect Dendrite suppression SEI layer Zn||I_(2)battery

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Material exploration via designing spatial arrangement of octahedral units: a case study of lead halide perovskites

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Frontiers of Optoelectronics 2021年第2期14卷 252-259页

作者： Pengfei FU sanlue hu Jiang TANG Zewen XIAO Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Physics Huazhong University of Science and TechnologyWuhan 430074China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Halide perovskites have attracted tremendous attention as semiconducting materials for various optoelectronic *** functional metal-halide octahedral units and their spatial arrangements play a key role in the optoelectronic properties of these *** present,most of the efforts for material exploration focus on substituting the constituent elements of functional octahedral units,whereas designing the spatial arrangement of the functional units has received relatively little *** this work,via a global structure search based on density functional theory(DFT),we discovered a metastable three-dimensional honeycomb-like perovskite structure with the functional octahedral units arranged through mixed edge-and *** experimentally confirmed that the honeycomb-like perovskite structure can be stabilized by divalent molecular cations with suitable size and shape,such as 2,2’-bisimidazole(BIM).DFT calculations and experimental characterizations revealed that the honeycomb-like perovskite with the formula of BIMPb2l6,synthesized through a solution process,exhibits high electronic dimensionality,a direct allowed bandgap of 2.1 eV,small effective masses for both electrons and holes,and high optical absorption coefficients,which indicates a significant potential for optoelectronic *** employed combination of DFT and experimental study provides an exemplary approach to explore prospective optoelectronic semiconductors via spatially arranging functional units.

关键词： lead halide perovskite electronic dimensionality functional octahedral units optoelectronic properties photodetector

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Reversible Release and Fixation of Bromine in Vacancy-Ordered Bromide Perovskites

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Energy & Environmental Materials 2020年第4期3卷 535-540页

作者： Yang-Peng Lin Bing Xia sanlue hu Yu Zhong Yue-E huang Zhi-Zhuan Zhang Ni Wu Yong-Wei Wu Xiao-hui Wu Xiao-Ying huang Zewen Xiao Ke-Zhao Du College of Chemistry and Materials Science Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical EngomineeringFujian Normal UniversityFuzhou 350007China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Bromine is an irreplaceable reagent for many important applications including necessary additive for flame retardants and rubber ***,the toxicity,causticity,and vaporability of bromine make the safe usage and transportation of bromine challenging,which can be alleviated by the bromine ***,vacancy-ordered bromide perovskites such as Cs^(4)Sb_(2)Br_(12)and Cs_(2)PdBr_(6)are selected out for the bromine fixation through density-functional theory calculations and *** redox within the bromide perovskites is designed to provide the driving force for the reversible release and fixation of *** and cooling the title bromide perovskites in a necked ampoule make the bromine visible and separable from the solid *** composition engineering(i.e.,Cs_(4)Sb_(2)Br_(12)vs Rb_(4)Sb_(2)Br_(12),and Cs_(4)Sb_(2)Br_(12)vs Cs_(2)PdBr_(6))can effectively tune the stability(against water and high temperature)and the bromine storage capacity(from9.30%to 18.76%).In addition,this work can provide a one-step preparation method for the liquid bromine without further purification.

关键词： bromine fixation-release halide perovskite redox

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Unlocking high-performance organic cathodes:tailoring active group densities in covalent frameworks for aqueous zinc ion batteries

Energy Materials and Devices

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Energy Materials and Devices 2023年第1期1卷 107-117,106页

作者： Meilin Li Fanbin Zeng Senlin Li sanlue hu Qingming Liu Tengfei Zhang Jun Zhou Cuiping Han Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Shenzhen Key Laboratory of Energy Materials for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Towngas Energy Academy Shenzhen 518000China

Aqueous zinc ion batteries(AZIBs)are a promising energy storage technology due to their cost-effectiveness and *** materials with sustainable and designable structures are of great interest as AZIBs ***,small molecules in organic cathode materials face dissolution problems and suboptimal cycle life,whereas large molecules suffer from a low theoretical capacity due to their inert carbon ***,we designed two covalent organic framework(COF)materials(benzoquinoxaline benzoquinone-based COF(BB-COF)and triquinoxalinylene benzoquinone-based COF(TB-COF))with the same structure and number of energy storage groups to investigate the correlation between the densities of active sites and electrochemi-cal *** conclude that the electrochemical behavior of organic conjugate-based energy storage materials lacks a linear correlation with active site *** active site densities is crucial for mate-rial ***-COF and TB-COF with dual active sites(C=O and C=N)exhibit distinct ***-COF,which has dense active groups,shows a high initial capacity(222 mAh g^(-1)).Conversely,BB-COF,which features a large conjugated ring diameter,presents superior rate performance and enduring cycle *** even maintains stable cycling for 2000 cycles at-40℃.In-situ electrochemical quartz crystal mic-robalance tests reveal the energy storage mechanism of BB-COF,in which H+storage is followed by Zn2+storage.

关键词： organic electrode materials covalent organic frameworks active group density modulation aqueous zinc ion batteries

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