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Enhanced electrochemical performance of Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) solid electrolyte by anion doping

Nano Research 2024年第3期17卷 1465-1472页

作者： Jingrui Kang Xu Guo Rui Gu Honglei Hao Yi Tang Jiahui Wang Li Jin Hongfei Li Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Energy and Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China

Nowadays,the majority of the studies on the substitution are focused on cations(such as Y^(3+),Ti^(4+),P^(5+),etc.)in Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP),while there are few studies on the substitution of anion O^(2-).In this work,the modified LATP with a series of LiCl(LATPClx,x=0.1,0.2,0.3,0.4)additives is prepared to enhance ionic *** successful introduction of Cl-makes the length of the c axis decrease from 20.822(2)to 20.792(1)Å,and the bulk conductivity of 2.13×10^(-3) S·cm^(-1) is achieved in LATPCl_(0.3).Moreover,the Al/Ti-O1/Cl1 and Al/Ti-O_(2)/Cl_(2) distance decrease,while the Li1-O_(2)/Cl_(2) distance *** ions migrate more easily in the nanochannel of *** addition,the LiCl additive increases the relative density and the grain boundary conductivity of LATPClx ***,a higher ionic conductivity of 2.12×10^(–4) S·cm^(-1) and a low activation energy of 0.30 eV are obtained in LATPCl_(0.3).Correspondingly,the symmetric cell exhibits a low overpotential of±50 mV for over 200 h in LATPCl_(0.3).The solid-state Li|LATPCl_(0.3)|NCM811(NCM811=LiNi0.8Co0.1Mn0.1O_(2))battery exhibits high initial capacity 185.1 mAh·g^(-1) with a capacity retention rate of 95.4%after 100 cycles at 0.5 *** result suggests that LiCl additive is an effective strategy to promote electrochemical properties of LATP solid electrolyte and can be considered for reference to other inorganic solid electrolytes systems.

关键词： Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)solid electrolyte anion doping ionic conductivity cyclic performance

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Chlorine-anion doping induced multi-factor optimization in perovskites for boosting intrinsic oxygen evolution

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Journal of Energy Chemistry 2021年第1期30卷 115-120,I0004页

作者： Yinlong Zhu Qian Lin Zhenbin Wang Dongchen Qi Yichun Yin Yu Liu Xiwang Zhang Zongping Shao Huanting Wang Department of Chemical Engineering Monash UniversityClaytonVIC 3800Australia Department of Physics Technical University of Denmark2800 Kongens LyngbyDenmark School of Chemistry and Physics Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland 4001Australia Department of Chemical Engineering Curtin UniversityPerthWestern Australia 6845Australia

The oxygen evolution reaction(OER) plays a crucial role in many electrochemical energy technologies,and creating multiple beneficial factors for OER catalysis is desirable for achieving high catalytic ***,we highlight a new halogen-chlorine(Cl)-anion doping strategy to boost the OER activity of perovskite *** a proof-of-concept,proper Cl doping at the oxygen site of LaFeO3(LFO) perovskite can induce multiple favorable characteristics for catalyzing the OER,including rich oxygen vacancies,increased electrical conductivity and enhanced Fe-O *** from these factors,the LaFeO2.9-δCl0.1(LFOCl) perovskite displays significant intrinsic activity enhancement by a factor of around three relative to its parent *** work uncovers the effect of Cl-anion doping in perovskites on promoting OER performance and paves a new way to design highly efficient electrocatalysts.

关键词： anion doping Halogen chlorine Multiple beneficial factors Oxygen evolution reaction Perovskite oxide

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Metal-to-insulator transition in oxide semimetals by anion doping

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Interdisciplinary Materials 2024年第3期3卷 358-368页

作者： Haitao Hong Huimin Zhang Shan Lin Jeffrey A.Dhas Binod Paudel Shuai Xu Shengru Chen Ting Cui Yiyan Fan Dongke Rong Qiao Jin Zihua Zhu Yingge Du Scott A.Chambers Chen Ge Can Wang Qinghua Zhang Le Wang Kui-juan Jin Shuai Dong Er-Jia Guo Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijingChina Department of Physics&Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Key Laboratory of Quantum Materials and Devices of Ministry of Education School of PhysicsSoutheast UniversityNanjingChina Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTennesseeUSA Physical and Computational Sciences Directorate Pacific Northwest National LaboratoryRichlandWashingtonUSA School of Chemical Biological and Environmental EngineeringOregon State UniversityCorvallisOregonUSA Beijing Advanced Innovation Center for Materials Genome Engineering Department of Physical ChemistryUniversity of Science and Technology BeijingBeijingChina Environmental Molecular Sciences Laboratory Pacific Northwest National LaboratoryRichlandWashingtonUSA Songshan Lake Materials Laboratory DongguanGuangdongChina

Oxide semimetals exhibiting both nontrivial topological characteristics stand as exemplary parent compounds and multiple degrees of freedom,offering a promise for the realization of novel electronic *** this work,we report the structural and transport phase transition in an oxide semimetal,SrNbO_(3),achieved through effective anion ***,the resistivity increased by more than three orders of magnitude at room temperature upon *** extent of electronic modulation in SrNbO_(3)is strongly correlated with misfit strain,underscoring its phase instability to both chemical doping and crystallographic symmetry *** first-principles calculations,we discern that elevating the level of nitrogen doping induces an upward shift in the conductive bands of SrNbO_(3−δ)N_(δ).Consequently,a transition from a metallic state to an insulating state becomes apparent as the nitrogen concentration reaches a threshold of 1/*** investigation shows effective anion engineering in oxide semimetals,offering pathways for manipulating their physical properties.

关键词： anion doping metal-to-insulator transition oxide semimetal phase transition

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High content anion(S/Se/P)doping assisted by defect engineering with fast charge transfer kinetics for high-performance sodium ion capacitors

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Science Bulletin 2021年第18期66卷 1858-1868,M0003页

作者： Xinglan Deng Kangyu Zou Roya Momen Peng Cai Jun Chen Hongshuai Hou Guoqiang Zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China State Key Laboratory of Powder Metallurgy College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

The rate-determining process for sodium storage in TiO2 is greatly depending on charge transfer happening in the electrode materials owing to its inferior diffusion coefficient and electronic *** from reducing the diffusion distance of ion/electron,the increasement of ionic/electronic mobility in the crystal lattice is also very important for charge ***,an oxygen vacancy(OV)engineering assisted in high-content anion(S/Se/P)doping strategy to enhance charge transfer kinetics for ultrafast sodium-storage performance is *** calculations indicate that OV-engineering evokes spontaneous S doping into the TiO2 phase and achieves high dopant concentration to bring about impurity state electron donor and electronic delocalization over S occupied sites,which can largely reduce the migration barrier of Na+.To realize the speculation,high-content anion doped anatase TiO2/C composites(9.82 at%for S in A-TiO2–x-S/C)are elaborately *** optimized A-TiO2–x-S/C anode exhibits extraordinarily high-rate capability with 209.6 mAh g-1at 5000 mA *** assembled sodium ion capacitors deliver an ultrahigh energy density of 150.1 Wh kg-1at a power density of 150 W kg-1when applied as anode *** work provides a new strategy to realize high content anion doping concentration,and enhances the charge transfer kinetics for TiO2,which delivers an efficient approach for the design of electrode materials with fast kinetic.

关键词： Vacancy engineering anion doping Charge transfer kinetics Sodium ion capacitors Titanium dioxide

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Synergistic effect of N- and F-codoping on the structure and photocatalytic performance of TiO_2

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Journal of Environmental Sciences 2015年第2期27卷 148-156页

作者： Jiemei Yu Zongming Liu Haitao Zhang Taizhong Huang Jitian Han Yihe Zhang Daohuang Chong School of Energy and Power Engineering Shandong University School of Chemistry and Chemical Engineering University of Jinan School of Materials Science and Technology China University of Geosciences

Three types of TiO2 nanostructures were synthesized via a facile hydrolysis method at195 °C. Effects of the preparation method and doping with N and F on the crystal structure and photocatalytic performance of TiO2 were investigated. The nanomaterials were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller porosimetry, ultraviolet–visible diffuse reflectance spectroscopy and fluorescent emission spectra. Their photo-catalytic activity was examined by the photodegradation of methylene blue in aqueous solution under both ultra-violet and visible light irradiation. The results show that nitrogen and fluorine co-doped anatase TiO2 had the characteristics of a smaller crystalline size, broader light absorption spectrum and lower charge recombination than pure TiO2. Most importantly, more efficient photocatalytic activity under both ultra-violet and visible light was observed. The obtained N–F-TiO2 nanomaterial shows considerable potential for water treatment under sunlight irradiation.

关键词： TiO2hydrolysis anion doping Photocatalyst Nanoparticle

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低电负性阴离子掺杂调控钴酸锌的电子结构以提高析氧反应活性

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Science China Materials 2023年第5期66卷 1793-1800页

作者：熊兵葛良兵雷雪颜汪扬凯杨吉文李威威李晓宁程振祥傅正平陆亚林 CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Institute for Superconducting and Electronic Materials(ISEM) University of WollongongWollongong 2500Australia Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information&Quantum Physics Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China

电子结构和电导率是析氧反应活性的重要描述符,它们可以通过掺杂来调节.鉴于金属掺杂通常会减少电催化剂的活性位点数量,本工作探究了阴离子掺杂对尖晶石钴酸锌(ZCO)电子结构及其析氧活性的影响.与三价钴为主的ZCO相比,用电负性较低的... 详细信息

电子结构和电导率是析氧反应活性的重要描述符,它们可以通过掺杂来调节.鉴于金属掺杂通常会减少电催化剂的活性位点数量,本工作探究了阴离子掺杂对尖晶石钴酸锌(ZCO)电子结构及其析氧活性的影响.与三价钴为主的ZCO相比,用电负性较低的硫取代氧会提高低自旋态(t_(2g)-^(6)e_(g)^(1))二价钴的占比,其析氧活性要高于低自旋态的三价钴(t_(2g)-^(6)e_(g)^(0)).掺硫钴酸锌(ZCO-S)中钴离子和阴离子之间的电子密度的再分布导致了二价钴的增多,而且钴和硫离子间的强共价作用也会加速电荷迁移.ZCO-S在1.65伏(相对于可逆氢电极)下的比活性比原始ZCO高11倍.相反,掺入具有较高电负性和价态的氟(F)并不能有效地改善电子结构,最终导致材料析氧活性的降低.本工作建立了所掺阴离子的电负性与钴酸锌本征析氧活性之间的联系,并提供了一种通过掺杂不同电负性的阴离子来调控尖晶石氧化物的电子结构的简单有效的方法,这为合理设计高性能尖晶石电催化剂提供了新途径.

关键词： oxygen evolution reaction anion doping electronegativity electronic structure spinel

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