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A facile finger-paint physical modification for bilateral electrode/electrolyte interface towards a stable aqueous Zn battery

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Journal of Energy Chemistry 2023年第6期81卷 101-109,I0004页

作者： Hang Yang Duo Chen Yicheng Tan Hao Xu Li Li Yiming Zhang Chenglin Miao Guangshe Li Wei Han College of Physics the State Key Laboratory of Inorganic Synthesis and Preparative ChemistryInternational Center of Future ScienceJilin UniversityChangchun 130012JilinChina Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016JiangsuChina State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina

Since the electrode/electrolyte interface(EEI)is the main redox center of electrochemical processes,proper manipulation of the EEI microenvironment is crucial to stabilize interfacial behaviors.Here,a finger-paint method is proposed to enable quick physical modification of glass-fiber separator without complicated chemical technology to modulate EEI of bilateral electrodes for aqueous zinc-ion batteries(ZIBs).An elaborate biochar derived from Aspergillus Niger is exploited as the modification agent of EEI,in which the multi-functional groups assist to accelerate Zn^(2+)desolvation and create a hydrophobic environment to homogenize the deposition behavior of Zn anode.Importantly,the finger-paint interface on separator can effectively protect cathodes from abnormal capacity fluctuation and/or rapid attenuation induced by H_(2)O molecular on the interface,which is demonstrated in modified MnO_(2),V_(2)O_(5),and KMn HCF-based cells.The as-proposed finger-paint method opens a new idea of bilateral interface engineering to facilitate the access to the practical application of the stable zinc electrochemistry.

关键词： Aqueous Zinc battery Electrode/electrolyte interface interface modification MnO_(2) V_(2)O_(5) KMnHCF

全干法合成锂离子电池用高镍三元单晶颗粒及性能

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Science China Materials 2024年第2期67卷 650-657页

作者：秦理余海峰姜昕陈灵程起林江浩 Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science andTechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

单晶型高镍三元层状氧化物凭借高能量密度、长循环寿命和优异的安全性成为新一代锂离子电池理想的正极材料.目前,单晶型高镍三元正极通过“共沉淀+高温锂化”两步制备,不仅工艺繁琐、原材料选择单一,制备过程还会产生大量废水/气.本文... 详细信息

单晶型高镍三元层状氧化物凭借高能量密度、长循环寿命和优异的安全性成为新一代锂离子电池理想的正极材料.目前,单晶型高镍三元正极通过“共沉淀+高温锂化”两步制备,不仅工艺繁琐、原材料选择单一,制备过程还会产生大量废水/气.本文提出了一种新的全干法固相合成策略,实现了单晶型高镍三元正极低成本、无废水绿色制备.在煅烧过程引入锶/钛离子作为烧结助剂,降低烧结温度来缓解锂/氧流失,从而降低锂镍混排并稳定晶格氧.此外,针对固相合成过程锂化动力学缓慢导致表面残碱较高的问题,引入硼化合物与残碱反应,不仅有效提升了界面稳定性,而且形成的离子导体还能够加速锂离子在界面处的迁移.因此,制备的单晶型高镍三元正极在0.1 C电流密度下比容量可达到191.1 mA h g^(-1),以1 C电流密度在软包全电池中循环500次后仍具有90.1%的容量保持率.

关键词： Ni-rich cathodes all-dry solid-phase synthesis structural stability interface modification Li-ion batteries

Enhanced photovoltaic performance in TiO_2/P3HT hybrid solar cell by interface modification

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Journal of Semiconductors 2015年第2期36卷 38-41页

作者：王多发陶海征赵修建吉美妍章天金 State Key Laboratory of Silicate Materials for Architecture Wuhan University of Technology Faculty of Materials Science and Engineering Hubei University

A TiO2/P3HT hybrid solar cell was fabricated by infiltrating P3HT into the pores of TiO2 nanorod arrays. To further enhance the photovoltaic performance, anthracene-9-carboxylic acid was employed to modify the interface of TiO2/P3HT before P3HT was coated. Results revealed that the interface treatment significantly enhances the photovoltaic performance of the cell. The efficiency of the hybrid solar cells reaches 0.28% after interface modification, which is three times higher compared with the un-modified one. We find that except for the increased exciton dissociation efficiency recognized by the previous reports, the suppressing of electron back recombination is another important factor leading to the enhanced photovoltaic performance.

关键词： TiO2 solar cell interface modification

Recent advances of interface engineering in inverted perovskite solar cells

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Chinese Physics B 2022年第10期31卷 53-65页

作者：余诗琪熊壮王振涵周海涛马飞瞿子涵赵洋楚新波游经碧 Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Perovskite solar cells(PSCs)have witnessed great achievement in the past decade.Most of previous researches focus on the n-i-p structure of PSCs with ultra-high efficiency.While the n-i-p devices usually used the unstable charge transport layers,such as the hygroscopic doped spiro-OMe TAD,which affect the long-term stability.The inverted device with the p-i-n structure owns better stability when using stable undoped organic molecular or metal oxide materials.There are significant progresses in inverted PSCs,most of them related to charge transport or interface engineering.In this review,we will mainly summarize the inverted PSCs progresses related to the interface engineering.After that,we prospect the future direction on inverted PSCs.

关键词： inverted perovskite solar cells charge transport layer interface modification defect passivation

In situ formed LiF-Li_(3)N interface layer enables ultra-stable sulfide electrolyte-based all-solid-state lithium batteries

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Journal of Energy Chemistry 2023年第4期79卷 272-278页

作者： Ming Wu Mengqi Li Yuming Jin Xinshuang Chang Xiaolei Zhao Zhi Gu Gaozhan Liu Xiayin Yao School of Material Science and Chemical Engineering Ningbo UniversityNingbo 315211ZhejiangChina Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Sulfide solid electrolytes are promising for high energy density and safety in all-solid-state batteries due to their high ionic conductivity and good mechanical properties.However,the application of sulfide solid electrolytes in all-solid-state batteries with lithium anode is restricted by the side reactions at lithium/electrolytes interfaces and the growth of lithium dendrite caused by nonuniform lithium deposition.Herein,a homogeneous LiF-Li_(3)N composite protective layer is in situ formed via a manipulated reaction of pentafluorobenzamide with Li metal.The LiF-Li_(3)N layer with both high interfacial energy and interfacial adhesion energy can synergistically suppress side reactions and inhibit the growth of lithium dendrite,achieving uniform deposition of lithium.The critical current densities of Li_(10)GeP_(2)S_(12)and Li_(6)PS_(5)Cl are increased to 3.25 and 1.25 mA cm^(-2)with Li@LiF-Li_(3)N layer,which are almost triple and twice as those of Li-symmetric cells in the absence of protection layer,respectively.Moreover,the Li@LiF-Li_(3)N/Li10GeP2S12/Li@LiF-Li_(3)N cell can stably cycle for 9000 h at 0.1 mA cm^(-2)under 0.1 mA h cm^(-2),and Li@LiF-Li_(3)N/Li_(6)PS_(5)Cl/Li@LiF-Li_(3)N cell achieves stable Li plating/stripping for 8000 h at 0.1 mA cm^(-2)under10 m A h cm^(-2).The improved dynamic stability of lithium plating/stripping in Li@LiF-Li_(3)N/Li_(10)GeP_(2)S_(12)or Li_(6)PS_(5)Cl interfaces is proved by three-electrode cells.As a result,LiCoO_(2)/electrolytes/Li@LiF-Li_(3)N batteries with Li_(10)GeP_(2)S_(12)and Li_(6)PS_(5)Cl exhibit remarkable cycling stability of 500 cycles with capacity retentions of 93.5%and 89.2%at 1 C,respectively.

关键词： LiF-Li_(3)N Sulfide solid electrolytes interface modification High interface energy All-solid-state batteries

Significantly improved photocatalysis-self-Fenton degradation performance over g-C3N4 via promoting Fe(Ⅲ)/Fe(Ⅱ)cycle

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Rare Metals 2022年第7期41卷 2429-2438页

作者： Le Chen Xin-Xia He Ze-Han Gong Jia-Lian Li Yang Liao Xiao-Ting Li Jun Ma College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068China Department of Science and Technology Sichuan Normal UniversityChengdu 610068China Key Laboratory of Land Resources Evaluation and Monitoring in Southwest Ministry of EducationChengdu 610068China

Photocatalysis-self-Fenton system,i.e.,photo-catalytic H_(2)O_(2)generation and utilization in situ for OH radials production to remove organic pollutants with high-fluent degradation and mineralization performance pos-sesses such advantages as cleanliness,efficiency and safety.However,its degradation activity always suffers from the Fe(Ⅲ)/Fe(Ⅱ)cycle.For this reason,graphitic carbon interface-modified g-C_(3)N_(4)(CUCN)was fabricated to remarkably improve photocatalysis-self-Fenton degra-dation activity.The experiment results indicated that CUCN-2%photocatalyst,in which the loading percentage of graphitic carbon was 2%,demonstrated the optimum degradation performance among all the counterparts.The mineralization degree for RhB in 3 h over CUCN-2%reached 63.77%,nearly 3.35-fold higher than the pristine g-C_(3)N_(4).The significantly improved mineralization efficiency was ascribed to the promoted Fe(Ⅲ)/Fe(Ⅱ)cycle by photogenerated electrons,which leading to the higher utilization efficiency of H_(2)O_(2)through Fenton reaction,thereby producing more hydroxyl radicals.It is anticipated that our work could provide new insights for the design of photocatalysis-self-Fenton system with exceptional degradation performance for actual photocat-alytic applications.

关键词： g-C_(3)N_(4) Photocatalysis-self-Fenton degradation Fe(Ⅲ)/Fe(Ⅱ)cycle interface modification Graphitic carbon

Tuning redox activity through delithiation induced protective layer and Fe-O coordination for Li-rich cathode with improved voltage and cycle performance

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Journal of Energy Chemistry 2022年第8期31卷 266-276,I0008页

作者： Kanghui Hu Li Ren Weifeng Fan Bing Zhang Meihua Zuo Yanhui Zhang Genpin Lv Huiyuan Xu Wei Xiang Xiaodong Guo College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059SichuanChina Yibin Libode New Materials Co. Ltd.Yibin 644200SichuanChina Shaoguan HEC Technology R&D Co. Ltd.Ruyuan 512000GuangdongChina Yibin Tianyuan Grp Co. Ltd.Yibin 644200SichuanChina School of Chemical Engineering Sichuan UniversityChengdu 610065SichuanChina

Li-rich layered transition metal oxides are one of the most promising cathode materials for their high energy density.However,the cathodes usually suffer from severe potential dropping and capacity fading during cycling,which are associated with the surface oxygen release and accompanied by cation densification and structural collapse.Herein,an integrative approach of simultaneous constructing uniform 3d Fe-ion doping in the transition metal layer and Li-rich Li_(5)FeO_(4) shell to grab the oxygen and prevent interfacial side reactions is proposed.The introduction of Fe induces higher redox potential and stronger 3 d Fe-O_(2)p covalent bond,triggering reversible anionic redox via a reductive coupling mechanism.And the delithiated product of Li-rich Li_(5)FeO_(4) not only acts as a protective layer alleviating the side reactions but also enhances the surface kinetic property.With the benefit of promoted reversibility of oxygen redox and enhanced surface stability,the cathode exhibits high reversible capacity and superior cycle performance.Density function theory calculation indicates that the O_(2)p non-bonding state in the cathode incorporated with Fe sits at a lower energy band,resulting in higher energy storage voltage and improved oxygen stability.Consequently,the modified cathode exhibits a discharge specific capacity of 307 m A h g^(-1)(1 C=250 m A g^(-1)),coulombic efficiency of 82.09%in the initial cycle at 0.1 C and 88.34%capacity retention after 100 cycles at 1 C.The work illustrates a strategy that could simultaneously enhance oxygen redox reversibility and interface stability by constructing lattice bond coordination and delithiation induced protective layer to develop Li-rich materials with high reversible capacity and long lifespan.

关键词： Li-rich cathode Lattice oxygen evolution Tuning redox activity interface modification

A Charge Equalizer in Accordion-MXene-Modified Layer Leading to Spherical Lithium Deposition

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Energy & Environmental Materials 2023年第6期6卷 335-344页

作者： Yangmingyue Zhao Libo Li Da Zhou Yuhang Shan Xiaochuan Chen Wenjun Cui School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China

Lithium-ion batteries with polymer electrolytes(PEs)are promising candidates for high safety performance batteries.However,conventional PEs suffer from poor compatibility and high impedance of electrolyte-electrode interfaces.Herein,we present a method of the interfacial modification for PEs to inhibit lithium dendrites based on the solution to the interfacial compatibility.Our strategy is to improve the interfacial properties and inhibit the dendrite generation by coating a modified layer on PEs of the anode side with acetylene black(AB)and MXene.The mixed conductive layer(MCL)can promote the generation of Li3N and LiF with a uniform arrangement of electrons to form a dense solid electrolyte interphase layer and the even lithium-ion deposition for improving the performance and stability of the battery during cycling.After adding the MCL,the discharge capacity of solid lithium-ion batteries(SLIBs)with lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)/organic modified montmorillonite(OMMT)/soybean isolate protein(SPI)/poly(vinylidene fluoride)(PVDF)(LOSP)PE from 74.2 mAh g^(-1)up to 111.1 mAh g^(-1)(AB-LiTFSI/OMMT/SPI/PVDF(AB-LOSP))and 111.6 mAh g^(-1)(AB/MXene-LiTFSI/OMMT/SPI/PVDF(AB/MXene-LOSP)).The polarization voltage dropped by 0.06 and 0.12 V,respectively.This work represents a milestone in the dendrite-free SLIBs with good performances.

关键词： dendrite-free interface modification lithium-ion batteries polymer electrolyte SEI film

Enhancing the performance of organic solar cells by modification of cathode with a self-assembled monolayer of aromatic organophosphonic acid

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Chinese Chemical Letters 2023年第4期34卷 526-530页

作者： Wenlong Liu Hao Lu Yan Zhang Hao Huang Xinming Zheng Yahui Liu Youzhi Wu Xinjun Xu School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China College of Textiles&Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao 266071China

We use a single-molecule self-assembled layer of an aromatic organophosphonic acid(2PACz) to modify the cathode interface layer in inverted organic solar cells(OSCs). The modified OSCs not only have an obvious improvement in power conversion efficiency(PCE), but also demonstrate greatly enhanced air stability. Ultraviolet photoelectron spectroscopy shows that the work function of cathode interlayer after modification by 2PACz is more suitable for electron extraction. In addition, the surface energy is reduced without affecting the film deposition, which will be beneficial to reduce the interfacial traps. As a result,the PCE of OSCs based on the PBDB-T:IT-M system is increased, and its stability in air is greatly improved(remaining 88% of its initial PCE after 555 h in air). Therefore, we provide a new strategy for constructing high-performance non-fullerene OSCs with enhanced air stability.

关键词： Organic solar cells interface modification Self-assembled monolayer Stability PCE